Mineralogical Magazine, October 2013, Vol. 77(7), pp. 2975–2988

Meisserite, Na5(UO2)(SO4)3(SO3OH)(H2O), a new uranyl
sulfate mineral from the Blue Lizard mine, San JuanCounty, Utah, USA
J. PLÁŠIL1,*, A. R. KAMPF2, A. V. KASATKIN3, J. MARTY4, R. ŠKODA5, S. SILVA6 AND J. ČEJKA7
1Institute of Physics ASCR, v.v.i., Na Slovance 2, CZ 182 21, Prague 8, Czech Republic
Mineral Sciences Department, Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los
Angeles, CA 90007, USA
3
V/O ‘‘Almazjuvelirexport’’, Ostozhenka Street, 22, block 1, 119034 Moscow, Russia
45199 East Silver Oak Road, Salt Lake City, UT 84108, USA
5
Department of Geological Sciences, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech
Republic
6
USGS, 345 Middlefield Road, MS 434, Menlo Park CA 94025, USA
7
Department of Mineralogy and Petrology, National Museum, Cirkusová 1740, CZ 193 00, Prague 9, Czech Republic
2[Received 2013; Accepted 2013; Associate Editor: NNN]
ABSTRACT

Meisserite (IMA2013-039), Na5(UO2)(SO4)3(SO3OH)(H2O), is a new uranyl sulfate mineral from theBlue Lizard mine, San Juan County, Utah (USA). It is named in honour of the prominent Swiss
mineralogist Nicolas Meisser. The new mineral was found in a sandstone matrix and is associated withchalcanthite, copiapite, ferrinatrite, gypsum, johannite and another new Na-bearing uranyl sulfate,belakovskiite (IMA2013-075). Meisserite is a secondary mineral formed by the post-mining
weathering of uraninite. The mineral is triclinic, P1̄, a = 5.32317(10), b = 11.5105(2), c =13.5562(10) Å, a = 102.864(7)º, b = 97.414(7)º, g = 91.461(6)º, V = 801.74(6) Å3, and Z = 2. Crystals
are prisms elongated on [100], up to 0.3 mm long, exhibiting the forms {010} and {001}. Meisserite ispale green to yellowish green, translucent to transparent and has a very pale yellow streak. It is brittle,
with fair cleavage on {100} and {001}, and uneven fracture. The Mohs hardness is estimated at 2.
Meisserite is somewhat hygroscopic and easily soluble in water. The calculated density based on theempirical formula is 3.208 g/cm3. Meisserite exhibits bright yellow green ﬂuorescence under both
long- and shortwave UV radiation. The mineral is optically biaxial (–), with a = 1.514(1), b = 1.546(1),g = 1.557(1) (measured in white light). The measured 2V is 60(2)º and the calculated 2V is 60º.
Dispersion is r > v, perceptible, and the optical orientation is X & a, Z & c*. The mineral is pleochroic,with X (colourless) < Y (pale yellow) & Z (pale greenish yellow). The empirical formula of meisserite(based on 19 O a.p.f.u.) is Na5.05(U0.94O2)(SO4)3[SO2.69(OH)1.31](H2O). The Raman spectrum is2
dominated by the symmetric stretching vibrations of UO2+
2 , SO4 and also weaker O H stretchingvibrations. The eight strongest powder X-ray diffraction lines are [dobs in Å (hkl) Irel]: 13.15 (001) 81,
6.33 (01̄2) 62, 5.64 (02̄1,020) 52, 5.24 (100,012,1̄01) 100, 4.67 (101) 68, 3.849 (1̄2̄1,102,022) 48, 3.614(03̄2,1̄1̄3) 41, and 3.293 (1̄13,004) 43. The crystal structure of meisserite (R1 = 0.018 for 3306
reﬂections with Iobs > 3sI) is topologically unique among known structures of uranyl minerals andinorganic compounds. It contains uranyl pentagonal bipyramids linked by SO4 groups to form chains.
Na+ cations bond to O atoms in the chains and to an SO3OH group and an H2O group between the
chains, thereby forming a heteropolyhedral framework.

