<table><caption>Table 3: Data used for TO phyllosilicates. *R*: mean ionic radius of octahedral cations (see text); *b*: crystallographic parameter (in Å).
*Sample reference in the paper.</caption><thead><tr><th>TO structure</th><th>Sample*</th><th>R</th><th>b</th><th>References</th><th>Comments</th></tr></thead><tbody><tr><td><strong>Natural kaolinite</strong></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Si<sub>2</sub>Al<sub>2</sub>O<sub>5</sub>(OH)<sub>4</sub></td><td>Keokuk (Iowa, USA)</td><td>0.535</td><td>8.945</td><td>Bish & Von Dreele (1989)</td><td></td></tr><tr><td><strong>Synthetic kaolinites</strong></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Fe<sup>3+</sup>-kaolinite series Si<sub>2</sub>(Al<sub>2-x</sub>Fe<sup>3+x</sup>)O<sub>5</sub>(OH)<sub>4</sub><br>(octahedral composition)</td><td></td><td></td><td></td><td>Petit (1990)</td><td></td></tr><tr><td>Al<sub>1.93</sub>Fe<sup>3+0.07</sup></td><td>a = 0.1</td><td>0.539</td><td>8.952</td><td></td><td></td></tr><tr><td>Al<sub>1.88</sub>Fe<sup>3+0.12</sup></td><td>a = 0.2</td><td>0.542</td><td>8.959</td><td></td><td></td></tr><tr><td>Al<sub>1.85</sub>Fe<sup>3+0.15</sup></td><td>a = 0.3</td><td>0.543</td><td>8.966</td><td></td><td></td></tr><tr><td>Al<sub>1.68</sub>Fe<sup>3+0.32</sup></td><td>KAF28</td><td>0.553</td><td>8.960</td><td></td><td></td></tr><tr><td>Al<sub>1.59</sub>Fe<sup>3+0.41</sup></td><td>KAF42</td><td>0.558</td><td>8.976</td><td></td><td></td></tr><tr><td>Al<sub>1.49</sub>Fe<sup>3+0.51</sup></td><td>KAF54</td><td>0.563</td><td>8.984</td><td></td><td></td></tr><tr><td>Fe<sup>3+</sup></td><td>theoretical end-member</td><td>0.645</td><td>9.094</td><td></td><td></td></tr><tr><td>R<sup>3+</sup>-kaolinite series Si<sub>2</sub>(Al<sub>2-x</sub>R<sup>3+x</sup>)O<sub>5</sub>(OH)<sub>4</sub><br>(octahedral composition)</td><td></td><td></td><td></td><td>Bentabol et al. (2009)</td><td></td></tr></tbody></table>

<figure><img src="image_32.png" /></figure>

Mineralogical Society

This is a 'preproof' accepted article for Clay Minerals. This version may be subject to change during the production process.
DOI: 10.1180/clm.2023.20
<table><tr><td>Al<sub>1.96</sub>Fe<sub>0.04</sub></td><td>Fe K100</td><td>0.537</td><td>8.928</td></tr><tr><td>Al<sub>1.95</sub>Ga<sub>0.05</sub></td><td>Ga K100</td><td>0.537</td><td>8.934</td></tr><tr><td>Al<sub>1.89</sub>Fe<sub>0.01</sub>Cr<sub>0.11</sub></td><td>Cr K100 (1)</td><td>0.539</td><td>8.946</td></tr><tr><td>Al<sub>1.47</sub>Fe<sub>0.01</sub>Cr<sub>0.52</sub></td><td>Cr K100 (2)</td><td>0.556</td><td>9.030</td></tr></table>

<table><tr><td>Ga<sup>3+</sup>-kaolinite</td><td></td><td></td><td></td></tr><tr><td>Si<sub>2</sub>(Al<sub>1.76</sub>Ga<sup>3+</sup><sub>0.24</sub>)O<sub>5</sub>(OH)<sub>4</sub></td><td></td><td>0.545</td><td>8.97</td><td>Martin et al. (1998)</td></tr></table>

### Lizardite (anhydrous composition)

<table><tr><td>(Si<sub>1.94</sub>Al<sub>0.06</sub>) (Mg<sub>2.83</sub>Fe<sup>2+</sup><sub>0.07</sub>Al<sub>0.09</sub>)</td><td>Coli 1T</td><td>0.716</td><td>9.223</td><td>Mellini & Zanazzi (1987)</td></tr><tr><td>(Si<sub>1.93</sub>Al<sub>0.07</sub>) (Mg<sub>2.83</sub>Fe<sup>2+</sup><sub>0.05</sub>Al<sub>0.1</sub>)</td><td>Coli 2H1</td><td>0.715</td><td>9.211</td><td>Mellini & Viti (1994)</td></tr><tr><td>(Si<sub>1.93</sub>Al<sub>0.07</sub>) (Mg<sub>2.74</sub>Fe<sup>2+</sup><sub>0.16</sub>Al<sub>0.09</sub>)</td><td>Monte Fico 1T</td><td></td><td></td><td></td></tr><tr><td></td><td>MFN3-1</td><td>0.718</td><td>9.232</td><td></td></tr><tr><td></td><td>MFN3-6</td><td></td><td>9.246</td><td></td></tr><tr><td>(Si<sub>1.996</sub>Al<sub>0.004</sub>) (Mg<sub>2.987</sub>Fe<sup>2+</sup><sub>0.004</sub>Mn<sub>0.005</sub>Al<sub>0.004</sub>)</td><td>Gew-graze 1T</td><td></td><td></td><td>Mellini et al. (2010)</td></tr><tr><td></td><td>KG-2</td><td>0.720</td><td>9.163</td><td></td></tr><tr><td></td><td>KG-3</td><td></td><td>9.199</td><td></td></tr><tr><td>Si<sub>2</sub> (Mg<sub>2.87</sub>Ni<sub>0.05</sub>Fe<sup>3+</sup><sub>0.03</sub>Al<sub>0.02</sub>)</td><td>Valojoro, Madagascar</td><td>0.717</td><td>9.180</td><td>Brindley & Wan (1975)</td></tr></table>

### Synthetic lizardite series Si<sub>2</sub>(Mg<sub>3-x</sub>Ni<sub>x</sub>)O<sub>5</sub>(OH)<sub>4</sub> (octahedral composition)

<table><tr><td>Mg<sub>3</sub></td><td>x = 0</td><td>0.720</td><td>9.226</td></tr><tr><td>Mg<sub>2.5</sub>Ni<sub>0.5</sub></td><td>x = 0.5</td><td>0.715</td><td>9.218</td></tr><tr><td>Mg<sub>2</sub>Ni<sub>1</sub></td><td>x = 1</td><td>0.710</td><td>9.209</td></tr><tr><td>Mg<sub>1.5</sub>Ni<sub>1.5</sub></td><td>x = 1.5</td><td>0.705</td><td>9.199</td></tr><tr><td>Mg<sub>1</sub>Ni<sub>2</sub></td><td>x = 2</td><td>0.700</td><td>9.191</td></tr><tr><td>Mg<sub>0.5</sub>Ni<sub>2.5</sub></td><td>x = 2.5</td><td>0.695</td><td>9.185</td></tr><tr><td>Ni<sub>3</sub></td><td>x = 3</td><td>0.690</td><td>9.181</td></tr><tr><td>Synthetic Co-lizardite</td><td></td><td></td><td></td></tr><tr><td>Si<sub>2</sub>Co<sub>3</sub>O<sub>5</sub>(OH)<sub>4</sub></td><td>Co-antigorite</td><td>0.745</td><td>9.220</td><td>Dalmon & Martin (1968)</td><td>same sample</td></tr></table>
<table><thead><tr><th></th><th></th><th></th><th></th><th></th></tr></thead><tbody><tr><td colspan="5"><strong>Synthetic chrysotile series Si<sub>2</sub>(R<sup>2+</sup>)<sub>3</sub>O<sub>5</sub>(OH)<sub>4</sub></strong><br>(octahedral composition)</td></tr><tr><td>Mg<sub>3</sub></td><td>Mg-chrysotile</td><td>0.720</td><td>9.216</td><td>Jasmund et al. (1975)</td></tr><tr><td>Ni<sub>3</sub></td><td>Ni-chrysotile</td><td>0.690</td><td>9.162</td><td></td></tr><tr><td>Co<sub>3</sub></td><td>Co-chrysotile</td><td>0.745</td><td>9.240</td><td></td></tr><tr><td>Mg<sub>3</sub></td><td>Mg-chrysotile</td><td>0.720</td><td>9.241</td><td>Falini et al. (2004)</td></tr><tr><td colspan="5"><strong>Antigorite (anhydrous composition)</strong></td></tr><tr><td>(Si<sub>1.99</sub>Al<sub>0.01</sub>)(Mg<sub>2.67</sub>Fe<sup>2+0.1</sup>Al<sub>0.04</sub>)</td><td>Val Malenco, Italy</td><td>0.719</td><td>9.251</td><td>Capitani & Mellini (2004)</td></tr><tr><td>(Si<sub>1.87</sub>Al<sub>0.13</sub>)(Mg<sub>2.57</sub>Fe<sup>2+0.195</sup>Fe<sup>3+0.156</sup>Al<sub>0.01</sub>)</td><td>Natural n°9</td><td>0.719</td><td>9.350</td><td>Tomisaka & Kato (1963)</td></tr><tr><td>(Si<sub>2.008</sub>) (Mg<sub>2.58</sub>Fe<sup>2+0.208</sup>Fe<sup>3+0.06</sup>Al<sub>0.138</sub>)</td><td>Natural n°14</td><td>0.714</td><td>9.350</td><td></td></tr><tr><td>(Si<sub>1.99</sub>Al<sub>0.01</sub>)(Mg<sub>2.57</sub>Fe<sup>2+0.24</sup>Fe<sup>3+0.11</sup>Al<sub>0.09</sub>)</td><td>Natural n°17</td><td>0.717</td><td>9.350</td><td></td></tr><tr><td>Si<sub>2.00</sub> (Mg<sub>2.55</sub>Fe<sup>2+0.25</sup>Fe<sup>3+0.12</sup>Al<sub>0.03</sub>)</td><td>Natural n°18</td><td>0.720</td><td>9.350</td><td></td></tr><tr><td>(Si<sub>1.94</sub>Al<sub>0.06</sub>)(Mg<sub>2.58</sub>Fe<sup>2+0.07</sup>Fe<sup>3+0.35</sup>Al<sub>0.01</sub>)</td><td>Natural n°7</td><td>0.712</td><td>9.220</td><td></td></tr><tr><td>(Si<sub>1.95</sub>Al<sub>0.01</sub>Fe<sup>3+0.04</sup>)(Mg<sub>2.87</sub>Fe<sup>2+0.01</sup>Fe<sup>3+0.06</sup>)</td><td>Antigorite n°1</td><td>0.719</td><td>9.219</td><td>Brindley & Von Knorring (1953)</td></tr><tr><td>Si<sub>2</sub>(Mg<sub>2.72</sub>Al<sub>0.01</sub>Fe<sup>3+0.13</sup>)</td><td>Antigorite n°2</td><td>0.716</td><td>9.219</td><td></td></tr><tr><td colspan="5"><strong>Al- serpentine</strong></td></tr><tr><td colspan="5">(anhydrous composition)</td></tr><tr><td colspan="5">Berthierine</td></tr><tr><td>(Si<sub>1.32</sub>Al<sub>0.68</sub>)(Mg<sub>0.23</sub>Fe<sup>2+1.82</sup>Fe<sup>3+0.01</sup>Al<sub>0.83</sub>)</td><td>chamosite<sup>£</sup></td><td>0.705</td><td>9.360</td><td>Brindley & Youell (1953) <sup>£</sup>actually berthierine</td></tr><tr><td>(Si<sub>1.29</sub>Al<sub>0.71</sub>)(Mg<sub>0.17</sub>Fe<sup>2+1.81</sup>Fe<sup>3+0.02</sup>Al<sub>0.90</sub>)<sup>a</sup></td><td>n°874<sup>£</sup></td><td>0.700</td><td>9.312<sup>b</sup></td><td><sup>a</sup>Brindley (1982) named chamosite at this time</td></tr><tr><td>(Si<sub>1.22</sub>Al<sub>0.78</sub>)(Mg<sub>0.17</sub>Fe<sup>2+1.79</sup>Fe<sup>3+0.01</sup>Al<sub>0.93</sub>)<sup>a</sup></td><td>Wabana<sup>£</sup></td><td>0.697</td><td>9.348<sup>b</sup></td><td><sup>b</sup>Brindley et al. (1951)</td></tr><tr><td>(Si<sub>1.46</sub>Al<sub>0.54</sub>)(Mg<sub>0.4</sub>Fe<sup>2+1.72</sup>Fe<sup>3+0.32</sup>Al<sub>0.45</sub>)<sup>c</sup></td><td>Frodingham<sup>£</sup></td><td>0.720</td><td>9.342<sup>b</sup></td><td><sup>c</sup>calculated from chemical analyses in <sup>b</sup></td></tr><tr><td>(Si<sub>1.53</sub>Al<sub>0.47</sub>)(Mg<sub>0.38</sub>Fe<sup>2+1.64</sup>Fe<sup>3+0.29</sup>Al<sub>0.52</sub>)<sup>c</sup></td><td>Schmiedefeld<sup>£</sup></td><td>0.714</td><td>9.336<sup>b</sup></td><td></td></tr><tr><td>(Si<sub>1.29</sub>Al<sub>0.71</sub>)(Mg<sub>0.46</sub>Fe<sup>2+1.13</sup>Ti<sub>0.77</sub>Al<sub>0.12</sub>)</td><td>Ti-berthierine</td><td>0.703</td><td>9.252</td><td>Arima et al. (1985)</td></tr><tr><td colspan="5">Amesite</td></tr><tr><td>(Si<sub>1.052</sub>Al<sub>0.948</sub>)(Mg<sub>1.15</sub>Fe<sup>2+0.96</sup>Al<sub>0.99</sub>Mn<sub>0.02</sub>)</td><td>amesite Lake Asbestos</td><td>0.679</td><td>9.294</td><td>Taner & Laurent (1984)</td></tr></tbody></table>
<table><tbody><tr><td>(Si<sub>1.01</sub>Al<sub>0.99</sub>)(Mg<sub>1.63</sub>Fe<sup>2+0.33</sup>Al<sub>0.999</sub>)</td><td>amesite Chester</td><td>0.664</td><td>9.186</td><td>Anderson &amp; Bailey (1981)</td><td></td></tr><tr><td>(Si<sub>1.027</sub>Al<sub>0.973</sub>)(Mg<sub>1.94</sub>Fe<sup>2+0.03</sup>Cr<sub>0.07</sub>Al<sub>0.94</sub>)</td><td>amesite</td><td>0.660</td><td>9.195</td><td>Anderson &amp; Bailey (1981)</td><td></td></tr><tr><td>(Si<sub>1.075</sub>Al<sub>0.925</sub>)(Mg<sub>1.9</sub>Fe<sup>2+0.025</sup>Ni<sub>0.01</sub>Al<sub>0.875</sub>Cr<sub>0.145</sub>)</td><td>amesite</td><td>0.660</td><td>9.212<sup>d</sup></td><td>Wiewiora et al. (1991)</td><td><sup>d</sup> single crystal X-ray analysis</td></tr><tr><td>Others<br/>(Si<sub>1.83</sub>Al<sub>0.17</sub>)(Mg<sub>2.79</sub>Fe<sup>2+0.04</sup>Fe<sup>3+0.1</sup>Al<sub>0.07</sub>)</td><td>lizardite Val Sissone</td><td>0.714</td><td>9.235<sup>e</sup></td><td>Mellini (1982)</td><td><sup>e</sup> crystal structure<br/>refinement</td></tr><tr><td>(Si<sub>1.81</sub>Al<sub>0.19</sub>)(Mg<sub>2.64</sub>Fe<sup>2+0.05</sup>Fe<sup>3+0.13</sup>Al<sub>0.03</sub>)</td><td>Thompson Lake</td><td>0.719</td><td>9.239</td><td>Olsen (1961)</td><td></td></tr><tr><td>(Si<sub>1.48</sub>Al<sub>0.52</sub>)(Mg<sub>2.07</sub>Fe<sup>2+0.07</sup>Al<sub>0.72</sub>)</td><td>Al-serpentine</td><td>0.675</td><td>9.171</td><td>Jahanbagloo &amp; Zoltai (1968)</td><td></td></tr><tr><td>(Si<sub>1.67</sub>Al<sub>0.33</sub>)(Mg<sub>0.27</sub>Fe<sup>2+0.16</sup>Ni<sub>1.36</sub>Al<sub>0.92</sub>)</td><td>brindleyite</td><td>0.623</td><td>9.133</td><td>Maksimovic &amp; Bish (1978)</td><td></td></tr><tr><td>(Si<sub>1.79</sub>Al<sub>0.21</sub>)(Mg<sub>0.77</sub>Fe<sup>2+0.28</sup>Fe<sup>3+0.78</sup>Al<sub>0.56</sub> Mn<sub>0.15</sub>)</td><td>odinite</td><td>0.660</td><td>9.334<br/>9.326</td><td>Bailey (1988)</td><td>purest sample - mixture<br/>of 1T et 1M polyptypes</td></tr><tr><td>(Si<sub>0.98</sub>Al<sub>1.02</sub>) (Mg<sub>0.245</sub>Mn<sub>1.825</sub>Fe<sup>3+0.09</sup>Al<sub>0.84</sub>)</td><td>kellyite</td><td>0.733</td><td>9.420</td><td>Peacor et al. (1974)</td><td></td></tr><tr><td colspan="6"><strong>Fe<sup>3+</sup>- serpentine</strong></td></tr><tr><td colspan="6">(anhydrous composition)</td></tr><tr><td colspan="6">Pecoraite<br/>(Si<sub>1.88</sub>Fe<sup>3+0.15</sup>)(Mg<sub>0.08</sub>Ni<sub>2.93</sub>)</td></tr><tr><td colspan="6">Cronstedtite<br/>(Si<sub>1.51</sub>Fe<sup>3+0.49</sup>) (Fe<sup>2+1.64</sup>Fe<sup>3+0.49</sup>Mg<sub>0.71</sub>Mn<sub>0.16</sub>)</td></tr><tr><td>(Si<sub>1.22</sub>Fe<sup>3+0.78</sup>) (Fe<sup>2+2.2</sup> Fe<sup>3+0.8</sup> Al<sub>0.02</sub>)</td><td>Sterling Mine, USA</td><td>0.691</td><td>9.180</td><td>Robinson &amp; Chamberlain (1984)</td><td></td></tr><tr><td>(Si<sub>1.34</sub>Fe<sup>3+0.66</sup>) (Fe<sup>2+2.32</sup> Fe<sup>3+0.68</sup> Al<sub>0.02</sub>)</td><td>Pribram, Czech Republik</td><td>0.747</td><td>9.467<sup>§</sup></td><td>Geiger et al. (1983)<br/>Hybler et al. (2000)</td><td><sup>§</sup> crystal structure refined</td></tr><tr><td>(Si<sub>1.249</sub>Fe<sup>3+0.751</sup>) (Fe<sup>2+2.245</sup>Fe<sup>3+0.755</sup>)</td><td>Herja, Romania</td><td>0.743</td><td>9.547<sup>§</sup></td><td></td><td></td></tr><tr><td>(Si<sub>1.271</sub>Fe<sup>3+0.729</sup>) (Fe<sup>2+2.271</sup>Fe<sup>3+0.729</sup>)</td><td>Lostwithi, England</td><td>0.749</td><td>9.532<sup>§</sup></td><td></td><td></td></tr><tr><td>(Si<sub>1.228</sub>Fe<sup>3+0.772</sup>) (Fe<sup>2+2.228</sup>Fe<sup>3+0.772</sup>)</td><td>Pohled, Czech Republik<br/>2H<sub>1</sub> (+2H<sub>2</sub>)</td><td>0.746<sup>#</sup></td><td>9.516<sup>#§</sup></td><td>Hybler et al. (2016)</td><td>#average values</td></tr><tr><td>(Si<sub>1.575</sub>Fe<sup>3+0.485</sup>) (Fe<sup>2+2.515</sup>Fe<sup>3+0.485</sup>)</td><td>6T<sub>2</sub></td><td>0.747<sup>#</sup></td><td>9.516<sup>#§</sup></td><td></td><td></td></tr><tr><td>(Si<sub>1.182</sub>Fe<sup>3+0.818</sup>) (Fe<sup>2+2.182</sup>Fe<sup>3+0.818</sup>)</td><td>3T + 1M</td><td>0.745</td><td>9.514<sup>§</sup></td><td>Hybler (2016)</td><td></td></tr><tr><td></td><td>Pohled, Czech Republik<br/>6T<sub>2</sub></td><td>0.758</td><td>9.522<sup>§</sup></td><td>Hybler et al. (2017)</td><td>#average values</td></tr><tr><td></td><td>Nižná Slaná, Slovakia<br/>3T</td><td>0.743<sup>#</sup></td><td>9.521<sup>#§</sup></td><td></td><td></td></tr></tbody></table>
<table><tbody><tr><td>(Si<sub>1.197</sub>Fe<sup>3+</sup><sub>0.803</sub>) (Fe<sup>2+</sup><sub>2.197</sub>Fe<sup>3+</sup><sub>0.803</sub>)<br>(Si<sub>1.206</sub>Fe<sup>3+</sup><sub>0.794</sub>) (Fe<sup>2+</sup><sub>2.206</sub>Fe<sup>3+</sup><sub>0.794</sub>)</td><td>3T + 1M</td><td>0.744<sup>#</sup></td><td>9.527<sup>#§</sup></td><td></td></tr><tr><td></td><td>2H<sub>1</sub></td><td>0.744<sup>#</sup></td><td>9.532<sup>#§</sup></td><td>Hybler &amp; Sejkora (2017)</td></tr><tr><td>(Si<sub>1.206</sub>Fe<sup>3+</sup><sub>0.794</sub>) (Fe<sup>2+</sup><sub>2.047</sub>Fe<sup>3+</sup><sub>0.794</sub>Mg<sub>0.159</sub>)<br>(Si<sub>1.185</sub>Fe<sup>3+</sup><sub>0.815</sub>) (Fe<sup>2+</sup><sub>2.030</sub>Fe<sup>3+</sup><sub>0.815</sub>Mg<sub>0.155</sub>)<br>(Si<sub>1.236</sub>Fe<sup>3+</sup><sub>0.764</sub>) (Fe<sup>2+</sup><sub>2.034</sub>Fe<sup>3+</sup><sub>0.764</sub>Mg<sub>0.202</sub>)<br>(Si<sub>1.371</sub>Fe<sup>3+</sup><sub>0.629</sub>) (Fe<sup>2+</sup><sub>2.148</sub>Fe<sup>3+</sup><sub>0.629</sub>Mg<sub>0.223</sub>)<br>(Si<sub>1.387</sub>Fe<sup>3+</sup><sub>0.613</sub>) (Fe<sup>2+</sup><sub>2.151</sub>Fe<sup>3+</sup><sub>0.613</sub>Mg<sub>0.236</sub>)</td><td>Chyňava, Czech Republic<br>2H<sub>1</sub><br>2H<sub>1</sub> (+2H<sub>2</sub>)<br>3T<br>1T + 3T<br>1T</td><td>0.741<sup>#</sup><br>0.740<sup>#</sup><br>0.742<sup>#</sup><br>0.747<sup>#</sup><br>0.748<sup>#</sup></td><td>9.527<sup>#§</sup><br>9.522<sup>#§</sup><br>9.518<sup>#§</sup><br>9.513<sup>#§</sup><br>9.521<sup>#§</sup></td><td>#average values</td></tr><tr><td>(Si<sub>1.19</sub>Fe<sup>3+</sup><sub>0.81</sub>) (Fe<sup>2+</sup><sub>2.19</sub>Fe<sup>3+</sup><sub>0.80</sub>Mg<sub>0.002</sub>)<br>(Si<sub>1.22</sub>Fe<sup>3+</sup><sub>0.78</sub>) (Fe<sup>2+</sup><sub>1.80</sub>Fe<sup>3+</sup><sub>0.78</sub>Mg<sub>0.02</sub>Mn<sub>0.41</sub>)<br>(Si<sub>1.24</sub>Fe<sup>3+</sup><sub>0.76</sub>) (Fe<sup>2+</sup><sub>1.86</sub>Fe<sup>3+</sup><sub>0.76</sub>Mg<sub>0.31</sub>Mn<sub>0.066</sub>)<br>Guidottite</td><td>Nagybörzsöny, Hungary<br>Litošice, Czech Republic<br>1T<br>2H<sub>1</sub> + 2H<sub>2</sub></td><td>0.746<sup>#</sup><br>0.751<sup>#</sup><br>0.741</td><td>9.547<sup>#§</sup><br>9.572<sup>#§</sup><br>9.540<sup>#§</sup></td><td>Hybler et al. (2020)<br>Hybler et al. (2021)</td></tr><tr><td>(Mn<sub>1.86</sub>Fe<sup>3+</sup><sub>0.61</sub>Mg<sub>0.54</sub>) (Si<sub>1.36</sub>Fe<sup>3+</sup><sub>0.64</sub>)<br>(Mn<sub>1.70</sub>Fe<sup>3+</sup><sub>0.96</sub>Mg<sub>0.24</sub>) (Si<sub>1.26</sub>Fe<sup>3+</sup><sub>0.74</sub>)</td><td>Republic of South Africa</td><td>0.773<br>0.760</td><td>9.608<br>9.608</td><td>Wahle et al. (2010)</td></tr><tr><td colspan="5"><strong>Synthetic serpentine series</strong><br>(Si<sub>2-x</sub>Al<sub>x</sub>)(Mg<sub>3-x</sub>Al<sub>x</sub>)O<sub>5</sub>(OH)<sub>4</sub></td></tr><tr><td>(Si<sub>2</sub>)(Mg<sub>3</sub>)<br>(Si<sub>1.95</sub>Al<sub>0.05</sub>)(Mg<sub>2.95</sub>Al<sub>0.05</sub>)<br>(Si<sub>1.925</sub>Al<sub>0.075</sub>)(Mg<sub>2.925</sub>Al<sub>0.075</sub>)<br>(Si<sub>1.9</sub>Al<sub>0.1</sub>)(Mg<sub>2.9</sub>Al<sub>0.1</sub>)<br>(Si<sub>1.875</sub>Al<sub>0.125</sub>)(Mg<sub>2.875</sub>Al<sub>0.125</sub>)<br>(Si<sub>1.625</sub>Al<sub>0.375</sub>)(Mg<sub>2.625</sub>Al<sub>0.375</sub>)<br>(Si<sub>1.625</sub>Al<sub>0.375</sub>)(Mg<sub>2.625</sub>Al<sub>0.375</sub>)<br>(Si<sub>1.5</sub>Al<sub>0.5</sub>)(Mg<sub>2.5</sub>Al<sub>0.5</sub>)<br>(Si<sub>1.5</sub>Al<sub>0.5</sub>)(Mg<sub>2.5</sub>Al<sub>0.5</sub>)</td><td>241M<br>75G<br>73G<br>72G 87G<br>70G<br>349M<br>368M<br>366M<br>391M</td><td>0.720<br>0.717<br>0.715<br>0.714<br>0.712<br>0.697<br>0.697<br>0.689<br>0.689</td><td>9.204<br>9.222<br>9.204<br>9.219<br>9.207<br>9.210<br>9.204<br>9.210<br>9.200</td><td>Chernosky (1975)</td></tr></tbody></table>
<table><tbody><tr><td>(Si<sub>1.25</sub>Al<sub>0.75</sub>)(Mg<sub>2.25</sub>Al<sub>0.75</sub>)</td><td>390M</td><td>0.674</td><td>9.175</td></tr><tr><td>(Si<sub>1</sub>Al<sub>1</sub>)(Mg<sub>2</sub>Al<sub>1</sub>)</td><td>367M</td><td>0.658</td><td>9.148</td></tr><tr><td>(Si<sub>1.625</sub>Al<sub>0.375</sub>)(Mg<sub>2.625</sub>Al<sub>0.375</sub>)</td><td>1-Layer ortho serpentine</td><td>0.697</td><td>9.245</td><td>Gillery (1959)</td></tr><tr><td>(Si<sub>1.25</sub>Al<sub>0.75</sub>)(Mg<sub>2.25</sub>Al<sub>0.75</sub>)</td><td>6-Layer ortho serpentine</td><td>0.674</td><td>9.193</td></tr><tr><td>(Si<sub>1.75</sub>Al<sub>0.25</sub>) (Mg<sub>2.75</sub>Al<sub>0.25</sub>)</td><td>Lizardite</td><td>0.705</td><td>9.229</td><td>Caruso & Chernosky (1979)</td></tr><tr><td>(Si<sub>2-x</sub>Al<sub>x</sub>)(R<sup>2+y</sup>Al<sub>z</sub>)O<sub>5</sub>(OH)<sub>4</sub></td><td></td><td></td><td></td><td></td></tr><tr><td>(Si<sub>1.78</sub>Al<sub>0.22</sub>)(Ni<sub>1.62</sub>Fe<sup>3+0.05</sup>Al<sub>0.96</sub>)</td><td>Al-Ni lizardite</td><td>0.633</td><td>9.162</td><td>Bentabol et al. (2013)</td></tr><tr><td>(Si<sub>1.81</sub>Al<sub>0.19</sub>)(Co<sub>1.73</sub>Fe<sup>3+0.05</sup>Al<sub>0.88</sub>)</td><td>Al-Co lizardite</td><td>0.673</td><td>9.234</td></tr><tr><td>Si<sub>2.02</sub>(Co<sub>1.58</sub>Fe<sup>3+0.04</sup>Al<sub>0.89</sub>)</td><td>Al-Co lizardite</td><td>0.669</td><td>9.155</td></tr><tr><td>Synthetic serpentine<br>(anhydrous composition)</td><td></td><td></td><td></td><td></td></tr><tr><td>(Si<sub>1.74</sub>Al<sub>0.26</sub>) (Mg<sub>2.00</sub> Fe<sup>3+0.02</sup>Al<sub>0.73</sub>)</td><td>Al-Mg lizardite</td><td>0.670</td><td>9.203</td><td>Bentabol et al. (2010)</td></tr></tbody></table>

<table><tbody><tr><td><strong>Fe- Mn- serpentine</strong> (anhydrous composition)</td><td></td><td></td><td></td><td></td><td>Corrugated structures</td></tr><tr><td>Si<sub>2</sub>(Fe<sup>2+</sup>)<sub>3</sub></td><td>synthetic greenalite</td><td>0.780</td><td>9.624</td><td>Jasmund et al. (1975)</td><td></td></tr><tr><td>Si<sub>2</sub> (Fe<sup>2+</sup><sub>2.25</sub>Fe<sup>3+</sup><sub>0.5</sub>)</td><td>greenalite</td><td>0.755</td><td>9.612</td><td>Steadman & Youell (1958)</td><td></td></tr><tr><td>(Si<sub>1.51</sub>Fe<sup>3+</sup><sub>0.49</sub>) (Fe<sup>2+</sup><sub>1.64</sub>Fe<sup>3+</sup><sub>0.49</sub>Mg<sub>0.71</sub>Mn<sub>0.16</sub>)</td><td>greenalite</td><td>0.747</td><td>9.467</td><td>Geiger et al. (1983)</td><td></td></tr><tr><td>(Si<sub>1.95</sub>Al<sub>0.05</sub>) (Mg<sub>0.18</sub>Fe<sup>2+</sup><sub>1.71</sub>Mn<sub>0.49</sub>Al<sub>0.27</sub>Fe<sup>3+</sup><sub>0.18</sub>)</td><td>greenalite</td><td>0.753</td><td>9.63</td><td>Bayliss (1981)</td><td></td></tr><tr><td>(Si<sub>1.77</sub>Al<sub>0.23</sub>) (Mg<sub>1.47</sub>Fe<sup>2+</sup><sub>0.44</sub>Mn<sub>0.6</sub>Al<sub>0.2</sub>Fe<sup>3+</sup><sub>0.03</sub>Zn<sub>0.27</sub>)</td><td>baumite</td><td>0.739<sup>a</sup></td><td>9.6<sup>b</sup></td><td><sup>a</sup>Frondel & Ito (1975)<br><sup>b</sup>Guggenheim & Bailey (1989)</td><td></td></tr><tr><td>Si<sub>2</sub> (Mg<sub>0.35</sub>Fe<sup>2+</sup><sub>0.05</sub>Mn<sub>2.47</sub>Al<sub>0.13</sub>)</td><td>Mn-serpentine<sup>#</sup></td><td>0.804</td><td>9.804</td><td>Yoshimura et al. (1958)</td><td><sup>#</sup>caryopilite</td></tr><tr><td>Si<sub>2</sub> (Mg<sub>0.29</sub>Fe<sup>2+</sup><sub>0.16</sub>Mn<sub>1.83</sub>Zn<sub>0.11</sub>)</td><td>Mn-serpentine<sup>#</sup></td><td>0.809</td><td>9.834</td><td>Kato (1963)</td><td></td></tr></tbody></table>
<table><caption>Table 4: Data used for TOT phyllosilicates with neutral structure. *R*: mean ionic radius of octahedral cations (Å) (see text); *b*: crystallographic parameter (Å). *Sample reference in the paper.*</caption><tr><td>Si<sub>2</sub> (Mg<sub>0.4</sub>Fe<sup>3+</sup><sub>0.06</sub>Mn<sub>2.17</sub>)</td><td>Mn-serpentine<sup>#</sup></td><td>0.797</td><td>9.804</td><td>Kato (1963)</td></tr><tr><td>Si<sub>2</sub> (Mg<sub>0.6</sub>Fe<sup>2+</sup><sub>0.27</sub>Mn<sub>1.76</sub>)</td><td>Mn-serpentine<sup>#</sup></td><td>0.800</td><td>9.708</td><td>Kato (1963)</td></tr><tr><td>Si<sub>2</sub> (Mg<sub>0.34</sub>Fe<sup>2+</sup><sub>0.18</sub>Mn<sub>1.76</sub>Al<sub>0.07</sub>)</td><td>Mn-serpentine<sup>#</sup></td><td>0.802</td><td>9.852</td><td>Kato (1963)</td></tr></table>

<table><thead><tr><th>TOT neutral structure<br>(anhydrous composition)</th><th>Sample*</th><th>R</th><th>b</th><th>References</th><th>Comments</th></tr></thead><tbody><tr><td><strong>Pyrophyllite</strong></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Si<sub>4</sub> Al<sub>2</sub></td><td>pyrophyllite</td><td>0.535</td><td>8.966<sup>$</sup></td><td>Drits et al. (2012)</td><td rowspan="4"><sup>$</sup>refined unit cell</td></tr><tr><td>(Si<sub>3.94</sub>Fe<sup>3+</sup><sub>0.06</sub>)(Mg<sub>0.1</sub>Fe<sup>3+</sup><sub>1.9</sub>)</td><td>ferripyrophyllite</td><td>0.649</td><td>9.080</td><td>Badaut et al. (1992)</td></tr><tr><td>(Si<sub>3.80</sub>Al<sub>0.13</sub>Fe<sup>3+</sup><sub>0.07</sub>)(Fe<sup>3+</sup><sub>1.96</sub>Mg<sub>0.11</sub>)Ca<sub>0.05</sub></td><td>ferripyrophyllite</td><td>0.649</td><td>9.100</td><td>Chukhrov et al. (1979)</td></tr><tr><td>(Si<sub>3.80</sub>Al<sub>0.04</sub>Fe<sup>3+</sup><sub>0.16</sub>)(Al<sub>0.09</sub>Fe<sup>3+</sup><sub>1.96</sub>Mg<sub>0.11</sub>)Ca<sub>0.05</sub></td><td>same sample</td><td>0.644</td><td></td><td>Coey et al. (1984)</td></tr><tr><td><strong>Talc</strong></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Si<sub>4</sub> Mg<sub>3</sub></td><td>talc</td><td>0.720</td><td>9.173<sup>$</sup></td><td>Drits et al. (2012)</td><td rowspan="3"><sup>$</sup>refined unit cell</td></tr><tr><td>Si<sub>4</sub> (Al<sub>0.02</sub>Fe<sup>3+</sup><sub>0.26</sub>Fe<sup>2+</sup><sub>0.78</sub>Mg<sub>1.90</sub>)</td><td>Antwerp</td><td>0.728</td><td>9.180</td><td>Robinson & Chamberlain (1984)</td></tr><tr><td>(Si<sub>3.93</sub>Al<sub>0.07</sub>) (Fe<sup>3+</sup><sub>0.1</sub>Ni<sub>2.12</sub>Mg<sub>0.81</sub>)</td><td>willemseite</td><td>0.697</td><td>9.149</td><td>De Waal (1970)</td></tr><tr><td>Si<sub>4</sub> (Al<sub>0.02</sub>Fe<sup>3+</sup><sub>0.26</sub>Fe<sup>2+</sup><sub>0.78</sub>Mg<sub>1.90</sub>)</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td><strong>Minnesotaite</strong></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Si<sub>4</sub> (Fe<sup>2+</sup><sub>2.28</sub>Mg<sub>0.72</sub>)<sup>#</sup></td><td>Mesabi range,<br>Minesota, USA</td><td>0.766</td><td>9.410</td><td>Grüner (1944)</td><td rowspan="2"><sup>#</sup> SF calculated from chemical data</td></tr><tr><td>(Si<sub>3.88</sub>Al<sub>0.17</sub>) (Fe<sup>2+</sup><sub>2.50</sub>Mg<sub>0.39</sub> Mn<sub>0.06</sub>)</td><td>Sample 1</td><td>0.773</td><td>9.419<sup>$</sup></td><td>Guggenheim & Eggleton (1986)</td></tr></tbody></table>
**Synthetic Fe²⁺-talc series**
(magnetite-iron and magnetite-wüstite buffers)

<table><tr><td>Mg₃</td><td>Fe/Fe+Mg= 0</td><td>0.720</td><td>9.156</td></tr><tr><td>Mg₂.₉₇Fe <sup>2+</sup>₀.₀₃</td><td>0.01</td><td>0.721</td><td>9.157</td></tr><tr><td>Mg₂.₉₅₅Fe <sup>2+</sup>₀.₀₄₅</td><td>0.015</td><td>0.721</td><td>9.159</td></tr><tr><td>Mg₂.₉₂₅Fe <sup>2+</sup>₀.₀₇₅</td><td>0.025</td><td>0.722</td><td>9.160</td></tr><tr><td>Mg₂.₈₉₅Fe <sup>2+</sup>₀.₁₀₅</td><td>0.035</td><td>0.722</td><td>9.161</td></tr><tr><td>Mg₂.₇₇₅Fe <sup>2+</sup>₀.₂₂₅</td><td>0.075</td><td>0.725</td><td>9.165</td></tr><tr><td>Mg₂.₄Fe <sup>2+</sup>₀.₆</td><td>0.2</td><td>0.732</td><td>9.181</td></tr></table>

**Kerolite**

<table><tr><td>Si₄ (Al₀.₀₇Fe³⁺₀.₀₂Mg₂.₈)</td><td>Sample 1</td><td>0.715</td><td>9.134</td><td>Martin de Vidales et al. (1991)</td></tr><tr><td>(Si₃.₉₆Al₀.₀₄) (Al₀.₀₇Fe³⁺₀.₀₃Mg₂.₇₂Li₀.₀₉)</td><td>P-7</td><td>0.718</td><td>9.078</td><td>Eberl et al. (1982)</td></tr><tr><td>(Si₃.₉₅Al₀.₀₅) (Al₀.₀₁₅Fe³⁺₀.₀₁₅Mg₂.₉₄₅Ti₀.₀₀₅)</td><td>SAN I-1</td><td>0.718</td><td>9.133</td><td>Pozo & Casas (1999)</td></tr></table>

**Kerolite-pimelite series**
(Brindley et al. (1979))

<table><tr><td>(Si₃.₉₄Al₀.₀₁Fe³⁺₀.₀₁) (Mg₃.₀₉Ni₀.₀₁)</td><td>1</td><td>0.720</td><td>9.132</td></tr><tr><td>(Si₃.₉₄Al₀.₀₂Fe³⁺₀.₀₃) (Mg₂.₁₆Ni₀.₈₇)</td><td>6</td><td>0.711</td><td>9.150</td></tr><tr><td>(Si₃.₉₇Al₀.₀₃) (Mg₂.₀₄Ni₀.₉₁Fe³⁺₀.₀₁)</td><td>8</td><td>0.711</td><td>9.168</td></tr><tr><td>(Si₃.₉₉Al₀.₀₁) (Mg₁.₂₂Ni₁.₇₄Fe³⁺₀.₀₂)</td><td>17</td><td>0.702</td><td>9.156</td></tr></table>

