## 3 Results
### Silicate Pigments
\begin{table}
\begin{tabular}{c c c c c} \hline \multirow{2}{*}{**Pigment**} & \multicolumn{2}{c}{**ATR-FTIR**} & \multicolumn{2}{c}{**DRIFT**} \\ \cline{2-5}  & **Wavenumber (cm\({}^{-1}\))** & **Assignment 1** & **Wavenumber (cm\({}^{-1}\))** & **Assignment 1** \\ \hline \hline \multirow{7}{*}{EGB-S} & \multicolumn{4}{c}{2042, 1930, 1820} & \multicolumn{2}{c}{v+\(\delta\)(Si–O), cuprorivaite [14]} \\ \cline{2-5}  & & & 1735 & \(\
u_{\mathrm{s}}\)+\(\delta\)(CO\({}_{3}\)\({}^{2-}\)), calcite [26] \\ \cline{2-5}  & \multicolumn{2}{c}{1647} & \multicolumn{2}{c}{-OH [26]} \\ \cline{2-5}  & 1490 & CO\({}_{3}\)\({}^{2-}\), calcite [26] & 1353 & \(\
u_{\mathrm{as}}\)(CO\({}_{3}\)\({}^{2-}\)), calcite [26] \\ \cline{2-5}  & 1227, 1158, 1049, 997 & \(\
u_{\mathrm{as}}\)(Si–O), cuprorivaite [30; 31] & 1264, 1175, 1057, 662 & \(\
u_{\mathrm{s}}\)(Si–O), cuprorivaite [32; 33] \\ \cline{2-5}  & 802 & \(\
u_{\mathrm{s}}\)(Si–O), quartz [8; 34] & \(\begin{array}{c}775, 711, 684\\ (Reststrahlen)\end{array}\) & Si–O, quartz [29; 35] \\ \cline{2-5}  & 756, 665 & \(\
u_{\mathrm{s}}\)(Si–O), cuprorivaite [30; 31] & & \\ \hline \hline \multirow{7}{*}{UL-N} & 3600-3000 & \multicolumn{2}{c}{-OH [26], muscovite (7)} & 3800-3000 & \multicolumn{2}{c}{-OH [26], muscovite (7)} \\ \cline{2-5}  & 2911, 2859, 2639 & \(\
u\)(–CH), organic matter [26] & 2607, 2172, 2093, 1850, 1731 & \(\
u\)(–CH), organic matter [26] \\ \cline{2-5}  & 1647 & \multicolumn{2}{c}{-OH [26]} & 1688 & \multicolumn{2}{c}{-OH [26]} \\ \cline{2-5}  & 1430 & CO\({}_{3}\)\({}^{2-}\) [26], calcite (7) & 1435 & CO\({}_{3}\)\({}^{2-}\) [26], calcite (7) \\ \cline{2-5}  & 1255 & \(\
u\)(–O–C), calcite [26] & & \\ \cline{2-5}  & 1157, 1054 & SiO\({}_{3}\)\({}^{2-}\), silicate [26] & 1234, 1030 (Reststrahlen) & \(\
u_{\mathrm{as}}\)(Si–O or Si,Al–O), lazurite [15; 36; 37] \\ \cline{2-5}  & 965 & Si,Al–O, sodalite [38; 39] & 970 & \(\
u_{\mathrm{as}}\)(Si–O), sodalite [10] \\ \cline{2-5}  & 750 & Al–O–Si, muscovite [40] & 752, 728 & Al–O–Si, muscovite (7) \\ \cline{2-5}  & 700 & \(\
u_{\mathrm{as}}\)(Si,Al–O), lazurite [9; 41] & & \\ \cline{2-5}  & 664 & \multicolumn{2}{c}{-SO\({}_{4}\)\({}^{2-}\), lazurite [41]} & 667 & \multicolumn{2}{c}{-SO\({}_{4}\)\({}^{2-}\), lazurite [15]} \\ \hline \hline \multirow{7}{*}{UL-S} & 3690, 3621 & \(\delta\)(–OH), kaolinite [42] & 3805–3700 & \multicolumn{2}{c}{-OH, kaolinite [35]} \\ \cline{2-5}  & & 1920 & CO\({}_{3}\)\({}^{2-}\), carbonate [26] \\ \cline{2-5}  & 1648 & \multicolumn{2}{c}{-OH [26]} & 1684 & \multicolumn{2}{c}{–OH [26]} \\ \cline{2-5}  & 1240, 1160 & SiO\({}_{3}\)\({}^{2-}\), silicate [26] & 1280, 1240 & \(\
u_{\mathrm{as}}\)(Si–O) or \(\
u_{\mathrm{as}}\)(Si,Al–O), lazurite [36; 37] \\ \cline{2-5}  & 990 & Si,Al–O, sodalite [38; 39] & 1006, 940, 800 & Al–OH, kaolinite [35] \\ \cline{2-5}  & 800, 752, 692 & Al,Si–O, kaolinite [43] & 753, 735, 705 & Si–O, silicate [26] \\ \cline{2-5}  & 665 & \multicolumn{2}{c}{-SO\({}_{4}\)\({}^{2-}\), lazurite [41]} & 675 & \multicolumn{2}{c}{–SO\({}_{4}\)\({}^{2-}\), lazurite [15]} \\ \hline \hline \multirow{7}{*}{GE-N} & 3500-3100 & \multicolumn{2}{c}{v(-OH), aluminiosilicates [44]} & 3800-2900 & \multicolumn{2}{c}{-OH, aluminiosilicates [26]} \\ \cline{2-5}  & 1840 & \multicolumn{2}{c}{\(\
u_{\mathrm{s}}\)+\(\delta\)(CO\({}_{3}\)\({}^{2-}\)), calcite [14]} \\ \cline{2-5}  & 1632 & \multicolumn{2}{c}{-OH [26]} & 1695 & \multicolumn{2}{c}{–OH [26]} \\ \cline{2-5}  & & 1175-1150 & \multicolumn{2}{c}{Si–O [26], silicates} \\ \cline{2-5}  & 1425, 873 & \multicolumn{2}{c}{\(\
u_{\mathrm{as}}\)(CO\({}_{3}\)\({}^{2-}\)), calcite [8; 45]} & 1493, 1430 & CO\({}_{3}\)\({}^{2-}\), calcite [11; 35] \\ \cline{2-5}  & & 1065(Reststrahlen) & \multicolumn{2}{c}{v(Si–O), glauconite [15]} \\ \cline{2-5}  & 970, 724 & \multicolumn{2}{c}{Si–O, glauconite/celadonite [43; 46; 47]} & 960, 920 & Si,Al–O, kaolinite [26] \\ \cline{2-5}  & & & 777, 735 & Si–O [26], silicates \\ \cline{2-5}  & & 671 & \multicolumn{2}{c}{\(\delta\)(Si–O), glauconite [48]} \\ \hline \hline \end{tabular}
\end{table}