* E-mail: plasil@fzu.cz
DOI: 10.1180/minmag.2013.077.7.07# 2013 The Mineralogical Society

J. PLÁŠIL ET AL.
K EY WORDS : Meisserite, new mineral, uranyl sulfate, crystal structure, Raman spectroscopy, infrared

spectroscopy, oxidation zone, acid-mine drainage, uranium, Blue Lizard mine, Utah.
Introduction
URANYL SULFATE minerals are widespread in mosturanium deposits because uraninite is commonly
associated with pyrite, marcasite and othersulﬁdes. Oxidative alteration of sulﬁde minerals
leads to the formation of solutions with low pH(Jambor et al., 2000). These acidic solutions arereferred to as acid-mine drainage (AMD) when
they have an anthropogenic origin, and they are
responsible for leaching and transport of heavy
elements on a large scale (Edwards et al., 2000;
Evangelou and Zhang, 1995). Uraninite exposed
to such conditions undergoes a hydration-oxidation weathering, followed by the release of U6+, as
the uranyl ion [UO2]2+, into solution. This very
mobile form of U occurs in an array of hydrated
oxo-hydroxo-sulfate complexes. Under appropriate natural conditions, solutions containing
these complexes and various other cations andanions can form diverse suites of uranyl sulfate
minerals. The observed occurrences of uranyl
sulfates are related to underground alteration,
where uraninite is exposed to the moist air in old
mining adits or weathering in old mine dumps andmill-tailings (see e.g. Brugger et al., 2003; Plášil
et al., 2012a,b; Schindler et al., 2012;
Krivovichev and Plášil, 2013). Krivovichev andPlášil (2013) reviewed 20 known U6+ sulfate
minerals that had been found in Nature. Since thatreport, four new uranyl sulfate minerals have been
described (mathesiusite, IMA2013-046, Plášil etal., 2013); bluelizardite, IMA2013-062, Plášil etal., in prep.; belakovskiite, IMA2013-075, Kampf
et al., in prep.) and meisserite, which is describedhere.
The new mineral honours the prominent Swiss
mineralogist Nicolas Meisser (born 1964) who is
Curator of Mineralogy and Petrography at theMusée Cantonal de géologie at Lausanne,
Switzerland and has authored or co-authored 38
new-mineral descriptions or redeterminations. As
meisserite is a new uranyl sulfate with uniquestructural topology, we are convinced that naming
this mineral for Nicolas is an appropriate
recognition for his important contributions to themineralogy, crystallography and geochemistry of
uranium. The new mineral and name have been
approved by the Commission on New Minerals,
Nomenclature and Classiﬁcation (CNMNC) of theInternational Mineralogical Association(IMA2013-039). There are three cotype specimens of the new mineral, one stored in thecollections of the Fersman Mineralogical Museumof the Russian Academy of Sciences, Moscow,
Russia (registration number 4410/1), the second
deposited in the collections of the Natural History
Museum of Los Angeles County, Los Angeles,
California, USA (catalogue number 64055) andthe third deposited in the collections of the Muséecantonal de géologie, Lausanne, Switzerland
under catalogue number MGL 92960.
Occurrence

2976

Meisserite was found underground in the Blue
Lizard mine, Red Canyon, White Canyon district,
San Juan County, Utah, USA (37º33’26’’N
110º17’44’’W) by one of the authors (JM). The
mineral is rare and occurs in association withother new uranyl sulfate minerals, which are
currently under investigation. The Blue Lizard
mine is located to the west of the town ofBlanding on the north side of Red Canyon andclose to the Markey mine. Underground workingsin the Blue Lizard mine were ﬁrst developed in
the mid 1950s and yielded uranium ore with
0.20 0.50% U 3 O 8 (Thaden et al., 1964).
Mineralized palaeostream channels are in the
Shinarump member of the Chinle Formation. The
Shinarump member consists of medium- tocoarse-grained sandstone, conglomeratic sandstone beds and thick siltstone lenses formed in a
braided-stream environment during the Upper
Triassic (Blakey and Gubitosa, 1984). Ore
minerals were deposited as replacements ofwood and other organic material and as
disseminations in the enclosing sandstone. Since
the mine closed in 1978, supergene oxidation ofprimary ores in the humid underground environment has produced a variety of secondary
minerals, mainly sulfates, as efﬂorescent crustson the surfaces of mine walls.
Minerals found in direct spatial association
with meisserite include chalcanthite, copiapite,
ferrinatrite, gypsum, johannite and another new
Na-containing uranyl sulfate (Fig. 1a) that has
been submitted to the CNMNC for approval under
the name belakovskiite (IMA2013-075). Primaryminerals in the general assemblage include
baryte, bornite, calcite, chalcopyrite, covellite,