**Synthetic Ni-Mg kerolite series**
(Baron et al. (2016a) (description of samples only, SF and b values are unpublished))

<table><tr><td>Mg₃</td><td>x = 0</td><td>0.720</td><td>9.160</td></tr><tr><td>Mg₂.₃₆Ni₀.₆₄</td><td>x = 0.5</td><td>0.714</td><td>9.154</td></tr><tr><td>Mg₁.₈Ni₁.₂</td><td>x = 1</td><td>0.708</td><td>9.144</td></tr><tr><td>Mg₁.₂₈Ni₁.₇₂</td><td>x = 1.5</td><td>0.703</td><td>9.138</td></tr><tr><td>Mg₀.₈₂Ni₂.₁₈</td><td>x = 2</td><td>0.698</td><td>9.136</td></tr></table>
<table><caption>Table 5. Data used for smectites. *R*: mean ionic radius of octahedral cations (Å) (see text); *b*: crystallographic parameter (Å). *Sample reference in the paper.*</caption><tr><td>Mg<sub>0.42</sub>Ni<sub>2.58</sub></td><td>x = 2.5</td><td>0.694</td><td>9.134</td></tr><tr><td>Ni<sub>3</sub></td><td>x = 3</td><td>0.690</td><td>9.130</td></tr></table>

<table><thead><tr><th>Smectites<br>(octahedral and tetrahedral anhydrous compositions)</th><th>Sample*</th><th>R</th><th>b</th><th>References</th><th>Comments</th></tr></thead><tbody><tr><td colspan="6"><strong>Natural smectites</strong></td></tr><tr><td colspan="6"><strong>Dioctahedral smectites</strong></td></tr><tr><td>(Si<sub>3.845</sub>Al<sub>0.155</sub>)(Al<sub>1.565</sub>Fe<sup>3+</sup><sub>0.2</sub>Mg<sub>0.25</sub>)</td><td>Wyoming montmorillonite</td><td>0.569</td><td>8.988</td><td rowspan="5">Russel & Clark (1978)</td><td></td></tr><tr><td>(Si<sub>3.665</sub>Al<sub>0.335</sub>)(Al<sub>1.755</sub>Mg<sub>0.255</sub>)</td><td>Unterrupsroth montmorillonite</td><td>0.558</td><td>8.976</td><td></td></tr><tr><td>(Si<sub>3.995</sub>Al<sub>0.005</sub>)(Al<sub>1.36</sub>Fe<sup>3+</sup><sub>0.06</sub>Mg<sub>0.60</sub>)</td><td>Otay montmorillonite</td><td>0.593</td><td>8.994</td><td></td></tr><tr><td>(Si<sub>3.82</sub>Al<sub>0.18</sub>)(Al<sub>1.27</sub>Fe<sup>3+</sup><sub>0.42</sub>Mg<sub>0.37</sub>)</td><td>Woburn montmorillonite</td><td>0.591</td><td>9.024</td><td></td></tr><tr><td>(Si<sub>3.105</sub>Al<sub>0.07</sub>Fe<sup>3+</sup><sub>0.82</sub>)(Fe<sup>3+</sup><sub>2.02</sub>Mg<sub>0.1</sub>)</td><td>California nontronite</td><td>0.649</td><td>9.210</td><td></td></tr><tr><td>(Si<sub>3.65</sub>Al<sub>0.35</sub>)(Al<sub>0.53</sub>Fe<sup>3+</sup><sub>1.37</sub>Mg<sub>0.13</sub>)</td><td>Washington nontronite</td><td>0.621</td><td>9.072</td><td></td><td></td></tr><tr><td>(Si<sub>3.67</sub>Al<sub>0.05</sub>Fe<sup>3+</sup><sub>0.28</sub>)(Fe<sup>3+</sup><sub>1.95</sub>Mg<sub>0.05</sub>)</td><td>El Pao nontronite</td><td>0.647</td><td>9.162</td><td></td><td></td></tr><tr><td>(Si<sub>3.41</sub>Al<sub>0.47</sub>Fe<sup>3+</sup><sub>0.12</sub>)(Fe<sup>3+</sup><sub>2</sub>Mg<sub>0.02</sub>)</td><td>Pfaffenreuth nontronite</td><td>0.646</td><td>9.144</td><td></td><td></td></tr></tbody></table>
(Si3.42Al0.525Fe3+0.055)(Fe3+1.98Mg0.02) Garfield nontronite 0.646 9.138

Dioctahedral smectites Brigatti (1983)

<table><tr><td>(Si3.98Al0.02)(Al0.15Fe3+1.45Mg0.39)</td><td>1</td><td>0.651</td><td>9.085</td></tr><tr><td>Si4.0(Al0.4Fe3+1.31Mg0.25)</td><td>2</td><td>0.632</td><td>9.070</td></tr><tr><td>(Si3.98Al0.02)(Al0.6Fe3+1.06Mg0.39)</td><td>3</td><td>0.627</td><td>9.030</td></tr><tr><td>(Si3.65Al0.35)(Al0.68Fe3+0.87Mg0.48)</td><td>4</td><td>0.626</td><td>9.005</td></tr><tr><td>(Si3.77Al0.23)(Al0.99Fe3+0.78Mg0.24)</td><td>5</td><td>0.600</td><td>8.993</td></tr><tr><td>(Si3.56Al0.44)(Al0.9Fe3+0.72Mg0.55)</td><td>6</td><td>0.618</td><td>8.978</td></tr><tr><td>(Si3.36Al0.64))(Al0.75Fe3+0.71Mg0.81)</td><td>7</td><td>0.635</td><td>9.015</td></tr><tr><td>(Si3.25Al0.75))(Al0.95Fe3+0.7Mg0.59)</td><td>8</td><td>0.618</td><td>9.020</td></tr><tr><td>(Si3.84Al0.16)(Al1.12Fe3+0.57Mg0.35)</td><td>9</td><td>0.597</td><td>8.965</td></tr><tr><td>(Si3.55Al0.45)(Al0.87Fe3+0.53Mg0.82)</td><td>10</td><td>0.630</td><td>8.952</td></tr><tr><td>(Si3.41Al0.59)(Al1.4Fe3+0.46Mg0.39)</td><td>11</td><td>0.590</td><td>8.942</td></tr><tr><td>(Si3.75Al0.25)(Al1.44Fe3+0.35Mg0.31)</td><td>12</td><td>0.581</td><td>8.944</td></tr><tr><td>(Si3.82Al0.18)(Al1.35Fe3+0.31Mg0.45)</td><td>13</td><td>0.591</td><td>8.940</td></tr><tr><td>(Si3.87Al0.13)(Al1.38Fe3+0.25Mg0.4)</td><td>14</td><td>0.585</td><td>8.942</td></tr><tr><td>(Si3.89Al0.11)(Al1.52Fe3+0.17Mg0.32)</td><td>15</td><td>0.574</td><td>8.945</td></tr></table>

Dioctahedral smectites Tsipursky & Drits (1984)

<table><tr><td>(Si3.95Al0.05)(Al1.38Fe3+0.18Mg0.44)</td><td>1 cv#</td><td>0.586</td><td>8.97</td></tr><tr><td>(Si3.96Al0.04)(Al1.54Fe3+0.18Mg0.26)</td><td>2 tv-cv</td><td>0.569</td><td>8.98</td></tr><tr><td>(Si3.98Al0.02)(Al1.38Fe3+0.14Mg0.48)</td><td>3 tv-cv</td><td>0.587</td><td>8.97</td></tr><tr><td>(Si3.91Al0.09)(Al1.36Fe3+0.41Mg0.24)</td><td>4 tv</td><td>0.580</td><td>8.98</td></tr><tr><td>Si4 (Al1.51Fe3+0.10Mg0.39)</td><td>5 cv</td><td>0.577</td><td>8.98</td></tr><tr><td>Si4 (Al1.40Fe3+0.26Mg0.34)</td><td>6 tv</td><td>0.581</td><td>9.00</td></tr><tr><td>(Si3.98Al0.02)(Al1.32Fe3+0.26Mg0.41)</td><td>7 tv</td><td>0.587</td><td>9.00</td></tr><tr><td>Si4 (Al1.39Fe3+0.31Mg0.30)</td><td>8 tv</td><td>0.580</td><td>8.97</td></tr><tr><td>(Si3.83Al0.17)(Al1.47Fe3+0.19Mg0.34)</td><td>9 cv</td><td>0.577</td><td>8.98</td></tr><tr><td>(Si3.89Al0.11)(Al0.89Fe3+0.62Fe2+0.03Mg0.46)</td><td>10 tv-cv</td><td>0.615</td><td>8.98</td></tr></table>

#cv, tv: cis, trans octahedral vacant site

(Drits et al., 2006)
<table><tr><td>Si4 (Al0.2Fe3+1.51Mg0.29)</td><td>11 tv</td><td>0.645</td><td>9.06</td></tr><tr><td>(Si3.71Al0.29)(Al1.64Fe3+0.05Fe2+0.01Mg0.31)</td><td>12 tv tv-cv</td><td>0.567</td><td>8.98</td></tr><tr><td>(Si3.73Al0.27)(Al1.05Fe3+0.37Mg0.57)</td><td>13 tv-cv</td><td>0.608</td><td>8.97</td></tr><tr><td>(Si3.86Al0.14)(Al1.68Mg0.32)</td><td>14 cv</td><td>0.565</td><td>8.98</td></tr><tr><td>(Si3.41Al0.59)(Al1.57Fe3+0.37Fe2+0.01Mg0.05)</td><td>15 tv-cv</td><td>0.561</td><td>8.98</td></tr><tr><td>(Si3.53Al0.47)(Al0.96Fe3+0.88Fe2+0.02Mg0.26)</td><td>16 tv</td><td>0.606</td><td>9.01</td></tr><tr><td>(Si3.45Al0.55)(Al0.33Fe3+1.59Mg0.08)</td><td>17 tv</td><td>0.630</td><td>9.12</td></tr><tr><td>(Si3.49Al0.51)(Fe3+1.87Fe2+0.17)</td><td>18 tv</td><td>0.656</td><td>9.17</td></tr><tr><td>(Si3.65Al0.35)(Fe3+1.92Mg0.08)</td><td>19 tv</td><td>0.648</td><td>9.12</td></tr><tr><td>(Si3.46Al0.54)(Al0.16Fe3+1.85Mg0.04)</td><td>20 tv</td><td>0.638</td><td>9.14</td></tr></table>

<table><caption>Dioctahedral smectites</caption><tbody><tr><td>(Si3.78Al0.22)(Al1.55Fe3+0.25Mg0.2)</td><td>BeC</td><td>0.567</td><td>9.010</td></tr><tr><td>(Si3.89Al0.11)(Al1.43Fe3+0.28Mg0.29)</td><td>BeD</td><td>0.577</td><td>9.026</td></tr><tr><td>(Si3.88Al0.12)(Al1.40Fe3+0.27Mg0.23)</td><td>BeE</td><td>0.573</td><td>9.037</td></tr><tr><td>(Si3.60Al0.40)(Al1.15Fe3+0.74Mg0.11)</td><td>BeH</td><td>0.586</td><td>9.064</td></tr><tr><td>(Si3.92Al0.08)(Al1.55Fe3+0.19Mg0.26)</td><td>BeW</td><td>0.570</td><td>9.030</td></tr><tr><td>(Si3.69Al0.31)(Al1.61Fe3+0.09Mg0.30)</td><td>FR 10-0382</td><td>0.568</td><td>9.013</td></tr><tr><td>(Si3.79Al0.21)(Al1.68Fe3+0.11Mg0.21)</td><td>FR10-0532</td><td>0.560</td><td>9.017</td></tr><tr><td>(Si3.85Al0.15)(Al1.24Fe3+0.48Mg0.28)</td><td>FR11-0229</td><td>0.587</td><td>9.053</td></tr><tr><td>(Si3.69Al0.31)(Al1.47Fe3+0.35Mg0.18)</td><td>Cameron</td><td>0.571</td><td>9.041</td></tr><tr><td>(Si3.56Al0.44)(Al0.74Fe3+1.25Mg0.01)</td><td>Cheney</td><td>0.605</td><td>9.145</td></tr></tbody></table>

Heuser *et al.* (2013)

b measured by Rietveld

<table><caption>Iron-rich smectites</caption><tbody><tr><td>(Si3.68Al0.32)(Al1.24Fe3+0.6Fe2+0.05Mg0.19)</td><td>Oberpullendorf</td><td>0.590</td><td>8.997</td></tr><tr><td>(Si3.86Al0.14)(Al1.4Fe3+0.35Fe2+0.02Mg0.26)</td><td>Sauteloup</td><td>0.580</td><td>8.968</td></tr><tr><td>(Si3.67Al0.26Fe3+0.07)(Fe3+1.91Fe2+0.08Mg0.03)</td><td>Hoher Hagen nontronite</td><td>0.651</td><td>9.151</td></tr><tr><td>(Si3.49Al0.51)(Al0.21Fe3+1.69Fe2+0.1Mg0.05)</td><td>Manito nontronite</td><td>0.642</td><td>9.125</td></tr><tr><td>(Si3.92Al0.08)(Al0.37Fe3+0.98Fe2+0.06Cr0.03Ni0.02Mg0.71)</td><td>Ölberg</td><td>0.655</td><td>9.040</td></tr></tbody></table>

Köster *et al.* (1999)

Other nontronites
(Si 3.73 Al0.27) (Al0.15Fe3+1.68Mg0.14)
(Si3.59Al0.41)(Al0.39Fe3+1.53Mg0.08Cu0.02)

## Beidellites

(Si3.6Al0.4)(Al1.96Fe3+0.05Mg0.02)
(Si3.7Al0.3)(Al1.84Fe3+0.08Mg0.11)
(Si3.64Al0.36)(Al1.9Fe3+0.09Mg0.04)
(Si3.46Al0.54)(Al1.96Fe3+0.04Mg0.02)

## Other natural smectites

### Al-rich dioctahedral smectites

Si4 (Al1.46Fe3+0.06Mg0.49)
(Si3.80Al0.20)(Al1.55Fe3+0.21Mg0.23)
(Si3.78Al0.22)(Al1.51Fe3+0.27Mg0.23)
(Si3.86Al0.12Fe3+0.02)(Al1.58Fe3+0.18Mg0.25)
Si4 (Al1.47 Fe3+0.06Mg0.49)
(Si3.91Al0.09)(Al1.46Fe3+0.18Mg0.31)
(Si3.88Al0.08Fe3+0.04)(Al1.42Fe3+0.19Mg0.41)
Si4 (Al1.28Fe3+0.06Mg0.71)
(Si3.80Al0.20)(Al1.51Fe3+0.31Mg0.20)
(Si3.85Al0.15)(Al1.37Fe3+0.19Mg0.47)
(Si3.90Al0.10)(Al1.55Fe3+0.20Mg0.25)
(Si3.91Al0.09)(Al1.57Fe3+0.18 Fe2+0.02Mg0.23)
(Si3.89Al0.11)(Al1.45Fe3+0.16 Fe2+0.01Mg0.44)
(Si3.97Al0.03)(Al1.55Fe3+0.06Mg0.39)
(Si3.99Al0.01)(Al1.57Fe3+0.12Mg0.30)
Si4 (Al1.45Mg0.58Li0.16)
(Si3.74Al0.26)(Al1.77Fe3+0.03Mg0.20)
(Si3.46Al0.54)(Al1.96Fe3+0.04)
(Si3.48Al0.52)(Al1.98Fe3+0.02Mg0.01)

Tyrrhenian Sea 0.642 9.110 Dekov et al. (2007)
Serra Dos Carajas, Brazil 0.628 9.108 Petit et al. (1992)

Idawa Mine 0.540 8.964 Post et al. (1997)
DeLamar Mine 0.549 8.946
Blain tunnel 0.544 8.958
Black Jack Mine 0.539 8.988

Santa Rita 0.583 8.993
Belle Fourche 0.568 8.993
Merritt 0.571 9.000
Clay Spur 0.568 9.001
Polkville 0.583 9.002
Amory 0.575 9.004
Plymouth 0.583 9.011
Otay 0.602 9.014
Little Rock 0.570 8.996
Chambers 0.588 9.004
Upton 0.569 8.997
Belle Fourche 0.569 8.988
Lemon 0.584 9.019
Rideout 0.574 8.994
San Antonio 0.570 8.997
Honeycomb 0.600 8.979
Unter-Rupsroth 0.555 9.000
Black Jack 0.537 8.940
Black Jack 0.537 8.978

Radoslovich (1962)
Nontronites

<table><tr><td>(Si<sub>3.5</sub>Al<sub>0.5</sub>)(Al<sub>0.03</sub>Fe<sup>3+</sup><sub>2.02</sub>Mg<sub>0.01</sub>)</td><td>Manito</td><td>0.644</td><td>9.155</td></tr><tr><td>(Si<sub>3.5</sub>Al<sub>0.5</sub>)(Al<sub>0.05</sub>Fe<sup>3+</sup><sub>1.93</sub>Mg<sub>0.12</sub>)</td><td>Garfield</td><td>0.647</td><td>9.175</td></tr><tr><td>(Si<sub>3.5</sub>Al<sub>0.5</sub>)(Al<sub>0.08</sub>Fe<sup>3+</sup><sub>1.84</sub>Mg<sub>0.08</sub>)</td><td>Nontron</td><td>0.644</td><td>9.12</td></tr><tr><td>(Si<sub>3.57</sub>Al<sub>0.43</sub>)(Al<sub>0.08</sub>Fe<sup>3+</sup><sub>1.79</sub>Fe<sup>2+</sup><sub>0.04</sub>Mg<sub>0.08</sub>)</td><td>Behenjy</td><td>0.646</td><td>9.13</td></tr></table>

Trioctahedral smectites

<table><tr><td>(Si<sub>3.19</sub>Al<sub>0.75</sub>Fe<sup>3+</sup><sub>0.06</sub>)(Fe<sup>3+</sup><sub>0.45</sub>Fe<sup>2+</sup><sub>0.26</sub>Mg<sub>2.29</sub>)</td><td>saponite</td><td>0.714</td><td>9.258</td></tr><tr><td>(Si<sub>3.70</sub>Al<sub>0.30</sub>)(Al<sub>0.04</sub>Fe<sup>3+</sup><sub>0.01</sub>Mg<sub>2.85</sub>)</td><td>saponite</td><td>0.717</td><td>9.165</td></tr><tr><td>(Si<sub>3.38</sub>Al<sub>0.62</sub>)(Al<sub>0.03</sub>Fe<sup>3+</sup><sub>0.02</sub>Mg<sub>2.95</sub>)</td><td>saponite</td><td>0.718</td><td>9.218</td></tr><tr><td>(Si<sub>3.63</sub>Al<sub>0.37</sub>)(Fe<sup>3+</sup><sub>0.01</sub>Mg<sub>2.99</sub>)</td><td>saponite</td><td>0.720</td><td>9.198</td></tr><tr><td>(Si<sub>3.50</sub>Al<sub>0.50</sub>)(Al<sub>0.15</sub>Fe<sup>3+</sup><sub>0.04</sub>Mg<sub>2.92</sub>Mn<sub>0.01</sub>)</td><td>saponite</td><td>0.717</td><td>9.178</td></tr><tr><td>(Si<sub>3.38</sub>Al<sub>0.52</sub>Fe<sup>3+</sup><sub>0.1</sub>)(Al<sub>0.05</sub>Fe<sup>2+</sup><sub>0.05</sub>Mg<sub>2.91</sub>)</td><td>saponite</td><td>0.718</td><td>9.197</td></tr><tr><td>(Si<sub>3.19</sub>Al<sub>0.81</sub>)(Al<sub>0.04</sub>Fe<sup>3+</sup><sub>0.44</sub>Fe<sup>2+</sup><sub>0.52</sub>Mg<sub>1.88</sub>)</td><td>griffithite</td><td>0.717</td><td>9.246</td></tr><tr><td>(Si<sub>3.30</sub>Al<sub>0.70</sub>)(Al<sub>0.79</sub>Fe<sup>3+</sup><sub>0.02</sub>Zn<sub>1.85</sub>Mg<sub>0.14</sub>)</td><td>sauconite</td><td>0.680</td><td>9.228</td></tr><tr><td>(Si<sub>3.39</sub>Al<sub>0.61</sub>)(Al<sub>0.78</sub>Fe<sup>3+</sup><sub>0.23</sub>Zn<sub>1.54</sub>Mg<sub>0.15</sub>)</td><td>sauconite</td><td>0.672</td><td>9.220</td></tr><tr><td>(Si<sub>3.27</sub>Al<sub>0.73</sub>)(Al<sub>0.12</sub>Fe<sup>3+</sup><sub>0.13</sub>Zn<sub>2.64</sub>Mg<sub>0.11</sub>)</td><td>sauconite</td><td>0.727</td><td>9.251</td></tr><tr><td>(Si<sub>3.35</sub>Al<sub>0.65</sub>)(Al<sub>0.04</sub>Fe<sup>3+</sup><sub>0.02</sub>Zn<sub>2.89</sub>Mg<sub>0.10</sub>Mn<sub>0.01</sub>)</td><td>sauconite</td><td>0.736</td><td>9.247</td></tr><tr><td>(Si<sub>3.39</sub>Al<sub>0.61</sub>)(Al<sub>0.17</sub>Fe<sup>3+</sup><sub>0.58</sub>Zn<sub>1.95</sub>Mg<sub>0.12</sub>)</td><td>sauconite</td><td>0.707</td><td>9.259</td></tr><tr><td>(Si<sub>3.47</sub>Al<sub>0.53</sub>)(Al<sub>0.22</sub>Fe<sup>3+</sup><sub>0.17</sub>Zn<sub>2.40</sub>Mg<sub>0.18</sub>)</td><td>sauconite</td><td>0.718</td><td>9.252</td></tr><tr><td>Si<sub>4</sub> (Al<sub>0.01</sub>Mg<sub>2.71</sub>Li<sub>0.34</sub>)</td><td>hectorite</td><td>0.724</td><td>9.119</td></tr><tr><td>(Si<sub>3.95</sub>Al<sub>0.05</sub>)(Mg<sub>2.73</sub>Li<sub>0.33</sub>)</td><td>hectorite</td><td>0.724</td><td>9.180</td></tr><tr><td>Si<sub>4</sub> (Fe<sup>3+</sup><sub>0.02</sub>Mg<sub>2.88</sub>Mn<sub>0.02</sub>)</td><td>stevensite</td><td>0.720</td><td>9.156</td></tr><tr><td>(Si<sub>3.82</sub>Al<sub>0.18</sub>)(Al<sub>0.4</sub>Cr<sup>3+</sup><sub>0.35</sub>Fe<sup>3+</sup><sub>0.58</sub>Mg<sub>0.82</sub>)</td><td>volkonskoite</td><td>0.648</td><td>9.119</td></tr></table>

Other volkonskoite

<table><tr><td>(Si<sub>3.7</sub>Al<sub>0.3</sub>)(Cr<sup>3+</sup><sub>1.1</sub>Mg<sub>1.26</sub>)</td><td>Jordan</td><td>0.671</td><td>9.162</td><td>Khoury et al. (1984)</td></tr><tr><td>(Si<sub>3.59</sub>Al<sub>0.41</sub>)(Cr<sup>3+</sup><sub>1.07</sub>Fe<sup>3+</sup><sub>0.35</sub>Mg<sub>0.75</sub>)</td><td>R4820</td><td>0.656</td><td>9.08</td><td>Foord et al. (1987)</td></tr></table>
<table><thead><tr><th></th><th></th><th></th><th></th></tr></thead><tbody><tr><td><strong>Other saponite</strong></td><td></td><td></td><td></td></tr><tr><td>(Si<sub>3.30</sub>Al<sub>0.68</sub>Fe<sup>3+</sup><sub>0.02</sub>)(Mg<sub>2.50</sub>Fe<sup>2+</sup><sub>0.26</sub>Fe<sup>3+</sup><sub>0.24</sub>)</td><td>Kosakov</td><td>0.719</td><td>9.233</td><td>Suquet et al. (1975)</td></tr><tr><td><strong>Other trioctahedral smectites</strong></td><td></td><td></td><td></td></tr><tr><td>Si<sub>4</sub> Mg<sub>2.85</sub></td><td>stevensite n°1</td><td>0.720</td><td>9.120</td><td>Faust (1959)</td></tr><tr><td>Si<sub>4</sub> (Mg<sub>2.66</sub>Li<sub>0.3</sub>)</td><td>hectorite</td><td>0.724</td><td>9.120</td><td></td></tr><tr><td>Si<sub>4</sub> (Mg<sub>2.87</sub>Li<sub>0.1</sub>Fe<sup>2+</sup><sub>0.06</sub>Al<sub>0.03</sub>)</td><td>ghassoulite</td><td>0.721</td><td>9.100</td><td></td></tr><tr><td><strong>Smectitic series (Murin Murin. Australia)</strong></td><td></td><td></td><td></td></tr><tr><td>(Si<sub>3.8</sub>Al<sub>0.2</sub>)(Al<sub>0.36</sub>Fe<sup>3+</sup><sub>1.19</sub>Mg<sub>0.29</sub>Cr<sub>0.09</sub>Ni<sub>0.13</sub>)</td><td>2-22</td><td>0.638</td><td>9.078</td><td>Gaudin et al. (2004)</td></tr><tr><td>(Si<sub>3.79</sub>Al<sub>0.21</sub>)(Al<sub>0.67</sub>Fe<sup>3+</sup><sub>0.91</sub>Mg<sub>0.19</sub>Cr<sub>0.13</sub>Ni<sub>0.13</sub>)</td><td>2-21</td><td>0.617</td><td>9.054</td><td></td></tr><tr><td>(Si<sub>3.78</sub>Al<sub>0.22</sub>)(Al<sub>0.47</sub>Fe<sup>3+</sup><sub>1.01</sub>Mg<sub>0.2</sub>Cr<sub>0.17</sub>Ni<sub>0.19</sub>)</td><td>2-19</td><td>0.629</td><td>9.072</td><td></td></tr><tr><td>(Si<sub>3.78</sub>Al<sub>0.22</sub>)(Al<sub>0.59</sub>Fe<sup>3+</sup><sub>0.91</sub>Mg<sub>0.23</sub>Cr<sub>0.19</sub>Ni<sub>0.12</sub>)</td><td>2-17</td><td>0.621</td><td>9.060</td><td></td></tr><tr><td>(Si<sub>3.79</sub>Al<sub>0.21</sub>)(Al<sub>0.08</sub>Fe<sup>3+</sup><sub>1.3</sub>Mg<sub>0.55</sub>Cr<sub>0.05</sub>Ni<sub>0.12</sub>)</td><td>5-19v</td><td>0.660</td><td>9.072</td><td></td></tr><tr><td>(Si<sub>3.69</sub>Al<sub>0.31</sub>)(Al<sub>0.54</sub>Fe<sup>3+</sup><sub>0.99</sub>Mg<sub>0.19</sub>Cr<sub>0.21</sub>Ni<sub>0.1</sub>)</td><td>5-46</td><td>0.622</td><td>9.060</td><td></td></tr><tr><td>(Si<sub>3.8</sub>Al<sub>0.2</sub>)(Al<sub>0.31</sub>Fe<sup>3+</sup><sub>1.29</sub>Mg<sub>0.2</sub>Cr<sub>0.1</sub>Ni<sub>0.11</sub>)</td><td>5-43v3</td><td>0.636</td><td>9.078</td><td></td></tr><tr><td>(Si<sub>3.79</sub>Al<sub>0.21</sub>)(Al<sub>0.11</sub>Fe<sup>3+</sup><sub>1.41</sub>Mg<sub>0.37</sub>Cr<sub>0.08</sub>Ni<sub>0.12</sub>)</td><td>5-36</td><td>0.654</td><td>9.084</td><td></td></tr><tr><td>(Si<sub>3.79</sub>Al<sub>0.21</sub>)(Al<sub>0.15</sub>Fe<sup>3+</sup><sub>1.33</sub>Mg<sub>0.5</sub>Cr<sub>0.03</sub>Ni<sub>0.13</sub>)</td><td>5-25</td><td>0.657</td><td>9.090</td><td></td></tr><tr><td>(Si<sub>3.65</sub>Al<sub>0.35</sub>)(Fe<sup>3+</sup><sub>1.67</sub>Mg<sub>0.46</sub>Cr<sub>0.05</sub>Ni<sub>0.12</sub>)</td><td>5-23</td><td>0.662</td><td>9.090</td><td></td></tr><tr><td><strong>Other intermediary smectites</strong></td><td></td><td></td><td></td></tr><tr><td>(Si<sub>3.49</sub>Al<sub>0.51</sub>)(Al<sub>0.17</sub>Fe<sup>3+</sup><sub>0.85</sub>Mg<sub>1.39</sub>)</td><td>Mont Megantic, Quebec</td><td>0.680</td><td>9.150</td><td>Kodama et al. (1988)</td></tr><tr><td><strong>Vermiculite</strong></td><td></td><td></td><td></td></tr><tr><td>(Si<sub>2.86</sub>Al<sub>1.14</sub>)(Al<sub>0.15</sub>Fe<sup>3+</sup><sub>0.01</sub>Mg<sub>2.83</sub>)</td><td>Llano</td><td>0.684</td><td>9.255</td><td>Shirozu & Bailey (1966)</td></tr><tr><td>(Si<sub>2.72</sub>Al<sub>1.28</sub>)(Al<sub>0.16</sub>Fe<sup>3+</sup><sub>0.48</sub>Mg<sub>2.36</sub>)</td><td>Kenya</td><td>0.668</td><td>9.18</td><td>Mathieson & Walker (1954)</td></tr><tr><td>(Si<sub>2.65</sub>Al<sub>1.35</sub>)(Al<sub>0.35</sub>Fe<sup>3+</sup><sub>0.29</sub>Fe<sup>2+</sup><sub>0.04</sub>Mg<sub>2.68</sub>)</td><td>Ajmer, India</td><td>0.709</td><td>9.168</td><td>http://www.hanbookofmineralogy.org/</td></tr></tbody></table>

### Synthetic smectites
<table><tbody><tr><td colspan="4"><strong>Dioctahedral Al-Fe<sup>3+</sup> smectitic series</strong></td><td colspan="2">Petit et al. (2015)</td></tr><tr><td>(Si, Al)<sub>4</sub> (Fe<sup>3+</sup>(2-x)Al<sub>x</sub>)</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>(Si<sub>3.52</sub>Al<sub>0.35</sub>Fe<sup>3+</sup><sub>0.13</sub>)(Fe<sup>3+</sup><sub>2</sub>)</td><td>1</td><td>0.645</td><td>9.186</td><td></td><td></td></tr><tr><td>(Si<sub>3.64</sub>Al<sub>0.36</sub>)(Fe<sup>3+</sup><sub>1.89</sub>Al<sub>0.11</sub>)</td><td>14</td><td>0.639</td><td>9.168</td><td></td><td></td></tr><tr><td>(Si<sub>3.61</sub>Al<sub>0.39</sub>)(Fe<sup>3+</sup><sub>1.74</sub>Al<sub>0.26</sub>)</td><td>19</td><td>0.631</td><td>9.132</td><td></td><td></td></tr><tr><td></td><td>Beidellite 19</td><td></td><td>9.189</td><td>Heuser et al. (2013)</td><td>Italicized: same sample, b measured by Rietveld</td></tr><tr><td>(Si,Al)<sub>4</sub> (Fe<sup>3+</sup><sub>0.38</sub>Al<sub>1.62</sub>)</td><td>23</td><td>0.556</td><td>8.982</td><td></td><td></td></tr><tr><td></td><td>Beidellite 23</td><td></td><td>9.059</td><td>Heuser et al. (2013)</td><td></td></tr><tr><td>(Si,Al)<sub>4</sub> (Fe<sup>3+</sup><sub>0.34</sub>Al<sub>1.66</sub>)</td><td>31</td><td>0.554</td><td>8.970</td><td></td><td></td></tr><tr><td></td><td>Beidellite 31</td><td></td><td>9.019</td><td>Heuser et al. (2013)</td><td></td></tr><tr><td>(Si<sub>3.47</sub>Al<sub>0.45</sub>Fe<sup>3+</sup><sub>0.07</sub>)(Fe<sup>3+</sup><sub>1.97</sub>Al<sub>0.03</sub>)</td><td>39</td><td>0.643</td><td>9.156</td><td></td><td></td></tr><tr><td>(Si<sub>3.51</sub>Al<sub>0.36</sub>Fe<sup>3+</sup><sub>0.13</sub>)(Fe<sup>3+</sup><sub>1.80</sub>Al<sub>0.20</sub>)</td><td>41</td><td>0.634</td><td>9.126</td><td></td><td></td></tr><tr><td>(Si<sub>3.5</sub>Al<sub>0.5</sub>)(Fe<sup>3+</sup><sub>1.64</sub>Al<sub>0.36</sub>)</td><td>43</td><td>0.625</td><td>9.138</td><td></td><td></td></tr><tr><td>(Si,Al)<sub>4</sub> (Fe<sup>3+</sup><sub>1.26</sub>Al<sub>0.74</sub>)</td><td>52</td><td>0.604</td><td>9.096</td><td></td><td></td></tr><tr><td>(Si<sub>3.6</sub>Al<sub>0.4</sub>)(Fe<sup>3+</sup><sub>0.8</sub>Al<sub>1.2</sub>)</td><td>53</td><td>0.579</td><td>9.048</td><td></td><td></td></tr><tr><td>(Si<sub>3.7</sub>Al<sub>0.3</sub>)(Fe<sup>3+</sup><sub>0.57</sub>Al<sub>1.43</sub>)</td><td>54</td><td>0.566</td><td>9.000</td><td></td><td></td></tr><tr><td colspan="4"><strong>Dioctahedral Ga-Fe<sup>3+</sup> smectitic series</strong></td><td colspan="2">Petit et al. (2016)</td></tr><tr><td>(Si, Ga)<sub>4</sub> (Fe<sup>3+</sup>(2-x)Ga<sub>x</sub>)</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>(Si<sub>3.24</sub>Ga<sub>0.76</sub>)Ga<sub>2</sub></td><td>0.00</td><td>0.620</td><td>9.100</td><td></td><td></td></tr><tr><td>(Si<sub>3.25</sub>Ga<sub>0.75</sub>)Fe<sup>3+</sup><sub>0.5</sub>Ga<sub>1.5</sub>)</td><td>0.25</td><td>0.626</td><td>9.114</td><td></td><td></td></tr><tr><td>(Si<sub>3.42</sub>Ga<sub>0.58</sub>)Fe<sup>3+</sup><sub>0.86</sub>Ga<sub>1.14</sub>)</td><td>0.50</td><td>0.631</td><td>9.117</td><td></td><td></td></tr><tr><td>(Si<sub>3.48</sub>Ga<sub>0.52</sub>)Fe<sup>3+</sup><sub>1.11</sub>Ga<sub>0.89</sub>)</td><td>0.75</td><td>0.634</td><td>9.123</td><td></td><td></td></tr><tr><td>(Si<sub>3.48</sub>Ga<sub>0.52</sub>)Fe<sup>3+</sup><sub>1.24</sub>Ga<sub>0.76</sub>)</td><td>1.00</td><td>0.636</td><td>9.127</td><td></td><td></td></tr><tr><td colspan="4"><strong>Dioctahedral Fe<sup>3+</sup>-nontronite series</strong></td><td colspan="2">Baron et al. (2016b)</td></tr><tr><td>(Si<sub>4-x</sub>Fe<sup>3+x</sup>) (Fe<sup>3+x</sup>) (tetrahedral composition)</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Si<sub>3.57</sub>Fe<sup>3+</sup><sub>0.43</sub></td><td></td><td>0.645</td><td>9.174</td><td></td><td></td></tr><tr><td>Si<sub>3.54</sub>Fe<sup>3+</sup><sub>0.46</sub></td><td></td><td>0.645</td><td>9.168</td><td></td><td></td></tr><tr><td>Si<sub>3.51</sub>Fe<sup>3+</sup><sub>0.49</sub></td><td></td><td>0.645</td><td>9.180</td><td></td><td></td></tr></tbody></table>
<table><tr><td>Si<sub>3.50</sub> Fe<sup>3+</sup><sub>0.50</sub></td><td></td><td>0.645</td><td>9.186</td></tr><tr><td>Si<sub>3.49</sub>Fe<sup>3+</sup><sub>0.51</sub></td><td></td><td>0.645</td><td>9.180</td></tr><tr><td>Si<sub>3.47</sub> Fe<sup>3+</sup><sub>0.53</sub></td><td></td><td>0.645</td><td>9.186</td></tr><tr><td>Si<sub>3.43</sub>Fe<sup>3+</sup><sub>0.57</sub></td><td></td><td>0.645</td><td>9.198</td></tr><tr><td>Si<sub>3.32</sub>Fe<sup>3+</sup><sub>0.68</sub></td><td></td><td>0.645</td><td>9.198</td></tr><tr><td>Si<sub>3.15</sub> Fe<sup>3+</sup><sub>0.85</sub></td><td></td><td>0.645</td><td>9.216</td></tr><tr><td>Si<sub>3.13</sub> Fe<sup>3+</sup><sub>0.87</sub></td><td></td><td>0.645</td><td>9.222</td></tr><tr><td>Si<sub>3.01</sub>Fe<sup>3+</sup><sub>0.99</sub></td><td></td><td>0.645</td><td>9.240</td></tr></table>

### Di-trioctahedral Fe³⁺-Mg smectitic series

<table><tr><td>(Si, Fe³⁺)<sub>4</sub> (Fe³⁺, Mg)<sub>γ</sub></td><td></td><td></td><td></td></tr><tr><td>(Si<sub>3.88</sub> Fe³⁺<sub>0.12</sub>) (Fe³⁺<sub>1.73</sub> Mg<sub>0.24</sub>)</td><td>2</td><td>0.654</td><td>9.095</td></tr><tr><td>(Si<sub>3.9</sub> Fe³⁺<sub>0.1</sub>) (Fe³⁺<sub>1.58</sub> Mg<sub>0.47</sub>)</td><td>3</td><td>0.662</td><td>9.092</td></tr><tr><td>(Si<sub>3.87</sub> Fe³⁺<sub>0.13</sub>) (Fe³⁺<sub>1.40</sub> Mg<sub>0.76</sub>)</td><td>4</td><td>0.671</td><td>9.104</td></tr><tr><td>(Si<sub>3.97</sub> Fe³⁺<sub>0.03</sub>) (Fe³⁺<sub>1.17</sub> Mg<sub>1.02</sub>)</td><td>5</td><td>0.680</td><td>9.129</td></tr><tr><td>(Si<sub>3.96</sub> Fe³⁺<sub>0.04</sub>) (Fe³⁺<sub>1.08</sub> Mg<sub>1.22</sub>)</td><td>6</td><td>0.685</td><td>9.122</td></tr><tr><td>(Si<sub>3.97</sub> Fe³⁺<sub>0.03</sub>) (Fe³⁺<sub>0.84</sub> Mg<sub>1.58</sub>)</td><td>7</td><td>0.694</td><td>9.126</td></tr><tr><td>(Si<sub>3.96</sub> Fe³⁺<sub>0.04</sub>) (Fe³⁺<sub>0.56</sub> Mg<sub>2.03</sub>)</td><td>8</td><td>0.704</td><td>9.143</td></tr><tr><td>Si<sub>4</sub> (Fe³⁺<sub>0.30</sub> Mg<sub>2.43</sub>)</td><td>9</td><td>0.712</td><td>9.152</td></tr></table>

Grauby *et al.* (1995)