MEISSERITE, A NEW URANYL SULFATE MINERAL FROM UTAH

are found as isolated crystal aggregates. Crystals
are prisms up to 0.3 mm long, elongated on [100](Fig. 1b) with prism forms {010} and {001};
terminations of the crystals probably consist ofmultiple forms, none of which could be measured
because the crystals occur in intergrowths.
Meisserite is pale green to yellowish green andhas a very pale yellow streak. Crystals aretranslucent to transparent with a vitreous lustre.
They are brittle, with fair cleavage on {100} and{001}, and have uneven fracture. The Mohs
hardness is estimated at 2. There is insufﬁcientmaterial for the direct determination of density. A
density of 3.208 g/cm3 was calculated based on
the unit-cell dimensions from single-crystal X-ray
data and electron microprobe results. Meisserite issomewhat hygroscopic. It shows bright yellow
green ﬂuorescence under both long- and shortwave UV radiation. The mineral is opticallybiaxial negative, with a = 1.514(1), b = 1.546(1),g = 1.557(1) (measured with white light). The
measured 2V is 60(2)º and the calculated 2V(calc.) is 60º. Dispersion is r > v, perceptible, andthe optical orientation is X & a, Z & c*. The
mineral is pleochroic, with X (colourless)< Y (pale yellow) & Z (pale greenish yellow).
The Gladstone-Dale compatibility, 1 (Kp/Kc), is
superior (0.018) for the empirical formula and thesingle-crystal cell.
FIG. 1. Meisserite from Blue Lizard mine, Utah, San
Juan County, USA. (a) Meisserite (greenish yellow) in
typical association with belakovskiite (IMA2013-075)(whitish ﬁbrous) and blödite. FOV 2 mm. (b) Rarely
developed prismatic crystals of meisserite. FOV
1.5 mm. Photo: J. Marty.

Chemical composition

feldspar, pyrite, quartz and uraninite. Secondary,post-mining minerals in the general assemblage
include atacamite, blödite, brochantite, chalcanthite, cobaltoblödite, copiapite, cyanotrichite,d’ansite, ferrinatrite, gypsum, halotrichite, johannite, kröhnkite, manganoblödite, metavoltine,
natrochalcite, natrozippeite, pickeringite, pseudojohannite, rhomboclase, römerite, sideronatrite
and tamarugite. The Blue Lizard mine is thetype locality for the recently described newminerals manganoblödite and cobaltoblödite(Kasatkin et al., 2013).
Physical and optical properties
Crystals of meisserite usually occur as intergrowths with other uranyl sulfates, and only rarely
2977

Quantitative chemical analyses of meisserite wereobtained using a Cameca SX100 electron microprobe (WDS mode, 15 kV, 2 nA and 15 mm beam
diameter) at the Institute of Geological Sciences,
Masaryk University in Brno, Czech Republic. The
following X-ray lines and standards were used: Kalines: S (SrSO4), Na (sanidine), Mb lines: U(rutherfordine). Other elements, such as K, Ca andMg, were sought, but none was above thedetection limits (~0.1 wt.% for the analyticalconditions used). Peak counting times (CT) were
10 20 s and the counting time for backgroundwas 50% of the peak CT. The measured
intensities were converted to element concentrations using the PAP program (Pouchou andPichoir, 1985). Analytical results are given in
Table 1. The H2O content was calculated bystoichiometry based on the crystal-structure
analysis (see below). Raman spectroscopy (seebelow) conﬁrmed the presence of OH and H2O
and the absence of other anions, such as PO4,
AsO4 and CO3. The empirical formula (based on

J. PLÁŠIL ET AL.

TABLE 1. Results of WDS analyses (in wt.%) of meisserite.

Na2O
SO3
UO3
H2O
Total

Mean (n = 4)

Range

Std. dev

20.42
34.98
61.46
3.90*
101.1619.76 20.86
34.23 36.57
58.29 63.77

0.46
0.61
1.10

Calculated on the basis of 19 O a.p.f.u.
Na
5.05
S6+
4.00
6+
U
0.94
H2O
1.66

19 O a.p.f.u.) is Na 5 . 0 5 (U 0 . 9 4 O 2 )(SO 4 ) 3[SO2.69(OH)1.31](H2O). The simpliﬁed formula is
Na5(UO2)(SO4)3(SO3OH)(H2O), which requires
Na2O 19.66, UO3 36.32, SO3 40.59, H2O 3.43,
total 100.00 wt.%.
Raman spectroscopy
The Raman spectrum of meisserite (Fig. 2) wasrecorded on a Thermo Scientiﬁc DXR Raman
Microscope interfaced to an Olympus microscope(objective 506) in the 50 3400 cm 1 spectral
region with ~2 cm 1 spectral resolution. The
power of the frequency-stabilized single mode

diode laser (532 nm) impinging on the sample
was set to 3 mW (20 s exposure, accumulation of
40 scans). The spectrometer was calibrated by asoftware-controlled (Omnic 8) calibration procedure using multiple neon emission lines (wavelength calibration), multiple polystyrene Raman
bands (laser frequency calibration) and standardized white light sources (intensity calibration).
Spectral manipulation such as background correction and band-component analysis was done with
Omnic 8 software. The interpretation of thespectrum follows those by Baran et al. (1999),
Haile et al. (1998), Vchirawongkwin et al. (2010),
Periasamy et al. (2009) and Sieber (1966).

FIG. 2. Raman spectrum of meisserite.

2978

MEISSERITE, A NEW URANYL SULFATE MINERAL FROM UTAH

The dominant feature in the Raman spectrum isa band at 847 cm 1, attributable to the n1 (UO2)
symmetric stretching mode. The antisymmetric n3(UO2)2+ stretching mode is not observable in the
spectrum. The doubly degenerate bending modeof (UO2)2+ (n2) is located at 241 cm 1. The U Obond length inferred from the UO2+
2 symmetricstretching frequency, following the empirical
relation given by Bartlett and Cooney (1989), is
1.76 Å. Corresponding bond lengths obtained
from the reﬁned structure are 1.764(2) for U O17
and 1.774(2) for U O18 (see below).
Vibrations attributable to SO4 and SO3OH
groups, respectively, may partly overlap, which
can be inferred e.g. from Haile et al. (1998) or
Periasamy et al. (2009). Bands at 1068, 1045,
1031, 1019, 990 and 975 cm 1 are assigned to n1
symmetric stretching modes of SO4 and SO3OH.
Those at 1239, 1213, 1186, 1153, 1139, 1139 and1102 cm 1 are attributable to the triply degenerate n3 SO4 and SO3OH antisymmetric stretchingvibrations. Raman bands at 633, 606 and589 cm 1 are assigned to triply degenerate n3(d) antisymmetric bending vibrations of thetetrahedral units and those at 464, 448 and414 cm 1 to the doubly degenerate n2 (d)symmetric bending mode of the tetrahedra. The
stretching mode n (S OH) is assigned to thevibration at 890 cm 1.
The O H stretching vibrations are generally
weak in Raman spectra; however, they areobservable in the meisserite spectrum as bandsof weak intensity at 3497 and 3366 cm 1. The
inferred O...O distances for the correspondinghydrogen bonds, calculated based on theempirical relation given by Libowitzky (1999),
are ~2.9 Å and ~2.78 Å, respectively. The weak
vibrations at 199, 171, 123, 96 and 61 cm 1 are
attributed to the lattice modes.

798.9(5) Å3. The observed powder data ﬁt wellwith those calculated from the structure, alsousing JADE 2010.
The Rigaku CrystalClear software package wasused for processing the diffraction data, including
the application of an empirical multi-scanabsorption correction using ABSCOR (Higashi,2001). The structure was solved independently bydirect methods using Sir2004 (Burla et al., 2005)
and the charge-ﬂipping algorithm (Oszlányi andSütő, 2004, 2008; Palatinus, 2013) implemented
in the Superﬂip program (Palatinus and Chapuis,2007). The crystal structure was reﬁned by thefull-matrix least-squares algorithm of the
Jana2006 program (Petřı́ček et al., 2006) basedon F2. All non-hydrogen atoms were reﬁned withanisotropic atomic displacement parameters(ADP). The H atoms were treated as having
ADP equal to 1.2*Ueq of the corresponding O
atom to which the particular H atom is linked. TheO H bonds were treated with soft constraints on
the bond-length of 0.90(8) Å. The ﬁnal R values
obtained from the reﬁnement were R1 = 0.018 andwR2 = 0.044 with a GoF = 1.36 for 3306
reﬂections with [I > 3s(I)]. The crystallographic
details, data collection and reﬁnement statistics
are given in Table 3. The ﬁnal atomic coordinatesand displacement parameters are given in
Table 4. Based on the interatomic distances(Tables 5 and 6), the bond-valence analysis forthe structure (Table 7) was carried out following
the approach of Brown (1981, 2002). The
crystallographic information ﬁle (CIF) and thestructure factors list has been deposited with the
Principal Editor of Mineralogical Magazine andand is available from www.minersoc.org/pages/
e_journals/dep_mat_mm.html).
Description of the crystal structure

X-ray crystallography and structure
determination
All powder and single-crystal X-ray diffraction
data were obtained using a Rigaku R-Axis Rapid
II curved imaging plate microdiffractometer
utilizing monochromatized MoKa radiation.
Observed powder dhkl values and intensities
were derived by proﬁle ﬁtting using JADE 2010
software. Data (in Å) are given in Table 2. Unitcell parameters reﬁned from the powder datausing JADE 2010 with whole-pattern ﬁtting are: a= 5.319(3), b = 11.499(3), c = 13.531(3) Å, a =102.84(1)º, b = 97.45(1)º, g = 91.41(1)º and V =2979

There are one U, four S, six Na, nineteen O andthree H atoms in the asymmetric unit of themeisserite structure (Table 4). The crystal structure consists of a heteropolyhedral framework,with fundamental blocks of inﬁnite uranyl-sulfate
chains extended along [010] (Fig. 3). The U atom
is strongly bonded to two O atoms (O17, O18), at
distances of ~1.76 and ~1.77 Å, forming theuranyl ion, UO2+
2 . It is further coordinated by ﬁve
O ligands arranged at the apices of a pentagonal
bipyramid with uranyl O atoms at the twovertices. The observed uranyl bond-lengths andU O equatorial bond-lengths (Table 5) match
closely the most typical values for [7]-coordinatedJ. PLÁŠIL ET AL.