### Fe²⁺-rich saponite series

<table><tr><td>(Si<sub>3.54</sub>Al<sub>0.46</sub>)(Fe<sup>2+</sup><sub>2.66</sub>Al<sub>0.27</sub>)</td><td>A</td><td>0.757</td><td>9.384</td></tr><tr><td>(Si<sub>3.54</sub>Al<sub>0.46</sub>)(Fe<sup>2+</sup><sub>2.36</sub>Al<sub>0.28</sub> Mg<sub>0.27</sub>)</td><td>B</td><td>0.751</td><td>9.300</td></tr><tr><td>(Si<sub>3.42</sub>Al<sub>0.58</sub>)(Fe<sup>2+</sup><sub>1.43</sub>Al<sub>0.17</sub>Fe<sup>3+</sup><sub>0.27</sub>Mg<sub>0.99</sub>)</td><td>C</td><td>0.732</td><td>9.228</td></tr><tr><td>(Si<sub>3.52</sub>Al<sub>0.48</sub>)(Fe<sup>2+</sup><sub>0.82</sub>Al<sub>0.17</sub>Fe<sup>3+</sup><sub>0.04</sub>Mg<sub>1.75</sub>)</td><td>D</td><td>0.725</td><td>9.192</td></tr><tr><td>(Si<sub>3.6</sub>Al<sub>0.4</sub>)(Fe<sup>2+</sup><sub>1.5</sub>Al<sub>0.86</sub>Fe<sup>3+</sup><sub>0.17</sub>)</td><td>E</td><td>0.688</td><td>9.258</td></tr><tr><td>(Si<sub>3.58</sub>Al<sub>0.42</sub>)(Fe<sup>2+</sup><sub>0.83</sub>Al<sub>0.8</sub>Fe<sup>3+</sup><sub>0.06</sub>Mg<sub>0.78</sub>)</td><td>F</td><td>0.678</td><td>9.174</td></tr><tr><td>(Si<sub>3.63</sub>Al<sub>0.37</sub>)(Fe<sup>2+</sup><sub>2.57</sub>Mg<sub>0.56</sub>)</td><td>G</td><td>0.769</td><td>9.222</td></tr><tr><td>(Si<sub>3.63</sub>Al<sub>0.37</sub>)(Fe<sup>2+</sup><sub>0.98</sub>Fe<sup>3+</sup><sub>0.05</sub>Mg<sub>2.15</sub>)</td><td>H</td><td>0.737</td><td>9.198</td></tr></table>

Chemtob *et al.* (2014)
<table><thead><tr><th></th><th></th><th></th><th></th><th></th></tr></thead><tbody><tr><td><strong>Saponite series</strong></td><td></td><td></td><td></td><td>Suquet et al. (1981)</td></tr><tr><td>Na (Si<sub>4-x</sub>Al<sub>x</sub>) (Mg<sub>(3-y)</sub>Al<sub>y</sub>)</td><td></td><td></td><td></td><td></td></tr><tr><td>(Si<sub>3.67</sub>Al<sub>0.33</sub>)(Mg<sub>3.0</sub>)</td><td>1</td><td>0.720</td><td>9.184</td><td></td></tr><tr><td>(Si<sub>3.5</sub>Al<sub>0.5</sub>)(Mg<sub>3.0</sub>)</td><td>2</td><td>0.720</td><td>9.199</td><td></td></tr><tr><td>(Si<sub>3.3</sub>Al<sub>0.7</sub>)(Mg<sub>2.8</sub>Al<sub>0.2</sub>)</td><td>3</td><td>0.708</td><td>9.201</td><td></td></tr><tr><td>(Si<sub>3.2</sub>Al<sub>0.8</sub>)(Mg<sub>2.8</sub>Al<sub>0.2</sub>)</td><td>4</td><td>0.708</td><td>9.214</td><td></td></tr><tr><td>(Si<sub>3.1</sub>Al<sub>0.9</sub>)(Mg<sub>2.8</sub>Al<sub>0.2</sub>)</td><td>5</td><td>0.708</td><td>9.217</td><td></td></tr><tr><td>(Si<sub>3.2</sub>Al<sub>0.8</sub>)(Mg<sub>3.0</sub>)</td><td>6</td><td>0.720</td><td>9.219</td><td></td></tr><tr><td>(Si<sub>3.0</sub>Al<sub>1.0</sub>)(Mg<sub>2.8</sub>Al<sub>0.2</sub>)</td><td>7</td><td>0.708</td><td>9.221</td><td></td></tr><tr><td>(Si<sub>3.0</sub>Al<sub>1.0</sub>)(Mg<sub>3.0</sub>)</td><td>8</td><td>0.720</td><td>9.237</td><td></td></tr><tr><td><strong>Trioctahedral smectites</strong></td><td></td><td></td><td></td><td></td></tr><tr><td>(Si<sub>3.6</sub>Al<sub>0.4</sub>) Zn<sub>3</sub></td><td>sauconite</td><td>0.740</td><td>9.192</td><td>Higashi et al. (2002)</td></tr><tr><td>Si<sub>4</sub> (Zn<sub>2.6</sub>Li<sub>0.4</sub>)</td><td>Zn-hectorite</td><td>0.743</td><td>9.150</td><td></td></tr><tr><td>Si<sub>4</sub> (Mg<sub>2.6</sub>Li<sub>0.4</sub>)</td><td>hectorite</td><td>0.725</td><td>9.120</td><td></td></tr><tr><td><strong>Hectorite</strong></td><td></td><td></td><td></td><td></td></tr><tr><td>Si<sub>4</sub> (Mg<sub>2.67</sub>Li<sub>0.33</sub>)</td><td>hectorite</td><td>0.724</td><td>9.096</td><td>Decarreau (1980)</td></tr><tr><td><strong>Zn-stenvensite series</strong></td><td></td><td></td><td></td><td>Petit et al. (2008)</td></tr><tr><td><strong>Si<sub>4</sub> Zn<sub>x</sub></strong></td><td></td><td></td><td></td><td></td></tr><tr><td>Si<sub>4</sub> Zn<sub>2.77</sub></td><td>Zn80</td><td>0.740</td><td>9.198</td><td></td></tr><tr><td>Si<sub>4</sub> Zn<sub>2.97</sub></td><td>Zn100</td><td>0.740</td><td>9.198</td><td></td></tr><tr><td>Si<sub>4</sub> Zn<sub>2.99</sub></td><td>Zn120</td><td>0.740</td><td>9.210</td><td></td></tr><tr><td>Si<sub>4</sub> Zn<sub>2.90</sub></td><td>Zn150</td><td>0.740</td><td>9.180</td><td></td></tr><tr><td>Si<sub>4</sub> Zn<sub>2.97</sub></td><td>Zn200</td><td>0.740</td><td>9.150</td><td></td></tr><tr><td><strong>Stenvensite series</strong></td><td></td><td></td><td></td><td>Decarreau (1983)</td></tr><tr><td><strong>Si<sub>4</sub> R<sup>2+</sup><sub>3-ε</sub></strong></td><td></td><td></td><td></td><td></td></tr><tr><td>Si<sub>4</sub> Ni<sub>3-ε</sub></td><td>Ni</td><td>0.690</td><td>9.087</td><td></td></tr></tbody></table>
<table><tr><td>Si<sub>4</sub> Mg<sub>3-ε</sub></td><td>Mg</td><td>0.720</td><td>9.144</td></tr><tr><td>Si<sub>4</sub> Zn<sub>3-ε</sub></td><td>Zn</td><td>0.740</td><td>9.219</td></tr><tr><td>Si<sub>4</sub> Fe<sup>2+3-ε</sup></td><td>Fe</td><td>0.780</td><td>9.270</td></tr><tr><td>Si<sub>4</sub> (Mg<sub>0.82</sub>Zn<sub>0.18</sub>)<sub>3-ε</sub></td><td>Zn 0.18</td><td>0.724</td><td>9.150</td></tr><tr><td>Si<sub>4</sub> (Mg<sub>0.43</sub>Zn<sub>0.47</sub>)<sub>3-ε</sub></td><td>Zn 0.47</td><td>0.729</td><td>9.190</td></tr></table>
<table><caption>Table 6: Data used for micas. R: mean ionic radius of octahedral cations (Å) calculated with r(Li⁺) = 0.76 Å (see text); b: crystallographic parameter (Å). *Sample reference in the paper.</caption><thead><tr><th>Mica and assimilated (anhydrous composition)</th><th>Sample*</th><th>R</th><th>b</th><th>References</th><th>Comments</th></tr></thead><tbody><tr><td colspan="6"><strong>Synthetic mica</strong></td></tr><tr><td>(Si<sub>3</sub>Al<sub>1</sub>)(Al<sub>2</sub>)K</td><td>2M muscovite</td><td>0.535</td><td>8.995</td><td>Yoder &amp; Eugster (1955)</td><td></td></tr><tr><td>(Si<sub>3</sub>Al<sub>1</sub>)(Al<sub>2</sub>)K</td><td>muscovite</td><td>0.535</td><td>8.992</td><td>Guidotti et al. (1992)</td><td>average of 12 muscovites</td></tr><tr><td>(Si<sub>3</sub>Al<sub>1</sub>)(Al<sub>2</sub>)Na</td><td>32</td><td>0.535</td><td>8.900</td><td>Radoslovich &amp; Norrish (1962)</td><td>as named in the paper</td></tr><tr><td>(Si<sub>3</sub>Al<sub>1</sub>)(Mg<sub>3</sub>)K</td><td>27</td><td>0.720</td><td>9.204</td><td></td><td>paragonite</td></tr><tr><td>(Si<sub>3</sub>Al<sub>1</sub>)(Mg<sub>3</sub>)K F</td><td>28</td><td>0.720</td><td>9.195</td><td></td><td>phlogopite</td></tr><tr><td>(Si<sub>3</sub>Al<sub>1</sub>)(Mn<sub>3</sub>)K</td><td>Mn-mica</td><td>0.830</td><td>9.37</td><td>Frondel &amp; Ito (1966)</td><td>fluorophlogopite</td></tr><tr><td>(Si<sub>3</sub>Al<sub>1</sub>)(Zn<sub>3</sub>)K</td><td>Zn-mica</td><td>0.740</td><td>9.32</td><td></td><td></td></tr><tr><td colspan="6"><strong>Synthetic series (Si<sub>3</sub>Al<sub>1</sub>) (Mg<sub>3-x</sub>R<sup>2+x</sup>) K</strong></td></tr><tr><td>Mg<sub>3</sub></td><td>M#1</td><td>0.720</td><td>9.204</td><td>Hazen &amp; Wones (1972)</td><td></td></tr><tr><td>Co<sub>3</sub></td><td>M#114</td><td>0.745</td><td>9.240</td><td></td><td></td></tr><tr><td>Cu<sub>3</sub></td><td>M#29</td><td>0.730</td><td>9.238</td><td></td><td></td></tr><tr><td>Ni<sub>3</sub></td><td>M#115</td><td>0.690</td><td>9.175</td><td></td><td></td></tr><tr><td>Mg<sub>2.5</sub>Fe<sup>2+</sup></sub></td><td>0.169</td><td>0.730</td><td>9.230</td><td></td><td></td></tr><tr><td>Mg<sub>2.25</sub>Fe<sup>2+</sup></sub></td><td>0.250</td><td>0.735</td><td>9.242</td><td></td><td></td></tr><tr><td>Mg<sub>1.94</sub>Fe<sup>2+</sup></sub></td><td>0.352</td><td>0.741</td><td>9.260</td><td></td><td></td></tr><tr><td>Mg<sub>1.65</sub>Fe<sup>2+</sup></sub></td><td>0.450</td><td>0.747</td><td>9.276</td><td></td><td></td></tr><tr><td>Mg<sub>1.35</sub>Fe<sup>2+</sup></sub></td><td>0.550</td><td>0.753</td><td>9.285</td><td></td><td></td></tr><tr><td>Mg<sub>0.7</sub>Fe<sup>2+</sup></sub></td><td>0.765</td><td>0.766</td><td>9.312</td><td></td><td></td></tr><tr><td>Mg<sub>0.36</sub>Fe<sup>2+</sup></sub></td><td>0.880</td><td>0.773</td><td>9.335</td><td></td><td></td></tr><tr><td>Fe<sup>2+</sup></td><td>Fe<sup>2+</sup></td><td>0.780</td><td>9.347</td><td></td><td></td></tr><tr><td colspan="6"><strong>Synthetic series (Si<sub>3-x</sub>Al<sub>1+x</sub>) (Mg<sub>x</sub>Fe<sup>2+</sup>Al<sub>2</sub>) K</strong></td></tr><tr><td>(Si<sub>3</sub>Al)(Mg<sub>3</sub>)</td><td>222-69</td><td>0.720</td><td>9.206</td><td>Hewitt &amp; Wones (1975)</td><td></td></tr><tr><td>(Si<sub>3</sub>Al<sub>1</sub>)(Mg<sub>2.25</sub>Fe<sup>2+</sup></sub>)</td><td>45-73</td><td>0.735</td><td>9.243</td><td></td><td></td></tr></tbody></table>
<table>
  <tbody>
    <tr>
      <td>(Si<sub>3</sub>Al<sub>1</sub>)(Mg<sub>2.01</sub>Fe<sup>2+</sup><sub>0.99</sub>)</td>
      <td>40-73</td>
      <td>0.740</td>
      <td>9.253</td>
    </tr>
    <tr>
      <td>(Si<sub>3</sub>Al<sub>1</sub>)(Mg<sub>1.50</sub>Fe<sup>2+</sup><sub>1.50</sub>)</td>
      <td>53-73</td>
      <td>0.750</td>
      <td>9.280</td>
    </tr>
    <tr>
      <td>(Si<sub>3</sub>Al<sub>1</sub>)(Mg<sub>0.75</sub>Fe<sup>2+</sup><sub>2.25</sub>)</td>
      <td>68-73</td>
      <td>0.765</td>
      <td>9.312</td>
    </tr>
    <tr>
      <td>(Si<sub>3</sub>Al<sub>1</sub>)(Fe<sup>2+</sup>)</td>
      <td>142-70</td>
      <td>0.780</td>
      <td>9.352</td>
    </tr>
    <tr>
      <td>(Si<sub>2.87</sub>Al<sub>1.13</sub>)(Fe<sup>2+</sup><sub>2.87</sub>Al<sub>0.13</sub>)</td>
      <td>67-73</td>
      <td>0.770</td>
      <td>9.339</td>
    </tr>
    <tr>
      <td>(Si<sub>2.83</sub>Al<sub>1.17</sub>)(Mg<sub>2.83</sub>Al<sub>0.17</sub>)</td>
      <td>55-73</td>
      <td>0.710</td>
      <td>9.193</td>
    </tr>
    <tr>
      <td>(Si<sub>2.75</sub>Al<sub>1.25</sub>)(Mg<sub>2.75</sub>Al<sub>0.25</sub>)</td>
      <td>189-70</td>
      <td>0.705</td>
      <td>9.191</td>
    </tr>
    <tr>
      <td>(Si<sub>2.75</sub>Al<sub>1.25</sub>)(Mg<sub>2.06</sub>Fe<sup>2+</sup><sub>0.69</sub>Al<sub>0.25</sub>)</td>
      <td>28-73</td>
      <td>0.718</td>
      <td>9.230</td>
    </tr>
    <tr>
      <td>(Si<sub>2.75</sub>Al<sub>1.25</sub>)(Mg<sub>1.375</sub>Fe<sup>2+</sup><sub>1.375</sub>Al<sub>0.25</sub>)</td>
      <td>29-73</td>
      <td>0.732</td>
      <td>9.267</td>
    </tr>
    <tr>
      <td>(Si<sub>2.75</sub>Al<sub>1.25</sub>)(Mg<sub>0.69</sub>Fe<sup>2+</sup><sub>2.06</sub>Al<sub>0.25</sub>)</td>
      <td>11-72</td>
      <td>0.746</td>
      <td>9.301</td>
    </tr>
    <tr>
      <td>(Si<sub>2.75</sub>Al<sub>1.25</sub>)(Fe<sup>2+</sup><sub>2.75</sub>Al<sub>0.25</sub>)</td>
      <td>143-70</td>
      <td>0.760</td>
      <td>9.336</td>
    </tr>
    <tr>
      <td>(Si<sub>2.62</sub>Al<sub>1.38</sub>)(Fe<sup>2+</sup><sub>2.62</sub>Al<sub>0.38</sub>)</td>
      <td>4-72</td>
      <td>0.749</td>
      <td>9.325</td>
    </tr>
    <tr>
      <td>(Si<sub>2.50</sub>Al<sub>1.50</sub>)(Mg<sub>2.50</sub>Al<sub>0.50</sub>)</td>
      <td>224-69</td>
      <td>0.689</td>
      <td>9.170</td>
    </tr>
    <tr>
      <td>(Si<sub>2.50</sub>Al<sub>1.50</sub>)(Mg<sub>1.95</sub>Fe<sup>2+</sup><sub>0.55</sub>Al<sub>0.50</sub>)</td>
      <td>153-70</td>
      <td>0.700</td>
      <td>9.201</td>
    </tr>
    <tr>
      <td>(Si<sub>2.50</sub>Al<sub>1.50</sub>)(Mg<sub>1.88</sub>Fe<sup>2+</sup><sub>0.62</sub>Al<sub>0.50</sub>)</td>
      <td>26634</td>
      <td>0.702</td>
      <td>9.207</td>
    </tr>
    <tr>
      <td>(Si<sub>2.50</sub>Al<sub>1.50</sub>)(Mg<sub>1.25</sub>Fe<sup>2+</sup><sub>1.25</sub>Al<sub>0.50</sub>)</td>
      <td>13-72</td>
      <td>0.714</td>
      <td>9.240</td>
    </tr>
    <tr>
      <td>(Si<sub>2.50</sub>Al<sub>1.50</sub>)(Mg<sub>1.10</sub>Fe<sup>2+</sup><sub>1.40</sub>Al<sub>0.50</sub>)</td>
      <td>193-70</td>
      <td>0.717</td>
      <td>9.251</td>
    </tr>
    <tr>
      <td>(Si<sub>2.50</sub>Al<sub>1.50</sub>)(Mg<sub>0.70</sub>Fe<sup>2+</sup><sub>1.80</sub>Al<sub>0.50</sub>)</td>
      <td>152-70</td>
      <td>0.725</td>
      <td>9.271</td>
    </tr>
    <tr>
      <td>(Si<sub>2.50</sub>Al<sub>1.50</sub>)(Mg<sub>0.625</sub>Fe<sup>2+</sup><sub>1.875</sub>Al<sub>0.50</sub>)</td>
      <td>14-72</td>
      <td>0.727</td>
      <td>9.279</td>
    </tr>
    <tr>
      <td>(Si<sub>2.50</sub>Al<sub>1.50</sub>)(Fe<sup>2+</sup><sub>2.50</sub>Al<sub>0.50</sub>)</td>
      <td>38-73</td>
      <td>0.739</td>
      <td>9.312</td>
    </tr>
    <tr>
      <td>(Si<sub>2.37</sub>Al<sub>1.63</sub>)(Fe<sup>2+</sup><sub>2.37</sub>Al<sub>0.63</sub>)</td>
      <td>6-72</td>
      <td>0.729</td>
      <td>9.295</td>
    </tr>
    <tr>
      <td>(Si<sub>2.37</sub>Al<sub>1.63</sub>)(Mg<sub>2.37</sub>Al<sub>0.63</sub>)</td>
      <td>179-70</td>
      <td>0.681</td>
      <td>9.164</td>
    </tr>
    <tr>
      <td>(Si<sub>2.25</sub>Al<sub>1.75</sub>)(Mg<sub>1.69</sub>Fe<sup>2+</sup><sub>0.56</sub>Al<sub>0.75</sub>)</td>
      <td>15-72</td>
      <td>0.685</td>
      <td>9.190</td>
    </tr>
    <tr>
      <td>(Si<sub>2.25</sub>Al<sub>1.75</sub>)(Mg<sub>1.125</sub>Fe<sup>2+</sup><sub>1.125</sub>Al<sub>0.75</sub>)</td>
      <td>16-72</td>
      <td>0.696</td>
      <td>9.225</td>
    </tr>
    <tr>
      <td>(Si<sub>2.25</sub>Al<sub>1.75</sub>)(Mg<sub>0.56</sub>Fe<sup>2+</sup><sub>1.69</sub>Al<sub>0.75</sub>)</td>
      <td>17-72</td>
      <td>0.708</td>
      <td>9.261</td>
    </tr>
    <tr>
      <td>(Si<sub>2.25</sub>Al<sub>1.75</sub>)(Fe<sup>2+</sup><sub>2.25</sub>Al<sub>0.75</sub>)</td>
      <td>7-72</td>
      <td>0.719</td>
      <td>9.287</td>
    </tr>
  </tbody>
</table>

<table>
  <caption>Synthetic series (Si<sub>4-x</sub>Al<sub>x</sub>) (Fe<sup>2+</sup>,Fe<sup>3+</sup>,Mg)<sub>3</sub> K</caption>
  <thead>
    <tr>
      <th></th>
      <th>P (bar); T (°C)</th>
      <th></th>
      <th></th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Mg<sub>2.1</sub>Fe<sup>2+</sup><sub>0.48</sub>Fe<sup>3+</sup><sub>0.42</sub></td>
      <td>1035; 850</td>
      <td>0.719</td>
      <td>9.238</td>
    </tr>
    <tr>
      <td>Mg<sub>1.95</sub>Fe<sup>2+</sup><sub>0.60</sub>Fe<sup>3+</sup><sub>0.45</sub></td>
      <td>1035; 750</td>
      <td>0.721</td>
      <td>9.238</td>
    </tr>
    <tr>
      <td>Mg<sub>2.19</sub>Fe<sup>2+</sup><sub>0.42</sub>Fe<sup>3+</sup><sub>0.39</sub></td>
      <td>2070; 900</td>
      <td>0.719</td>
      <td>9.233</td>
    </tr>
    <tr>
      <td>Mg<sub>1.95</sub>Fe<sup>2+</sup><sub>0.60</sub>Fe<sup>3+</sup><sub>0.45</sub></td>
      <td>2070; 800</td>
      <td>0.721</td>
      <td>9.238</td>
    </tr>
    <tr>
      <td>Mg<sub>1.59</sub>Fe<sup>2+</sup><sub>1.26</sub>Fe<sup>3+</sup><sub>0.15</sub></td>
      <td>1035; 800</td>
      <td>0.741</td>
      <td>9.262</td>
    </tr>
    <tr>
      <td>Mg<sub>0.93</sub>Fe<sup>2+</sup><sub>1.86</sub>Fe<sup>3+</sup><sub>0.21</sub></td>
      <td>1035; 700</td>
      <td>0.752</td>
      <td>9.296</td>
    </tr>
    <tr>
      <td>Mg<sub>1.32</sub>Fe<sup>2+</sup><sub>1.50</sub>Fe<sup>3+</sup><sub>0.18</sub></td>
      <td>2070; 800</td>
      <td>0.746</td>
      <td>9.281</td>
    </tr>
  </tbody>
</table>

Synthetic series (Si<sub>4-x</sub>Al<sub>x</sub>) (Mg<sub>y</sub>Al<sub>z</sub>) K Robert (1976)
<table><tbody><tr><td>(Si<sub>3</sub>Al)Mg<sub>3</sub></td><td>1</td><td>0.720</td><td>9.209</td></tr><tr><td>(Si<sub>2.875</sub>Al<sub>1.125</sub>)(Mg<sub>2.875</sub>Al<sub>0.125</sub>)</td><td>2</td><td>0.712</td><td>9.206</td></tr><tr><td>(Si<sub>2.825</sub>Al<sub>1.175</sub>)(Mg<sub>2.825</sub>Al<sub>0.175</sub>)</td><td>3</td><td>0.709</td><td>9.201</td></tr><tr><td>(Si<sub>2.775</sub>Al<sub>1.225</sub>)(Mg<sub>2.775</sub>Al<sub>0.225</sub>)</td><td>4</td><td>0.706</td><td>9.199</td></tr><tr><td>(Si<sub>2.750</sub>Al<sub>1.250</sub>)(Mg<sub>2.750</sub>Al<sub>0.250</sub>)</td><td>5</td><td>0.705</td><td>9.198</td></tr><tr><td>(Si<sub>2.625</sub>Al<sub>1.375</sub>)(Mg<sub>2.625</sub>Al<sub>0.375</sub>)</td><td>6</td><td>0.697</td><td>9.191</td></tr><tr><td>(Si<sub>2.500</sub>Al<sub>1.500</sub>)(Mg<sub>2.500</sub>Al<sub>0.500</sub>)</td><td>7</td><td>0.689</td><td>9.185</td></tr><tr><td>(Si<sub>2.812</sub>Al<sub>1.188</sub>)(Mg<sub>2.738</sub>Al<sub>0.238</sub>)</td><td>8</td><td>0.705</td><td>9.195</td></tr><tr><td>(Si<sub>2.925</sub>Al<sub>1.075</sub>)(Mg<sub>2.715</sub>Al<sub>0.215</sub>)</td><td>9</td><td>0.706</td><td>9.191</td></tr><tr><td>(Si<sub>2.575</sub>Al<sub>1.425</sub>)(Mg<sub>2.500</sub>Al<sub>0.475</sub>)</td><td>10</td><td>0.690</td><td>9.173</td></tr><tr><td>(Si<sub>2.650</sub>Al<sub>1.350</sub>)(Mg<sub>2.500</sub>Al<sub>0.450</sub>)</td><td>11</td><td>0.692</td><td>9.182</td></tr><tr><td>(Si<sub>2.725</sub>Al<sub>1.275</sub>)(Mg<sub>2.500</sub>Al<sub>0.425</sub>)</td><td>12</td><td>0.693</td><td>9.186</td></tr><tr><td>(Si<sub>2.800</sub>Al<sub>1.200</sub>)(Mg<sub>2.500</sub>Al<sub>0.400</sub>)</td><td>13</td><td>0.694</td><td>9.187</td></tr><tr><td>(Si<sub>2.775</sub>Al<sub>1.225</sub>)(Mg<sub>2.325</sub>Al<sub>0.525</sub>)</td><td>14</td><td>0.686</td><td>9.171</td></tr><tr><td>(Si<sub>2.862</sub>Al<sub>1.138</sub>)(Mg<sub>2.338</sub>Al<sub>0.488</sub>)</td><td>15</td><td>0.688</td><td>9.172</td></tr><tr><td>(Si<sub>2.687</sub>Al<sub>1.313</sub>)(Mg<sub>2.313</sub>Al<sub>0.563</sub>)</td><td>16</td><td>0.684</td><td>9.168</td></tr><tr><td>(Si<sub>2.600</sub>Al<sub>1.400</sub>)(Mg<sub>2.300</sub>Al<sub>0.600</sub>)</td><td>17</td><td>0.682</td><td>9.165</td></tr><tr><td>(Si<sub>2.512</sub>Al<sub>1.488</sub>)(Mg<sub>2.288</sub>Al<sub>0.638</sub>)</td><td>18</td><td>0.680</td><td>9.162</td></tr><tr><td>(Si<sub>2.425</sub>Al<sub>1.575</sub>)(Mg<sub>2.275</sub>Al<sub>0.675</sub>)</td><td>19</td><td>0.678</td><td>9.159</td></tr><tr><td>(Si<sub>2.400</sub>Al<sub>1.600</sub>)(Mg<sub>2.100</sub>Al<sub>0.800</sub>)</td><td>20</td><td>0.671</td><td>9.160</td></tr><tr><td>(Si<sub>2.500</sub>Al<sub>1.500</sub>)(Mg<sub>2.125</sub>Al<sub>0.750</sub>)<sup>#</sup></td><td>21</td><td>0.672</td><td>9.162</td></tr><tr><td>(Si<sub>2.600</sub>Al<sub>1.400</sub>)(Mg<sub>2.150</sub>Al<sub>0.700</sub>)</td><td>22</td><td>0.675</td><td>9.163</td></tr><tr><td>(Si<sub>2.700</sub>Al<sub>1.300</sub>)(Mg<sub>2.175</sub>Al<sub>0.650</sub>)</td><td>23</td><td>0.677</td><td>9.168</td></tr><tr><td>(Si<sub>2.537</sub>Al<sub>1.463</sub>)(Mg<sub>2.013</sub>Al<sub>0.813</sub>)</td><td>24</td><td>0.667</td><td>9.155</td></tr><tr><td>(Si<sub>2.650</sub>Al<sub>1.350</sub>)(Mg<sub>2.050</sub>Al<sub>0.750</sub>)</td><td>25</td><td>0.670</td><td>9.150</td></tr><tr><td>(Si<sub>2.762</sub>Al<sub>1.238</sub>)(Mg<sub>2.088</sub>Al<sub>0.688</sub>)</td><td>26</td><td>0.674</td><td>9.155</td></tr><tr><td>(Si<sub>2.625</sub>Al<sub>1.375</sub>)(Mg<sub>1.950</sub>Al<sub>0.825</sub>)</td><td>27</td><td>0.665</td><td>9.150</td></tr><tr><td>(Si<sub>2.750</sub>Al<sub>1.250</sub>)(Mg<sub>2.000</sub>Al<sub>0.750</sub>)</td><td>28</td><td>0.670</td><td>9.155</td></tr><tr><td>(Si<sub>4</sub>)(Mg<sub>2.5</sub>)</td><td>29</td><td>0.720</td><td>9.108</td></tr></tbody></table>

### Synthetic K-micas

<table><tbody><tr><td>(Si<sub>2.92</sub>Al<sub>1.08</sub>)(Ni<sub>3</sub>Al<sub>0.04</sub>)</td><td>NiPhl</td><td>0.688</td><td>9.180</td></tr><tr><td>(Si<sub>2.92</sub>Al<sub>1.08</sub>)(Mg<sub>2.98</sub>Al<sub>0.03</sub>)</td><td>Phl</td><td>0.718</td><td>9.204</td></tr><tr><td>(Si<sub>3</sub>Ga)(Mg<sub>3</sub>)</td><td>GaPhl</td><td>0.720</td><td>9.214</td></tr><tr><td>(Si<sub>2.91</sub>Al<sub>1.09</sub>)(Co<sub>2.94</sub>Al<sub>0.06</sub>)</td><td>CoAn</td><td>0.741</td><td>9.247</td></tr><tr><td>(Si<sub>2.91</sub>Al<sub>1.09</sub>)(Mg<sub>2.68</sub>Fe<sub>2</sub><sup>0.33</sup>Al<sub>0.03</sub>)</td><td>A20#2</td><td>0.725</td><td>9.225</td></tr><tr><td>(Si<sub>2.91</sub>Al<sub>1.09</sub>)(Mg<sub>2.68</sub>Fe<sub>2</sub><sup>0.33</sup>Al<sub>0.03</sub>)</td><td>A20#4</td><td>0.725</td><td>9.225</td></tr></tbody></table>

Redhammer & Roth (2002)

<footnote>*typographical error: original (Mg<sub>2.125</sub>)</footnote>
<table><tr><td>(Si<sub>2.96</sub>Al<sub>1.04</sub>)(Mg<sub>2.45</sub>Fe<sup>2+</sup><sub>0.53</sub>Al<sub>0.03</sub>)</td><td>A40</td><td>0.729</td><td>9.231</td></tr><tr><td>(Si<sub>2.91</sub>Al<sub>1.09</sub>)(Mg<sub>2.35</sub>Fe<sup>2+</sup><sub>0.68</sub>Al<sub>0.01</sub>)</td><td>A60</td><td>0.733</td><td>9.247</td></tr><tr><td>(Si<sub>2.97</sub>Al<sub>1.03</sub>)(Mg<sub>2.19</sub>Fe<sup>2+</sup><sub>0.82</sub>Al<sub>0.01</sub>)</td><td>Mga1.2</td><td>0.736</td><td>9.254</td></tr><tr><td>(Si<sub>2.94</sub>Al<sub>1.06</sub>)(Mg<sub>2.51</sub>Fe<sup>2+</sup><sub>0.50</sub>Al<sub>0.01</sub>)</td><td>Mga1.6</td><td>0.729</td><td>9.224</td></tr><tr><td>(Si<sub>2.91</sub>Al<sub>1.09</sub>)(Co<sub>1.67</sub>Ni<sub>1.32</sub>Al<sub>0.04</sub>)</td><td>CoNi1.8</td><td>0.718</td><td>9.220</td></tr><tr><td>(Si<sub>2.28</sub>Al<sub>1.72</sub>)(Al<sub>0.79</sub>Fe<sup>2+</sup><sub>2.18</sub>)</td><td>Sd87</td><td>0.715</td><td>9.289</td></tr></table>

### Synthetic K-(Si₃Al₁)-micas

<table><tr><td>(octahedral composition)</td><td>JLRMgCo</td><td></td><td></td></tr><tr><td>(Co<sub>0.3</sub>Mg<sub>2.7</sub>)</td><td>0.3</td><td>0.723</td><td>9.206</td></tr><tr><td>(Co<sub>0.6</sub>Mg<sub>2.4</sub>)</td><td>0.60</td><td>0.725</td><td>9.205</td></tr><tr><td>(Co<sub>0.6</sub>Mg<sub>2.4</sub>)</td><td>0.60</td><td>0.725</td><td>9.211</td></tr><tr><td>(Co<sub>0.9</sub>Mg<sub>2.1</sub>)</td><td>0.90</td><td>0.728</td><td>9.212</td></tr><tr><td>(Co<sub>1.2</sub>Mg<sub>1.8</sub>)</td><td>1.2</td><td>0.730</td><td>9.216</td></tr><tr><td>(Co<sub>1.5</sub>Mg<sub>1.5</sub>)</td><td>1.5</td><td>0.733</td><td>9.218</td></tr><tr><td>(Co<sub>1.8</sub>Mg<sub>1.2</sub>)</td><td>1.8</td><td>0.735</td><td>9.227</td></tr><tr><td>(Co<sub>2.1</sub>Mg<sub>0.9</sub>)</td><td>2.1</td><td>0.738</td><td>9.237</td></tr><tr><td>(Co<sub>2.4</sub>Mg<sub>0.6</sub>)</td><td>2.4</td><td>0.740</td><td>9.234</td></tr><tr><td>(Co<sub>2.4</sub>Mg<sub>0.6</sub>)</td><td>2.4</td><td>0.740</td><td>9.238</td></tr><tr><td>(Co<sub>2.7</sub>Mg<sub>0.3</sub>)</td><td>2.7</td><td>0.743</td><td>9.244</td></tr><tr><td>(Co<sub>3</sub>)</td><td>3</td><td>0.745</td><td>9.247</td></tr><tr><td></td><td>JLRMgFe</td><td></td><td></td></tr><tr><td>(Mg<sub>3</sub>)</td><td>0</td><td>0.720</td><td>9.204</td></tr><tr><td>(Fe<sub>0.6</sub>Mg<sub>2.4</sub>)</td><td>0.6</td><td>0.732</td><td>9.223</td></tr><tr><td>(Fe<sub>1.2</sub>Mg<sub>1.8</sub>)</td><td>1.2</td><td>0.744</td><td>9.254</td></tr><tr><td>(Fe<sub>1.2</sub>Mg<sub>1.8</sub>)</td><td>1.2</td><td>0.744</td><td>9.262</td></tr><tr><td>(Fe<sub>1.8</sub>Mg<sub>1.2</sub>)</td><td>1.8</td><td>0.756</td><td>9.295</td></tr><tr><td>(Fe<sub>2.4</sub>Mg<sub>0.6</sub>)</td><td>2.4</td><td>0.768</td><td>9.310</td></tr><tr><td>(Fe<sub>3</sub>)</td><td>3</td><td>0.780</td><td>9.350</td></tr><tr><td></td><td>FeNiGR</td><td></td><td></td></tr><tr><td>(Ni<sub>3</sub>)</td><td>3</td><td>0.690</td><td>9.177</td></tr><tr><td>(Fe<sub>0.2</sub>Ni<sub>2.8</sub>)</td><td>2.8</td><td>0.696</td><td>9.191</td></tr><tr><td>(Fe<sub>0.6</sub>Ni<sub>2.4</sub>)</td><td>2.4</td><td>0.708</td><td>9.213</td></tr><tr><td>(Fe<sub>1</sub>Ni<sub>2</sub>)</td><td>2</td><td>0.720</td><td>9.242</td></tr><tr><td>(Fe<sub>1.4</sub>Ni<sub>1.6</sub>)</td><td>1.6</td><td>0.732</td><td>9.261</td></tr><tr><td>(Fe<sub>1.8</sub>Ni<sub>1.2</sub>)</td><td>1.2</td><td>0.744</td><td>9.285</td></tr><tr><td>(Fe<sub>2.2</sub>Ni<sub>0.8</sub>)</td><td>0.8</td><td>0.756</td><td>9.308</td></tr></table>

Mercier *et al.* (2005)

Structure refined
(Fe₂.₆Ni₀.₄) 0.4 0.768 9.329

### Synthetic 2M₁ K-micas series

<table><tr><td>(Si₃.₉₈Al₀.₀₁₃) (Al₁.₀₂Mg₀.₉₇)</td><td>P13-1</td><td>0.625</td><td>9.016</td></tr><tr><td>(Si₃.₉₄Al₀.₀₅₃) (Al₁.₀₅Mg₀.₉₅)</td><td>P17</td><td>0.623</td><td>9.019</td></tr><tr><td>(Si₃.₈₂Al₀.₁₇₇) (Al₁.₁₃Mg₀.₈₃)</td><td>P11-2</td><td>0.614</td><td>9.021</td></tr><tr><td>(Si₃.₈₁Al₀.₁₈₃) (Al₁.₁₈Mg₀.₈₀)</td><td>P18-2</td><td>0.610</td><td>9.028</td></tr><tr><td>(Si₃.₆₆Al₀.₃₃₈) (Al₁.₃₄Mg₀.₆₆)</td><td>P12-1</td><td>0.596</td><td>9.032</td></tr><tr><td>(Si₃.₆₄Al₀.₃₅₈) (Al₁.₃₅Mg₀.₆₅)</td><td>P15</td><td>0.595</td><td>9.031</td></tr><tr><td>(Si₃.₄₇Al₀.₅₂₂) (Al₁.₅₇Mg₀.₄₁₆)</td><td>P28</td><td>0.574</td><td>9.024</td></tr><tr><td>(Si₃.₄₀Al₀.₅₉₉) (Al₁.₅₈Mg₀.₄₄₂)</td><td>P25</td><td>0.575</td><td>9.026</td></tr><tr><td>(Si₃.₂₈Al₀.₇₁₂) (Al₁.₇₀Mg₀.₃₀₈)</td><td>P33</td><td>0.563</td><td>9.022</td></tr><tr><td>(Si₃.₂₁Al₀.₇₈₁) (Al₁.₇₇Mg₀.₂₄₉)</td><td>P30</td><td>0.558</td><td>9.015</td></tr><tr><td>(Si₃.₁₇Al₀.₈₂₄) (Al₁.₇₃Mg₀.₂₉₂)</td><td>P26</td><td>0.561</td><td>9.025</td></tr><tr><td>(Si₃.₁₂Al₀.₈₇₆) (Al₁.₉₁Mg₀.₁₀₈)</td><td>P31</td><td>0.545</td><td>8.998</td></tr><tr><td>(Si₃.₁₁Al₀.₈₈₇) (Al₁.₉₀Mg₀.₉₇)</td><td>P29</td><td>0.544</td><td>8.997</td></tr><tr><td>(Si₃.₈₁Al₀.₁₉) (Al₁.₂₁Mg₀.₇₅Fe²⁺₀.₀₄)</td><td>2M₁ Al-celadonite</td><td>0.609</td><td>9.037</td></tr></table>