TABLE 2. X-ray powder diffraction data for meisserite from Blue Lizard.
Iobs

dobs

dcalc

81 13.15
3 11.27
13 9.70
8
7.70
62

6.33

52

5.64

100 5.24
26

4.82

68

4.67

20

4.48

7

4.130

10

3.960

48

3.849

16

3.739

41

3.614

{

{
{
{
{

{
{

6

{
3.470 {

33

3.379

{

8

{
3.220 {

23

3.127

43

3.293

Icalc h k l

13.066 100 0 0 1
11.194 4 0 1 09.654 8 0 1̄ 1
7.682 5 0 1 1
6.533 14 0 0 26.300 29 0 1̄ 2
5.629 25 0 2̄ 1
5.597 13 0 2 05.266 58 1 0 05.155 5 0 1 2
5.137 25 1̄ 0 1
4.870 6 1̄ 1 0
4.827 8 0 2̄ 2
4.768 4 0 2 1
4.733 9 1̄ 1̄ 1
4.665 47 1 0 1
4.607 6 1̄ 1 1
4.520 6 1 1̄ 1
4.412 8 0 1̄ 3
4.261 3 1̄ 1̄ 2
4.120 7 1 1 1
3.960 7 1̄ 1 2
3.946 5 1̄ 2 0
3.893 4 0 2̄ 3
3.853 8 1̄ 2̄ 1
3.848 3 1 0 2
3.841 19 0 2 23.779 9 0 1 3
3.731 9 0 3 03.720 3 1̄ 2 1
3.613 20 0 3̄ 2
3.598 13 1̄ 1̄ 3
3.465 6 1 2̄ 2
3.458 4 1 1 2
3.390 16 0 3 1
3.374 4 1 2 1
3.347 22 0 1̄ 4
3.295 19 1̄ 1 3
3.267 13 0 0 43.218 6 0 3̄ 3
3.200 3 1 1̄ 3
3.127 19 1̄ 3 0
3.071 4 1̄ 3̄ 1
3.012 8 1̄ 3̄ 2
3.000 6 1̄ 1̄ 4

Iobs

dobs

93 2.969{

19 2.883{

46 2.813{

18 2.702
26 2.633

11 2.553{

10 2.515
11 2.483
19 2.420{{

3 2.335
12 2.272

19 2.213

30 2.126

7

2.022

7

1.989

16 1.959{{{{

dcalc Icalc

h k l

2.966
2.963
2.960
2.948
2.940
2.886
2.874
2.834
2.815
2.793
2.709
2.681
2.677
2.633
2.617
2.589
2.561
2.550
2.526
2.514
2.486
2.482
2.478
2.435
2.419
2.389
2.333
2.275
2.260
2.226
2.208
2.206
2.178
2.153
2.151
2.127
2.124
2.120
2.119
2.082
2.026
1.998
1.994
1.980
1.967
1.956
1.954

1̄ 0 40 3 2
0 1 4
1 3̄ 21 2 2
1 1 3
0 4̄ 11̄ 2̄ 41̄ 3̄ 30 3̄ 41̄ 3 2
1 3̄ 3
1 1̄ 42 0 0
0 4 1
1 2̄ 40 3 3
1̄ 3̄ 41̄ 1̄ 52 0 1
1̄ 4̄ 2
1̄ 0 5
1 4̄ 22̄ 2 01̄ 3 32̄ 2̄ 1
1 4̄ 31̄ 3̄ 5
2 2̄ 22 1 2
2̄ 1̄ 4
0 5̄ 30 0 6
2̄ 3̄ 1
2 1̄ 31̄ 2̄ 61̄ 2 52̄ 1 41̄ 0 62̄ 3 2
1̄ 5 1
2̄ 0 52̄ 3̄ 42̄ 2 42 4̄ 12̄ 3 3
2 1̄ 4

33
14
12
10
4
15
10
4
17
10
14
3
6
19
6
4
3
7
3
7
3
5
4
3
4
4
6
8
3
3
3
7
3
3
3
4
4
3
7
4
4
3
6
3
4
3
6

Iobs

dobs

47

1.918

{

17

1.874

{

15

1.850

{

9

1.808

25

1.779

19

1.733

20

1.706

15

1.678

{

{
{
{

15

{
1.590 {

13

1.551

{

24

1.517

{

12

1.478

8

1.433

6

1.409

15

1.649

{
{

dcalc Icalc

h k l

1.947
1.931
1.927
1.923
1.916
1.915
1.913
1.909
1.890
1.871
1.867
1.863
1.846
1.843
1.829
1.807
1.777
1.776
1.739
1.735
1.719
1.709
1.703
1.702
1.687
1.684
1.674
1.656
1.649
1.599
1.586
1.559
1.556
1.551
1.540
1.527
1.524
1.519
1.514
1.512
1.481
1.480
1.470
1.443
1.437
1.427
1.407

0 4̄ 6
0 5̄ 51 2 5
1 5 1
2̄ 4̄ 11̄ 5 2
0 6̄ 2
0 6̄ 10 2 6
2 3 2
1̄ 2̄ 71̄ 2 6
2 3̄ 42 1 4
0 5 3
1 6̄ 2
1 4̄ 6
0 5̄ 61 4 4
2 3 3
1̄ 5̄ 63 0 1
1̄ 4 53̄ 1̄ 31 0 7
3̄ 1 30 2̄ 81̄ 2̄ 8
1 5̄ 62̄ 5̄ 53̄ 3 2
2 6̄ 20 4 6
3̄ 2 4
1 2̄ 8
0 7̄ 51̄ 7̄ 42̄ 6̄ 13 1 3
1̄ 7 13̄ 4̄ 1
3 1̄ 41̄ 6̄ 72 2 6
3 3̄ 42 5̄ 6
0 8̄ 4

3
3
4
3
3
4
5
6
4
4
7
4
4
5
4
4
3
5
3
4
3
5
4
3
3
3
6
3
4
3
5
2
2
2
3
2
3
3
2
2
3
2
3
2
2
2
3

For d values greater than 1.56 Å, calculated lines with intensities of 3 or greater are shown. For d values less than
1.56 Å, calculated lines with intensities of 2 or greater are shown when they correspond to observed lines.

2980

MEISSERITE, A NEW URANYL SULFATE MINERAL FROM UTAHTABLE 3. Summary of data-collection conditions and reﬁnement parameters for meisserite.
Structural formula
Unit-cell parameters

Na5(UO2)(SO4)3(SO3OH)(H2O)
a = 5.32317(10) Å
b = 11.5105(2) Å
c = 13.5562(10) Å
a = 102.864(7)ºb = 97.414(7)ºg = 91.461(6)º

V (Å3)Z
Space group
Dcalc. (g.cm 3)
Temperature
Wavelength
Crystal dimensions (mm)Limiting y angles
Limiting Miller indicesNo. of reflections
No. of unique reflections
No. of observed reflections (criterion)
Absorption correction (mm 1), method
Tmin/Tmax
Coverage, Rint
F000

801.74(6)2P1̄
3.264 (applicable for the above given formula)298(2) K
MoKa, 0.71075 Å
0.1360.0660.04 mm
3.11 27.47º
6 4 h < 6, 14 4 k 4 14, 17 4 l 4 17
13998
3627
3306 [I > 3s(I)]10.883, analytical
0.332/0.670
0.99, 0.027
732

Param. refined, constraints, restraints
R1, wR2 (obs)
R1, wR2 (all)GoF (obs, all)Weighting scheme
Drmin, Drmax (e Å 3)

Refinement by Jana2006 on F2
274, 3, 3
0.0180, 0.0439
0.0215, 0.0457
1.36, 1.34
1/(s2(F) + 0.0004F2)
0.78, 0.78

U atoms provided by Burns et al. (1997). The ﬁve
equatorial O atoms of the pentagonal bipyramid
link to SO4 tetrahedra. Four of the ﬁve SO4
tetrahedra participate in chain linkages. The ﬁfth
sulfate group points towards the interlayer
between adjacent chains, linked by its freevertices to four distinct Na+ cations. The sequenceof the tetrahedral units within the chain can be
represented as ...udududu.... There remains one
symmetrically distinct SO4 tetrahedron (S4),which is located between the chains and islinked by the weaker bonds only to Na+. The S4tetrahedron is oriented up or down with respect tothe bc plane. The S4 tetrahedron contains a
protonated O atom (OH16), with a corresponding
OH16 H16...Ow19 hydrogen bond (Table 6).
The Ow19 atom links only to one Na6 atom andthe bond-valence analysis (Table 7) identiﬁes it asan H2O group. Hydrogen bonds from the Ow19

are accepted by O4 (UrF) and O6 (Na3F) atoms(Tables 6 and 7). Hydrogen bonds provide
additional linkage in the framework structure.
All of the Na sites were found to be fully
occupied. The structural formula of meisserite,
obtained from the reﬁnement and bond-valence
analysis, is Na5(UO2)(SO4)3(SO3OH)(H2O), with
Z = 2.
Discussion