### Various synthetic micas (collected data) – K as the main interlayer cation if not specified

<table><tr><td>(Si₃.₄₅Al₀.₅₅) (Al₁.₈₈) Na₀.₉₁</td><td>2</td><td>0.535</td><td>8.890</td></tr><tr><td>(Si₃.₈₄Al₁.₁₆) (Li₀.₇₇Mg₂.₂₃) Ba₀.₉₇ F₂.₀₈</td><td>15</td><td>0.730</td><td>9.157</td></tr><tr><td>(Si₃.₀₇Al₀.₀₃ Fe³⁺₀.₀₉₀) (Fe²⁺₂.₉₇ Fe³⁺₀.₀₃) Cs₀.₈₉</td><td>60</td><td>0.779</td><td>9.506</td></tr><tr><td>(Si₃.₀ Fe³⁺₁.₀) (Fe²⁺₃.₀)</td><td>61</td><td>0.780</td><td>9.404</td></tr><tr><td>(Si₃.₉₈Al₁.₀₂) (Mg₂.₉₇) F₂.₀₈</td><td>72</td><td>0.720</td><td>9.183</td></tr><tr><td>(Si₄.₀) (Li₂.₀ Al₁.₀) F₂.₀</td><td>96</td><td>0.685</td><td>8.968</td></tr><tr><td>(Si₃.₂₅ Al₀.₇₅) (Mg₂.₈₀Li₀.₂₀) F₂.₀</td><td>97</td><td>0.723</td><td>9.210</td></tr><tr><td>(Si₃.₉₈ Al₁.₀₂) (Mg₂.₉₇) F₁.₉₄</td><td>98</td><td>0.720</td><td>9.195</td></tr><tr><td>(Ge₃.₀ Al₁.₀) (Mg₁.₀₄Mn₁.₉₄₆) F₂.₀</td><td>102</td><td>0.775</td><td>9.509</td></tr><tr><td>(Ge₃.₀ Al₁.₀) (Mg₂.₃₆Mn₀.₆₄ Al₁.₀) F₂.₀</td><td>103</td><td>0.743</td><td>9.413</td></tr><tr><td>(Si₄.₀) (Mg₂.₅₀) F₂.₀</td><td>104</td><td>0.720</td><td>9.086</td></tr><tr><td>(Si₄.₀) (Mg₂.₀ Li₁.₀) F₂.₀</td><td>105</td><td>0.733</td><td>9.065</td></tr><tr><td>(Ge₄.₀) (Mg₂.₅) F₂.₀</td><td>106</td><td>0.720</td><td>9.353</td></tr><tr><td>(Ge₄.₀) (Mg₂.₀ Li₁.₀) F₂.₀</td><td>107</td><td>0.733</td><td>9.341</td></tr><tr><td>(Si₃.₅₀ Al₀.₅₀) (Mg₂.₇₅) F₂.₀</td><td>108</td><td>0.720</td><td>9.164</td></tr><tr><td>(Ge₃.₀ Al₁.₀) (Mg₃.₀) F₂.₀</td><td>109</td><td>0.720</td><td>9.345</td></tr></table>

Zviagina & Drits (2019)

selected data from
Schmidt et al. (2001)

Brigatti & Guggenheim (2002)

Structure refined
as named in the paper
paragonite
lithian kinoshitaite
cesium tetra-ferri-annite
tetra-ferri-annite
fluoro phlogopite
polylithionite
Li-containing phlogopite
fluoro phlogopite
tetra Ge-Mn-F phlogopite
tetra Ge-Mn-F phlogopite
tetra-silicic-F phlogopite
tainiolite
tetra-Ge-F phlogopite
tetra-Ge tainiolite
fluoro phlogopite
tetra-Ge-F phlogopite
(Si₂.82 Mn₀.18) (Mg₂.44 Mn₀.24) F₂.₀

110

0.728

9.157

fluoro phlogopite

## Natural micas (anhydrous composition – K as the main interlayer cation if not specified)
### Muscovites and phengites

Zviagina & Drits (2019)

<table><tbody><tr><td>(Si₃.₁₂Al₀.₈₈)(Al₁.₈₈Fe²⁺₀.₁₄Mg₀.₀₁)</td><td>1 - Muscovite 2M₁</td><td>0.553</td><td>9.016</td></tr><tr><td>(Si₃.₀₆Al₀.₉₄)(Al₁.₇₂Fe³⁺₀.₁₅Mg₀.₁₀Ti₀.₀₂Mn³⁺₀.₀₂)</td><td>2 - Muscovite 2M₁</td><td>0.548</td><td>9.018</td></tr><tr><td>(Si₃.₁₆Al₀.₈₄)(Al₁.₈₄Fe³⁺₀.₀₆Fe²⁺₀.₀₁Mg₀.₀₁)</td><td>3 - Muscovite 2M₁</td><td>0.548</td><td>9.000</td></tr><tr><td>(Si₃.₁₀₂Al₀.₉₈)(Al₁.₉₀Fe³⁺₀.₀₂Fe²⁺₀.₀₅Mg₀.₀₆Ti₀.₀₁)</td><td>4 - Muscovite 2M₁</td><td>0.548</td><td>9.008</td></tr><tr><td>(Si₃.₁₀Al₀.₉₀)(Al₁.₈₃Fe²⁺₀.₁₆Mg₀.₀₁)</td><td>5 - Muscovite 2M₁</td><td>0.556</td><td>9.021</td></tr><tr><td>(Si₃.₁₁Al₀.₈₉)(Al₁.₈₆Fe²⁺₀.₀₄Mg₀.₀₈Cr₀.₀₆)</td><td>6 - Muscovite 2M₁</td><td>0.549</td><td>9.011</td></tr><tr><td>(Si₃.₀₉Al₀.₉₁)(Al₁.₈₃Fe²⁺₀.₀₇Mg₀.₀₆)</td><td>7 - Muscovite 2M₁</td><td>0.552</td><td>9.004</td></tr><tr><td>(Si₃.₀₇Al₀.₉₃)(Al₁.₈₈Fe²⁺₀.₀₇Mg₀.₀₆Ti₀.₀₃)</td><td>8 - Muscovite 2M₁</td><td>0.550</td><td>8.996</td></tr><tr><td>(Si₃.₀₃Al₀.₉₇)(Al₁.₈₆Fe³⁺₀.₀₁Fe²⁺₀.₀₆Mg₀.₀₇Ti₀.₀₂)</td><td>9 - Muscovite 2M₁</td><td>0.550</td><td>9.013</td></tr><tr><td>(Si₃.₀₉Al₀.₉₁)(Al₁.₇₁Fe³⁺₀.₁₆Fe²⁺₀.₁₃Mn²⁺₀.₀₁)</td><td>10 - Muscovite 2M₁</td><td>0.561</td><td>9.035</td></tr><tr><td>(Si₃.₂₉₂Al₁.₀₈)(Al₁.₈₈Fe³⁺₀.₀₉Mg₀.₀₅Ti₀.₀₂)</td><td>11 - Muscovite 2M₁</td><td>0.545</td><td>8.991</td></tr><tr><td>(Si₃.₁₈Al₀.₈₂)(Al₁.₆₄Fe³⁺₀.₀₈Fe²⁺₀.₀₈Mg₀.₁₆Ti₀.₀₂)</td><td>12 - Muscovite 2M₁</td><td>0.565</td><td>9.022</td></tr><tr><td>(Si₃.₀₁₈Al₀.₈₂)(Al₁.₇₈Fe²⁺₀.₁₂Mg₀.₀₆Ti₀.₀₄)</td><td>13 - Muscovite 2M₁</td><td>0.557</td><td>8.982</td></tr><tr><td>(Si₃.₃₀Al₀.₇₀)(Al₁.₆₅Fe²⁺₀.₂₉Ti₀.₀₁Mn²⁺₀.₀₇)</td><td>14 - Fe-rich Muscovite 2M₁</td><td>0.581</td><td>9.074</td></tr><tr><td>(Si₃.₂₆Al₀.₇₄)(Al₁.₆₇Fe²⁺₀.₃₄Mg₀.₀₄)</td><td>15 - Fe-rich Muscovite 2M₁</td><td>0.579</td><td>9.052</td></tr><tr><td>(Si₃.₂₅Al₀.₇₅)(Al₁.₆₇Fe²⁺₀.₁₅Mg₀.₂₇Ti₀.₀₁Cr₀.₀₉)</td><td>16 - Mg-rich Muscovite 2M₁</td><td>0.582</td><td>9.043</td></tr><tr><td>(Si₃.₃₈Al₀.₆₂)(Al₁.₅₅Fe²⁺₀.₂₁Mg₀.₂₄Ti₀.₀₂)</td><td>17 - Phengite 2M₁</td><td>0.583</td><td>9.051</td></tr><tr><td>(Si₃.₄₅Al₀.₅₅)(Al₁.₄₂Fe²⁺₀.₂₄Mg₀.₃₃Ti₀.₀₄)</td><td>18 - Phengite 2M₁</td><td>0.595</td><td>9.057</td></tr></tbody></table>

## Dioctahedral true micas (collected data)

Brigatti & Guggenheim (2002)

Single crystal refinement structure

<table><tbody><tr><td>(Si₃.₅₁Al₀.₄₉)(Al₁.₈₃Fe³⁺₀.₀₃Fe²⁺₀.₀₄Mg₀.₁₀Mn₀.₀₄)</td><td>1M space group C2<br>1</td><td>0.556</td><td>8.952</td></tr><tr><td>(Si₃.₁₁Al₀.₈₉)(Al₁.₈₃Fe³⁺₀.₁₂Fe²⁺₀.₃₆Mg₀.₀₆)</td><td>1M space group C2/c<br>4</td><td>0.547</td><td>8.996</td></tr><tr><td>(Si₃.₃₀Al₀.₇₀)(Al₁.₆₅Fe²⁺₀.₂₉Mn₀.₀₇Ti₀.₀₁) F₀.₂₂</td><td>5</td><td>0.581</td><td>9.074</td></tr><tr><td>(Si₃.₁₈Al₀.₈₂)(Al₁.₇₈Fe²⁺₀.₁₂Mg₀.₀₆Ti₀.₀₄)</td><td>6</td><td>0.557</td><td>8.982</td></tr><tr><td>(Si₂.₉₂Al₁.₀₈)(Al₁.₈₈Fe³⁺₀.₀₉Mg₀.₀₃Ti₀.₀₂) F₀.₁₁</td><td>7</td><td>0.545</td><td>8.991</td></tr><tr><td>(Si₃.₀₃Al₀.₉₇)(Al₁.₈₆Fe³⁺₀.₀₁Fe²⁺₀.₀₆Mg₀.₀₇Ti₀.₀₂)</td><td>8</td><td>0.550</td><td>9.013</td></tr><tr><td>(Si₃.₀₉Al₀.₉₁)(Al₁.₇₁Fe³⁺₀.₁₆Fe²⁺₀.₁₃Mn₀.₀₁) F₀.₂₂</td><td>9</td><td>0.561</td><td>9.035</td></tr><tr><td>(Si₃.₁₈Al₀.₈₂)(Al₁.₈₃Fe²⁺₀.₀₇Mg₀.₀₇Ti₀.₀₆)</td><td>10</td><td>0.552</td><td>9.005</td></tr><tr><td>(Si₃.₀₇Al₀.₉₃)(Al₁.₈₈Fe²⁺₀.₀₇Mg₀.₀₆Ti₀.₀₃) F₀.₁₉</td><td>11</td><td>0.550</td><td>8.996</td></tr><tr><td>(Si₃.₀₉Al₀.₉₁)(Al₁.₈₃Fe²⁺₀.₀₇Mg₀.₀₇Ti₀.₀₆) F₀.₂₃</td><td>12</td><td>0.552</td><td>9.004</td></tr><tr><td>(Si₃.₁₇Al₀.₈₃)(Al₁.₇₈Fe²⁺₀.₁₃Mg₀.₁₅Ti₀.₀₄) F₀.₁₉</td><td>13</td><td>0.565</td><td>9.003</td></tr></tbody></table>

as named in the paper

muscovite

muscovite

muscovite

muscovite

muscovite

muscovite

muscovite

muscovite

muscovite

muscovite

muscovite

muscovite

muscovite
<table><tbody><tr><td>(Si<sub>2.87</sub>Al<sub>1.13</sub>) (Al<sub>1.80</sub>Fe<sup>2+</sup><sub>0.07</sub>Mg<sub>0.15</sub>Ti<sub>0.05</sub>) F<sub>0.41</sub></td><td>14</td><td>0.558</td><td>8.997</td></tr><tr><td>(Si<sub>3.18</sub>Al<sub>0.82</sub>) (Al<sub>1.64</sub>Fe<sup>3+</sup><sub>0.08</sub>Fe<sup>2+</sup><sub>0.08</sub>Mg<sub>0.16</sub>Ti<sub>0.04</sub>)</td><td>15</td><td>0.565</td><td>9.022</td></tr><tr><td>(Si<sub>3.11</sub>Al<sub>0.89</sub>) (Al<sub>1.86</sub>Cr<sub>0.06</sub>Fe<sup>2+</sup><sub>0.04</sub>Mg<sub>0.08</sub>Ti<sub>0.04</sub>)</td><td>16</td><td>0.550</td><td>9.011</td></tr><tr><td>(Si<sub>3.07</sub>Al<sub>0.93</sub>) (Al<sub>1.84</sub>Cr<sub>0.10</sub>Fe<sup>2+</sup><sub>0.02</sub>Mg<sub>0.02</sub>Ti<sub>0.02</sub>)</td><td>17</td><td>0.544</td><td>8.979</td></tr><tr><td>(Si<sub>3.14</sub>Al<sub>0.86</sub>) (Al<sub>1.83</sub>Cr<sub>0.11</sub>Fe<sup>2+</sup><sub>0.10</sub>Mg<sub>0.11</sub>Ti<sub>0.03</sub>)</td><td>18</td><td>0.561</td><td>9.040</td></tr><tr><td>(Si<sub>3.02</sub>Al<sub>0.98</sub>) (Al<sub>0.27</sub>Cr<sub>1.42</sub>Fe<sup>2+</sup><sub>0.01</sub>Mg<sub>0.18</sub>V<sub>0.13</sub>) F<sub>0.30</sub></td><td>30</td><td>0.616</td><td>9.103</td></tr><tr><td>(Si<sub>3.09</sub>Al<sub>0.91</sub>) (Al<sub>1.93</sub>Fe<sup>2+</sup><sub>0.01</sub>Mg<sub>0.01</sub>Mn<sub>0.01</sub>) F<sub>0.12</sub></td><td>33</td><td>0.539</td><td>8.950</td></tr><tr><td>(Si<sub>3.02</sub>Al<sub>0.98</sub>) (Al<sub>1.90</sub>Fe<sup>3+</sup><sub>0.02</sub>Fe<sup>2+</sup><sub>0.05</sub>Mg<sub>0.06</sub>Ti<sub>0.02</sub>)</td><td>36</td><td>0.548</td><td>9.008</td></tr><tr><td>(Si<sub>3.39</sub>Al<sub>0.61</sub>) (Al<sub>1.45</sub>Fe<sup>3+</sup><sub>0.05</sub>Fe<sup>2+</sup><sub>0.09</sub>Mg<sub>0.50</sub>Ti<sub>0.01</sub>)</td><td>37</td><td>0.593</td><td>9.038</td></tr><tr><td>(Si<sub>2.94</sub>Al<sub>1.06</sub>) (Al<sub>1.99</sub>Fe<sub>0.03</sub>Mg<sub>0.01</sub>Ti<sub>0.003</sub>) (K<sub>0.04</sub>Na<sub>0.92</sub>Ca<sub>0.02</sub>)</td><td>39</td><td>0.538</td><td>8.898</td></tr><tr><td>(Si<sub>3.01</sub>Al<sub>0.68</sub>Fe<sup>3+</sup><sub>0.14</sub>) (Al<sub>1.87</sub>Mn<sup>3+</sup><sub>0.03</sub>Mg<sub>0.06</sub>Ti<sub>0.01</sub>) F<sub>0.14</sub></td><td>45</td><td>0.542</td><td>9.027</td></tr><tr><td>(Si<sub>3.09</sub>Al<sub>0.91</sub>) (Al<sub>1.81</sub>Fe<sup>2+</sup><sub>0.14</sub>Mg<sub>0.12</sub>) F<sub>0.19</sub></td><td>46</td><td>0.562</td><td>9.015</td></tr><tr><td>(Si<sub>2.98</sub>Al<sub>1.02</sub>) (Al<sub>1.93</sub>Fe<sup>2+</sup><sub>0.02</sub>Mg<sub>0.10</sub>) (K<sub>0.10</sub>Na<sub>0.60</sub>Ca<sub>0.03</sub>)</td><td>48</td><td>0.546</td><td>8.894</td></tr><tr><td colspan="4">2M<sub>2</sub> space group C2/c</td></tr><tr><td>(Si<sub>3.16</sub>Al<sub>0.84</sub>) (Al<sub>1.64</sub>Fe<sup>2+</sup><sub>0.17</sub>Mg<sub>0.22</sub>Li<sub>0.15</sub>) (K<sub>0.06</sub>Cs<sub>0.88</sub>Rb<sub>0.01</sub>) F<sub>0.21</sub></td><td>49</td><td>0.588</td><td>9.076</td></tr><tr><td colspan="4">3T space group P3<sub>1</sub>12</td></tr><tr><td>(Si<sub>3.34</sub>Al<sub>0.56</sub>) (Al<sub>1.54</sub>Fe<sub>0.25</sub>Mg<sub>0.21</sub>Ti<sub>0.04</sub>)</td><td>51</td><td>0.563</td><td>9.028</td></tr><tr><td>(Si<sub>3.54</sub>Al<sub>0.46</sub>) (Al<sub>1.41</sub>Mg<sub>0.60</sub>Ti<sub>0.02</sub>)</td><td>52</td><td>0.590</td><td>9.033</td></tr><tr><td>(Si<sub>3.11</sub>Al<sub>0.89</sub>) (Al<sub>1.04</sub>Fe<sup>2+</sup><sub>0.04</sub>Mg<sub>0.09</sub>Ti<sub>0.01</sub>)</td><td>53</td><td>0.551</td><td>9.000</td></tr><tr><td>(Si<sub>2.96</sub>Al<sub>1.04</sub>) (Al<sub>2.02</sub>Fe<sup>3+</sup><sub>0.01</sub>Mg<sub>0.01</sub>) (K<sub>0.16</sub>Na<sub>0.71</sub>Ca<sub>0.03</sub>)</td><td>54</td><td>0.536</td><td>8.889</td></tr><tr><td colspan="4">Dioctahedral brittle micas (collected data)</td></tr><tr><td colspan="4">2M<sub>1</sub> space group Cc</td></tr><tr><td>(Si<sub>2.11</sub>Al<sub>1.89</sub>) (Al<sub>1.99</sub>Fe<sup>2+</sup><sub>0.01</sub>Mg<sub>0.03</sub>) Ca<sub>0.81</sub>Na<sub>0.19</sub></td><td>19</td><td>0.539</td><td>8.828</td></tr><tr><td>(Si<sub>1.92</sub>Al<sub>2.08</sub>) (Al<sub>1.96</sub>Fe<sub>0.03</sub>Mg<sub>0.10</sub>Li<sub>0.12</sub>) Ca<sub>0.73</sub>Na<sub>0.23</sub></td><td>21</td><td>0.557</td><td>8.857</td></tr><tr><td colspan="4">Trioctahedral true micas (collected data)</td></tr><tr><td colspan="4">1M space group C2/m</td></tr><tr><td>(Si<sub>2.74</sub>Al<sub>1.26</sub>) (Al<sub>0.24</sub> Fe<sup>3+</sup><sub>0.009</sub>Fe<sup>2+</sup><sub>0.12</sub>Mg<sub>2.48</sub>Mn<sub>0.01</sub>Ti<sub>0.02</sub>)</td><td>1</td><td>0.705</td><td>9.195</td></tr><tr><td>(Si<sub>2.65</sub>Al<sub>1.35</sub>) (Al<sub>0.24</sub> Fe<sup>3+</sup><sub>0.007</sub>Fe<sup>2+</sup><sub>0.11</sub>Mg<sub>2.55</sub>Mn<sub>0.01</sub>Ti<sub>0.02</sub>)</td><td>2</td><td>0.705</td><td>9.180</td></tr><tr><td>(Si<sub>2.60</sub>Al<sub>1.40</sub>) (Al<sub>0.18</sub> Fe<sup>3+</sup><sub>0.15</sub>Fe<sup>2+</sup><sub>0.03</sub>Mg<sub>2.63</sub>Ti<sub>0.01</sub>)</td><td>3</td><td>0.705</td><td>9.189</td></tr><tr><td>(Si<sub>2.50</sub>Al<sub>1.50</sub>) (Al<sub>0.47</sub>Fe<sup>3+</sup><sub>0.15</sub>Fe<sup>2+</sup><sub>0.07</sub>Mg<sub>2.23</sub>Mn<sub>0.04</sub>Ti<sub>0.01</sub>)</td><td>4</td><td>0.692</td><td>8.179</td></tr><tr><td>(Si<sub>2.60</sub>Al<sub>1.40</sub>) (Al<sub>0.20</sub> Fe<sup>3+</sup><sub>0.11</sub>Fe<sup>2+</sup><sub>0.04</sub>Mg<sub>2.64</sub>Mn<sub>0.01</sub>)</td><td>5</td><td>0.706</td><td>9.199</td></tr><tr><td>(Si<sub>2.81</sub>Al<sub>1.39</sub>) (Al<sub>0.05</sub> Fe<sup>3+</sup><sub>0.50</sub>Fe<sup>2+</sup><sub>0.70</sub>Mg<sub>1.54</sub>Mn<sub>0.02</sub>Ti<sub>0.20</sub>)</td><td>6</td><td>0.712</td><td>9.244</td></tr><tr><td>(Si<sub>2.50</sub>Al<sub>1.37</sub> Fe<sup>3+</sup><sub>0.13</sub>) (Fe<sup>2+</sup><sub>1.05</sub>Mg<sub>0.92</sub>Mn<sub>0.01</sub>Ti<sub>0.67</sub>)</td><td>7</td><td>0.715</td><td>9.244</td></tr><tr><td>(Si<sub>2.78</sub>Al<sub>1.19</sub> Fe<sup>3+</sup><sub>0.03</sub>) (Fe<sup>3+</sup><sub>0.45</sub>Fe<sup>2+</sup><sub>0.79</sub>Mg<sub>1.43</sub>Mn<sub>0.01</sub>Ti<sub>0.23</sub>Li<sub>0.01</sub>)</td><td>8</td><td>0.717</td><td>9.258</td></tr><tr><td>(Si<sub>2.80</sub>Al<sub>1.20</sub>) (Al<sub>0.01</sub>Fe<sup>3+</sup><sub>0.46</sub>Fe<sup>2+</sup><sub>0.71</sub>Mg<sub>1.50</sub>Mn<sub>0.03</sub>Ti<sub>0.15</sub>Li<sub>0.01</sub>)</td><td>9</td><td>0.719</td><td>9.353</td></tr></tbody></table>

muscovite
muscovite
Cr-containing muscovite
Cr-containing muscovite
Cr-containing muscovite
chromphyllite
muscovite
muscovite
magnesian muscovite
paragonite
muscovite
muscovite
muscovite
paragonite
nanpingite
muscovite
magnesian muscovite
muscovite
paragonite
margarite
margarite
phlogopite
phlogopite
phlogopite
Al-phlogopite
phlogopite
ferroan phlogopite
magnesian annite
ferroan phlogopite
ferroan phlogopite
<table>
  <tbody>
    <tr>
      <td>(Si<sub>2.79</sub>Al<sub>1.21</sub>) (Al<sub>0.05</sub>Fe<sup>3+</sup><sub>0.39</sub>Fe<sup>2+</sup><sub>0.95</sub> Mg<sub>1.35</sub>Mn<sub>0.03</sub>Ti<sub>0.20</sub>Li<sub>0.01</sub>)</td>
      <td>10</td>
      <td>0.695</td>
      <td>9.242</td>
    </tr>
    <tr>
      <td>(Si<sub>2.74</sub>Al<sub>1.26</sub>) (Al<sub>0.02</sub>Fe<sup>3+</sup><sub>0.36</sub>Fe<sup>2+</sup><sub>0.86</sub> Mg<sub>1.39</sub>Mn<sub>0.02</sub>Ti<sub>0.25</sub>Li<sub>0.01</sub>)</td>
      <td>11</td>
      <td>0.718</td>
      <td>9.258</td>
    </tr>
    <tr>
      <td>(Si<sub>2.85</sub>Al<sub>1.15</sub>) (Al<sub>0.05</sub>Fe<sup>3+</sup><sub>0.34</sub>Fe<sup>2+</sup><sub>0.91</sub> Mg<sub>1.35</sub>Mn<sub>0.03</sub>Ti<sub>0.23</sub>Li<sub>0.02</sub>)</td>
      <td>12</td>
      <td>0.718</td>
      <td>9.251</td>
    </tr>
    <tr>
      <td>(Si<sub>2.94</sub>Al<sub>1.06</sub>) (Al<sub>0.01</sub>Fe<sup>3+</sup><sub>0.18</sub>Fe<sup>2+</sup><sub>0.06</sub> Mg<sub>2.33</sub>Mn<sub>0.01</sub>Ti<sub>0.41</sub>) F<sub>0.79</sub></td>
      <td>13</td>
      <td>0.700</td>
      <td>9.207</td>
    </tr>
    <tr>
      <td>(Si<sub>2.68</sub>Al<sub>1.32</sub>) (Al<sub>0.93</sub>Fe<sup>3+</sup><sub>0.41</sub>Fe<sup>2+</sup><sub>0.39</sub> Mg<sub>1.10</sub>Mn<sub>0.03</sub>Ti<sub>0.14</sub>)</td>
      <td>14</td>
      <td>0.656</td>
      <td>9.219</td>
    </tr>
    <tr>
      <td>(Si<sub>2.68</sub>Al<sub>1.32</sub>) (Al<sub>0.14</sub>Fe<sup>3+</sup><sub>0.38</sub>Fe<sup>2+</sup><sub>0.31</sub> Mg<sub>2.00</sub>Mn<sub>0.01</sub>Ti<sub>0.17</sub>)</td>
      <td>15</td>
      <td>0.702</td>
      <td>9.222</td>
    </tr>
    <tr>
      <td>(Si<sub>3.25</sub>Al<sub>0.75</sub>) (Fe<sup>2+</sup><sub>0.74</sub> Mg<sub>1.70</sub>Mn<sub>0.01</sub>Ti<sub>0.49</sub>) F<sub>0.31</sub></td>
      <td>16</td>
      <td>0.716</td>
      <td>9.245</td>
    </tr>
    <tr>
      <td>(Si<sub>2.75</sub>Al<sub>1.25</sub>) (Al<sub>0.02</sub>Fe<sup>3+</sup><sub>0.39</sub>Fe<sup>2+</sup><sub>0.60</sub> Mg<sub>1.61</sub>Mn<sub>0.01</sub>Ti<sub>0.37</sub>) F<sub>0.23</sub></td>
      <td>17</td>
      <td>0.707</td>
      <td>9.230</td>
    </tr>
    <tr>
      <td>(Si<sub>2.65</sub>Al<sub>1.35</sub>) (Al<sub>0.12</sub>Fe<sup>3+</sup><sub>0.47</sub>Fe<sup>2+</sup><sub>0.42</sub> Mg<sub>1.85</sub>Mn<sub>0.01</sub>Ti<sub>0.14</sub>)</td>
      <td>18</td>
      <td>0.704</td>
      <td>9.219</td>
    </tr>
    <tr>
      <td>(Si<sub>2.62</sub>Al<sub>1.38</sub>) (Al<sub>0.13</sub>Fe<sup>3+</sup><sub>0.72</sub>Fe<sup>2+</sup><sub>0.30</sub> Mg<sub>1.67</sub>Mn<sub>0.01</sub>Ti<sub>0.18</sub>)</td>
      <td>19</td>
      <td>0.701</td>
      <td>9.224</td>
    </tr>
    <tr>
      <td>(Si<sub>2.59</sub>Al<sub>1.41</sub>) (Al<sub>0.24</sub>Fe<sup>3+</sup><sub>0.23</sub>Fe<sup>2+</sup><sub>0.76</sub> Mg<sub>1.58</sub>Ti<sub>0.17</sub>)</td>
      <td>20</td>
      <td>0.708</td>
      <td>9.241</td>
    </tr>
    <tr>
      <td>(Si<sub>2.86</sub>Al<sub>1.14</sub>) (Al<sub>0.22</sub>Cr<sub>0.05</sub>Fe<sup>2+</sup><sub>0.39</sub> Mg<sub>2.17</sub>Mn<sub>0.02</sub>Ti<sub>0.14</sub>) F<sub>0.20</sub></td>
      <td>21</td>
      <td>0.708</td>
      <td>9.207</td>
    </tr>
    <tr>
      <td>(Si<sub>2.91</sub>Al<sub>1.09</sub>) (Cr<sub>0.03</sub>Fe<sup>2+</sup><sub>0.28</sub> Mg<sub>2.42</sub>Mn<sub>0.01</sub>Ti<sub>0.1</sub>) F<sub>0.72</sub></td>
      <td>22</td>
      <td>0.718</td>
      <td>9.190</td>
    </tr>
    <tr>
      <td>(Si<sub>2.93</sub>Al<sub>1.07</sub>) (Al<sub>0.09</sub>Cr<sub>0.05</sub>Fe<sup>2+</sup><sub>0.59</sub> Mg<sub>1.60</sub>Mn<sub>0.03</sub>Ti<sub>0.52</sub>) F<sub>0.57</sub></td>
      <td>23</td>
      <td>0.706</td>
      <td>9.228</td>
    </tr>
    <tr>
      <td>(Si<sub>2.87</sub>Al<sub>1.13</sub>) (Al<sub>0.15</sub>Cr<sub>0.07</sub>Fe<sup>2+</sup><sub>0.50</sub> Mg<sub>1.90</sub>Mn<sub>0.03</sub>Ti<sub>0.33</sub>) F<sub>0.30</sub></td>
      <td>24</td>
      <td>0.707</td>
      <td>9.204</td>
    </tr>
    <tr>
      <td>(Si<sub>2.90</sub>Al<sub>1.10</sub>) (Al<sub>0.04</sub>Cr<sub>0.05</sub>Fe<sup>2+</sup><sub>0.50</sub> Mg<sub>2.09</sub>Mn<sub>0.02</sub>Ti<sub>0.27</sub>) F<sub>0.44</sub></td>
      <td>25</td>
      <td>0.717</td>
      <td>9.190</td>
    </tr>
    <tr>
      <td>(Si<sub>2.73</sub>Al<sub>1.27</sub>) (Al<sub>0.01</sub>Cr<sub>0.01</sub>Fe<sup>2+</sup><sub>0.94</sub> Mg<sub>1.48</sub>Mn<sub>0.02</sub>Ti<sub>0.39</sub>)</td>
      <td>26</td>
      <td>0.724</td>
      <td>9.235</td>
    </tr>
    <tr>
      <td>(Si<sub>2.81</sub>Al<sub>1.19</sub>) (Al<sub>0.08</sub>Cr<sub>0.01</sub>Fe<sup>2+</sup><sub>1.24</sub> Mg<sub>1.40</sub>Mn<sub>0.02</sub>Ti<sub>0.23</sub>) F<sub>0.31</sub></td>
      <td>27</td>
      <td>0.731</td>
      <td>9.256</td>
    </tr>
    <tr>
      <td>(Si<sub>2.76</sub>Al<sub>1.24</sub>) (Al<sub>0.19</sub>Cr<sub>0.01</sub>Fe<sup>2+</sup><sub>1.30</sub> Mg<sub>1.24</sub>Mn<sub>0.01</sub>Ti<sub>0.20</sub>)</td>
      <td>28</td>
      <td>0.727</td>
      <td>9.215</td>
    </tr>
    <tr>
      <td>(Si<sub>2.84</sub>Al<sub>1.04</sub> Fe<sup>3+</sup><sub>0.12</sub>) (Fe<sup>3+</sup><sub>0.16</sub>Fe<sup>2+</sup><sub>0.09</sub> Mg<sub>2.65</sub>Ti<sub>0.08</sub>)</td>
      <td>29</td>
      <td>0.715</td>
      <td>9.211</td>
    </tr>
    <tr>
      <td>(Si<sub>2.82</sub>Al<sub>1.13</sub> Fe<sup>3+</sup><sub>0.05</sub>) (Fe<sup>3+</sup><sub>0.22</sub>Fe<sup>2+</sup><sub>0.09</sub> Mg<sub>2.60</sub>Ti<sub>0.09</sub>)</td>
      <td>30</td>
      <td>0.713</td>
      <td>9.230</td>
    </tr>
    <tr>
      <td>(Si<sub>2.81</sub>Al<sub>1.14</sub> Fe<sup>3+</sup><sub>0.05</sub>) (Fe<sup>3+</sup><sub>0.23</sub>Fe<sup>2+</sup><sub>0.09</sub> Mg<sub>2.57</sub>Ti<sub>0.10</sub>)</td>
      <td>31</td>
      <td>0.712</td>
      <td>9.219</td>
    </tr>
    <tr>
      <td>(Si<sub>2.71</sub>Al<sub>1.20</sub> Fe<sup>3+</sup><sub>0.24</sub>) (Fe<sup>3+</sup><sub>0.24</sub>Fe<sup>2+</sup><sub>0.62</sub> Mg<sub>1.90</sub>Mn<sub>0.02</sub>Ti<sub>0.18</sub>)</td>
      <td>32</td>
      <td>0.720</td>
      <td>9.244</td>
    </tr>
    <tr>
      <td>(Si<sub>3.11</sub>Fe<sup>3+</sup><sub>0.89</sub>) (Fe<sup>3+</sup><sub>0.05</sub>Fe<sup>2+</sup><sub>0.17</sub>Mg<sub>2.70</sub>Ti<sub>0.01</sub>) F<sub>0.14</sub></td>
      <td>33</td>
      <td>0.722</td>
      <td>9.270</td>
    </tr>
    <tr>
      <td>(Si<sub>3.07</sub>Fe<sup>3+</sup><sub>0.93</sub>) (Fe<sup>3+</sup><sub>0.06</sub>Fe<sup>2+</sup><sub>0.17</sub>Mg<sub>2.75</sub>Mn<sub>0.01</sub>Ti<sub>0.01</sub>)</td>
      <td>34</td>
      <td>0.723</td>
      <td>9.277</td>
    </tr>
    <tr>
      <td>(Si<sub>2.82</sub>Al<sub>1.11</sub> Fe<sup>3+</sup><sub>0.07</sub>) (Fe<sup>3+</sup><sub>0.15</sub>Fe<sup>2+</sup><sub>0.08</sub> Mg<sub>2.68</sub>Mn<sub>0.01</sub>Ti<sub>0.08</sub>) F<sub>0.11</sub></td>
      <td>35</td>
      <td>0.715</td>
      <td>9.239</td>
    </tr>
    <tr>
      <td>(Si<sub>2.85</sub>Al<sub>1.07</sub> Fe<sup>3+</sup><sub>0.08</sub>) (Fe<sup>3+</sup><sub>0.19</sub>Fe<sup>2+</sup><sub>0.07</sub> Mg<sub>2.68</sub>Ti<sub>0.05</sub>)</td>
      <td>36</td>
      <td>0.715</td>
      <td>9.214</td>
    </tr>
    <tr>
      <td>(Si<sub>2.85</sub>Al<sub>1.10</sub> Fe<sup>3+</sup><sub>0.05</sub>) (Fe<sup>3+</sup><sub>0.21</sub>Fe<sup>2+</sup><sub>0.07</sub> Mg<sub>2.64</sub>Mn<sub>0.01</sub>Ti<sub>0.06</sub>)</td>
      <td>37</td>
      <td>0.714</td>
      <td>9.235</td>
    </tr>
    <tr>
      <td>(Si<sub>2.76</sub>Al<sub>1.19</sub> Fe<sup>3+</sup><sub>0.05</sub>) (Fe<sup>3+</sup><sub>0.30</sub>Fe<sup>2+</sup><sub>0.38</sub> Mg<sub>2.17</sub>Mn<sub>0.01</sub>Ti<sub>0.13</sub>)</td>
      <td>38</td>
      <td>0.715</td>
      <td>9.238</td>
    </tr>
    <tr>
      <td>(Si<sub>2.74</sub>Al<sub>1.15</sub> Fe<sup>3+</sup><sub>0.11</sub>) (Fe<sup>3+</sup><sub>0.25</sub>Fe<sup>2+</sup><sub>0.34</sub> Mg<sub>2.19</sub>Mn<sub>0.01</sub>Ti<sub>0.13</sub>)</td>
      <td>39</td>
      <td>0.716</td>
      <td>9.228</td>
    </tr>
    <tr>
      <td>(Si<sub>2.91</sub>Al<sub>0.71</sub> Fe<sup>3+</sup><sub>0.38</sub>) (Fe<sup>3+</sup><sub>0.10</sub>Fe<sup>2+</sup><sub>0.22</sub>Mg<sub>2.64</sub>Mn<sub>0.01</sub>Ti<sub>0.03</sub>)</td>
      <td>40</td>
      <td>0.721</td>
      <td>9.247</td>
    </tr>
    <tr>
      <td>(Si<sub>3.15</sub>Al<sub>0.04</sub> Fe<sup>3+</sup><sub>0.81</sub>) (Fe<sup>3+</sup><sub>0.23</sub>Fe<sup>2+</sup><sub>0.20</sub>Mg<sub>2.54</sub>Ti<sub>0.02</sub>)</td>
      <td>41</td>
      <td>0.717</td>
      <td>9.284</td>
    </tr>
    <tr>
      <td>(Si<sub>3.05</sub> Fe<sup>3+</sup><sub>0.95</sub>) (Fe<sup>3+</sup><sub>0.08</sub>Fe<sup>2+</sup><sub>0.17</sub>Mg<sub>2.73</sub>Ti<sub>0.01</sub>)</td>
      <td>42</td>
      <td>0.721</td>
      <td>9.288</td>
    </tr>
    <tr>
      <td>(Si<sub>3.05</sub> Fe<sup>3+</sup><sub>0.95</sub>) (Fe<sup>3+</sup><sub>0.11</sub>Fe<sup>2+</sup><sub>0.20</sub>Mg<sub>2.68</sub>Mn<sub>0.01</sub>)</td>
      <td>43</td>
      <td>0.722</td>
      <td>9.292</td>
    </tr>
    <tr>
      <td>(Si<sub>2.77</sub>Al<sub>1.23</sub>) (Al<sub>0.18</sub>Fe<sup>3+</sup><sub>0.18</sub>Fe<sup>2+</sup><sub>1.01</sub> Mg<sub>1.26</sub>Mn<sub>0.02</sub>Ti<sub>0.28</sub>)</td>
      <td>44</td>
      <td>0.714</td>
      <td>9.252</td>
    </tr>
    <tr>
      <td>(Si<sub>2.85</sub>Al<sub>1.5</sub>) (Al<sub>0.21</sub>Fe<sup>2+</sup><sub>1.37</sub> Mg<sub>1.15</sub>Mn<sub>0.03</sub>Ti<sub>0.25</sub>) F<sub>0.16</sub></td>
      <td>45</td>
      <td>0.726</td>
      <td>9.263</td>
    </tr>
    <tr>
      <td>(Si<sub>2.82</sub>Al<sub>1.18</sub>) (Al<sub>0.18</sub>Fe<sup>3+</sup><sub>0.13</sub>Fe<sup>2+</sup><sub>1.20</sub> Mg<sub>1.19</sub>Mn<sub>0.02</sub>Ti<sub>0.29</sub>) F<sub>0.14</sub></td>
      <td>46</td>
      <td>0.719</td>
      <td>9.258</td>
    </tr>
  </tbody>
</table>

ferroan phlogopite
ferroan phlogopite
ferroan phlogopite
titanian phlogopite
Al-phlogopite
ferrian phlogopite
ferroan phlogopite
ferroan phlogopite
ferrian phlogopite
ferrian phlogopite
ferroan phlogopite
ferroan phlogopite
phlogopite
ferroan phlogopite
ferroan phlogopite
ferroan phlogopite
ferroan phlogopite
ferroan phlogopite
magnesian annite
phlogopite
phlogopite
phlogopite
ferroan phlogopite
tetra-ferriphlogopite
tetra-ferriphlogopite
phlogopite
phlogopite
phlogopite
ferroan phlogopite
tetra-ferriphlogopite
tetra-ferriphlogopite
tetra-ferriphlogopite
ferroan phlogopite
magnesian annite
magnesian annite
<table>
  <tr>
    <td>(Si<sub>2.77</sub>Al<sub>1.23</sub>) (Al<sub>0.31</sub> Fe<sup>3+0.16</sup>Fe<sup>2+1.10</sup> Mg<sub>1.23</sub> Mn<sub>0.01</sub>Ti<sub>0.19</sub>) F<sub>0.12</sub></td>
    <td>47</td>
    <td>0.712</td>
    <td>9.260</td>
  </tr>
  <tr>
    <td>(Si<sub>2.76</sub>Al<sub>1.17</sub> Fe<sup>3+0.07</sup>) (Fe<sup>3+0.23</sup>Fe<sup>2+0.38</sup>Mg<sub>2.25</sub> Mn<sub>0.01</sub>Ti<sub>0.13</sub>)</td>
    <td>48</td>
    <td>0.717</td>
    <td>9.230</td>
  </tr>
  <tr>
    <td>(Si<sub>2.90</sub>Al<sub>1.06</sub> Fe<sup>3+0.04</sup>) (Fe<sup>3+0.20</sup>Fe<sup>2+0.11</sup>Mg<sub>2.59</sub> Mn<sub>0.01</sub>Ti<sub>0.05</sub>)</td>
    <td>49</td>
    <td>0.716</td>
    <td>9.219</td>
  </tr>
  <tr>
    <td>(Si<sub>3.01</sub>Al<sub>0.13</sub> Fe<sup>3+0.86</sup>) (Fe<sup>3+0.30</sup>Fe<sup>2+0.54</sup>Mg<sub>1.99</sub> Mn<sub>0.02</sub>Ti<sub>0.01</sub>)</td>
    <td>50</td>
    <td>0.724</td>
    <td>9.306</td>
  </tr>
  <tr>
    <td>(Si<sub>2.71</sub>Al<sub>1.29</sub>) (Al<sub>0.35</sub>Fe<sup>3+0.01</sup>Fe<sup>2+1.45</sup> Mg<sub>0.77</sub>Mn<sub>0.04</sub>Ti<sub>0.21</sub>)</td>
    <td>51</td>
    <td>0.721</td>
    <td>9.268</td>
  </tr>
  <tr>
    <td>(Si<sub>2.62</sub>Al<sub>1.38</sub>) (Al<sub>0.54</sub>Fe<sup>3+0.01</sup>Fe<sup>2+1.41</sup> Mg<sub>0.83</sub>Mn<sub>0.03</sub>Ti<sub>0.17</sub>)</td>
    <td>52</td>
    <td>0.709</td>
    <td>9.239</td>
  </tr>
  <tr>
    <td>(Si<sub>2.63</sub>Al<sub>1.37</sub>) (Al<sub>0.48</sub>Fe<sup>2+1.48</sup> Mg<sub>0.70</sub>Mn<sub>0.06</sub>Ti<sub>0.20</sub>)</td>
    <td>53</td>
    <td>0.714</td>
    <td>9.257</td>
  </tr>
  <tr>
    <td>(Si<sub>2.68</sub>Al<sub>1.32</sub>) (Al<sub>0.64</sub>Fe<sup>2+1.33</sup> Mg<sub>0.73</sub>Mn<sub>0.04</sub>Ti<sub>0.17</sub>)</td>
    <td>54</td>
    <td>0.702</td>
    <td>9.222</td>
  </tr>
  <tr>
    <td>(Si<sub>2.69</sub>Al<sub>1.31</sub>) (Al<sub>0.60</sub>Fe<sup>2+1.36</sup> Mg<sub>0.73</sub>Mn<sub>0.02</sub>Ti<sub>0.14</sub>) 0.12</td>
    <td>55</td>
    <td>0.705</td>
    <td>9.232</td>
  </tr>
  <tr>
    <td>(Si<sub>2.72</sub>Al<sub>1.28</sub>) (Al<sub>0.50</sub>Fe<sup>2+1.46</sup> Mg<sub>0.70</sub>Mn<sub>0.03</sub>Ti<sub>0.16</sub>) F<sub>0.15</sub></td>
    <td>56</td>
    <td>0.713</td>
    <td>9.256</td>
  </tr>
  <tr>
    <td>(Si<sub>3.49</sub>Al<sub>0.51</sub>) (Li<sub>1.48</sub>Fe<sup>2+0.02</sup>Fe<sup>3+0.008</sup> Mg<sub>0.05</sub>Mn<sub>0.03</sub> Al<sub>1.30</sub>)</td>
    <td>62</td>
    <td>0.659</td>
    <td>9.011</td>
  </tr>
  <tr>
    <td>(Si<sub>2.75</sub>Al<sub>1.15</sub> Fe<sup>3+0.07</sup> Ti<sub>0.03</sub>) (Fe<sup>3+0.06</sup>Fe<sup>2+0.20</sup>Mg<sub>1.74</sub>Mn<sup>2+0.95</sup>Mn<sup>3+0.18</sup>)</td>
    <td>63</td>
    <td>0.756</td>
    <td>9.295</td>
  </tr>
  <tr>
    <td>(Si<sub>2.91</sub>Al<sub>1.09</sub>) (Al<sub>0.38</sub>Fe<sup>2+1.00</sup>Mg<sub>1.90</sub> Li<sub>0.34</sub>Mn<sub>0.04</sub>Ti<sub>0.05</sub>)(K<sub>0.46</sub>Cs<sub>0.23</sub>Rb<sub>0.28</sub>)F<sub>0.45</sub></td>
    <td>65</td>
    <td>0.721</td>
    <td>9.247</td>
  </tr>
  <tr>
    <td>(Si<sub>2.81</sub>Al<sub>1.19</sub>) (Al<sub>0.09</sub>Fe<sup>3+0.19</sup> Mg<sub>0.12</sub>Mn<sub>0.05</sub>Ti<sub>0.22</sub>)</td>
    <td>66</td>
    <td>0.749</td>
    <td>9.324</td>
  </tr>
  <tr>
    <td>(Si<sub>2.95</sub> Fe<sup>3+1.05</sup>) (Mg<sub>3.0</sub>) F<sub>1.30</sub></td>
    <td>67</td>
    <td>0.720</td>
    <td>9.199</td>
  </tr>
  <tr>
    <td>(Si<sub>2.91</sub>Al<sub>1.09</sub>) (Al<sub>0.07</sub>Fe<sup>2+0.16</sup> Mg<sub>2.70</sub>Ti<sub>0.03</sub>) F<sub>1.13</sub></td>
    <td>70</td>
    <td>0.718</td>
    <td>9.202</td>
  </tr>
  <tr>
    <td>(Si<sub>2.86</sub>Al<sub>1.07</sub> Fe<sup>3+0.02</sup>Ti<sub>0.03</sub>) (Fe<sup>3+0.03</sup>Mg<sub>2.27</sub>Mn<sup>2+0.49</sup>)</td>
    <td>71</td>
    <td>0.739</td>
    <td>9.241</td>
  </tr>
  <tr>
    <td>(Si<sub>2.82</sub>Al<sub>1.04</sub> Fe<sup>3+0.14</sup>) (Fe<sup>3+0.08</sup>Fe<sup>2+0.13</sup>Mg<sub>2.73</sub>Ti<sub>0.06</sub>) F<sub>0.11</sub></td>
    <td>73</td>
    <td>0.718</td>
    <td>9.239</td>
  </tr>
  <tr>
    <td>(Si<sub>3.03</sub>Al<sub>0.07</sub> Fe<sup>3+0.90</sup>) (Fe<sup>3+0.01</sup>Fe<sup>2+0.60</sup>Mg<sub>2.36</sub>Mn<sub>0.01</sub>Ti<sub>0.01</sub>)</td>
    <td>74</td>
    <td>0.732</td>
    <td>9.293</td>
  </tr>
  <tr>
    <td>(Si<sub>3.02</sub>Al<sub>0.06</sub> Fe<sup>3+0.92</sup>) (Fe<sup>2+0.60</sup>Mg<sub>2.38</sub>Mn<sub>0.01</sub>Ti<sub>0.01</sub>)</td>
    <td>75</td>
    <td>0.732</td>
    <td>9.290</td>
  </tr>
  <tr>
    <td>(Si<sub>2.94</sub>Al<sub>0.78</sub> Fe<sup>3+0.28</sup>) (Fe<sup>3+0.04</sup>Fe<sup>2+0.43</sup>Mg<sub>2.39</sub>Mn<sub>0.01</sub>Ti<sub>0.08</sub>)</td>
    <td>76</td>
    <td>0.725</td>
    <td>9.267</td>
  </tr>
  <tr>
    <td>(Si<sub>2.82</sub>Al<sub>1.10</sub> Fe<sup>3+0.08</sup>) (Fe<sup>3+0.10</sup>Fe<sup>2+0.44</sup>Mg<sub>2.36</sub>Mn<sub>0.01</sub>Ti<sub>0.09</sub>)</td>
    <td>77</td>
    <td>0.723</td>
    <td>9.246</td>
  </tr>
  <tr>
    <td>(Si<sub>2.84</sub>Al<sub>1.14</sub> Fe<sup>3+0.02</sup>) (Fe<sup>3+0.06</sup>Fe<sup>2+0.60</sup>Mg<sub>2.23</sub>Mn<sub>0.01</sub>Ti<sub>0.10</sub>)</td>
    <td>78</td>
    <td>0.727</td>
    <td>9.244</td>
  </tr>
  <tr>
    <td>(Si<sub>3.00</sub>Al<sub>0.90</sub> Fe<sup>3+0.10</sup>) (Fe<sup>2+1.14</sup>Mg<sub>1.73</sub>Mn<sub>0.04</sub>Ti<sub>0.09</sub>)</td>
    <td>79</td>
    <td>0.741</td>
    <td>9.259</td>
  </tr>
  <tr>
    <td>(Si<sub>3.01</sub>Al<sub>0.92</sub> Fe<sup>3+0.07</sup>) (Fe<sup>2+0.44</sup>Mg<sub>2.51</sub>Ti<sub>0.05</sub>) F<sub>0.18</sub></td>
    <td>80</td>
    <td>0.727</td>
    <td>9.227</td>
  </tr>
  <tr>
    <td>(Si<sub>2.94</sub>Al<sub>1.06</sub>) (Fe<sup>3+0.03</sup>Fe<sup>2+0.35</sup>Mg<sub>2.07</sub>Ti<sub>0.33</sub>) F<sub>0.93</sub></td>
    <td>81</td>
    <td>0.713</td>
    <td>9.208</td>
  </tr>
  <tr>
    <td>(Si<sub>2.12</sub>Al<sub>1.88</sub>) (Al<sub>0.93</sub>Fe<sub>0.17</sub>Mg<sub>1.20</sub> Cr<sub>0.01</sub>)(K<sub>0.02</sub>Na<sub>0.83</sub>)</td>
    <td>83</td>
    <td>0.666</td>
    <td>9.050</td>
  </tr>
  <tr>
    <td>(Si<sub>2.84</sub>Al<sub>1.16</sub>) (Al<sub>0.16</sub>Fe<sup>3+0.86</sup>Fe<sup>2+0.01</sup>Mg<sub>1.67</sub>Mn<sub>0.01</sub>Ti<sub>0.34</sub>) F<sub>0.17</sub></td>
    <td>85</td>
    <td>0.677</td>
    <td>9.210</td>
  </tr>
  <tr>
    <td>(Si<sub>2.88</sub>Al<sub>1.12</sub>) (Fe<sup>2+0.10</sup>Mg<sub>2.77</sub>Ti<sub>0.11</sub>) F<sub>0.51</sub></td>
    <td>86</td>
    <td>0.718</td>
    <td>9.206</td>
  </tr>
  <tr>
    <td>(Si<sub>2.97</sub>Al<sub>1.06</sub>) (Fe<sup>2+1.07</sup>Mg<sub>1.57</sub>Mn<sub>0.06</sub>Ti<sub>0.10</sub>) F<sub>0.94</sub></td>
    <td>91</td>
    <td>0.738</td>
    <td>9.241</td>
  </tr>
  <tr>
    <td>(Si<sub>3.36</sub>Al<sub>0.64</sub>) (Al<sub>1.13</sub>Li<sub>1.3</sub>) F<sub>1.53</sub></td>
    <td>93</td>
    <td>0.656</td>
    <td>9.010</td>
  </tr>
  <tr>
    <td>(Si<sub>2.98</sub>Al<sub>0.08</sub>Fe<sup>3+0.85</sup>Ti<sub>0.03</sub>) (Fe<sup>2+0.16</sup>Mg<sub>2.89</sub>Mn<sub>0.01</sub>)</td>
    <td>94</td>
    <td>0.723</td>
    <td>9.297</td>
  </tr>
  <tr>
    <td>(Si<sub>3.00</sub> Fe<sup>3+1.00</sup>) (Mg<sub>3.00</sub>)</td>
    <td>95</td>
    <td>0.720</td>
    <td>9.292</td>
  </tr>
  <tr>
    <td>(Si<sub>2.86</sub>Al<sub>1.14</sub>) (Al<sub>0.19</sub>Fe<sup>2+0.71</sup>Fe<sup>3+0.19</sup>Mg<sub>1.68</sub>Mn<sub>0.01</sub>Ti<sub>0.34</sub>) F<sub>0.17</sub></td>
    <td>99</td>
    <td>0.706</td>
    <td>9.231</td>
  </tr>
  <tr>
    <td>(Si<sub>2.71</sub>Al<sub>1.29</sub>) (Al<sub>0.18</sub> Fe<sup>3+0.01</sup>Fe<sup>2+2.31</sup> Mg<sub>0.28</sub> Li<sub>0.04</sub>Mn<sub>0.02</sub>Ti<sub>0.10</sub>) 0.14</td>
    <td>101</td>
    <td>0.758</td>
    <td>9.311</td>
  </tr>
  <tr>
    <td>(Si<sub>4.00</sub>) (Li<sub>1.00</sub>Mn<sup>3+2.00</sup>)</td>
    <td>111</td>
    <td>0.683</td>
    <td>8.914</td>
  </tr>
  <tr>
    <td>(Si<sub>2.98</sub>Al<sub>1.02</sub>) (Al<sub>0.47</sub>Fe<sup>2+2.02</sup> Mg<sub>0.03</sub> Li<sub>0.33</sub>Mn<sub>0.07</sub>) F<sub>0.99</sub></td>
    <td>112</td>
    <td>0.739</td>
    <td>9.293</td>
  </tr>
</table>

ferroan phlogopite
ferroan phlogopite
phlogopite
ferroan tetra-ferriphlogopite
magnesian annite
magnesian annite
magnesian annite
magnesian annite
magnesian annite
magnesian annite
trilithionite
manganoan phlogopite
Rb,Cs,phlogopite
annite
phlogopite
phlogopite
manganoan phlogopite
phlogopite
octa ferroan tetra ferriphlogopite
octa ferroan tetra ferriphlogopite
ferroan phlogopite
ferroan phlogopite
ferroan phlogopite
ferroan phlogopite
ferroan phlogopite
phlogopite
preiswerkite
ferrian phlogopite
phlogopite
ferroan phlogopite
trilithionite
tetra ferri phlogopite
tetra ferri phlogopite
ferroan phlogopite
annite
norrishite
Al-fluoro annite
<table><tbody><tr><td>(Si<sub>3.48</sub>Al<sub>0.53</sub>) (Al<sub>1.10</sub> Fe<sup>3+</sup><sub>0.03</sub>Fe<sup>2+</sup><sub>0.15</sub> Mg<sub>0.16</sub> Li<sub>1.51</sub>Mn<sub>0.16</sub>) F<sub>1.67</sub></td><td>113</td><td>0.679</td><td>9.005</td></tr><tr><td>(Si<sub>3.87</sub>Al<sub>0.13</sub>) (Al<sub>1.13</sub>Fe<sup>2+</sup><sub>0.07</sub> Mg<sub>0.16</sub> Li<sub>1.41</sub>Mn<sub>0.05</sub>) F<sub>x</sub></td><td>128</td><td>0.666</td><td>9.055</td></tr><tr><td>(Si<sub>3.09</sub>Al<sub>0.91</sub>) (Al<sub>1.05</sub>Fe<sup>2+</sup><sub>0.77</sub> Fe<sup>3+</sup><sub>0.16</sub>Mg<sub>0.01</sub> Li<sub>0.67</sub>Mn<sub>0.050</sub>Ti<sub>0.01</sub>) F<sub>1.21</sub></td><td>129</td><td>0.673</td><td>9.14</td></tr><tr><td>(Si<sub>3.33</sub>Al<sub>0.67</sub>) (Al<sub>0.98</sub>Fe<sup>2+</sup><sub>0.09</sub> Fe<sup>3+</sup><sub>0.03</sub>Mg<sub>0.01</sub> Li<sub>1.27</sub>Mn<sub>0.50</sub>Ti<sub>0.005</sub>) F<sub>1.58</sub></td><td>130</td><td>0.695</td><td>9.102</td></tr></tbody></table>

2M<sub>1</sub> space group C2/c

<table><tbody><tr><td>(Si<sub>2.78</sub>Al<sub>1.22</sub>) (Fe<sup>2+</sup><sub>0.70</sub>Fe<sup>3+</sup><sub>0.52</sub> Mg<sub>1.53</sub>Mn<sub>0.02</sub>Ti<sub>0.22</sub>)</td><td>131</td><td>0.713</td><td>9.249</td></tr><tr><td>(Si<sub>2.84</sub>Al<sub>1.16</sub>) (Al<sub>0.40</sub>Fe<sup>3+</sup><sub>0.17</sub>Fe<sup>2+</sup><sub>1.36</sub>Mg<sub>0.80</sub> Mn<sub>0.01</sub>Ti<sub>0.26</sub>)</td><td>132</td><td>0.709</td><td>9.242</td></tr><tr><td>(Si<sub>2.79</sub>Al<sub>1.21</sub>) (Al<sub>0.23</sub>Fe<sup>2+</sup><sub>0.81</sub>Mg<sub>1.63</sub> Mn<sub>0.02</sub>Ti<sub>0.33</sub>) F<sub>0.31</sub></td><td>133</td><td>0.709</td><td>9.220</td></tr><tr><td>(Si<sub>2.87</sub>Al<sub>1.13</sub>) (Al<sub>0.34</sub>Fe<sup>2+</sup><sub>0.79</sub>Mg<sub>1.57</sub> Mn<sub>0.002</sub>Ti<sub>0.30</sub>) F<sub>0.26</sub></td><td>134</td><td>0.703</td><td>9.222</td></tr><tr><td>(Si<sub>2.79</sub>Al<sub>1.21</sub>) (Al<sub>0.12</sub>Fe<sup>2+</sup><sub>1.39</sub>Mg<sub>1.16</sub> Mn<sub>0.007</sub>Ti<sub>0.32</sub>) Cl<sub>0.14</sub></td><td>135</td><td>0.728</td><td>9.245</td></tr><tr><td>(Si<sub>2.71</sub>Al<sub>1.29</sub>) (Al<sub>0.60</sub>Fe<sup>2+</sup><sub>1.36</sub>Mg<sub>0.71</sub> Mn<sub>0.04</sub>Ti<sub>0.16</sub>)</td><td>136</td><td>0.705</td><td>9.242</td></tr><tr><td>(Si<sub>2.84</sub>Al<sub>1.16</sub>) (Al<sub>0.16</sub>Fe<sup>3+</sup><sub>0.01</sub>Fe<sup>2+</sup><sub>1.36</sub>Mg<sub>1.67</sub> Mn<sub>0.01</sub>Ti<sub>0.34</sub>)</td><td>137</td><td>0.685</td><td>9.212</td></tr><tr><td>(Si<sub>3.62</sub>Al<sub>0.38</sub>) (Al<sub>1.26</sub>Fe<sup>2+</sup><sub>0.002</sub>Mg<sub>0.002</sub> Li<sub>1.65</sub>Mn<sub>0.04</sub>Ti<sub>0.001</sub>) F<sub>1.52</sub></td><td>138</td><td>0.666</td><td>9.026</td></tr><tr><td>(Si<sub>2.86</sub>Al<sub>1.14</sub>) (Al<sub>0.19</sub> Fe<sup>3+</sup><sub>0.19</sub>Fe<sup>2+</sup><sub>0.71</sub>Mg<sub>1.68</sub> Mn<sub>0.01</sub>Ti<sub>0.34</sub>) F<sub>0.17</sub></td><td>139</td><td>0.706</td><td>9.234</td></tr></tbody></table>

2M<sub>1</sub> space group Cc

<table><tbody><tr><td>(Si<sub>3.00</sub>Al<sub>1.00</sub>) (Al<sub>0.97</sub>Fe<sup>3+</sup><sub>0.14</sub>Mg<sub>0.02</sub> Li<sub>0.50</sub>Mn<sub>0.03</sub>) F<sub>0.91</sub></td><td>140</td><td>0.682</td><td>9.187</td></tr></tbody></table>

2M<sub>1</sub> space group C1

<table><tbody><tr><td>(Si<sub>2.01</sub>Al<sub>1.99</sub>) (Al<sub>2.01</sub>Fe<sup>3+</sup><sub>0.01</sub>Li<sub>0.85</sub>Mg<sub>0.03</sub>Mn<sub>0.005</sub>Cr<sub>0.01</sub>) (K<sub>0.001</sub>Na<sub>0.94</sub>Ca<sub>0.03</sub>)</td><td>141</td><td>0.604</td><td>8.872</td></tr></tbody></table>

2M<sub>2</sub> space group C2/c

<table><tbody><tr><td>(Si<sub>3.49</sub>Al<sub>0.51</sub>) (Al<sub>1.30</sub>Fe<sup>3+</sup><sub>0.008</sub>Fe<sup>2+</sup><sub>0.002</sub>Mg<sub>0.05</sub> Li<sub>1.48</sub>Mn<sub>0.03</sub>) F<sub>x</sub></td><td>142</td><td>0.656</td><td>9.023</td></tr><tr><td>(Si<sub>3.36</sub>Al<sub>0.64</sub>) (Al<sub>1.26</sub>Fe<sup>3+</sup><sub>0.003</sub>Mg<sub>0.007</sub> Li<sub>1.76</sub>Mn<sub>0.03</sub>) F<sub>1.53</sub></td><td>143</td><td>0.666</td><td>9.040</td></tr><tr><td>(Si<sub>3.39</sub>Al<sub>0.61</sub>) (Al<sub>1.40</sub>Fe<sup>2+</sup><sub>0.07</sub>Mg<sub>0.03</sub> Li<sub>1.03</sub>Mn<sub>0.03</sub>) F<sub>1.20</sub></td><td>144</td><td>0.637</td><td>9.032</td></tr></tbody></table>

3T space group P3<sub>1</sub>2

<table><tbody><tr><td>(Si<sub>3.48</sub>Al<sub>0.52</sub>) (Al<sub>1.25</sub>Fe<sub>0.015</sub>Mg<sub>0.01</sub> Li<sub>1.62</sub>Mn<sub>0.09</sub>) F<sub>1.54</sub></td><td>145</td><td>0.668</td><td>9.007</td></tr><tr><td>(Si<sub>2.97</sub>Al<sub>1.03</sub>) (Al<sub>0.68</sub> Al<sub>0.19</sub> Fe<sup>3+</sup><sub>0.34</sub>Fe<sup>2+</sup><sub>1.25</sub>Zn<sub>0.02</sub>Li<sub>0.37</sub>Mn<sub>0.04</sub>) F<sub>1.06</sub></td><td>146</td><td>0.699</td><td>9.195</td></tr></tbody></table>

Triohedral brittle micas (collected data)

1M space group C2/m

<table><tbody><tr><td>(Si<sub>1.20</sub>Al<sub>2.76</sub>) (Al<sub>0.68</sub>Fe<sup>3+</sup><sub>0.04</sub>Fe<sup>2+</sup><sub>0.11</sub>Mg<sub>2.21</sub>) Ca, F<sub>0.14</sub></td><td>1</td><td>0.680</td><td>9.005</td></tr><tr><td>(Si<sub>1.19</sub>Al<sub>2.79</sub>) (Al<sub>0.64</sub>Fe<sup>2+</sup><sub>0.22</sub>Mg<sub>2.14</sub>) Ca, F<sub>0.11</sub></td><td>2</td><td>0.685</td><td>9.006</td></tr><tr><td>(Si<sub>1.25</sub>Al<sub>2.75</sub>) (Al<sub>0.76</sub>Fe<sup>2+</sup><sub>0.13</sub>Mg<sub>2.09</sub>) Ca</td><td>3</td><td>0.676</td><td>8.995</td></tr><tr><td>(Si<sub>1.24</sub>Al<sub>2.76</sub>) (Al<sub>0.65</sub>Fe<sup>2+</sup><sub>0.13</sub>Mg<sub>2.22</sub>) Ca, F<sub>0.17</sub></td><td>4</td><td>0.683</td><td>9.026</td></tr><tr><td>(Si<sub>1.19</sub>Al<sub>2.78</sub>Fe<sup>3+</sup><sub>0.03</sub>) (Al<sub>0.67</sub>Fe<sup>2+</sup><sub>0.16</sub>Mg<sub>2.17</sub>Ti<sub>0.01</sub>) Ca, F<sub>0.19</sub></td><td>5</td><td>0.682</td><td>9.003</td></tr><tr><td>(Si<sub>1.28</sub>Al<sub>2.70</sub>Fe<sup>3+</sup><sub>0.02</sub>) (Al<sub>0.63</sub>Fe<sup>2+</sup><sub>0.16</sub>Mg<sub>2.20</sub>Ti<sub>0.01</sub>) Ca, F<sub>0.18</sub></td><td>6</td><td>0.684</td><td>9.005</td></tr><tr><td>(Si<sub>2.17</sub>Al<sub>1.83</sub>) (Al<sub>0.17</sub>Fe<sup>2+</sup><sub>0.27</sub>Mg<sub>2.53</sub>Ti<sub>0.03</sub>) (K<sub>0.41</sub>Ba<sub>0.54</sub>) F<sub>0.71</sub></td><td>7</td><td>0.714</td><td>9.214</td></tr><tr><td>(Si<sub>2.03</sub>Al<sub>1.97</sub>) (Al<sub>0.04</sub>Fe<sup>2+</sup><sub>0.27</sub>Mg<sub>2.64</sub>Mn<sub>0.31</sub>) Ba, F<sub>0.37</sub></td><td>8</td><td>0.729</td><td>9.230</td></tr></tbody></table>

polylithionite

polylithionite

polylithionite-siderophyllite

masutomilite

ferroan phlogopite

magnesian annite

ferroan phlogopite

ferroan phlogopite

magnesian annite

magnesian annite

ferrian phlogopite

polylithionite

hydrogenated ferroan phlogopite

lithian siderophyllite

ephesite

trilithionite

polylithionite

trilithionite

polylithionite

lithian siderophyllite

clintonite

clintonite

clintonite

clintonite

clintonite

clintonite

potassium kinoshitaite

kinoshitaite
<table><tbody><tr><td>(Si<sub>2.44</sub>Al<sub>1.56</sub>) (Fe<sup>3+</sup><sub>0.15</sub>Fe<sup>2+</sup><sub>1.72</sub>Mg<sub>0.74</sub>Ti<sub>0.17</sub>) (K<sub>0.33</sub>Ba<sub>0.47</sub>) F<sub>0.65</sub></td><td>9</td><td>0.746</td><td>9.337</td><td>ferrokinoshitaite</td></tr><tr><td>(Si<sub>1.20</sub>Al<sub>2.69</sub>Fe<sup>3+</sup><sub>0.11</sub>) (Al<sub>0.70</sub>Fe<sup>2+</sup><sub>0.05</sub>Mg<sub>2.29</sub>Ti<sub>0.006</sub>) Ca</td><td>10</td><td>0.678</td><td>9.013</td><td>clintonite</td></tr><tr><td>(Si<sub>2.05</sub>Al<sub>1.95</sub>) (Al<sub>0.22</sub>Fe<sup>3+</sup><sub>0.05</sub>Mg<sub>2.07</sub>Mn<sup>2+</sup><sub>0.52</sub>Mn<sup>3+</sup><sub>0.21</sub>) (K<sub>0.35</sub>Na<sub>0.11</sub> Ba<sub>0.58</sub>)</td><td>11</td><td>0.724</td><td>9.250</td><td>magnesian kinoshitaite</td></tr><tr><td>(Si<sub>1.10</sub>Al<sub>2.90</sub>) (Al<sub>0.74</sub>Fe<sup>2+</sup><sub>0.18</sub>Mg<sub>2.08</sub>) Ca</td><td>12</td><td>0.678</td><td>9.005</td><td>clintonite</td></tr><tr><td>(Si<sub>1.32</sub>Al<sub>2.68</sub>) (Al<sub>0.70</sub>Fe<sup>2+</sup><sub>0.11</sub>Mg<sub>2.18</sub>) Ca</td><td>13</td><td>0.679</td><td>9.005</td><td>clintonite</td></tr><tr><td>(Si<sub>1.08</sub>Al<sub>2.92</sub>) (Al<sub>0.82</sub>Fe<sup>2+</sup><sub>0.07</sub>Mg<sub>2.11</sub>) Ca</td><td>14</td><td>0.671</td><td>9.002</td><td>clintonite</td></tr><tr><td colspan="3">2M<sub>1</sub> space group Cc</td><td></td><td></td></tr><tr><td>(Si<sub>2.02</sub>Al<sub>1.34</sub>Be<sub>0.64</sub>) (Al<sub>2.04</sub>Fe<sup>3+</sup><sub>0.007</sub>Li<sub>0.55</sub>) Ca</td><td>16</td><td>0.583</td><td>8.763</td><td>bityite</td></tr><tr><td colspan="3">2Or space group Pnmn</td><td></td><td></td></tr><tr><td>(Si<sub>2.64</sub>Al<sub>0.08</sub> Fe<sup>3+</sup><sub>0.70</sub>Fe<sup>2+</sup><sub>0.58</sub>) (Mg<sub>0.48</sub>Fe<sup>2+</sup><sub>2.46</sub>Mn<sub>0.06</sub>Ti<sub>0.01</sub>) Ba<sub>0.87</sub> S<sub>0.85</sub> Cl<sub>0.15</sub></td><td>17</td><td>0.771</td><td>9.492</td><td>anandite</td></tr><tr><td>(Si<sub>2.60</sub>Fe<sup>3+</sup><sub>1.40</sub>) (Al<sub>0.10</sub>Mg<sub>0.46</sub>Fe<sup>2+</sup><sub>2.46</sub>Mn<sup>2+</sup><sub>0.04</sub>Mn<sup>3+</sup><sub>0.04</sub>) Ba<sub>0.96</sub> S<sub>0.84</sub> Cl<sub>0.16</sub></td><td>18</td><td>0.749</td><td>9.509</td><td>anandite</td></tr></tbody></table>

## Li- and Fe rich 1M micas

<table><tbody><tr><td>(Si<sub>3.536</sub>Al<sub>0.464</sub>) (Al<sub>1.055</sub>Ti<sub>0.001</sub>Fe<sup>3+</sup><sub>0.047</sub>Fe<sup>2+</sup><sub>0.403</sub>Mg<sub>0.002</sub>Mn<sub>0.038</sub>Zn<sub>0.002</sub>Li<sub>1.411</sub>)</td><td>114</td><td>0.681</td><td>9.085</td><td>(OH<sub>0.143</sub>F<sub>1.746</sub>)</td></tr><tr><td>(Si<sub>3.413</sub>Al<sub>0.587</sub>) (Al<sub>1.115</sub>Ti<sub>0.008</sub>Fe<sup>3+</sup><sub>0.052</sub>Fe<sup>2+</sup><sub>0.533</sub>Mg<sub>0.010</sub>Mn<sub>0.039</sub>Zn<sub>0.003</sub>Li<sub>1.111</sub>)</td><td>55a</td><td>0.675</td><td>9.092</td><td>(OH<sub>0.206</sub>F<sub>1.627</sub>)</td></tr><tr><td>(Si<sub>3.412</sub>Al<sub>0.588</sub>) (Al<sub>1.064</sub>Ti<sub>0.006</sub>Fe<sup>3+</sup><sub>0.059</sub>Fe<sup>2+</sup><sub>0.546</sub>Mg<sub>0.006</sub>Mn<sub>0.046</sub>Zn<sub>0.008</sub>Li<sub>1.223</sub>)</td><td>55b</td><td>0.681</td><td>9.085</td><td>(OH<sub>0.241</sub>F<sub>1.529</sub>)</td></tr><tr><td>(Si<sub>3.295</sub>Al<sub>0.705</sub>) (Al<sub>1.007</sub>Ti<sub>0.002</sub>Fe<sup>3+</sup><sub>0.092</sub>Fe<sup>2+</sup><sub>0.705</sub>Mg<sub>0.022</sub>Mn<sub>0.062</sub>Zn<sub>0.005</sub>Li<sub>1.082</sub>)</td><td>130-1</td><td>0.686</td><td>9.128</td><td>(OH<sub>0.187</sub>F<sub>1.553</sub>)</td></tr><tr><td>(Si<sub>3.328</sub>Al<sub>0.672</sub>) (Al<sub>1.020</sub>Ti<sub>0.005</sub>Fe<sup>3+</sup><sub>0.059</sub>Fe<sup>2+</sup><sub>0.712</sub>Mg<sub>0.022</sub>Mn<sub>0.063</sub>Zn<sub>0.005</sub>Li<sub>1.095</sub>)</td><td>130-2</td><td>0.686</td><td>9.105</td><td>(OH<sub>0.186</sub>F<sub>1.545</sub>)</td></tr><tr><td>(Si<sub>3.210</sub>Al<sub>0.790</sub>) (Al<sub>1.050</sub>Ti<sub>0.005</sub>Fe<sup>3+</sup><sub>0.072</sub>Fe<sup>2+</sup><sub>0.675</sub>Mg<sub>0.012</sub>Mn<sub>0.074</sub>Zn<sub>0.006</sub>Li<sub>0.974</sub>)</td><td>137</td><td>0.681</td><td>9.114</td><td>(OH<sub>0.244</sub>F<sub>1.739</sub>)</td></tr><tr><td>(Si<sub>3.303</sub>Al<sub>0.697</sub>) (Al<sub>1.032</sub>Ti<sub>0.011</sub>Fe<sup>3+</sup><sub>0.141</sub>Fe<sup>2+</sup><sub>0.639</sub>Mg<sub>0.013</sub>Mn<sub>0.011</sub>Zn<sub>0.006</sub>Li<sub>0.969</sub>)</td><td>104</td><td>0.676</td><td>9.122</td><td>(OH<sub>0.244</sub>F<sub>1.606</sub>)</td></tr><tr><td>(Si<sub>3.308</sub>Al<sub>0.692</sub>) (Al<sub>1.035</sub>Ti<sub>0.006</sub>Fe<sup>3+</sup><sub>0.118</sub>Fe<sup>2+</sup><sub>0.610</sub>Mg<sub>0.063</sub>Mn<sub>0.002</sub>Zn<sub>0.006</sub>Li<sub>0.941</sub>)</td><td>54b</td><td>0.677</td><td>9.123</td><td>(OH<sub>0.244</sub>F<sub>1.654</sub>)</td></tr><tr><td>(Si<sub>3.229</sub>Al<sub>0.771</sub>) (Al<sub>0.882</sub>Ti<sub>0.005</sub>Fe<sup>3+</sup><sub>0.242</sub>Fe<sup>2+</sup><sub>0.648</sub>Mg<sub>0.009</sub>Mn<sub>0.065</sub>Zn<sub>0.012</sub>Li<sub>0.862</sub>)</td><td>177</td><td>0.683</td><td>9.133</td><td>(OH<sub>0.149</sub>F<sub>1.921</sub>)</td></tr><tr><td>(Si<sub>3.175</sub>Al<sub>0.825</sub>) (Al<sub>1.019</sub>Ti<sub>0.026</sub>Fe<sup>3+</sup><sub>0.039</sub>Fe<sup>2+</sup><sub>0.808</sub>Mg<sub>0.052</sub>Mn<sub>0.059</sub>Zn<sub>0.011</sub>Li<sub>0.855</sub>)</td><td>140-1</td><td>0.683</td><td>9.118</td><td>(OH<sub>0.248</sub>F<sub>1.622</sub>)</td></tr><tr><td>(Si<sub>3.235</sub>Al<sub>0.765</sub>) (Al<sub>0.981</sub>Ti<sub>0.025</sub>Fe<sup>3+</sup><sub>0.053</sub>Fe<sup>2+</sup><sub>0.805</sub>Mg<sub>0.053</sub>Mn<sub>0.060</sub>Zn<sub>0.011</sub>Li<sub>0.852</sub>)</td><td>140-2</td><td>0.685</td><td>9.146</td><td>(OH<sub>0.248</sub>F<sub>1.640</sub>)</td></tr><tr><td>(Si<sub>3.312</sub>Al<sub>0.688</sub>) (Al<sub>1.109</sub>Ti<sub>0.006</sub>Fe<sup>3+</sup><sub>0.046</sub>Fe<sup>2+</sup><sub>0.779</sub>Mg<sub>0.004</sub>Mn<sub>0.080</sub>Zn<sub>0.002</sub>Li<sub>0.765</sub>)</td><td>24</td><td>0.676</td><td>9.139</td><td>(OH<sub>0.174</sub>F<sub>1.591</sub>)</td></tr><tr><td>(Si<sub>3.057</sub>Al<sub>0.943</sub>) (Al<sub>0.811</sub>Ti<sub>0.102</sub>Fe<sup>3+</sup><sub>0.094</sub>Fe<sup>2+</sup><sub>1.396</sub>Mg<sub>0.036</sub>Mn<sub>0.079</sub>Zn<sub>0.017</sub>Li<sub>0.409</sub>)</td><td>47</td><td>0.700</td><td>9.233</td><td>(OH<sub>0.284</sub>F<sub>1.080</sub>)</td></tr><tr><td>(Si<sub>3.225</sub>Al<sub>0.775</sub>) (Al<sub>0.905</sub>Ti<sub>0.032</sub>Fe<sup>3+</sup><sub>0.094</sub>Fe<sup>2+</sup><sub>1.192</sub>Mg<sub>0.023</sub>Mn<sub>0.053</sub>Zn<sub>0.013</sub>Li<sub>0.624</sub>)</td><td>103</td><td>0.694</td><td>9.144</td><td>(OH<sub>0.154</sub>F<sub>1.294</sub>)</td></tr><tr><td colspan="3">Li-poor micas</td><td></td><td></td></tr><tr><td>(Si<sub>2.943</sub>Al<sub>1.057</sub>) (Al<sub>0.835</sub>Ti<sub>0.024</sub>Fe<sup>3+</sup><sub>0.242</sub>Fe<sup>2+</sup><sub>1.627</sub>Mg<sub>0.097</sub>Mn<sub>0.004</sub>Zn<sub>0.007</sub>Li<sub>0.169</sub>)</td><td>26</td><td>0.675</td><td>9.092</td><td>(OH<sub>0.167</sub>F<sub>0.903</sub>)</td></tr><tr><td>(Si<sub>3.094</sub>Al<sub>0.906</sub>) (Al<sub>0.349</sub>Ti<sub>0.108</sub>Fe<sup>3+</sup><sub>0.159</sub>Fe<sup>2+</sup><sub>2.222</sub>Mg<sub>0.002</sub>Mn<sub>0.079</sub>Li<sub>0.082</sub>)</td><td>33</td><td>0.681</td><td>9.085</td><td>(OH<sub>0.119</sub>F<sub>1.087</sub>)</td></tr></tbody></table>

## Li-, Fe-, and Mn- rich 1M micas

<table><tbody><tr><td>(Si<sub>3.43</sub>Al<sub>0.57</sub>) (Al<sub>1.0</sub>Fe<sup>2+</sup><sub>0.38</sub>Mg<sub>0.01</sub>Mn<sub>0.17</sub>Li<sub>1.44</sub>)</td><td>Hirukawa Mine</td><td>0.691</td><td>9.086</td><td>(OH<sub>0.12</sub>F<sub>1.88</sub>)</td></tr><tr><td>(Si<sub>3.30</sub>Al<sub>0.70</sub>) (Al<sub>1.0</sub>Fe<sup>2+</sup><sub>0.36</sub>Mg<sub>0.01</sub>Mn<sub>0.31</sub>Li<sub>1.32</sub>)</td><td>Mokrusha Mine</td><td>0.695</td><td>9.133</td><td>(OH<sub>0.09</sub>F<sub>1.91</sub>)</td></tr><tr><td>(Si<sub>3.11</sub>Al<sub>0.89</sub>) (Al<sub>0.91</sub> Ti<sub>0.02</sub>Fe<sup>2+</sup><sub>0.46</sub>Mg<sub>0.03</sub>Mn<sub>0.52</sub>Li<sub>1.06</sub>)</td><td>Boise County</td><td>0.706</td><td>9.146</td><td>(OH<sub>0.11</sub>F<sub>1.89</sub>)</td></tr></tbody></table>