2981

The meisserite structural topology has notpreviously been found in any naturally occurring
uranyl sulfate; however, there are several
synthetic compounds with structural units based
upon clusters or chains of uranyl and sulfate
polyhedra similar to those in the structure ofmeisserite. A similar inﬁnite uranyl-sulfate chain
is found in the structure of K2[(UO2)(SO4)2

2982

0.51553(2)0.53696(16)0.48968(17)0.47165(17)0.96290(18)00.4716(3)00.0011(3)0.9482(3)0.5866(4)0.5202(6)0.2901(5)0.2907(5)0.6528(5)0.5627(5)0.2126(5)0.5863(5)0.6176(5)0.2566(5)0.3360(5)0.5954(6)0.3715(5)1.0691(6)0.9695(6)0.7105(5)1.1472(5)1.079(8)0.2030(5)0.8268(5)0.9502(7)1.017(10)0.922(10)

U
S1
S2
S3
S4
Na1
Na2
Na3
Na4
Na5
Na6
O1
O2
O3
O4
O5
O6
O7
O8
O9
O10
O11
O12
O13
O14
O15
OH16
H16
O17
O18
Ow19
H19a
H19b

* Reﬁned isotropically.

x/a

Atom

0.726339(11)0.61313(8)1.02464(8)0.60341(8)0.17485(9)
0.32662(15)00.49703(15)0.21045(14)0.9623(2)0.7039(3)0.5562(3)0.5217(2)0.6709(2)1.0682(2)1.0214(2)0.9044(2)1.1035(2)0.3748(3)0.3569(2)0.5256(2)0.6662(2)0.1245(3)0.3042(3)0.1365(2)0.1239(3)0.132(4)0.6982(2)0.7599(2)0.8665(3)0.912(4)0.799(3)y/b0.421436(10)0.14996(7)0.36262(7)0.64320(7)0.06747(8)00.08994(12)
0.25123(13)0.32254(13)0.11352(15)0.0909(2)0.1505(2)0.1105(2)0.25806(19)0.2774(2)0.3616(2)0.3597(2)0.46037(19)0.3309(2)0.26893(19)0.3980(2)0.56277(19)0.1416(2)0.0879(2)0.0487(2)0.0331(2)0.085(3)0.3568(2)0.4885(2)0.1920(3)0.251(3)0.205(4)z/c0.01041(5)0.0121(3)0.0128(3)0.0125(3)0.0196(3)0.0466(11)0.0281(6)0.0287(9)0.0263(6)0.0251(6)0.0566(9)0.0301(11)0.0269(10)0.0205(9)0.0157(8)0.0223(9)0.0212(9)0.0221(9)0.0143(8)0.0293(11)0.0195(9)0.0281(10)0.0167(8)0.0308(11)0.0317(11)0.0216(9)0.0268(10)0.0322*0.0193(9)0.0190(9)0.0403(12)0.0483*0.0483*

Ueq
0.01315(8)0.0132(4)0.0183(5)0.0164(4)0.0195(5)0.0171(13)0.0366(10)0.0179(12)0.0208(8)0.0249(9)0.0341(11)0.0464(19)0.0188(15)0.0208(14)0.0169(13)0.0313(16)0.0168(14)0.0363(17)0.0166(13)0.0168(15)0.0252(15)0.051(2)0.0209(14)0.0324(17)0.0390(18)0.0175(14)0.0205(15)0.0140(13)0.0145(13)0.054(2)U110.00957(7)0.0140(4)0.0112(4)0.0118(4)0.0205(5)0.104(3)0.0272(9)0.0495(16)0.0324(9)0.0243(9)0.0974(19)0.0266(16)0.0418(18)0.0206(14)0.0185(13)0.0259(15)0.0280(15)0.0113(13)0.0130(12)0.0428(19)0.0246(15)0.0105(14)0.0180(13)0.0350(18)0.0191(15)0.0278(16)0.0333(17)0.0279(15)0.0245(15)0.041(2)U220.00852(7)0.0087(4)0.0093(4)0.0112(4)0.0186(5)0.0132(13)0.0183(9)0.0257(13)0.0282(10)0.0272(9)0.0243(11)0.0183(16)0.0158(15)0.0181(14)0.0094(13)0.0117(14)0.0159(14)0.0215(15)0.0114(13)0.0348(18)0.0108(13)0.0241(16)0.0142(13)0.0274(17)0.0344(19)0.0202(15)0.0239(17)0.0158(14)0.0160(14)0.0202(17)U330.00027(5)0.0005(3)0.0007(3)0.0027(3)0.0009(4)0.0051(14)0.0109(7)0.0091(11)0.0044(7)0.0001(7)0.0123(11)0.0002(14)0.0115(13)0.0065(11)0.0003(10)0.0031(12)0.0027(11)0.0038(12)0.0006(10)0.0006(13)0.0049(12)0.0036(13)0.0037(11)0.0049(14)0.0001(13)0.0003(12)0.0020(12)0.0013(11)0.0005(11)0.0213(18)U120.00252(5)0.0011(3)0.0047(3)0.0049(3)0.0071(4)0.0023(10)0.0009(7)0.0077(10)0.0023(7)0.0030(7)0.0092(9)0.0035(14)0.0034(11)0.0053(11)0.0013(10)0.0081(12)0.0014(11)0.0161(13)0.0005(10)0.0023(12)0.0089(11)0.0100(14)0.0028(11)0.0175(14)0.0083(15)0.0070(11)0.0005(12)0.0029(10)0.0006(10)0.0048(16)U13TABLE 4. Atomic positions and displacement parameters (Ueq, Uiso, in Å2) for the crystal structure of meisserite.