## Fe-Li micas#

## Brigatti et al. (2007)

## Rieder et al. (1970)
<table>
  <tbody>
    <tr>
      <td>(Si<sub>2.975</sub>Al<sub>1.025</sub>)(Fe<sup>2+</sup><sub>1.32</sub>Mg<sub>0.05</sub>Mn<sub>0.02</sub>Fe<sup>3+</sup><sub>0.045</sub>Al<sub>1.00</sub>Ti<sub>0.02</sub>)</td>
      <td>44</td>
      <td>0.675</td>
      <td>9.253</td>
      <td>(OH<sub>1.43</sub> F<sub>0.49</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>2.57</sub>Al<sub>1.43</sub>)(Fe<sup>2+</sup><sub>1.835</sub>Mg<sub>0.60</sub>Li<sub>0.025</sub>Mn<sub>0.01</sub>Fe<sup>3+</sup><sub>0.305</sub>Ti<sub>0.15</sub>)</td>
      <td>12</td>
      <td>0.741</td>
      <td>9.336</td>
      <td>(OH<sub>1.63</sub> F<sub>0.24</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>2.76</sub>Al<sub>1.24</sub>)(Fe<sup>2+</sup><sub>1.61</sub>Mg<sub>0.21</sub>Li<sub>0.12</sub>Mn<sub>0.04</sub>Fe<sup>3+</sup><sub>0.18</sub>Al<sub>0.575</sub>Ti<sub>0.02</sub>)</td>
      <td>8</td>
      <td>0.714</td>
      <td>9.255</td>
      <td>(OH<sub>1.62</sub> F<sub>0.38</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>2.785</sub>Al<sub>1.215</sub>)(Fe<sup>2+</sup><sub>1.485</sub>Mg<sub>0.12</sub>Li<sub>0.21</sub>Mn<sub>0.035</sub>Fe<sup>3+</sup><sub>0.23</sub>Al<sub>0.64</sub>Ti<sub>0.01</sub>)</td>
      <td>7</td>
      <td>0.707</td>
      <td>9.260</td>
      <td>(OH<sub>1.0</sub> F<sub>1.01</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>2.74</sub>Al<sub>1.26</sub>)(Fe<sup>2+</sup><sub>1.47</sub>Mg<sub>0.06</sub>Li<sub>0.305</sub>Mn<sub>0.055</sub>Fe<sup>3+</sup><sub>0.32</sub>Al<sub>0.52</sub>Cr<sub>0.025</sub>Ti<sub>0.04</sub>)</td>
      <td>18</td>
      <td>0.711</td>
      <td>9.267</td>
      <td>(OH<sub>1.01</sub> F<sub>0.99</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>2.91</sub>Al<sub>1.09</sub>)(Fe<sup>2+</sup><sub>1.345</sub>Mg<sub>0.025</sub>Li<sub>0.345</sub>Mn<sub>0.045</sub>Fe<sup>3+</sup><sub>0.135</sub>Al<sub>0.815</sub>Ti<sub>0.01</sub>)</td>
      <td>13</td>
      <td>0.697</td>
      <td>9.229</td>
      <td>(OH<sub>0.98</sub> F<sub>1.02</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>2.875</sub>Al<sub>1.125</sub>)(Fe<sup>2+</sup><sub>1.185</sub>Li<sub>0.30</sub>Mn<sub>0.02</sub>Fe<sup>3+</sup><sub>0.15</sub>Al<sub>0.955</sub>Ti<sub>0.02</sub>)</td>
      <td>31</td>
      <td>0.680</td>
      <td>9.214</td>
      <td>(OH<sub>1.42</sub> F<sub>0.58</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>2.87</sub>Al<sub>1.13</sub>)(Fe<sup>2+</sup><sub>1.035</sub>Mg<sub>0.025</sub>Li<sub>0.60</sub>Mn<sub>0.02</sub>Fe<sup>3+</sup><sub>0.155</sub>Al<sub>0.94</sub>Ti<sub>0.02</sub>)</td>
      <td>29</td>
      <td>0.684</td>
      <td>9.203</td>
      <td>(OH<sub>0.77</sub> F<sub>1.23</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>3.04</sub>Al<sub>0.96</sub>)(Fe<sup>2+</sup><sub>0.955</sub>Mg<sub>0.01</sub>Li<sub>0.585</sub>Mn<sub>0.035</sub>Fe<sup>3+</sup><sub>0.14</sub>Al<sub>0.965</sub>Ti<sub>0.01</sub>)</td>
      <td>9</td>
      <td>0.681</td>
      <td>9.186</td>
      <td>(OH<sub>1.17</sub> F<sub>0.82</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>3.015</sub>Al<sub>0.985</sub>)(Fe<sup>2+</sup><sub>1.06</sub>Mg<sub>0.01</sub>Li<sub>0.725</sub>Mn<sub>0.05</sub>Fe<sup>3+</sup><sub>0.08</sub>Al<sub>0.77</sub>Cr<sub>0.135</sub>Ti<sub>0.02</sub>)</td>
      <td>35</td>
      <td>0.696</td>
      <td>9.172</td>
      <td>(OH<sub>0.44</sub> F<sub>1.56</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>3.135</sub>Al<sub>0.865</sub>)(Fe<sup>2+</sup><sub>0.65</sub>Mg<sub>0.02</sub>Li<sub>0.505</sub>Mn<sub>0.035</sub>Fe<sup>3+</sup><sub>0.155</sub>Al<sub>1.155</sub>Ti<sub>0.01</sub>)</td>
      <td>38</td>
      <td>0.656</td>
      <td>9.129</td>
      <td>(OH<sub>1.10</sub> F<sub>0.91</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>3.14</sub>Al<sub>0.86</sub>)(Fe<sup>2+</sup><sub>0.725</sub>Li<sub>0.645</sub>Mn<sub>0.045</sub>Fe<sup>3+</sup><sub>0.155</sub>Al<sub>1.035</sub>Ti<sub>0.02</sub>)</td>
      <td>40</td>
      <td>0.670</td>
      <td>9.146</td>
      <td>(OH<sub>0.79</sub> F<sub>1.21</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>3.16</sub>Al<sub>0.84</sub>)(Fe<sup>2+</sup><sub>0.8</sub>Mg<sub>0.08</sub>Li<sub>0.715</sub>Fe<sup>3+</sup><sub>0.105</sub>Al<sub>0.99</sub>Ti<sub>0.02</sub>)</td>
      <td>5</td>
      <td>0.677</td>
      <td>9.155</td>
      <td>(OH<sub>0.86</sub> F<sub>1.14</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>3.07</sub>Al<sub>0.93</sub>)(Fe<sup>2+</sup><sub>0.715</sub>Li<sub>0.71</sub>Mn<sub>0.03</sub>Fe<sup>3+</sup><sub>0.16</sub>Al<sub>1.05</sub>Ti<sub>0.01</sub>)</td>
      <td>37</td>
      <td>0.670</td>
      <td>9.160</td>
      <td></td>
    </tr>
    <tr>
      <td>(Si<sub>3.105</sub>Al<sub>0.895</sub>)(Fe<sup>2+</sup><sub>0.66</sub>Mg<sub>0.025</sub>Li<sub>0.735</sub>Mn<sub>0.025</sub>Fe<sup>3+</sup><sub>0.235</sub>Al<sub>0.985</sub>)</td>
      <td>15</td>
      <td>0.672</td>
      <td>9.150</td>
      <td>(OH<sub>0.88</sub> F<sub>1.13</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>2.815</sub>Al<sub>1.185</sub>)(Fe<sup>2+</sup><sub>1.195</sub>Mg<sub>0.26</sub>Li<sub>0.375</sub>Mn<sub>0.035</sub>Fe<sup>3+</sup><sub>0.16</sub>Al<sub>0.78</sub>Ti<sub>0.08</sub>)</td>
      <td>2</td>
      <td>0.692</td>
      <td>9.209</td>
      <td>(OH<sub>1.27</sub> F<sub>0.38</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>2.825</sub>Al<sub>1.175</sub>)(Fe<sup>2+</sup><sub>1.085</sub>Mg<sub>0.16</sub>Li<sub>0.39</sub>Mn<sub>0.035</sub>Fe<sup>3+</sup><sub>0.305</sub>Al<sub>0.701</sub>Ti<sub>0.14</sub>)</td>
      <td>23</td>
      <td>0.694</td>
      <td>9.201</td>
      <td>(OH<sub>0.99</sub> F<sub>1.02</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>2.895</sub>Al<sub>1.105</sub>)(Fe<sup>2+</sup><sub>1.14</sub>Mg<sub>0.23</sub>Li<sub>0.43</sub>Mn<sub>0.04</sub>Fe<sup>3+</sup><sub>0.13</sub>Al<sub>0.80</sub>Ti<sub>0.05</sub>)</td>
      <td>3</td>
      <td>0.695</td>
      <td>9.209</td>
      <td>(OH<sub>0.87</sub> F<sub>1.13</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>2.98</sub>Al<sub>1.02</sub>)(Fe<sup>2+</sup><sub>1.065</sub>Mg<sub>0.015</sub>Li<sub>0.495</sub>Mn<sub>0.035</sub>Fe<sup>3+</sup><sub>0.14</sub>Al<sub>0.94</sub>Ti<sub>0.01</sub>)</td>
      <td>4</td>
      <td>0.683</td>
      <td>9.211</td>
      <td>(OH<sub>1.10</sub> F<sub>0.91</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>3.02</sub>Al<sub>0.98</sub>)(Fe<sup>2+</sup><sub>1.00</sub>Mg<sub>0.235</sub>Li<sub>0.475</sub>Mn<sub>0.03</sub>Fe<sup>3+</sup><sub>0.09</sub>Al<sub>0.83</sub>Ti<sub>0.05</sub>)</td>
      <td>6</td>
      <td>0.688</td>
      <td>9.200</td>
      <td>(OH<sub>1.14</sub> F<sub>0.86</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>3.055</sub>Al<sub>0.945</sub>)(Fe<sup>2+</sup><sub>0.765</sub>Mg<sub>0.01</sub>Li<sub>0.42</sub>Mn<sub>0.02</sub>Fe<sup>3+</sup><sub>0.305</sub>Al<sub>0.99</sub>)</td>
      <td>33</td>
      <td>0.664</td>
      <td>9.194</td>
      <td></td>
    </tr>
    <tr>
      <td>(Si<sub>2.94</sub>Al<sub>1.06</sub>)(Fe<sup>2+</sup><sub>1.085</sub>Mg<sub>0.125</sub>Li<sub>0.60</sub>Mn<sub>0.025</sub>Fe<sup>3+</sup><sub>0.105</sub>Al<sub>0.875</sub>Ti<sub>0.01</sub>)</td>
      <td>10</td>
      <td>0.692</td>
      <td>9.148</td>
      <td>(OH<sub>0.83</sub> F<sub>1.17</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>3.20</sub>Al<sub>0.80</sub>)(Fe<sup>2+</sup><sub>0.815</sub>Mg<sub>0.025</sub>Li<sub>0.455</sub>Mn<sub>0.02</sub>Fe<sup>3+</sup><sub>0.085</sub>Al<sub>1.125</sub>Ti<sub>0.01</sub>)</td>
      <td>14</td>
      <td>0.662</td>
      <td>9.170</td>
      <td>(OH<sub>0.17</sub> F<sub>0.72</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>3.135</sub>Al<sub>0.865</sub>) (Fe<sup>2+</sup><sub>0.685</sub>Mg<sub>0.015</sub>Li<sub>0.915</sub>Mn<sub>0.035</sub>Fe<sup>3+</sup><sub>0.11</sub>Al<sub>1.00</sub>Ti<sub>0.02</sub>)</td>
      <td>16</td>
      <td>0.678</td>
      <td>9.099</td>
      <td>(OH<sub>0.63</sub> F<sub>1.38</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>3.315</sub>Al<sub>0.685</sub>) (Fe<sup>2+</sup><sub>0.62</sub>Li<sub>1.10</sub>Mn<sub>0.07</sub>Fe<sup>3+</sup><sub>0.06</sub>Al<sub>0.98</sub>Ti<sub>0.01</sub>)</td>
      <td>1</td>
      <td>0.685</td>
      <td>9.110</td>
      <td>(OH<sub>0.80</sub> F<sub>1.21</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>3.27</sub>Al<sub>0.73</sub>)(Fe<sup>2+</sup><sub>0.555</sub>Mg<sub>0.03</sub>Li<sub>1.06</sub>Mn<sub>0.03</sub>Fe<sup>3+</sup><sub>0.08</sub>Al<sub>1.02</sub>Ti<sub>0.03</sub>)</td>
      <td>22</td>
      <td>0.677</td>
      <td>9.105</td>
      <td>(OH<sub>0.30</sub> F<sub>1.70</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>3.5</sub>Al<sub>0.5</sub>)(Fe<sup>2+</sup><sub>0.26</sub>Li<sub>1.27</sub>Mn<sub>0.04</sub>Fe<sup>3+</sup><sub>0.135</sub>Al<sub>1.05</sub>Ti<sub>0.01</sub>)</td>
      <td>17</td>
      <td>0.671</td>
      <td>9.058</td>
      <td>(OH<sub>0.34</sub> F<sub>1.66</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>3.58</sub>Al<sub>0.42</sub>)(Fe<sup>2+</sup><sub>0.005</sub>Mg<sub>0.065</sub>Li<sub>1.61</sub>Mn<sub>0.05</sub>Fe<sup>3+</sup><sub>0.02</sub>Al<sub>1.17</sub>)</td>
      <td>41</td>
      <td>0.669</td>
      <td>9.028</td>
      <td>(OH<sub>0.49</sub> F<sub>1.52</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>3.48</sub>Al<sub>0.52</sub>)(Mg<sub>0.055</sub>Li<sub>1.475</sub>Mn<sub>0.03</sub>Fe<sup>3+</sup><sub>0.01</sub>Al<sub>1.28</sub>)</td>
      <td>43</td>
      <td>0.659</td>
      <td>9.026</td>
      <td>(OH<sub>0.42</sub> F<sub>1.58</sub>)</td>
    </tr>
    <tr>
      <td>(Si<sub>3.52</sub>Al<sub>0.48</sub>) (Mg<sub>0.06</sub>Li<sub>1.575</sub>Mn<sub>0.01</sub>Fe<sup>3+</sup><sub>0.005</sub>Al<sub>1.24</sub>)</td>
      <td>42</td>
      <td>0.663</td>
      <td>9.020</td>
      <td>(OH<sub>0.47</sub> F<sub>1.54</sub>)</td>
    </tr>
    <tr>
      <td>Si<sub>4</sub> (Mg<sub>0.035</sub>Li<sub>1.96</sub>Fe<sup>3+</sup><sub>0.005</sub>Al<sub>0.955</sub>Ti<sub>0.05</sub>)</td>
      <td>45</td>
      <td>0.685</td>
      <td>8.970</td>
      <td>(OH<sub>0.36</sub> F<sub>1.64</sub>)</td>
    </tr>
  </tbody>
</table>

Various micas

<table>
  <tbody>
    <tr>
      <td>(Si<sub>2.80</sub>Al<sub>1.20</sub>)(Fe<sup>2+</sup><sub>1.30</sub>Mg<sub>1.03</sub>Mn<sub>0.03</sub>Fe<sup>3+</sup><sub>0.15</sub>Ti<sub>0.10</sub>Al<sub>0.33</sub>)</td>
      <td>1</td>
      <td>0.719</td>
      <td>9.265</td>
      <td>biotite</td>
    </tr>
    <tr>
      <td>(Si<sub>2.82</sub>Al<sub>1.18</sub>)(Fe<sup>2+</sup><sub>1.33</sub>Mg<sub>0.84</sub>Li<sub>0.10</sub>Mn<sub>0.03</sub>Fe<sup>3+</sup><sub>0.20</sub>Ti<sub>0.10</sub>Al<sub>0.27</sub>)</td>
      <td>3</td>
      <td>0.724</td>
      <td>9.268</td>
      <td>biotite</td>
    </tr>
    <tr>
      <td>(Si<sub>2.94</sub>Al<sub>1.06</sub>)(Fe<sup>2+</sup><sub>0.37</sub>Mg<sub>2.37</sub>Li<sub>0.04</sub>Fe<sup>3+</sup><sub>0.02</sub>Ti<sub>0.15</sub>Al<sub>0.07</sub>)</td>
      <td>4</td>
      <td>0.717</td>
      <td>9.251</td>
      <td>biotite</td>
    </tr>
    <tr>
      <td>(Si<sub>2.79</sub>Al<sub>1.21</sub>)(Fe<sup>2+</sup><sub>1.13</sub>Mg<sub>1.11</sub>Li<sub>0.03</sub>Fe<sup>3+</sup><sub>0.18</sub>Ti<sub>0.15</sub>Al<sub>0.25</sub>)</td>
      <td>5</td>
      <td>0.717</td>
      <td>9.261</td>
      <td>biotite</td>
    </tr>
  </tbody>
</table>

Radoslovich & Norrish (1962) as named in the paper
<table>
  <tbody>
    <tr>
      <td>(Si<sub>3.00</sub>Al<sub>1.00</sub>)(Fe<sup>2+</sup><sub>1.06</sub>Mg<sub>1.54</sub>Li<sub>0.07</sub>Mn<sub>0.06</sub>Fe<sup>3+</sup><sub>0.11</sub>Ti<sub>0.13</sub>Al<sub>0.01</sub>)</td>
      <td>6</td>
      <td>0.736</td>
      <td>9.251</td>
    </tr>
    <tr>
      <td>(Si<sub>2.66</sub>Al<sub>1.34</sub>)(Fe<sup>2+</sup><sub>1.33</sub>Mg<sub>0.68</sub>Li<sub>0.02</sub>Mn<sub>0.02</sub>Fe<sup>3+</sup><sub>0.08</sub>Ti<sub>0.17</sub>Al<sub>0.50</sub>)</td>
      <td>9</td>
      <td>0.707</td>
      <td>9.254</td>
    </tr>
    <tr>
      <td>(Si<sub>2.78</sub>Al<sub>1.22</sub>)(Fe<sup>2+</sup><sub>1.34</sub>Mg<sub>0.94</sub>Li<sub>0.01</sub>Mn<sub>0.02</sub>Fe<sup>3+</sup><sub>0.18</sub>Ti<sub>0.16</sub>Al<sub>0.26</sub>)</td>
      <td>11</td>
      <td>0.721</td>
      <td>9.262</td>
    </tr>
    <tr>
      <td>(Si<sub>2.54</sub>Al<sub>1.43</sub>)(Fe<sup>2+</sup><sub>1.42</sub>Mg<sub>0.51</sub>Mn<sub>0.14</sub>Fe<sup>3+</sup><sub>0.76</sub>Ti<sub>0.06</sub>)</td>
      <td>13</td>
      <td>0.733</td>
      <td>9.308</td>
    </tr>
    <tr>
      <td>(Si<sub>2.74</sub>Al<sub>1.26</sub>)(Fe<sup>2+</sup><sub>1.27</sub>Mg<sub>0.88</sub>Li<sub>0.03</sub>Mn<sub>0.02</sub>Fe<sup>3+</sup><sub>0.16</sub>Ti<sub>0.12</sub>Al<sub>0.38</sub>)</td>
      <td>14</td>
      <td>0.714</td>
      <td>9.246</td>
    </tr>
    <tr>
      <td>(Si<sub>2.73</sub>Al<sub>1.27</sub>)(Fe<sup>2+</sup><sub>1.19</sub>Mg<sub>1.24</sub>Li<sub>0.01</sub>Mn<sub>0.01</sub>Fe<sup>3+</sup><sub>0.09</sub>Ti<sub>0.14</sub>Al<sub>0.24</sub>)</td>
      <td>16</td>
      <td>0.722</td>
      <td>9.253</td>
    </tr>
    <tr>
      <td>(Si<sub>2.78</sub>Al<sub>1.22</sub>)(Fe<sup>2+</sup><sub>1.72</sub>Mg<sub>0.28</sub>Li<sub>0.04</sub>Mn<sub>0.03</sub>Fe<sup>3+</sup><sub>0.44</sub>Ti<sub>0.18</sub>Al<sub>0.13</sub>)</td>
      <td>18</td>
      <td>0.731</td>
      <td>9.328</td>
    </tr>
    <tr>
      <td>(Si<sub>2.81</sub>Al<sub>1.19</sub>)(Fe<sup>2+</sup><sub>1.05</sub>Mg<sub>1.05</sub>Fe<sup>3+</sup><sub>0.26</sub>Ti<sub>0.19</sub>Al<sub>0.36</sub>)</td>
      <td>19</td>
      <td>0.705</td>
      <td>9.266</td>
    </tr>
    <tr>
      <td>(Si<sub>2.99</sub>Al<sub>1.01</sub>)(Fe<sup>2+</sup><sub>1.82</sub>Mg<sub>0.69</sub>Fe<sup>3+</sup><sub>0.09</sub>Ti<sub>0.33</sub>Al<sub>0.40</sub>)</td>
      <td>20</td>
      <td>0.717</td>
      <td>9.300</td>
    </tr>
    <tr>
      <td>(Si<sub>2.99</sub>Al<sub>1.01</sub>)(Fe<sup>2+</sup><sub>1.80</sub>Mg<sub>0.51</sub>Fe<sup>3+</sup><sub>0.23</sub>Ti<sub>0.19</sub>Al<sub>0.37</sub>)</td>
      <td>21</td>
      <td>0.720</td>
      <td>9.323</td>
    </tr>
    <tr>
      <td>(Si<sub>2.88</sub>Al<sub>1.12</sub>)(Fe<sup>2+</sup><sub>1.00</sub>Mg<sub>1.18</sub>Fe<sup>3+</sup><sub>0.26</sub>Ti<sub>0.31</sub>)</td>
      <td>22</td>
      <td>0.722</td>
      <td>9.260</td>
    </tr>
    <tr>
      <td>(Si<sub>2.88</sub>Al<sub>1.12</sub>)(Fe<sup>2+</sup><sub>1.09</sub>Mg<sub>1.27</sub>Fe<sup>3+</sup><sub>0.19</sub>Ti<sub>0.17</sub>Al<sub>0.38</sub>)</td>
      <td>23</td>
      <td>0.708</td>
      <td>9.271</td>
    </tr>
    <tr>
      <td>(Si<sub>3.01</sub>Al<sub>0.99</sub>)(Fe<sup>2+</sup><sub>1.33</sub>Mg<sub>0.93</sub>Mn<sub>0.01</sub>Fe<sup>3+</sup><sub>0.23</sub>Ti<sub>0.21</sub>Al<sub>0.30</sub>)</td>
      <td>24</td>
      <td>0.715</td>
      <td>9.265</td>
    </tr>
    <tr>
      <td>(Si<sub>2.99</sub>Al<sub>0.95</sub>)(Fe<sup>2+</sup><sub>0.23</sub>Mg<sub>2.15</sub>Fe<sup>3+</sup><sub>0.12</sub>Ti<sub>0.48</sub>)</td>
      <td>25</td>
      <td>0.703</td>
      <td>9.241</td>
    </tr>
    <tr>
      <td>(Si<sub>3.02</sub>Al<sub>0.98</sub>)(Fe<sup>2+</sup><sub>0.04</sub>Mg<sub>2.98</sub>Fe<sup>3+</sup><sub>0.02</sub>Al<sub>0.16</sub>)</td>
      <td>26</td>
      <td>0.711</td>
      <td>9.220</td>
    </tr>
    <tr>
      <td>(Si<sub>3.01</sub>Al<sub>1.01</sub>)(Mg<sub>3</sub>)</td>
      <td>29</td>
      <td>0.720</td>
      <td>9.188</td>
    </tr>
    <tr>
      <td>(Si<sub>3.11</sub>Al<sub>0.89</sub>)(Al<sub>1.84</sub>Fe<sup>3+</sup><sub>0.12</sub>Mg<sub>0.06</sub>)</td>
      <td>30</td>
      <td>0.547</td>
      <td>8.995</td>
    </tr>
    <tr>
      <td>(Si<sub>3.27</sub>Al<sub>0.73</sub>)(Al<sub>1.27</sub>Fe<sup>3+</sup><sub>0.42</sub>Fe<sup>2+</sup><sub>0.15</sub>Mg<sub>0.19</sub>)</td>
      <td>31</td>
      <td>0.593</td>
      <td>9.060</td>
    </tr>
    <tr>
      <td>(Si<sub>3.58</sub>Al<sub>0.42</sub>)(Fe<sup>2+</sup><sub>0.01</sub>Mg<sub>0.02</sub>Li<sub>1.36</sub>Mn<sub>0.03</sub>Al<sub>1.32</sub>)</td>
      <td>33</td>
      <td>0.652</td>
      <td>9.006</td>
    </tr>
    <tr>
      <td>(Si<sub>3.21</sub>Al<sub>0.79</sub>)(Fe<sup>2+</sup><sub>0.02</sub>Mg<sub>0.02</sub>Li<sub>1.35</sub>Fe<sup>3+</sup><sub>0.09</sub>Al<sub>0.82</sub>)</td>
      <td>34</td>
      <td>0.675</td>
      <td>8.970</td>
    </tr>
    <tr>
      <td>(Si<sub>3.6</sub>Al<sub>0.4</sub>)(Fe<sup>3+</sup><sub>1.4</sub>Mg<sub>0.7</sub>)</td>
      <td>35</td>
      <td>0.670</td>
      <td>9.020</td>
    </tr>
    <tr>
      <td>Si<sub>4</sub>(Al<sub>0.07</sub>Fe<sup>3+</sup><sub>0.93</sub>Fe<sup>2+</sup><sub>0.24</sub>Mg<sub>0.77</sub>)</td>
      <td>36</td>
      <td>0.686</td>
      <td>9.050</td>
    </tr>
    <tr>
      <td>(Si<sub>3.86</sub>Al<sub>0.14</sub>)(Al<sub>0.75</sub>Fe<sup>3+</sup><sub>0.36</sub>Fe<sup>2+</sup><sub>0.2</sub>Mg<sub>0.68</sub>)</td>
      <td>37</td>
      <td>0.643</td>
      <td>9.060</td>
    </tr>
    <tr>
      <td>(Si<sub>3.74</sub>Al<sub>0.26</sub>)(Al<sub>0.18</sub>Fe<sup>3+</sup><sub>1</sub>Fe<sup>2+</sup><sub>0.57</sub>Mg<sub>0.57</sub>)</td>
      <td>38</td>
      <td>0.688</td>
      <td>9.080</td>
    </tr>
    <tr>
      <td>(Si<sub>3.28</sub>Al<sub>0.72</sub>)(Fe<sup>2+</sup><sub>0.60</sub>Li<sub>1.05</sub>Mn<sub>0.02</sub>Fe<sup>3+</sup><sub>0.06</sub>Al<sub>1.08</sub>)</td>
      <td>39</td>
      <td>0.651</td>
      <td>9.120</td>
    </tr>
    <tr>
      <td>(Si<sub>3.46</sub>Al<sub>0.54</sub>)(Fe<sup>2+</sup><sub>0.33</sub>Mg<sub>0.02</sub>Li<sub>1.15</sub>Mn<sub>0.03</sub>Fe<sup>3+</sup><sub>0.05</sub>Ti<sub>0.02</sub>Al<sub>1.16</sub>)</td>
      <td>40</td>
      <td>0.665</td>
      <td>9.060</td>
    </tr>
    <tr>
      <td>(Si<sub>2.95</sub>Al<sub>1.05</sub>)(Fe<sup>2+</sup><sub>1.19</sub>Mg<sub>0.06</sub>Li<sub>0.45</sub>Mn<sub>0.02</sub>Fe<sup>3+</sup><sub>0.03</sub>Ti<sub>0.02</sub>Al<sub>0.95</sub>)</td>
      <td>41</td>
      <td>0.692</td>
      <td>9.210</td>
    </tr>
    <tr>
      <td>(Si<sub>3.23</sub>Al<sub>0.77</sub>)(Fe<sup>2+</sup><sub>0.60</sub>Mg<sub>0.02</sub>Li<sub>1.01</sub>Mn<sub>0.08</sub>Fe<sup>3+</sup><sub>0.03</sub>Al<sub>1.00</sub>)</td>
      <td>42</td>
      <td>0.683</td>
      <td>9.090</td>
    </tr>
    <tr>
      <td>(Si<sub>3.19</sub>Al<sub>0.77</sub>)(Mg<sub>0.40</sub>Ti<sub>0.04</sub>Al<sub>1.48</sub>)</td>
      <td>43</td>
      <td>0.575</td>
      <td>9.040</td>
    </tr>
    <tr>
      <td>(Si<sub>2.57</sub>Al<sub>1.43</sub>)(Fe<sup>2+</sup><sub>1.46</sub>Mg<sub>0.68</sub>Fe<sup>3+</sup><sub>0.35</sub>Ti<sub>0.23</sub>Al<sub>0.07</sub>)</td>
      <td>44</td>
      <td>0.728</td>
      <td>9.290</td>
    </tr>
    <tr>
      <td>(Si<sub>2</sub>Al<sub>2</sub>)(Al<sub>2</sub>) Ca</td>
      <td>45</td>
      <td>0.535</td>
      <td>8.920</td>
    </tr>
    <tr>
      <td>(Si<sub>1.95</sub>Al<sub>2.05</sub>)(Fe<sup>2+</sup><sub>0.02</sub>Mg<sub>0.04</sub>Li<sub>0.40</sub>Al<sub>1.90</sub>Fe<sup>2+</sup><sub>0.03</sub>) Na</td>
      <td>46</td>
      <td>0.572</td>
      <td>8.896</td>
    </tr>
    <tr>
      <td>(Si<sub>1.05</sub>Al<sub>2.95</sub>)(Mg<sub>2.18</sub>Al<sub>0.72</sub>) Ca</td>
      <td>47</td>
      <td>0.674</td>
      <td>9.000</td>
    </tr>
    <tr>
      <td>(Si<sub>1.17</sub>Al<sub>2.83</sub>)(Fe<sup>2+</sup><sub>0.02</sub>Mg<sub>2.09</sub>Fe<sup>3+</sup><sub>0.15</sub>Al<sub>0.70</sub>) Ca</td>
      <td>48</td>
      <td>0.673</td>
      <td>9.010</td>
    </tr>
    <tr>
      <td>(Si<sub>1.22</sub>Al<sub>2.78</sub>)(Fe<sup>2+</sup><sub>0.06</sub>Mg<sub>2.23</sub>Fe<sup>3+</sup><sub>0.04</sub>Al<sub>0.72</sub>) Ca</td>
      <td>49</td>
      <td>0.677</td>
      <td>9.000</td>
    </tr>
    <tr>
      <td>(Si<sub>1.16</sub>Al<sub>2.84</sub>)(Fe<sup>2+</sup><sub>0.04</sub>Mg<sub>2.14</sub>Fe<sup>3+</sup><sub>0.08</sub>Al<sub>0.76</sub>) Ca</td>
      <td>50</td>
      <td>0.672</td>
      <td>9.020</td>
    </tr>
    <tr>
      <td>(Si<sub>2.17</sub>Al<sub>0.69</sub>Be<sub>1.14</sub>)(Li<sub>0.63</sub>Al<sub>2.09</sub>) Ca</td>
      <td>51</td>
      <td>0.587</td>
      <td>8.713</td>
    </tr>
  </tbody>
</table>

biotite
biotite
biotite
biotite
biotite
biotite
biotite
biotite
phlogopite
phlogopite
fluorophlogopite
muscovite
iron-muscovite
lepidolite
lepidolite
celadonite
celadonite
celadonite
celadonite
zinwaldite
zinwaldite
lithium biotite
lithium biotite
gümbelite
lepidomelane
margarite
ephesite
xanthophyllite
xanthophyllite
xanthophyllite
xanthophyllite
bityite
(Si₂.₀₆Al₁.₅₉Be₀.₃₅)(Mg₀.₀₁Li₀.₇₁Al₁.₅₈) Ca 52 0.605 8.670 bityite

Hendricksites

(available composition)

<table><tr><td>Mg₀.₂₅Fe²⁺₀.₀₃Mn₁.₂₂Zn₁.₅₀</td><td>1</td><td>0.775</td><td>9.338</td></tr><tr><td>Mg₀.₄₅Fe²⁺₀.₀₂Mn₁.₀₅Zn₁.₄₈</td><td>2</td><td>0.769</td><td>9.328</td></tr><tr><td>(Si₂.₆₆₄Al₁.₃₆)(Al₀.₀₂Mg₀.₄₆Ti₀.₀₄Fe³⁺₀.₁₄Fe²⁺₀.₀₂Zn₁.₄₃Mn₀.₈₈)</td><td>3</td><td>0.756</td><td>9.324</td></tr><tr><td>(Si₂.₇₂₇Al₁.₂₆₆)(Mg₀.₂₃Ti₀.₀₁Fe³⁺₀.₃₁Fe²⁺₀.₀₅Zn₁.₃₆Mn₁.₀₁)</td><td>4</td><td>0.759</td><td>9.324</td></tr><tr><td>Mg₀.₄₂Fe³⁺₀.₃Fe²⁺₀.₀₈Mn₀.₈₁Zn₁.₃₉</td><td>5</td><td>0.753</td><td>9.332</td></tr><tr><td>Mg₀.₄₅Fe²⁺₀.₀₂Mn₀.₈₈Zn₁.₇₅</td><td>6</td><td>0.760</td><td>9.301</td></tr><tr><td>Mg₁.₆₆Fe²⁺₀.₂₅Mn₀.₃₄Zn₀.₇₅</td><td>7</td><td>0.742</td><td>9.257</td></tr><tr><td>Mg₁.₆₀Fe²⁺₀.₃₄Mn₀.₃₆Zn₀.₇₀</td><td>8</td><td>0.745</td><td>9.222</td></tr><tr><td>Mg₂.₉₁Fe²⁺₀.₀₈Mn₀.₀₀₁Zn₀.₀₁</td><td>9</td><td>0.722</td><td>9.180</td></tr></table>

Frondel & Ito (1966)

Manganophyllite

(Si₂.₇₉Al₁.₂₁)(Al₀.₁₁Ti₀.₀₁ Fe³⁺₀.₁₇Mg₂.₅₁ Mn₀.₁₃) manganophyllite 0.713 9.221

Knurr & Bailey (1986)

Celadonites

(Si₃.₉₄Al₀.₀₆) (Al₀.₀₅Fe³⁺₁.₁₅Fe²⁺₀.₃₆Mg₀.₄₁Ti₀.₀₁) 3 0.682 9.050

Brigatti & Guggenheim (2002)

true mica-1M space group

(Si₃.₈₈Al₀.₁₂)(Al₀.₆₂Fe³⁺₀.₆₄Fe²⁺₀.₁₃Mg₀.₆₁) 11 0.643 9.000
(Si₃.₇₈Al₀.₂₂)(Al₀.₂₀Fe³⁺₀.₁₀Fe²⁺₀.₂₈Mg₀.₅₇) 13 0.673 9.042
(Si₃.₇₃Al₀.₂₇)(Al₀.₃₀Fe³⁺₀.₁₀Fe²⁺₀.₂₀Mg₀.₆₆) 14 0.665 9.102
(Si₃.₉₀Al₀.₁₀)(Al₀.₃₆Fe³⁺₀.₇₇Fe²⁺₀.₂₁Mg₀.₆₈) 15 0.665 9.054
(Si₃.₈₈Al₀.₁₂)(Al₁.₃₃Fe³⁺₀.₀₁Fe²⁺₀.₀₂Mg₀.₅₄) 16 0.591 9.000

Wise & Eugster (1965)

(Si₃.₆Al₀.₄)(Fe³⁺₁.₄Mg₀.₇) 35 0.670 9.020
Si₄(Al₀.₀₇Fe³⁺₀.₉₃Fe²⁺₀.₂₄Mg₀.₇₇) 36 0.686 9.050
(Si₃.₈₆Al₀.₁₄)(Al₀.₇₅Fe³⁺₀.₃₆Fe²⁺₀.₂Mg₀.₆₈) 37 0.643 9.060
(Si₃.₇₄Al₀.₂₆)(Al₀.₁₈Fe³⁺₁Fe²⁺₀.₅₇Mg₀.₅₇) 38 0.688 9.080

Radoslovich & Norrish (1962)

Si₄.₀₁(Al₀.₁₅Fe³⁺₀.₈₁Fe²⁺₀.₃₉Mg₀.₇₅) A 0.689 9.053#
Si₄.₀₉(Al₀.₃₈Fe³⁺₀.₄₉Fe²⁺₀.₃₇Mg₀.₇₁) B 0.676 9.044#
(Si₃.₈₃Al₀.₁₇)(Al₀.₂₈Fe³⁺₀.₇₈Fe²⁺₀.₂₂Mg₀.₆₉Ti₀.₀₁) C 0.670 9.052#
(Si₃.₉₆Al₀.₀₄)(Al₀.₁₈Fe³⁺₀.₈₇Fe²⁺₀.₂₄Mg₀.₇₁) D 0.678 9.050#

Buckley et al. (1978)

*extracted from Fig. 3
<table><tr><td>Si<sub>4.01</sub>(Al<sub>0.58</sub>Fe<sup>3+</sup><sub>0.56</sub>Fe<sup>2+</sup><sub>0.24</sub>Mg<sub>0.53</sub>)</td><td>E</td><td>0.649</td><td>9.047#</td></tr><tr><td>Si<sub>4.01</sub>(Al<sub>0.13</sub>Fe<sup>3+</sup><sub>0.95</sub>Fe<sup>2+</sup><sub>0.26</sub>Mg<sub>0.64</sub>)</td><td>F</td><td>0.680</td><td>9.053#</td></tr><tr><td>(Si<sub>3.95</sub>Al<sub>0.05</sub>)(Al<sub>0.02</sub>Fe<sup>3+</sup><sub>1.08</sub>Fe<sup>2+</sup><sub>0.19</sub>Mg<sub>0.71</sub>)</td><td>G</td><td>0.683</td><td>9.061#</td></tr><tr><td>(Si<sub>3.99</sub>Al<sub>0.01</sub>)(Al<sub>0.41</sub>Fe<sup>3+</sup><sub>0.75</sub>Fe<sup>2+</sup><sub>0.25</sub>Mg<sub>0.45</sub>)</td><td>H</td><td>0.657</td><td>9.043#</td></tr><tr><td>(Si<sub>3.83</sub>Al<sub>0.17</sub>)(Al<sub>0.1</sub>Fe<sup>3+</sup><sub>0.77</sub>Fe<sup>2+</sup><sub>0.19</sub>Mg<sub>1.08</sub>)</td><td>I</td><td>0.690</td><td>9.051#</td></tr><tr><td>(Si<sub>3.91</sub>Al<sub>0.09</sub>)(Al<sub>0.39</sub>Fe<sup>3+</sup><sub>0.66</sub>Fe<sup>2+</sup><sub>0.2</sub>Mg<sub>0.72</sub>Ti<sub>0.01</sub>)</td><td>Q</td><td>0.664</td><td>9.048#</td></tr><tr><td>(Si<sub>3.95</sub>Al<sub>0.05</sub>)(Al<sub>0.15</sub>Fe<sup>3+</sup><sub>1.24</sub>Fe<sup>2+</sup><sub>0.13</sub>Mg<sub>0.37</sub>Ti<sub>0.01</sub>)</td><td>BM32709</td><td>0.660</td><td>9.069#</td></tr></table>

## Glauconites

<table><tr><td>(Si<sub>3.57</sub>Al<sub>0.43</sub>)(Al<sub>0.21</sub>Fe<sup>3+</sup><sub>1.02</sub>Fe<sup>2+</sup><sub>0.64</sub>Mg<sub>0.26</sub>)</td><td>1L</td><td>0.684</td><td>9.091#</td></tr><tr><td>(Si<sub>3.62</sub>Al<sub>0.38</sub>)(Al<sub>0.42</sub>Fe<sup>3+</sup><sub>0.96</sub>Fe<sup>2+</sup><sub>0.43</sub>Mg<sub>0.28</sub>)</td><td>5D</td><td>0.661</td><td>9.088#</td></tr><tr><td>(Si<sub>3.77</sub>Al<sub>0.23</sub>)(Al<sub>0.31</sub>Fe<sup>3+</sup><sub>0.95</sub>Fe<sup>2+</sup><sub>0.37</sub>Mg<sub>0.42</sub>)</td><td>9D</td><td>0.668</td><td>9.069#</td></tr><tr><td>(Si<sub>3.81</sub>Al<sub>0.19</sub>)(Al<sub>0.44</sub>Fe<sup>3+</sup><sub>0.82</sub>Fe<sup>2+</sup><sub>0.51</sub>Mg<sub>0.30</sub>)</td><td>11D</td><td>0.666</td><td>9.081#</td></tr><tr><td>(Si<sub>3.77</sub>Al<sub>0.23</sub>)(Al<sub>0.36</sub>Fe<sup>3+</sup><sub>0.98</sub>Fe<sup>2+</sup><sub>0.21</sub>Mg<sub>0.46</sub>)</td><td>12D</td><td>0.657</td><td>9.073#</td></tr><tr><td>(Si<sub>3.77</sub>Al<sub>0.23</sub>)(Al<sub>0.35</sub>Fe<sup>3+</sup><sub>0.99</sub>Fe<sup>2+</sup><sub>0.21</sub>Mg<sub>0.45</sub>)</td><td>13D</td><td>0.657</td><td>9.072#</td></tr><tr><td>(Si<sub>3.76</sub>Al<sub>0.24</sub>)(Al<sub>0.42</sub>Fe<sup>3+</sup><sub>0.92</sub>Fe<sup>2+</sup><sub>0.21</sub>Mg<sub>0.49</sub>)</td><td>14D</td><td>0.654</td><td>9.072#</td></tr><tr><td>(Si<sub>3.75</sub>Al<sub>0.25</sub>)(Al<sub>0.36</sub>Fe<sup>3+</sup><sub>0.98</sub>Fe<sup>2+</sup><sub>0.24</sub>Mg<sub>0.45</sub>)</td><td>15D</td><td>0.658</td><td>9.073#</td></tr><tr><td>(Si<sub>3.79</sub>Al<sub>0.21</sub>)(Al<sub>0.33</sub>Fe<sup>3+</sup><sub>0.99</sub>Fe<sup>2+</sup><sub>0.26</sub>Mg<sub>0.45</sub>)</td><td>16D</td><td>0.661</td><td>9.070#</td></tr><tr><td>(Si<sub>3.77</sub>Al<sub>0.23</sub>)(Al<sub>0.32</sub>Fe<sup>3+</sup><sub>0.97</sub>Fe<sup>2+</sup><sub>0.23</sub>Mg<sub>0.39</sub>)</td><td>16L</td><td>0.658</td><td>9.077#</td></tr><tr><td>(Si<sub>3.65</sub>Al<sub>0.35</sub>)(Al<sub>0.45</sub>Fe<sup>3+</sup><sub>0.91</sub>Fe<sup>2+</sup><sub>0.15</sub>Mg<sub>0.40</sub>)</td><td>18B</td><td>0.645</td><td>9.079#</td></tr><tr><td>(Si<sub>3.69</sub>Al<sub>0.31</sub>)(Al<sub>0.40</sub>Fe<sup>3+</sup><sub>1.05</sub>Fe<sup>2+</sup><sub>0.15</sub>Mg<sub>0.41</sub>)</td><td>19</td><td>0.648</td><td>9.078#</td></tr><tr><td>(Si<sub>3.57</sub>Al<sub>0.43</sub>)(Al<sub>0.37</sub>Fe<sup>3+</sup><sub>1.15</sub>Fe<sup>2+</sup><sub>0.17</sub>Mg<sub>0.33</sub>)</td><td>21</td><td>0.648</td><td>9.089#</td></tr><tr><td>(Si<sub>3.34</sub>Al<sub>0.66</sub>)(Fe<sup>3+</sup><sub>1.42</sub>Fe<sup>2+</sup><sub>0.60</sub>Mg<sub>0.29</sub>)</td><td>23L</td><td>0.689</td><td>9.108#</td></tr><tr><td>(Si<sub>3.69</sub>Al<sub>0.31</sub>)(Al<sub>0.08</sub>Fe<sup>3+</sup><sub>1.26</sub>Fe<sup>2+</sup><sub>0.12</sub>Mg<sub>0.55</sub>)</td><td>27L</td><td>0.669</td><td>9.100#</td></tr><tr><td>(Si<sub>3.83</sub>Al<sub>0.17</sub>)(Al<sub>0.04</sub>Fe<sup>3+</sup><sub>1.17</sub>Fe<sup>2+</sup><sub>0.13</sub>Mg<sub>0.72</sub>)</td><td>29D</td><td>0.678</td><td>9.093#</td></tr><tr><td>(Si<sub>3.82</sub>Al<sub>0.1</sub>)(Al<sub>0.13</sub>Fe<sup>3+</sup><sub>1.16</sub>Fe<sup>2+</sup><sub>0.13</sub>Mg<sub>0.60</sub>)</td><td>34D</td><td>0.669</td><td>9.088#</td></tr><tr><td>(Si<sub>3.81</sub>Al<sub>0.19</sub>)(Fe<sup>3+</sup><sub>1.78</sub>Fe<sup>2+</sup><sub>0.09</sub>Mg<sub>0.43</sub>)</td><td>35L</td><td>0.664</td><td>9.125#</td></tr></table>

## Al-rich illite and phengite

<table><tr><td>(Si<sub>3.40</sub>Al<sub>0.60</sub>)(Al<sub>1.75</sub>Fe<sup>3+</sup><sub>0.08</sub>Fe<sup>2+</sup><sub>0.01</sub>Mg<sub>0.15</sub>)</td><td>3</td><td>0.555</td><td>9.000</td></tr><tr><td>(Si<sub>3.41</sub>Al<sub>0.59</sub>)(Al<sub>1.66</sub>Fe<sup>3+</sup><sub>0.06</sub>Fe<sup>2+</sup><sub>0.02</sub>Mg<sub>0.28</sub>)</td><td>6</td><td>0.566</td><td>9.005</td></tr><tr><td>(Si<sub>3.63</sub>Al<sub>0.37</sub>)(Al<sub>1.41</sub>Fe<sup>3+</sup><sub>0.10</sub>Fe<sup>2+</sup><sub>0.07</sub>Mg<sub>0.42</sub>)</td><td>7</td><td>0.588</td><td>9.018</td></tr><tr><td>(Si<sub>3.51</sub>Al<sub>0.49</sub>)(Al<sub>1.83</sub>Fe<sup>3+</sup><sub>0.03</sub>Fe<sup>2+</sup><sub>0.04</sub>Mg<sub>0.10</sub>)</td><td>8</td><td>0.551</td><td>8.952</td></tr><tr><td>(Si<sub>3.25</sub>Al<sub>0.75</sub>)(Al<sub>1.84</sub>Fe<sup>3+</sup><sub>0.09</sub>Mg<sub>0.08</sub>)</td><td>9</td><td>0.547</td><td>8.998</td></tr><tr><td>(Si<sub>3.45</sub>Al<sub>0.55</sub>)(Al<sub>1.57</sub>Fe<sup>3+</sup><sub>0.13</sub>Mg<sub>0.28</sub>)</td><td>10</td><td>0.568</td><td>9.012</td></tr><tr><td>(Si<sub>3.44</sub>Al<sub>0.56</sub>)(Al<sub>1.27</sub>Fe<sup>3+</sup><sub>0.40</sub>Fe<sup>2+</sup><sub>0.13</sub>Mg<sub>0.24</sub>)</td><td>11</td><td>0.594</td><td>9.046</td></tr><tr><td>(Si<sub>3.54</sub>Al<sub>0.46</sub>)(Al<sub>1.24</sub>Fe<sup>3+</sup><sub>0.24</sub>Fe<sup>2+</sup><sub>0.12</sub>Mg<sub>0.44</sub>)</td><td>12</td><td>0.602</td><td>9.042</td></tr></table>

Buckley *et al.* (1978)

*extracted from Fig. 3

Drits *et al.* (2006)
<table><tr><td>(Si<sub>3.80</sub>Al<sub>0.20</sub>) (Al<sub>1.16</sub>Fe<sup>3+0.09</sup>Fe<sup>2+0.17</sup>Mg<sub>0.57</sub>)</td><td>13</td><td>0.614</td><td>9.006</td></tr><tr><td>(Si<sub>3.80</sub>Al<sub>0.20</sub>) (Al<sub>1.18</sub>Fe<sup>3+0.25</sup>Fe<sup>2+0.01</sup>Mg<sub>0.56</sub>)</td><td>14</td><td>0.602</td><td>9.007</td></tr><tr><td>(Si<sub>3.40</sub>Al<sub>0.60</sub>) (Al<sub>1.68</sub>Fe<sup>3+0.14</sup>Mg<sub>0.20</sub>)</td><td>15</td><td>0.561</td><td>9.006</td></tr><tr><td>(Si<sub>3.27</sub>Al<sub>0.73</sub>) (Al<sub>1.85</sub>Fe<sup>3+0.04</sup>Mg<sub>0.15</sub>)</td><td>16a</td><td>0.551</td><td>9.000</td></tr><tr><td>(Si<sub>3.28</sub>Al<sub>0.72</sub>) (Al<sub>1.87</sub>Fe<sup>3+0.04</sup>Mg<sub>0.11</sub>)</td><td>17a</td><td>0.547</td><td>8.994</td></tr><tr><td>(Si<sub>3.47</sub>Al<sub>0.53</sub>) (Al<sub>1.76</sub>Fe<sup>3+0.04</sup>Mg<sub>0.26</sub>Ti<sub>0.01</sub>)</td><td>19</td><td>0.561</td><td>9.006</td></tr><tr><td>(Si<sub>3.39</sub>Al<sub>0.61</sub>) (Al<sub>1.60</sub>Fe<sup>3+0.20</sup>Mg<sub>0.24</sub>Ti<sub>0.01</sub>)</td><td>21</td><td>0.568</td><td>9.005</td></tr><tr><td>(Si<sub>3.39</sub>Al<sub>0.61</sub>) (Al<sub>1.54</sub>Fe<sup>3+0.14</sup>Mg<sub>0.335</sub>Ti<sub>0.02</sub>)</td><td>22</td><td>0.574</td><td>9.005</td></tr><tr><td>(Si<sub>3.42</sub>Al<sub>0.58</sub>) (Al<sub>1.58</sub>Fe<sup>3+0.11</sup>Mg<sub>0.29</sub>Ti<sub>0.01</sub>)</td><td>23</td><td>0.568</td><td>9.005</td></tr><tr><td>(Si<sub>3.48</sub>Al<sub>0.52</sub>) (Al<sub>1.73</sub>Fe<sup>3+0.06</sup>Mg<sub>0.20</sub>Ti<sub>0.01</sub>)</td><td>24</td><td>0.557</td><td>9.005</td></tr><tr><td>(Si<sub>3.30</sub>Al<sub>0.70</sub>) (Al<sub>1.90</sub>Fe<sup>3+0.02</sup>Mg<sub>0.08</sub>Ti<sub>0.04</sub>)</td><td>25</td><td>0.545</td><td>9.005</td></tr></table>

#original compositions were with Ti in tetrahedra (except sample 45). Ti was reallocated to octahedral sites, and the corresponding amount of octahedral Al was moved to tetrahedral sites. XRD data were available in a Table which has been kindly provided to us by the author M. Rieder

<table><caption>Table 7. Parameters of the regressions calculated for the synthetic micas (Figs. 15 to 19).</caption><thead><tr><th>Regression type</th><th>b = R.A+B</th><th>R<sup>2</sup></th><th>Number of points</th><th>b/b<sub>tet</sub> = R.C+D</th><th>R<sup>2</sup></th><th>%O enlargement = R.E+F</th><th>R<sup>2</sup></th></tr></thead><tbody><tr><td>(M-Ph)</td><td>K(Si<sub>3</sub>Al)(Mg<sub>3/2</sub>Al<sub>2-x</sub>□<sub>1-x/2</sub>)O<sub>10</sub>(OH)<sub>2</sub><br>b = R*1.1478 + 8.3794</td><td></td><td></td><td>b/b<sub>tet</sub> = R*0.1229 + 0.8975</td><td></td><td>%O enlargement = -37.514.R + 24.23</td><td></td></tr><tr><td>(Ph-A)</td><td>K(Si<sub>3</sub>Al<sub>1</sub>)(Mg<sub>x</sub>Fe<sup>2+3-x</sup>)O<sub>10</sub>(OH)<sub>2</sub><br>b = R*2.3942 + 7.4821</td><td></td><td></td><td>b/b<sub>tet</sub> = R*0.2564 + 0.8014</td><td></td><td>%O enlargement = -20.056.R + 11.66</td><td></td></tr><tr><td>Dioctahedral<br>Schmidt et al. (2001)</td><td>K(Si<sub>3-x</sub>Al<sub>1-x</sub>)(Al<sub>2-x</sub>Mg<sub>x</sub>)O<sub>10</sub>(OH)<sub>2</sub></td><td></td><td>16</td><td>b/b<sub>tet</sub> = R*0.2553 + 0.827</td><td>0.9805</td><td></td><td></td></tr><tr><td>Trioctahedral<br>Robert (1976)</td><td>K(Si<sub>3-x+2y</sub>Al<sub>1+x-2y</sub>)(Mg<sub>3-x-y</sub>Al<sub>x-y</sub>)O<sub>10</sub>(OH)<sub>2</sub></td><td></td><td></td><td></td><td></td><td></td><td></td></tr></tbody></table>
<table><tbody><tr><td>All except 29</td><td>b = R*1.1509 + 8.3841</td><td>0.9499</td><td>28 (y ≠ 0)</td><td>b/b<sub>tet</sub> = R*0.2515 + 0.8038</td><td>0.7894</td><td>%O enlargement = -35.19.R + 22.638</td><td>0.9935</td></tr><tr><td>y</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>0</td><td>b = R*0.8049 + 8.6308</td><td>0.9895</td><td>7</td><td>b/b<sub>tet</sub> = R*0.3972 + 0.7005</td><td>0.9995</td><td></td><td></td></tr><tr><td>0.025</td><td>b = R*1.5032 + 8.1349</td><td>-</td><td>2</td><td>b/b<sub>tet</sub> = R*0.4671 + 0.6518</td><td>-</td><td></td><td></td></tr><tr><td>0.05</td><td>b = R*1.6159 + 8.064</td><td>-</td><td>2</td><td>b/b<sub>tet</sub> = R*0.4744 + 0.6485</td><td>-</td><td></td><td></td></tr><tr><td>0.075</td><td>b = R*1.7865 + 7.9483</td><td>-</td><td>2</td><td>b/b<sub>tet</sub> = R*0.4919 + 0.6376</td><td>-</td><td></td><td></td></tr><tr><td>0.1</td><td>-</td><td>-</td><td>3</td><td>b/b<sub>tet</sub> = R*0.4511 + 0.6667</td><td>0.9982</td><td></td><td></td></tr><tr><td>0.125</td><td>b = R*0.4973 + 8.8279</td><td>-</td><td>2</td><td>b/b<sub>tet</sub> = R*0.3477 + 0.7382</td><td>-</td><td></td><td></td></tr><tr><td>0.15</td><td>b = R*0.7395 + 8.6638</td><td>-</td><td>2</td><td>b/b<sub>tet</sub> = R*0.3729 + 0.7221</td><td>-</td><td></td><td></td></tr><tr><td>0.175</td><td>-</td><td>-</td><td>3</td><td>b/b<sub>tet</sub> = R*0.378 + 0.7198</td><td>0.9922</td><td></td><td></td></tr><tr><td>0.225</td><td>b = R*0.5891 + 8.7583</td><td>-</td><td>2</td><td>b/b<sub>tet</sub> = R*0.3478 + 0.7416</td><td>-</td><td></td><td></td></tr><tr><td>y = 0.25 - 0.5x</td><td>b = R*-3.8609 + 11.918</td><td>0.9946</td><td>3</td><td>b/b<sub>tet</sub> = R*1.418 + 0.0188</td><td>0.9997</td><td></td><td></td></tr><tr><td>y = 0.5 - x</td><td>-</td><td>-</td><td>4 (x, y ≠ 0)</td><td>b/b<sub>tet</sub> = R*1.4313 - 0.0137</td><td>0.9879</td><td></td><td></td></tr><tr><td>y = 0.75 - 1.5x</td><td>b = R*1.3164 + 8.2673</td><td>0.9861</td><td>6 (y ≠ 0)</td><td>b/b<sub>tet</sub> = R*0.9411 + 0.3323</td><td>0.9994</td><td></td><td></td></tr><tr><td>y = 1 - 2x</td><td>b = R*1.1666 + 8.3777</td><td>0.8644</td><td>4 (y ≠ 0)</td><td>b/b<sub>tet</sub> = R*1.0084 + 0.2935</td><td>0.9409</td><td></td><td></td></tr><tr><td>y = 1.25 - 2.5x</td><td>-</td><td>-</td><td>3 (y ≠ 0)</td><td>b/b<sub>tet</sub> = R*0.6029 + 0.5694</td><td>0.9853</td><td></td><td></td></tr><tr><td>y = 1.5 - 3x</td><td>b = R*1.1509 + 8.33841</td><td>-</td><td>2 (y ≠ 0)</td><td>b/b<sub>tet</sub> = R*0.6368 + 0.5494</td><td>-</td><td></td><td></td></tr><tr><td>Hewitt & Wones (1975)</td><td>K(Si<sub>3-x</sub>Al<sub>1+x</sub>)(Mg<sub>x</sub>Fe<sup>2+3-x</sup>Al<sub>z</sub>)O<sub>10</sub>(OH)<sub>2</sub></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>All</td><td>b = R*1.8744 + 7.8968</td><td>0.8148</td><td>28</td><td>b/b<sub>tet</sub> = R*0.3274 + 0.7469</td><td>0.972</td><td>%O enlargement = -26.498.R + 16.754</td><td>0.8885</td></tr><tr><td>z</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>0</td><td>b = R*2.4105 + 7.4706</td><td>0.9991</td><td>6</td><td>b/b<sub>tet</sub> = R*0.2582 + 0.8001</td><td></td><td>%O enlargement = -20.271.R + 11.833</td><td>0.9985</td></tr><tr><td>0.25</td><td>b = R*2.6255 + 7.3529</td><td>0.9992</td><td>5</td><td>b/b<sub>tet</sub> = R*0.2798 + 0.7826</td><td></td><td>%O enlargement = -18.512.R + 10.86</td><td>0.9988</td></tr><tr><td>0.5</td><td>b = R*2.8435 + 7.2106</td><td>0.9992</td><td>8</td><td>b/b<sub>tet</sub> = R*0.3016 + 0.7648</td><td></td><td>%O enlargement = -16.649.R + 9.7787</td><td>0.9975</td></tr><tr><td>0.63</td><td>b = R*2.7579 + 7.2846</td><td>-</td><td>2</td><td>b/b<sub>tet</sub> = R*0.2582 + 0.8001</td><td></td><td>%O enlargement = -17.768.R + 10.716</td><td></td></tr><tr><td>0.75</td><td>b = R*2.9067 + 7.2006</td><td>0.9951</td><td>4</td><td>b/b<sub>tet</sub> = R*0.2918 + 0.7707</td><td></td><td>%O enlargement = -16.334.R + 9.9239</td><td>0.9838</td></tr><tr><td>K(Si<sub>3-x</sub>Al<sub>1+x</sub>)(Fe<sup>2+3-x</sup>Al<sub>z</sub>)O<sub>10</sub>(OH)<sub>2</sub></td><td>b = R*1.0552 + 8.5304</td><td>0.9662</td><td>7</td><td>b/b<sub>tet</sub> = R*0.3513 + 0.7277</td><td></td><td>%O enlargement = -34.453.R + 22.921</td><td>0.997</td></tr><tr><td>K(Si<sub>3-x</sub>Al<sub>1+x</sub>)(Mg<sub>x</sub>Al<sub>z</sub>)O<sub>10</sub>(OH)<sub>2</sub></td><td>b = R*1.1096 + 8.407</td><td>0.9912</td><td>5</td><td>b/b<sub>tet</sub> = R*0.4166 + 0.6859</td><td></td><td>%O enlargement = -35.267.R + 22.629</td><td>0.999</td></tr></tbody></table>
<table><caption>Table 8. Data used for chlorites. R: mean ionic radius of octahedral cations (Å) calculated with r(Li⁺) = 0.760 Å (see text). b: crystallographic parameter (Å). *Sample reference in the paper.</caption><thead><tr><th>Natural chlorites<br>(Anhydrous composition)</th><th>Sample*</th><th>R</th><th>b</th><th>References</th><th>Comments</th></tr></thead><tbody><tr><td><strong>Trioctahedral chlorites</strong></td><td></td><td></td><td></td><td>Wiewiora &amp; Wilamowski (1996)</td><td></td></tr><tr><td>(Si<sub>2.57</sub>Al<sub>1.43</sub>)(Al<sub>1.16</sub>Mg<sub>0.14</sub>Fe<sup>3+</sup><sub>0.36</sub>Mn<sup>2+</sup><sub>4.3</sub>)</td><td>1</td><td>0.759</td><td>9.500</td><td></td><td></td></tr><tr><td>(Si<sub>2.7</sub>Al<sub>1.3</sub>)(Al<sub>1.3</sub>Mg<sub>0.6</sub>Fe<sup>2+</sup><sub>0.2</sub>Mn<sup>2+</sup><sub>2.6</sub>Zn<sub>1.3</sub>)</td><td>2</td><td>0.734</td><td>9.400</td><td></td><td></td></tr><tr><td>(Si<sub>2.72</sub>Al<sub>1.28</sub>)(Al<sub>1.36</sub>Mg<sub>0.26</sub>Fe<sup>3+</sup><sub>0.39</sub>Mn<sup>2+</sup><sub>3.95</sub>)</td><td>3</td><td>0.746</td><td>9.470</td><td></td><td></td></tr><tr><td>(Si<sub>3.4</sub>Al<sub>0.6</sub>)(Al<sub>0.84</sub>Mg<sub>4.6</sub>Fe<sup>2+</sup><sub>0.28</sub>Fe<sup>3+</sup><sub>0.11</sub> Cr<sub>0.02</sub>Ni<sub>0.07</sub>)</td><td>4</td><td>0.694</td><td>9.216</td><td></td><td></td></tr><tr><td>(Si<sub>3</sub>Al<sub>1</sub>)(Al<sub>0.2</sub>Mg<sub>5</sub>Fe<sup>2+</sup><sub>0.1</sub>Cr<sub>0.7</sub>)</td><td>5</td><td>0.703</td><td>9.242</td><td></td><td></td></tr><tr><td>(Si<sub>2.8</sub>Al<sub>1.2</sub>)(Al<sub>1.2</sub>Mg<sub>2.6</sub>Fe<sup>2+</sup><sub>2.2</sub>)</td><td>6</td><td>0.705</td><td>9.290</td><td></td><td></td></tr><tr><td>(Si<sub>3.3</sub>Al<sub>0.7</sub>)(Al<sub>0.87</sub>Mg<sub>3.13</sub>Fe<sup>2+</sup><sub>2</sub>)</td><td>7</td><td>0.713</td><td>9.290</td><td></td><td></td></tr><tr><td>(Si<sub>2.4</sub>Al<sub>1.6</sub>)(Al<sub>0.85</sub>Mg<sub>0.7</sub>Fe<sup>2+</sup><sub>3.7</sub>Fe<sup>3+</sup><sub>0.75</sub>)<sup>#</sup></td><td>8</td><td>0.721</td><td>9.297</td><td>#typographical error original value :<br>Al<sub>0.85</sub>Mg<sub>0.7</sub>Fe<sup>2+</sup><sub>0.75</sub>Fe<sup>3+</sup><sub>3.7</sub></td><td></td></tr><tr><td>(Si<sub>2.62</sub>Al<sub>1.38</sub>)(Al<sub>1.17</sub>Mg<sub>2.82</sub>Fe<sup>2+</sup><sub>1.24</sub>Fe<sup>3+</sup><sub>0.52</sub>)</td><td>9</td><td>0.689</td><td>9.290</td><td></td><td></td></tr><tr><td>(Si<sub>2.8</sub>Al<sub>1.2</sub>)(Al<sub>1.28</sub>Mg<sub>4.3</sub>Fe<sup>2+</sup><sub>0.3</sub>Fe<sup>3+</sup><sub>0.06</sub>)</td><td>10</td><td>0.682</td><td>9.220</td><td></td><td></td></tr><tr><td>(Si<sub>2.67</sub>Al<sub>1.33</sub>)(Al<sub>2.1</sub>Mg<sub>3.35</sub>Fe<sup>2+</sup><sub>0.03</sub>Fe<sup>3+</sup><sub>0.09</sub>)</td><td>11</td><td>0.649</td><td>9.170</td><td></td><td></td></tr><tr><td>(Si<sub>2.87</sub>Al<sub>1.13</sub>)(Al<sub>1.45</sub>Mg<sub>0.79</sub>Fe<sup>2+</sup><sub>2.82</sub>Fe<sup>3+</sup><sub>0.12</sub>Mn<sup>2+</sup><sub>0.59</sub>)</td><td>12</td><td>0.712</td><td>9.350</td><td></td><td></td></tr><tr><td>(Si<sub>2.55</sub>Al<sub>1.45</sub>)(Al<sub>1.41</sub>Mg<sub>0.78</sub>Fe<sup>2+</sup><sub>3.88</sub>)</td><td>13</td><td>0.716</td><td>9.336</td><td></td><td></td></tr><tr><td>(Si<sub>2.85</sub>Al<sub>1.15</sub>)(Al<sub>0.97</sub>Mg<sub>4.54</sub>Fe<sup>2+</sup><sub>0.28</sub>Fe<sup>3+</sup><sub>0.18</sub>Mn<sup>2+</sup><sub>0.01</sub>)</td><td>14</td><td>0.691</td><td>9.234</td><td></td><td></td></tr><tr><td>(Si<sub>3.16</sub>Al<sub>0.84</sub>)(Al<sub>0.82</sub>Mg<sub>4.9</sub>Fe<sup>2+</sup><sub>0.29</sub>Mn<sup>2+</sup><sub>0.005</sub>)</td><td>15</td><td>0.698</td><td>9.232</td><td>structure refinement parameters: Bailey (1991c)</td><td></td></tr><tr><td>(Si<sub>3.22</sub>Al<sub>0.78</sub>)(Al<sub>0.65</sub>Mg<sub>5.04</sub>Fe<sup>2+</sup><sub>0.1</sub>Fe<sup>3+</sup><sub>0.17</sub>Mn<sup>2+</sup><sub>0.01</sub>)</td><td>16</td><td>0.699</td><td>9.216</td><td></td><td></td></tr><tr><td>(Si<sub>3.01</sub>Al<sub>0.99</sub>)(Al<sub>0.92</sub>Mg<sub>4.75</sub>Fe<sup>2+</sup><sub>0.13</sub>Fe<sup>3+</sup><sub>0.14</sub>)</td><td>17</td><td>0.691</td><td>9.216</td><td></td><td></td></tr><tr><td>(Si<sub>2.64</sub>Al<sub>1.36</sub>)(Al<sub>1.17</sub>Mg<sub>4.02</sub>Fe<sup>2+</sup><sub>0.65</sub>Fe<sup>3+</sup><sub>0.13</sub>Mn<sup>2+</sup><sub>0.02</sub>)</td><td>18</td><td>0.689</td><td>9.240</td><td></td><td></td></tr><tr><td>(Si<sub>2.69</sub>Al<sub>1.31</sub>)(Al<sub>1.42</sub>Mg<sub>2.36</sub>Fe<sup>2+</sup><sub>1.72</sub>Fe<sup>3+</sup><sub>0.26</sub>Mn<sup>2+</sup><sub>0.05</sub>)</td><td>19</td><td>0.690</td><td>9.258</td><td></td><td></td></tr></tbody></table>
<table>
  <tbody>
    <tr>
      <td>(Si<sub>2.6</sub>Al<sub>1.4</sub>)(Al<sub>1.23</sub>Mg<sub>2.16</sub>Fe<sup>2+</sup><sub>2.11</sub>Fe<sup>3+</sup><sub>0.3</sub>Mn<sup>2+</sup><sub>0.04</sub>)</td>
      <td>20</td>
      <td>0.700</td>
      <td>9.306</td>
    </tr>
    <tr>
      <td>(Si<sub>2.51</sub>Al<sub>1.49</sub>)(Al<sub>1.04</sub>Mg<sub>0.37</sub>Fe<sup>2+</sup><sub>3.57</sub>Fe<sup>3+</sup><sub>0.79</sub>Mn<sup>2+</sup><sub>0.01</sub>)</td>
      <td>21</td>
      <td>0.714</td>
      <td>9.354</td>
    </tr>
    <tr>
      <td>(Si<sub>2.96</sub>Al<sub>1.04</sub>)(Al<sub>0.95</sub>Mg<sub>4.62</sub>Fe<sup>2+</sup><sub>0.14</sub>Fe<sup>3+</sup><sub>0.14</sub>Cr<sub>0.09</sub>Ni<sub>0.007</sub>)</td>
      <td>22</td>
      <td>0.689</td>
      <td>9.207</td>
    </tr>
    <tr>
      <td>(Si<sub>3.07</sub>Al<sub>0.93</sub>)(Al<sub>0.63</sub>Mg<sub>4.95</sub>Fe<sup>2+</sup><sub>0.11</sub>Fe<sup>3+</sup><sub>0.03</sub>Cr<sub>0.26</sub>Ni<sub>0.007</sub>)</td>
      <td>23</td>
      <td>0.697</td>
      <td>9.220</td>
    </tr>
    <tr>
      <td>(Si<sub>3.19</sub>Al<sub>0.81</sub>)(Al<sub>0.2</sub>Mg<sub>5.18</sub>Fe<sup>2+</sup><sub>0.11</sub>Fe<sup>3+</sup><sub>0.04</sub>Cr<sub>0.51</sub>)</td>
      <td>24</td>
      <td>0.706</td>
      <td>9.231</td>
    </tr>
    <tr>
      <td>(Si<sub>3.11</sub>Al<sub>0.89</sub>)(Al<sub>0.19</sub>Mg<sub>5.1</sub>Fe<sup>2+</sup><sub>0.16</sub>Cr<sub>0.60</sub>)</td>
      <td>25</td>
      <td>0.705</td>
      <td>9.215</td>
    </tr>
    <tr>
      <td>(Si<sub>2.91</sub>Al<sub>1.09</sub>)(Al<sub>0.36</sub>Mg<sub>5.03</sub>Fe<sup>2+</sup><sub>0.23</sub>Fe<sup>3+</sup><sub>0.11</sub>Cr<sub>0.27</sub>Ni<sub>0.02</sub>)</td>
      <td>26</td>
      <td>0.705</td>
      <td>9.219</td>
    </tr>
    <tr>
      <td>(Si<sub>2.83</sub>Al<sub>1.17</sub>)(Al<sub>1.26</sub>Mg<sub>4.06</sub>Fe<sup>2+</sup><sub>0.42</sub>Fe<sup>3+</sup><sub>0.15</sub>)</td>
      <td>27</td>
      <td>0.683</td>
      <td>9.192</td>
    </tr>
    <tr>
      <td>(Si<sub>2.88</sub>Al<sub>1.12</sub>)(Al<sub>1.0</sub>Mg<sub>4.56</sub>Fe<sup>2+</sup><sub>0.16</sub>Fe<sup>3+</sup><sub>0.22</sub>Ni<sub>0.01</sub>)</td>
      <td>28</td>
      <td>0.688</td>
      <td>9.222</td>
    </tr>
    <tr>
      <td>(Si<sub>3.55</sub>Al<sub>0.45</sub>)(Al<sub>0.97</sub>Mg<sub>4.2</sub>Fe<sup>2+</sup><sub>0.06</sub>Fe<sup>3+</sup><sub>0.2</sub>Ni<sub>0.22</sub>)</td>
      <td>29</td>
      <td>0.685</td>
      <td>9.192</td>
    </tr>
    <tr>
      <td>(Si<sub>3.0</sub>Al<sub>1.0</sub>)(Al<sub>0.2</sub>Mg<sub>5.0</sub>Fe<sup>2+</sup><sub>0.1</sub>Cr<sub>0.7</sub>)</td>
      <td>30</td>
      <td>0.703</td>
      <td>9.240</td>
    </tr>
    <tr>
      <td>(Si<sub>3.21</sub>Al<sub>0.79</sub>)(Al<sub>0.56</sub>Mg<sub>4.72</sub>Fe<sup>2+</sup><sub>0.10</sub>Cr<sub>0.47</sub>Mn<sup>2+</sup><sub>0.001</sub>Ni<sub>0.03</sub>)</td>
      <td>31</td>
      <td>0.695</td>
      <td>9.170</td>
    </tr>
    <tr>
      <td>(Si<sub>3.0</sub>Al<sub>1.0</sub>)(Al<sub>1.0</sub>Mg<sub>5.0</sub>)</td>
      <td>32</td>
      <td>0.689</td>
      <td>9.187</td>
    </tr>
    <tr>
      <td>(Si<sub>3.17</sub>Al<sub>0.83</sub>)(Al<sub>0.83</sub>Mg<sub>4.28</sub>Fe<sup>2+</sup><sub>0.20</sub>Fe<sup>3+</sup><sub>0.28</sub>Cr<sub>0.023</sub>Ni<sub>0.25</sub>)</td>
      <td>33</td>
      <td>0.691</td>
      <td>9.246</td>
    </tr>
    <tr>
      <td>(Si<sub>2.72</sub>Al<sub>1.28</sub>)(Al<sub>1.35</sub>Mg<sub>0.41</sub>Fe<sup>2+</sup><sub>3.42</sub>Fe<sup>3+</sup><sub>0.46</sub>Mn<sup>2+</sup><sub>0.015</sub>)</td>
      <td>34</td>
      <td>0.706</td>
      <td>9.306</td>
    </tr>
    <tr>
      <td>(Si<sub>2.54</sub>Al<sub>1.46</sub>)(Al<sub>0.84</sub>Mg<sub>0.7</sub>Fe<sup>2+</sup><sub>2.51</sub>Fe<sup>3+</sup><sub>1.15</sub>Mn<sup>2+</sup><sub>0.53</sub>)</td>
      <td>35</td>
      <td>0.714</td>
      <td>9.350</td>
    </tr>
    <tr>
      <td>(Si<sub>3.28</sub>Al<sub>0.98</sub>)(Al<sub>0.72</sub>Mg<sub>4.95</sub>Fe<sup>2+</sup><sub>0.04</sub>Fe<sup>3+</sup><sub>0.04</sub>, Cr<sub>0.23</sub>Ni<sub>0.02</sub>)</td>
      <td>36</td>
      <td>0.694</td>
      <td>9.227</td>
    </tr>
    <tr>
      <td>(Si<sub>2.99</sub>Al<sub>1.01</sub>)(Al<sub>0.71</sub>Mg<sub>4.92</sub>Fe<sup>2+</sup><sub>0.06</sub>Fe<sup>3+</sup><sub>0.06</sub>Cr<sub>0.25</sub>)</td>
      <td>37</td>
      <td>0.694</td>
      <td>9.228</td>
    </tr>
    <tr>
      <td>(Si<sub>3.17</sub>Al<sub>0.83</sub>)(Al<sub>0.77</sub>Mg<sub>4.82</sub>Fe<sup>2+</sup><sub>0.17</sub>Fe<sup>3+</sup><sub>0.18</sub>)</td>
      <td>38</td>
      <td>0.695</td>
      <td>9.230</td>
    </tr>
    <tr>
      <td>(Si<sub>2.64</sub>Al<sub>1.36</sub>)(Al<sub>0.85</sub>Mg<sub>3.1</sub>Fe<sup>2+</sup><sub>1.82</sub>Fe<sup>3+</sup><sub>0.32</sub>)</td>
      <td>39</td>
      <td>0.708</td>
      <td>9.286</td>
    </tr>
    <tr>
      <td>(Si<sub>2.69</sub>Al<sub>1.31</sub>)(Al<sub>1.55</sub>Mg<sub>3.47</sub>Fe<sup>2+</sup><sub>0.86</sub>)</td>
      <td>40</td>
      <td>0.680</td>
      <td>9.241</td>
    </tr>
    <tr>
      <td>(Si<sub>2.87</sub>Al<sub>1.13</sub>)(Al<sub>0.79</sub>Mg<sub>4.6</sub>Fe<sup>2+</sup><sub>0.48</sub>Fe<sup>3+</sup><sub>0.21</sub>)</td>
      <td>41</td>
      <td>0.698</td>
      <td>9.236</td>
    </tr>
    <tr>
      <td>(Si<sub>2.62</sub>Al<sub>1.38</sub>)(Al<sub>1.32</sub>Mg<sub>2.85</sub>Fe<sup>2+</sup><sub>1.53</sub>Fe<sup>3+</sup><sub>0.22</sub>Cr<sub>0.002</sub>)</td>
      <td>42</td>
      <td>0.692</td>
      <td>9.267</td>
    </tr>
    <tr>
      <td>(Si<sub>3.55</sub>Al<sub>0.45</sub>)(Al<sub>1.17</sub>Mg<sub>0.76</sub>Fe<sup>2+</sup><sub>1.2</sub>Mn<sup>2+</sup><sub>0.01</sub>)</td>
      <td>43</td>
      <td>0.703</td>
      <td>9.257</td>
    </tr>
    <tr>
      <td>(Si<sub>2.84</sub>Al<sub>1.16</sub>)(Al<sub>0.95</sub>Mg<sub>0.79</sub>Fe<sup>2+</sup><sub>3.05</sub>Fe<sup>3+</sup><sub>0.65</sub>Mn<sup>2+</sup><sub>0.33</sub>)</td>
      <td>44</td>
      <td>0.719</td>
      <td>9.344</td>
    </tr>
    <tr>
      <td>(Si<sub>2.73</sub>Al<sub>1.27</sub>)(Al<sub>1.16</sub>Mg<sub>4.74</sub>Fe<sup>3+</sup><sub>0.07</sub>Mn<sup>2+</sup><sub>0.054</sub>)</td>
      <td>45</td>
      <td>0.685</td>
      <td>9.210</td>
    </tr>
    <tr>
      <td>(Si<sub>3.1</sub>Al<sub>0.9</sub>)(Al<sub>0.79</sub>Mg<sub>4.54</sub>Fe<sup>2+</sup><sub>0.55</sub>Fe<sup>3+</sup><sub>0.11</sub>Mn<sup>2+</sup><sub>0.01</sub>)</td>
      <td>46</td>
      <td>0.700</td>
      <td>9.240</td>
    </tr>
    <tr>
      <td>(Si<sub>2.69</sub>Al<sub>1.31</sub>)(Al<sub>1.13</sub>Mg<sub>2.86</sub>Fe<sup>2+</sup><sub>1.85</sub>Fe<sup>3+</sup><sub>0.14</sub>Mn<sup>2+</sup><sub>0.04</sub>)</td>
      <td>47</td>
      <td>0.703</td>
      <td>9.290</td>
    </tr>
    <tr>
      <td>(Si<sub>2.56</sub>Al<sub>1.44</sub>)(Al<sub>1.25</sub>Mg<sub>1.02</sub>Fe<sup>2+</sup><sub>3.49</sub>Fe<sup>3+</sup><sub>0.19</sub>Mn<sup>2+</sup><sub>0.05</sub>)</td>
      <td>48</td>
      <td>0.715</td>
      <td>9.350</td>
    </tr>
    <tr>
      <td>(Si<sub>2.43</sub>Al<sub>1.57</sub>)(Al<sub>1.54</sub>Mg<sub>0.2</sub>Fe<sup>2+</sup><sub>4.17</sub>Fe<sup>3+</sup><sub>0.03</sub>Mn<sup>2+</sup><sub>0.06</sub>)</td>
      <td>49</td>
      <td>0.715</td>
      <td>9.365</td>
    </tr>
  </tbody>
</table>

structure refinement parameters: Bailey (1991c)

structure refinement parameters: Bailey (1991c)

structure refinement: Rule & Bailey (1987)
<table>
  <tr>
    <td>(Si<sub>2.54</sub>Al<sub>1.46</sub>)(Al<sub>1.20</sub>Mg<sub>1.01</sub>Fe<sup>2+</sup><sub>3.24</sub>Fe<sup>3+</sup><sub>0.41</sub>Mn<sup>2+</sup><sub>0.053</sub>)</td>
    <td>50</td>
    <td>0.711</td>
    <td>9.348</td>
  </tr>
  <tr>
    <td>(Si<sub>2.73</sub>Al<sub>1.27</sub>)(Al<sub>1.15</sub>Mg<sub>4.74</sub>Fe<sup>3+</sup><sub>0.074</sub>Mn<sup>2+</sup><sub>0.055</sub>)</td>
    <td>51</td>
    <td>0.685</td>
    <td>9.208</td>
  </tr>
  <tr>
    <td>(Si<sub>2.54</sub>Al<sub>1.46</sub>)(Al<sub>1.20</sub>Mg<sub>1.01</sub>Fe<sup>2+</sup><sub>3.24</sub>Fe<sup>3+</sup><sub>0.41</sub>Mn<sup>2+</sup><sub>0.053</sub>)</td>
    <td>52</td>
    <td>0.711</td>
    <td>9.354</td>
  </tr>
  <tr>
    <td>(Si<sub>2.97</sub>Al<sub>1.03</sub>)(Al<sub>1.35</sub>Mg<sub>2.24</sub>Fe<sup>2+</sup><sub>1.44</sub>Fe<sup>3+</sup><sub>0.45</sub>Mn<sup>2+</sup><sub>0.031</sub>)</td>
    <td>53</td>
    <td>0.685</td>
    <td>9.282</td>
  </tr>
  <tr>
    <td>(Si<sub>3.17</sub>Al<sub>0.83</sub>)(Al<sub>0.89</sub>Mg<sub>3.16</sub>Fe<sup>2+</sup><sub>1.58</sub>Fe<sup>3+</sup><sub>0.20</sub>Mn<sup>2+</sup><sub>0.009</sub>)</td>
    <td>54</td>
    <td>0.706</td>
    <td>9.270</td>
  </tr>
  <tr>
    <td>(Si<sub>2.78</sub>Al<sub>1.22</sub>)(Al<sub>1.24</sub>Mg<sub>4.27</sub>Fe<sup>2+</sup><sub>0.29</sub>Fe<sup>3+</sup><sub>0.06</sub>)</td>
    <td>55</td>
    <td>0.683</td>
    <td>9.216</td>
  </tr>
  <tr>
    <td>(Si<sub>2.3</sub>Al<sub>1.7</sub>)(Al<sub>2.14</sub>Mg<sub>3.21</sub>Fe<sup>2+</sup><sub>0.06</sub>Fe<sup>3+</sup><sub>0.2</sub>)</td>
    <td>56</td>
    <td>0.647</td>
    <td>9.198</td>
  </tr>
  <tr>
    <td>(Si<sub>2.77</sub>Al<sub>1.23</sub>)(Al<sub>1.76</sub>Mg<sub>3.58</sub>Fe<sup>2+</sup><sub>0.29</sub>Fe<sup>3+</sup><sub>0.03</sub>Mn<sup>2+</sup><sub>0.02</sub>)</td>
    <td>57</td>
    <td>0.666</td>
    <td>9.216</td>
  </tr>
  <tr>
    <td>(Si<sub>2.7</sub>Al<sub>1.3</sub>)(Al<sub>1.3</sub>Mg<sub>1.3</sub>Fe<sup>2+</sup><sub>3.4</sub>)</td>
    <td>58</td>
    <td>0.714</td>
    <td>9.336</td>
  </tr>
  <tr>
    <td>(Si<sub>2.91</sub>Al<sub>1.09</sub>)(Al<sub>1.56</sub>Mg<sub>1.11</sub>Fe<sup>2+</sup><sub>3.04</sub>)</td>
    <td>59</td>
    <td>0.701</td>
    <td>9.314</td>
  </tr>
  <tr>
    <td>(Si<sub>2.64</sub>Al<sub>1.36</sub>)(Al<sub>1.76</sub>Mg<sub>0.82</sub>Fe<sup>2+</sup><sub>3.19</sub>)</td>
    <td>60</td>
    <td>0.697</td>
    <td>9.326</td>
  </tr>
  <tr>
    <td>(Si<sub>2.59</sub>Al<sub>1.41</sub>)(Al<sub>1.84</sub>Mg<sub>0.83</sub>Fe<sup>2+</sup><sub>3.006</sub>)</td>
    <td>61</td>
    <td>0.692</td>
    <td>9.324</td>
  </tr>
  <tr>
    <td>(Si<sub>2.67</sub>Al<sub>1.33</sub>)(Al<sub>1.73</sub>Mg<sub>0.79</sub>Fe<sup>2+</sup><sub>3.26</sub>)</td>
    <td>62</td>
    <td>0.698</td>
    <td>9.324</td>
  </tr>
  <tr>
    <td>(Si<sub>2.62</sub>Al<sub>1.38</sub>)(Al<sub>1.68</sub>Mg<sub>0.93</sub>Fe<sup>2+</sup><sub>3.23</sub>)</td>
    <td>63</td>
    <td>0.700</td>
    <td>9.319</td>
  </tr>
  <tr>
    <td>(Si<sub>2.61</sub>Al<sub>1.39</sub>)(Al<sub>1.72</sub>Mg<sub>1.19</sub>Fe<sup>2+</sup><sub>2.9</sub>Mn<sup>2+</sup><sub>0.02</sub>)</td>
    <td>64</td>
    <td>0.696</td>
    <td>9.311</td>
  </tr>
  <tr>
    <td>(Si<sub>2.5</sub>Al<sub>1.5</sub>)(Al<sub>0.6</sub>Mg<sub>5</sub>Fe<sup>2+</sup><sub>0.4</sub>)</td>
    <td>65</td>
    <td>0.706</td>
    <td>9.270</td>
  </tr>
  <tr>
    <td>(Si<sub>3.01</sub>Al<sub>0.99</sub>)(Al<sub>0.99</sub>Mg<sub>1.67</sub>Fe<sup>2+</sup><sub>0.5</sub>Fe<sup>3+</sup><sub>0.14</sub>Mn<sup>2+</sup><sub>0.005</sub>Ni<sub>2.62</sub>)</td>
    <td>66</td>
    <td>0.679</td>
    <td>9.214</td>
  </tr>
  <tr>
    <td>(Si<sub>2.26</sub>Al<sub>1.74</sub>)(Al<sub>1.33</sub>Mg<sub>4.42</sub>Fe<sup>3+</sup><sub>0.03</sub>Cr<sub>0.19</sub>)</td>
    <td>67</td>
    <td>0.675</td>
    <td>9.209</td>
  </tr>
  <tr>
    <td>(Si<sub>3.11</sub>Al<sub>0.89</sub>)(Al<sub>0.69</sub>Mg<sub>4.44</sub>Fe<sup>2+</sup><sub>0.2</sub>Fe<sup>3+</sup><sub>0.4</sub>Mn<sup>2+</sup><sub>0.01</sub>Ni<sub>0.01</sub>)</td>
    <td>68</td>
    <td>0.695</td>
    <td>9.245</td>
  </tr>
  <tr>
    <td>(Si<sub>2.88</sub>Al<sub>1.12</sub>)(Al<sub>0.75</sub>Mg<sub>4.47</sub>Fe<sup>3+</sup><sub>0.57</sub>)</td>
    <td>69</td>
    <td>0.689</td>
    <td>9.256</td>
  </tr>
  <tr>
    <td>(Si<sub>2.54</sub>Al<sub>1.46</sub>)(Al<sub>0.81</sub>Mg<sub>2.38</sub>Fe<sup>2+</sup><sub>0.9</sub>Fe<sup>3+</sup><sub>1.41</sub>Mn<sup>2+</sup><sub>0.09</sub>Ni<sub>0.01</sub>)</td>
    <td>70</td>
    <td>0.686</td>
    <td>9.264</td>
  </tr>
  <tr>
    <td>(Si<sub>3.01</sub>Al<sub>0.99</sub>)(Al<sub>1.0</sub>Mg<sub>4.12</sub>Fe<sup>2+</sup><sub>0.34</sub>Fe<sup>3+</sup><sub>0.3</sub>Mn<sup>2+</sup><sub>0.01</sub>)</td>
    <td>71</td>
    <td>0.688</td>
    <td>9.233</td>
  </tr>
  <tr>
    <td>(Si<sub>2.65</sub>Al<sub>1.35</sub>)(Al<sub>1.18</sub>Mg<sub>0.63</sub>Fe<sup>2+</sup><sub>3.19</sub>Fe<sup>3+</sup><sub>0.52</sub>Mn<sup>2+</sup><sub>0.09</sub>)</td>
    <td>72</td>
    <td>0.710</td>
    <td>9.362</td>
  </tr>
  <tr>
    <td>(Si<sub>2.4</sub>Al<sub>1.6</sub>)(Al<sub>1.14</sub>Mg<sub>4.59</sub>Fe<sup>3+</sup><sub>0.08</sub>Cr<sub>0.25</sub>)</td>
    <td>73</td>
    <td>0.680</td>
    <td>9.206</td>
  </tr>
  <tr>
    <td>(Si<sub>2.2</sub>Al<sub>1.8</sub>)(Al<sub>1.67</sub>Mg<sub>3.97</sub>Fe<sup>3+</sup><sub>0.17</sub>Cr<sub>0.12</sub>)</td>
    <td>74</td>
    <td>0.664</td>
    <td>9.192</td>
  </tr>
  <tr>
    <td>(Si<sub>3.53</sub>Al<sub>0.47</sub>)(Al<sub>0.47</sub>Mg<sub>4.74</sub>Fe<sup>2+</sup><sub>0.28</sub>Fe<sup>3+</sup><sub>0.29</sub>Mn<sup>2+</sup><sub>0.01</sub>Ni<sub>0.02</sub>)</td>
    <td>75</td>
    <td>0.704</td>
    <td>9.237</td>
  </tr>
  <tr>
    <td>(Si<sub>2.81</sub>Al<sub>1.19</sub>)(Al<sub>1.39</sub>Mg<sub>0.82</sub>Fe<sup>2+</sup><sub>3.69</sub>)</td>
    <td>76</td>
    <td>0.714</td>
    <td>9.231</td>
  </tr>
  <tr>
    <td>(Si<sub>3</sub>Al<sub>1</sub>)(Al<sub>0.96</sub>Mg<sub>3.93</sub>Fe<sup>2+</sup><sub>0.95</sub>Fe<sup>3+</sup><sub>0.1</sub>Mn<sup>2+</sup><sub>0.02</sub>)</td>
    <td>77</td>
    <td>0.699</td>
    <td>9.222</td>
  </tr>
  <tr>
    <td>(Si<sub>3.13</sub>Al<sub>0.87</sub>)(Al<sub>0.65</sub>Mg<sub>4.38</sub>Fe<sup>3+</sup><sub>0.54</sub>Mn<sup>2+</sup><sub>0.01</sub>)</td>
    <td>78</td>
    <td>0.691</td>
    <td>9.224</td>
  </tr>
  <tr>
    <td>(Si<sub>2.97</sub>Al<sub>1.03</sub>)(Al<sub>0.98</sub>Mg<sub>4.43</sub>Fe<sup>2+</sup><sub>0.17</sub>Fe<sup>3+</sup><sub>0.25</sub>Ni<sub>0.07</sub>)</td>
    <td>79</td>
    <td>0.687</td>
    <td>9.215</td>
  </tr>
</table>
<table><tr><td>(Si<sub>2.95</sub>Al<sub>1.05</sub>)(Al<sub>1.05</sub>Mg<sub>4.51</sub>Fe<sup>2+</sup><sub>0.14</sub>Fe<sup>3+</sup><sub>0.17</sub>Ni<sub>0.02</sub>)</td><td>80</td><td>0.686</td><td>9.228</td></tr><tr><td>(Si<sub>2.64</sub>Al<sub>1.36</sub>)(Al<sub>1.45</sub>Mg<sub>1.30</sub>Fe<sup>2+</sup><sub>3.12</sub>Mn<sup>2+</sup><sub>0.084</sub>)</td><td>81</td><td>0.708</td><td>9.336</td></tr><tr><td>(Si<sub>3.06</sub>Al<sub>0.94</sub>)(Al<sub>0.694</sub>Mg<sub>4.715</sub><sup>#</sup>Fe<sup>2+</sup><sub>0.109</sub>Fe<sup>3+</sup><sub>0.269</sub>Cr<sub>0.128</sub>Ni<sub>0.01</sub><br>1)</td><td>82</td><td>0.694</td><td>9.228</td></tr></table>

# instead of Mg<sub>4.175</sub> - corrected from the source paper
(Zheng & Bailey, 1989)

### Di-tri and di-dioctahedral chlorites

Wiewiora & Wilamowski (1996)

<table><tr><td>(Si<sub>2.86</sub>Al<sub>1.14</sub>)(Al<sub>2.98</sub>Mg<sub>1.95</sub>Fe<sup>2+</sup><sub>0.14</sub>Fe<sup>3+</sup><sub>0.08</sub>)</td><td>1</td><td>0.613</td><td>9.058</td></tr><tr><td>(Si<sub>3.14</sub>Al<sub>0.86</sub>)(Al<sub>4.1</sub>Mg<sub>0.08</sub>Fe<sup>2+</sup><sub>0.01</sub>Fe<sup>3+</sup><sub>0.04</sub>Li<sub>0.26</sub>)</td><td>2</td><td>0.553</td><td>8.956</td></tr><tr><td>(Si<sub>3.06</sub>Al<sub>0.94</sub>)(Al<sub>2.45</sub>Mg<sub>2.54</sub>Fe<sup>2+</sup><sub>0.01</sub>Fe<sup>3+</sup><sub>0.03</sub>)</td><td>3</td><td>0.630</td><td>9.060</td></tr><tr><td>(Si<sub>3.3</sub>Al<sub>0.7</sub>)(Al<sub>2.7</sub>Mg<sub>2.3</sub>)</td><td>4</td><td>0.620</td><td>9.014</td></tr><tr><td>(Si<sub>3.06</sub>Al<sub>0.94</sub>)(Al<sub>0.28</sub>Mg<sub>4.56</sub>Fe<sup>2+</sup><sub>0.06</sub>Fe<sup>3+</sup><sub>0.013</sub>Cr<sub>0.46</sub>Mn<sup>2+</sup><sub>0.001</sub><br>Ni<sub>0.03</sub>)</td><td>5</td><td>0.702</td><td>9.216</td></tr><tr><td>(Si<sub>2.48</sub>Al<sub>1.52</sub>)(Al<sub>1.52</sub>Mg<sub>0.32</sub>Fe<sup>2+</sup><sub>3.46</sub>Fe<sup>3+</sup><sub>0.04</sub>)</td><td>6</td><td>0.706</td><td>9.314</td></tr><tr><td>(Si<sub>2.86</sub>Al<sub>1.14</sub>)(Al<sub>2.9</sub>Mg<sub>1.96</sub>Fe<sup>2+</sup><sub>0.22</sub>)</td><td>7</td><td>0.617</td><td>9.054</td></tr><tr><td>(Si<sub>3.12</sub>Al<sub>0.88</sub>)(Al<sub>4.0</sub>Mg<sub>0.24</sub>)</td><td>8</td><td>0.545</td><td>8.940</td></tr><tr><td>(Si<sub>3.08</sub>Al<sub>0.92</sub>)(Al<sub>3.9</sub>Mg<sub>0.11</sub>Fe<sup>3+</sup><sub>0.015</sub>Cr<sub>0.02</sub>Mn<sup>2+</sup><sub>0.005</sub>Li<sub>0.82</sub>)</td><td>9</td><td>0.578</td><td>8.890</td></tr><tr><td>(Si<sub>3.04</sub>Al<sub>0.96</sub>)(Al<sub>3.8</sub>Mg<sub>0.14</sub>Fe<sup>3+</sup><sub>0.015</sub>Ni<sub>0.005</sub>Li<sub>1.13</sub>)</td><td>10</td><td>0.590</td><td>8.885</td></tr><tr><td>(Si<sub>3.3</sub>Al<sub>0.7</sub>)(Al<sub>2.7</sub>Mg<sub>2.3</sub>)</td><td>11</td><td>0.620</td><td>9.070</td></tr><tr><td>(Si<sub>3.01</sub>Al<sub>0.99</sub>)(Al<sub>2.84</sub>Mg<sub>1.91</sub>Fe<sup>2+</sup><sub>0.02</sub>Fe<sup>3+</sup><sub>0.19</sub>Mn<sup>2+</sup><sub>0.02</sub>)</td><td>12</td><td>0.612</td><td>9.080</td></tr><tr><td>(Si<sub>2.99</sub>Al<sub>1.01</sub>)(Al<sub>2.88</sub>Mg<sub>1.94</sub>Fe<sup>3+</sup><sub>0.17</sub>Mn<sup>2+</sup><sub>0.02</sub>)</td><td>13</td><td>0.612</td><td>9.083</td></tr><tr><td>(Si<sub>3.43</sub>Al<sub>0.57</sub>)(Al<sub>2.7</sub>Mg<sub>1.97</sub>Fe<sup>2+</sup><sub>0.04</sub>Fe<sup>3+</sup><sub>0.09</sub>)</td><td>14</td><td>0.615</td><td>9.042</td></tr><tr><td>(Si<sub>2.95</sub>Al<sub>1.05</sub>)(Al<sub>3.89</sub>Mg<sub>0.02</sub>Fe<sup>2+</sup><sub>0.05</sub>Li<sub>1.11</sub>)</td><td>15</td><td>0.587</td><td>8.930</td></tr><tr><td>(Si<sub>3.26</sub>Al<sub>0.74</sub>)(Al<sub>3.02</sub>Mg<sub>1.18</sub>Fe<sup>2+</sup><sub>0.033</sub>Fe<sup>3+</sup><sub>0.35</sub>Mn<sup>2+</sup><sub>0.004</sub>)</td><td>16</td><td>0.593</td><td>9.050</td></tr><tr><td>(Si<sub>2.88</sub>Al<sub>1.12</sub>)(Al<sub>2.35</sub>Mg<sub>2.91</sub>Fe<sup>3+</sup><sub>0.012</sub>)</td><td>17</td><td>0.637</td><td>9.190</td></tr><tr><td>(Si<sub>2.79</sub>Al<sub>1.21</sub>)(Al<sub>1.34</sub>Mg<sub>2.23</sub>Fe<sup>2+</sup><sub>0.29</sub>Fe<sup>3+</sup><sub>0.69</sub>)</td><td>18</td><td>0.658</td><td>9.180</td></tr><tr><td>(Si<sub>3.01</sub>Al<sub>0.99</sub>)(Al<sub>2.92</sub>Mg<sub>1.89</sub>Fe<sup>2+</sup><sub>0.12</sub>Fe<sup>3+</sup><sub>0.076</sub>Mn<sup>2+</sup><sub>0.024</sub>)</td><td>19</td><td>0.613</td><td>9.063</td></tr><tr><td>(Si<sub>3.0</sub>Al<sub>1.0</sub>)(Al<sub>2.83</sub>Mg<sub>2.0</sub>Fe<sup>3+</sup><sub>0.18</sub>Li<sub>0.015</sub>)</td><td>20</td><td>0.613</td><td>9.067</td></tr><tr><td>(Si<sub>3.3</sub>Al<sub>0.7</sub>)(Al<sub>2.86</sub>Mg<sub>1.92</sub>Fe<sup>2+</sup><sub>0.13</sub>)</td><td>21</td><td>0.614</td><td>9.090</td></tr><tr><td>(Si<sub>3.27</sub>Al<sub>0.73</sub>)(Al<sub>4.02</sub>Mg<sub>0.013</sub>Fe<sup>3+</sup><sub>0.003</sub>Li<sub>0.66</sub>)</td><td>22</td><td>0.567</td><td>8.929</td></tr><tr><td>(Si<sub>2.96</sub>Al<sub>1.04</sub>)(Al<sub>3.97</sub>Li<sub>1.11</sub>)</td><td>23</td><td>0.584</td><td>8.920</td></tr></table>

structure refinement parameters: Bailey (1991c)
<table><tr><td>(Si<sub>3.08</sub>Al<sub>0.92</sub>)(Al<sub>3.96</sub>Mg<sub>0.017</sub>Fe<sup>3+</sup><sub>0.007</sub>Li<sub>0.98</sub>)</td><td>24</td><td>0.580</td><td>8.957</td></tr><tr><td>(Si<sub>3.2</sub>Al<sub>0.8</sub>)(Al<sub>3.2</sub>Mg<sub>1.6</sub>)</td><td>25</td><td>0.597</td><td>9.054</td></tr><tr><td>(Si<sub>3.02</sub>Al<sub>0.98</sub>)(Al<sub>3.05</sub>Mg<sub>1.79</sub>Fe<sup>3+</sup><sub>0.06</sub>Mn<sup>2+</sup><sub>0.004</sub>)</td><td>26</td><td>0.604</td><td>9.054</td></tr><tr><td>(Si<sub>3.28</sub>Al<sub>0.72</sub>)(Al<sub>3.08</sub>Mg<sub>1.19</sub>Fe<sup>2+</sup><sub>0.033</sub>Fe<sup>3+</sup><sub>0.35</sub>)</td><td>27</td><td>0.592</td><td>9.054</td></tr><tr><td>(Si<sub>2.2</sub>Al<sub>1.8</sub>)(Al<sub>1.2</sub>Mg<sub>2.6</sub>Fe<sup>2+</sup><sub>0.3</sub>Fe<sup>3+</sup><sub>1.5</sub>)</td><td>28</td><td>0.663</td><td>9.300</td></tr><tr><td>(Si<sub>3.38</sub>Al<sub>0.62</sub>)(Al<sub>3.96</sub>Fe<sup>2+</sup><sub>0.04</sub>Fe<sup>3+</sup><sub>0.09</sub>Li<sub>0.7</sub>)</td><td>29</td><td>0.572</td><td>8.900</td></tr><tr><td>(Si<sub>2.36</sub>Al<sub>1.64</sub>)(Al<sub>3.14</sub>Mg<sub>1.8</sub>Fe<sup>3+</sup><sub>0.1</sub>Cr<sub>0.12</sub>)</td><td>30</td><td>0.604</td><td>9.207</td></tr><tr><td>(Si<sub>2.98</sub>Al<sub>1.02</sub>)(Al<sub>3.77</sub>Mg<sub>0.06</sub>Fe<sup>2+</sup><sub>0.12</sub>Fe<sup>3+</sup><sub>0.15</sub>Li<sub>1.27</sub>)</td><td>31</td><td>0.599</td><td>8.930</td></tr></table>

problem redox suspected (Steinfink, 1958)

Other chlorites

Radoslovich (1962)

<table><tr><td>(Si<sub>2.8</sub>Al<sub>1.2</sub>)(Al<sub>1.3</sub>Mg<sub>2.8</sub>Fe<sup>2+</sup><sub>1.7</sub>)</td><td>ripidolite</td><td>0.696</td><td>9.283</td></tr><tr><td>(Si<sub>2.6</sub>Al<sub>1.4</sub>)(Al<sub>1.5</sub>Mg<sub>0.4</sub>Fe<sup>2+</sup><sub>4.2</sub>)</td><td>bavalite</td><td>0.716</td><td>9.365</td></tr><tr><td>(Si<sub>2.5</sub>Al<sub>1.5</sub>)(Al<sub>1.2</sub>Mg<sub>2.2</sub>Fe<sup>2+</sup><sub>0.7</sub>Fe<sup>3+</sup><sub>1.4</sub>)</td><td>thuringite</td><td>0.668</td><td>9.192</td></tr><tr><td>(Si<sub>2.6</sub>Al<sub>1.4</sub>)(Al<sub>1.22</sub>Mg<sub>4.2</sub>Fe<sup>2+</sup><sub>0.22</sub>)</td><td>grochanite</td><td>0.682</td><td>9.227</td></tr><tr><td>(Si<sub>2.9</sub>Al<sub>1.1</sub>)(Al<sub>0.7</sub>Mg<sub>2.9</sub>Fe<sup>2+</sup><sub>2.2</sub>Fe<sup>3+</sup><sub>10.2</sub>)</td><td>diabantite</td><td>0.718</td><td>9.305</td></tr><tr><td>(Si<sub>3.1</sub>Al<sub>0.9</sub>)(Al<sub>0.2</sub>Mg<sub>5.1</sub>Fe<sup>2+</sup><sub>0.2</sub>Cr<sub>0.6</sub>)</td><td>kammererite</td><td>0.706</td><td>9.242</td></tr><tr><td>(Si<sub>2.5</sub>Al<sub>1.5</sub>)(Al<sub>1.6</sub>Mg<sub>4.3</sub>Fe<sup>2+</sup><sub>0.1</sub>)</td><td>sheridanite</td><td>0.672</td><td>9.226</td></tr><tr><td>(Si<sub>2.88</sub>Al<sub>1.12</sub>)(Al<sub>1.21</sub>Mg<sub>1.84</sub>Fe<sup>2+</sup><sub>2.82</sub>)</td><td>Mg-chamosite</td><td>0.711</td><td>9.33</td></tr><tr><td>(Si<sub>2.62</sub>Al<sub>1.38</sub>)(Al<sub>1.18</sub>Mg<sub>0.25</sub>Fe<sup>3+</sup><sub>0.37</sub>Mn<sub>3.82</sub>)</td><td>pennantite</td><td>0.751</td><td>9.40</td></tr><tr><td>(Si<sub>2.4</sub>Al<sub>1.6</sub>)(Al<sub>0.85</sub>Mg<sub>0.7</sub>Fe<sup>2+</sup><sub>3.7</sub>Fe<sup>3+</sup><sub>0.75</sub>)</td><td>thuringite</td><td>0.721</td><td>9.30</td></tr><tr><td>(Si<sub>2.7</sub>Al<sub>1.3</sub>)(Al<sub>1.4</sub>Fe<sup>2+</sup><sub>3.85</sub>Fe<sup>3+</sup><sub>0.75</sub>)</td><td>thuringite</td><td>0.706</td><td>9.31</td></tr><tr><td>(Si<sub>2.25</sub>Al<sub>1.75</sub>)(Al<sub>0.8</sub>Mg<sub>0.35</sub>Fe<sup>2+</sup><sub>4.75</sub>Fe<sup>3+</sup><sub>0.05</sub>)</td><td>bavalite</td><td>0.742</td><td>9.35</td></tr><tr><td>(Si<sub>2.71</sub>Al<sub>1.29</sub>)(Al<sub>1.35</sub>Mg<sub>0.92</sub>Fe<sup>2+</sup><sub>3.37</sub>Fe<sup>3+</sup><sub>0.18</sub>Mn<sub>0.04</sub>)</td><td>daphnite</td><td>0.710</td><td>9.38</td></tr><tr><td>(Si<sub>2.99</sub>Al<sub>1.01</sub>)(Al<sub>1.12</sub>Mg<sub>0.75</sub>Fe<sup>2+</sup><sub>3.23</sub>Fe<sup>3+</sup><sub>0.56</sub>)</td><td>chamosite</td><td>0.710</td><td>9.36</td></tr><tr><td>(Si<sub>2.42</sub>Al<sub>1.58</sub>)(Al<sub>0.83</sub>Mg<sub>0.72</sub>Fe<sup>2+</sup><sub>3.68</sub>Fe<sup>3+</sup><sub>0.76</sub>)</td><td>thuringite</td><td>0.722</td><td>9.32</td></tr><tr><td>(Si<sub>2.6</sub>Al<sub>1.4</sub>)(Al<sub>0.75</sub>Mg<sub>4.9</sub>Fe<sup>2+</sup><sub>0.07</sub>Fe<sup>3+</sup><sub>0.17</sub>Cr<sub>0.18</sub>)</td><td>corundophillite</td><td>0.693</td><td>9.27</td></tr><tr><td>(Si<sub>3.1</sub>Al<sub>0.9</sub>)(Al<sub>1.3</sub>Mg<sub>0.75</sub>Fe<sup>2+</sup><sub>3.35</sub>Fe<sup>3+</sup><sub>0.6</sub>)</td><td>chamosite</td><td>0.706</td><td>9.36</td></tr><tr><td>(Si<sub>2.9</sub>Al<sub>1.1</sub>)(Al<sub>0.82</sub>Mg<sub>5.20</sub>)</td><td>leuchtenbergitte</td><td>0.695</td><td>9.19</td></tr></table>
<table><tr><td>(Si<sub>2.6</sub>Al<sub>1.4</sub>)(Al<sub>1.30</sub>Mg<sub>4.6</sub>Fe<sup>2+</sup><sub>0.02</sub>Fe<sup>3+</sup><sub>0.10</sub>)</td><td>sheridanite</td><td>0.679</td><td>9.21</td></tr><tr><td>(Si<sub>2.6</sub>Al<sub>1.4</sub>)(Al<sub>1.40</sub>Mg<sub>3.9</sub>Fe<sup>2+</sup><sub>0.70</sub>)</td><td>chlorite</td><td>0.684</td><td>9.21</td></tr><tr><td>(Si<sub>2.42</sub>Al<sub>1.58</sub>)(Al<sub>1.01</sub>Mg<sub>2.7</sub>Fe<sup>2+</sup><sub>2.3</sub>)</td><td>prochlorite</td><td>0.712</td><td>9.21</td></tr><tr><td>(Si<sub>3.03</sub>Al<sub>0.97</sub>)(Al<sub>0.17</sub>Mg<sub>5.05</sub>Fe<sup>2+</sup><sub>0.11</sub>Fe<sup>3+</sup><sub>0.04</sub>Cr<sub>0.71</sub>)</td><td>Chrome<br>chlorite</td><td>0.703</td><td>9.25</td></tr></table>

IIb-4 triclinic clinochlore
(Si<sub>2.96</sub>Al<sub>1.04</sub>)(Al<sub>0.841</sub>Mg<sub>2.924</sub>Fe<sup>2+</sup><sub>0.076</sub>Fe<sup>3+</sup><sub>0.102</sub>Cr<sub>0.004</sub>Ti<sub>0.004</sub>)
NMNH
#R4513

Smyth *et al.* (1997)

Cookeite
(Si<sub>3.042</sub>Al<sub>0.958</sub>)(Al<sub>4.017</sub>Mg<sub>0.007</sub>Fe<sub>0.009</sub>Cr<sub>0.005</sub>Li<sub>0.852</sub>)
Little Rock

Zheng & Bailey (1997)

two-layer «r» structure

Vanadium chlorite
(Si<sub>3.54</sub>Al<sub>0.46</sub>)(Al<sub>2.02</sub>Mg<sub>1.14</sub>Fe<sup>3+</sup><sub>0.48</sub>V<sub>0.4</sub>Li<sub>0.04</sub>)
TM05
0.612
9.120
(Si<sub>3.59</sub>Al<sub>0.41</sub>)(Al<sub>1.96</sub>Mg<sub>1.01</sub>Fe<sup>3+</sup><sub>0.5</sub>V<sub>0.48</sub>Li<sub>0.05</sub>)
TM6
0.611
9.120

Whitney & Northrop (1986)

Fe<sup>3+</sup>-sudoites
(Si<sub>3.32</sub>Al<sub>0.68</sub>)(Al<sub>2.93</sub>Mg<sub>1.58</sub>Fe<sup>2+</sup><sub>0.13</sub>Fe<sup>3+</sup><sub>0.15</sub>)
MR2
0.606
9.054
(Si<sub>3.42</sub>Al<sub>0.58</sub>)(Al<sub>2.87</sub>Mg<sub>1.24</sub>Fe<sup>2+</sup><sub>0.24</sub>Fe<sup>3+</sup><sub>0.33</sub>Mn<sub>0.01</sub>)
MR11
0.605
9.066

Billault *et al.* (2002)
<table><caption>Table 9. Summary of tetrahedral parameters of chlorite. *Sample reference from Table 8. Tetrahedral rotation angle α<sub>ref</sub>: measured by structure refinement, α<sub>calc</sub>: calculated (α = arccos(b/b<sub>tet.</sub>) (Eq. 4) – see text). #: from structure refinement. £: calculated using the following equation derived from Eq. 3: (Si-O) = (b<sub>tet.</sub>·√2.<sup>IV</sup>Al.Δ)/(4.√2) with b<sub>tet.</sub> value obtained from Eq. 4 with the α<sub>ref</sub> value, and Δ = 0.13 being the difference between Si-O and Al-O bond lengths.</caption><thead><tr><th>Sample*</th><th>α<sub>ref</sub></th><th>α<sub>calc</sub></th><th colspan="3">Mean bond length (Å)</th></tr><tr><th>Trioctahedral</th><th>IVAl</th><th>(°)</th><th>T-O#</th><th>Si-O<sup>£</sup></th><th>Al-O<sup>£</sup></th></tr></thead><tbody><tr><td>42 - clinochlore IIb-2</td><td>1.378</td><td>8.5</td><td>9.9</td><td>1.668</td><td>1.742</td></tr><tr><td>37 - clinochlore IIb-4</td><td>1.010</td><td>7.2</td><td>8.8</td><td>1.659</td><td>1.741</td></tr><tr><td>36 - clinochlore IIb-4</td><td>0.980</td><td>7.2</td><td>8.6</td><td>1.653</td><td>1.742</td></tr><tr><td>82 - clinochlore IIb-4</td><td>0.944</td><td>6.9</td><td>8.3</td><td>1.652</td><td>1.743</td></tr><tr><td>82 - clinochlore IIb-2</td><td>0.944</td><td>6.8</td><td>8.3</td><td>1.653</td><td>1.742</td></tr><tr><td>15 - clinochlore IIb-4</td><td>0.840</td><td>6.5</td><td>7.3</td><td>1.651</td><td>1.745</td></tr><tr><td>Dioctahedral</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Cookeite - Iaa</td><td>0.958</td><td>14</td><td>16.6</td><td>1.657 (x3)</td><td>1.685</td></tr><tr><td>2 - donbassite Ia-2</td><td>0.860</td><td>13.5</td><td>15.9</td><td>1.675</td><td>1.617</td></tr></tbody></table>
<table><caption>Table 10. Regression parameters proposed for the different mineral families investigated. R calculated with r(Li⁺) = 0.6 Å</caption><thead><tr><th>Regression type</th><th>b = A.R + B</th><th>b/b<sub>tet.</sub> = C.R + D</th><th>%O enlargement# = E.R + F</th></tr></thead><tbody><tr><td><strong>Hydroxides</strong></td><td>b = 4.51.R + 6.22</td><td></td><td></td></tr><tr><td><strong>MO(OH) oxyhydroxides</strong></td><td>b = 4.6673.R + 6.0546</td><td></td><td></td></tr><tr><td><strong>Layered double hydroxides</strong></td><td>b = 4.2043.R + 6.3758</td><td></td><td></td></tr><tr><td><strong>TO phyllosilicates</strong></td><td></td><td></td><td></td></tr><tr><td>kaolinite-lizardite (K-L)</td><td>b = 1.5092.R + 8.1371</td><td>b/b<sub>tet.</sub> = 0.1649.R + 0.889</td><td>%O enlargement = -33.489.R + 21.497</td></tr><tr><td>greenalite-caryopilite (G-C)</td><td>b = 6.8545.R + 4.3037</td><td>b/b<sub>tet.</sub> = 0.7489.R + 0.47</td><td></td></tr><tr><td>Al-serpentines (G-C)'</td><td></td><td>b/b<sub>tet.</sub> = 0.7489.R + 0.47</td><td></td></tr><tr><td>Fe<sup>3+</sup>-serpentines (Fe<sup>3+</sup>-Serp)'</td><td></td><td>b/b<sub>tet.</sub> = 0.7489.R + 0.43</td><td></td></tr><tr><td><strong>Neutral TOT phyllosilicates</strong></td><td></td><td></td><td></td></tr><tr><td>Pyrophyllite-talc (P-T)</td><td>b = 1.1162.R + 8.3691</td><td>b/b<sub>tet.</sub> = 0.122.R + 0.9144</td><td>%O enlargement = -38.126.R + 24.21</td></tr><tr><td><strong>Mica TOT phyllosilicates*</strong></td><td></td><td></td><td></td></tr><tr><td>muscovite-phlogopite (M-Ph)</td><td>b = 1.1479.R + 8.3794</td><td>b/b<sub>tet.</sub> = 0.1229.R + 0.8975</td><td>%O enlargement = -37.514.R + 24.23</td></tr><tr><td>phlogopite-annite (Ph-A)</td><td>b = 2.3942.R + 7.4821</td><td>b/b<sub>tet.</sub> = 0.2564.R + 0.8014</td><td>%O enlargement = -20.056.R + 11.66</td></tr><tr><td>Tetrasilicic micas</td><td>b = 0.8694.R + 8.4637</td><td>b/b<sub>tet.</sub> = 0.0944.R + 0.925</td><td>%O enlargement = -39.421.R + 24.328</td></tr><tr><td>Phengites<sup>S</sup> – micaceous samples<sup>F</sup></td><td></td><td>b/b<sub>tet.</sub> = 0.2373.R + 0.8376<sup>S</sup></td><td>%O enlargement = -46.185.R + 28.869<sup>F</sup></td></tr><tr><td><strong>Chlorite TOTO phyllosilicates</strong></td><td>b = 2.2995.R + 7.6655</td><td>b/b<sub>tet.</sub> = 0.1991.R + 0.8504</td><td>%O enlargement = -24.452.R + 16.031</td></tr></tbody><tfoot><tr><td colspan="4">*See Table 7 for details on sub-relationships</td></tr><tr><td colspan="4">#compared to hydroxides</td></tr></tfoot></table>
<table><caption>Table 11. Structural details for some phyllosilicates for comparison. Sample reference from Table 6 for micas, and table 4 for talc. R calculated with r(Li⁺)= 0.60 Å. Tetrahedral rotation angle α<sub>ref</sub>: measured by structure refinement, α<sub>calc</sub>: calculated (α = arccos(b/ b<sub>tet</sub>) (Eq. 4) – see text). %O enlargement compared to hydroxides; O sheet thickness measured by structure refinement and α<sub>ref</sub>: from Brigatti & Guggenheim (2002) for micas, and Drits et al. (2012) for talc.</caption><thead><tr><th></th><th>sample</th><th>R (Å)</th><th>b (Å)</th><th>α<sub>ref</sub> (°)</th><th>α<sub>calc</sub> (°)</th><th>%O enlargement</th><th>O sheet thickness (Å)</th></tr></thead><tbody><tr><td>Si<sub>3</sub>Al K-mica</td><td>5 - muscovite</td><td>0.581</td><td>9.074</td><td>7.7</td><td>12.1</td><td>2.7</td><td>2.107</td></tr><tr><td>Si<sub>3</sub>Al Cs-mica</td><td>49 - nanpingite</td><td>0.577</td><td>9.076</td><td>5.7</td><td>12.8</td><td>2.9</td><td>2.079</td></tr><tr><td>Si<sub>4</sub> K-mica</td><td>96 - polylithionite</td><td>0.578</td><td>8.968</td><td>3.0</td><td>11.5</td><td>1.6</td><td>2.095</td></tr><tr><td>Si<sub>3</sub>Al K-mica</td><td>85 - ferrian phlogopite</td><td>0.677</td><td>9.210</td><td>7.3</td><td>10.5</td><td>-0.7</td><td>2.112</td></tr><tr><td>Si<sub>3</sub>Al K-mica</td><td>137 - ferrian phlogopite</td><td>0.685</td><td>9.212</td><td>7.4</td><td>10.4</td><td>-1.0</td><td>2.113</td></tr><tr><td>Si<sub>3</sub>Al K-mica</td><td>146 - lithian siderophyllite</td><td>0.677</td><td>9.195</td><td>4.1</td><td>10.2</td><td>-0.8</td><td>2.109</td></tr><tr><td>Si<sub>4</sub> K-mica</td><td>105 - tainiolite</td><td>0.680</td><td>9.065</td><td>1.1</td><td>7.9</td><td>-2.4</td><td>2.192</td></tr><tr><td>Si<sub>4</sub> K-mica</td><td>3 - celadonite</td><td>0.682</td><td>9.050</td><td>1.3</td><td>9.0</td><td>-2.6</td><td>2.249</td></tr><tr><td>Si<sub>3</sub>Al K-mica</td><td>98 - fluoro phlogopite</td><td>0.720</td><td>9.238</td><td>7.6</td><td>10.1</td><td>-2.9</td><td>2.138</td></tr><tr><td>Si<sub>4</sub> K-mica</td><td>104 - tetra-silicic-F phlogopite</td><td>0.720</td><td>9.086</td><td>1.4</td><td>6.9</td><td>-4.0</td><td>2.186</td></tr><tr><td>Talc</td><td></td><td>0.720</td><td>9.173</td><td>3.6</td><td>0</td><td>-3.1</td><td>2.168</td></tr></tbody></table>