0.00154(5)0.0022(3)0.0022(3)0.0046(3)0.0018(4)0.0017(14)0.0047(7)0.0197(11)0.0157(8)0.0084(7)0.0168(11)0.0123(13)0.0019(13)0.0021(11)0.0014(10)0.0064(11)0.0002(11)0.0025(11)0.0008(10)0.0233(15)0.0042(11)0.0041(12)0.0095(11)0.0051(14)0.0013(13)0.0043(12)0.0027(13)0.0041(11)0.0013(11)0.0026(15)U23

J. PLÁŠIL ET AL.

MEISSERITE, A NEW URANYL SULFATE MINERAL FROM UTAHTABLE 5. Selected interatomic distances (in Å) for the structure of meisserite.
S1 O1
S1 O2
S1 O3ii
S1 O4<S1 O>

1.448(3)1.454(3)1.468(3)1.509(2)1.470

S3 O9iv
S3 O10v
S3 O11iv
S3 O12<S3 O>

1.446(3)1.467(3)1.483(3)1.489(3)
1.471

S2 O5
S2 O6
S2 O7
<S2 O8<S2 O>

1.452(3)1.473(3)1.482(3)1.497(2)1.476

S4 O13S4 O14S4 O15
S4 Oh16<S4 O>

1.435(4)1.454(3)1.460(3)1.562(3)1.478

2.347(3)2.347(3)2.272(3)2.272(3)2.772(3)2.772(3)2.46

Na2 O1vi
Na2 O2iii
Na2 O3
Na2 O10
Na2 O14
Na2 O14ii
Na2 O15<Na2 O>2.379(3)2.955(3)2.363(3)2.383(3)2.652(4)2.696(4)2.420(3)2.56

Na3 O6
Na3 O6viii
Na3 O7iii
Na3 O7i
Na3 O8iii
Na3 O8i
Na3 O18iii
Na3 O18i<Na3 O>

2.365(3)2.365(3)2.747(3)2.747(3)2.447(2)2.447(2)2.857(3)2.857(3)2.60

Na4 O2
Na4 O3
Na4 O4iii
Na4 O9
Na4 O10
Na4 O14ii
Na4 O17<Na4 O>2.368(4)2.374(3)2.756(3)2.322(4)2.451(3)2.791(3)2.562(3)2.52

Na5 O5ix
Na5 O6x
Na5 O9ii
Na5 O10ii
Na5 O12iv
Na5 O13xi
Na5 O18xii<Na5 O>2.515(3)2.735(3)2.447(3)2.460(3)2.676(3)2.420(3)2.627(3)2.55

Na6 O1
Na6 O5
Na6 O13xiii
Na6 O15xiv
Na6 O15vi
Na6 Oh16vii
Na6 Ow19<Na6 O>2.929(4)2.302(3)2.512(4)2.807(4)2.422(3)2.526(3)2.491(4)
2.57

O1
O1
O1
O1
O1
O2
O2
O3
O4
O4
O4
O5
O5
O5

2.406(5)2.401(4)2.398(4)2.995(4)2.909(4)2.383(4)2.426(3)2.384(3)2.789(3)2.834(4)2.883(4)2.420(4)2.394(4)2.404(4)

O6 O7
O6 O8
O6 O18i
O6 Ow19iii
O7 O8
O7 O8iO7 O18O8 O12i
O8 O18i
O9 O10ii
O9 O11O9 O12iv
O10 O11iii
O10 O12v

2.429(4)2.433(3)2.893(3)2.762(4)2.382(3)2.811(4)2.880(4)2.738(4)2.944(4)2.425(4)2.410(4)2.416(4)2.380(4)2.388(4)O11 O12O11 O12iv
O11 O18
O12 O17
O13 O14O13 O15
O13 Oh16
O14 O15O14 Oh16
O15 Oh16
Oh16 Ow19vi
O17 O18iii

2.861(4)2.389(4)2.873(4)2.924(4)2.411(5)2.436(4)2.351(4)2.403(4)2.424(4)2.430(4)2.535(5)2.852(4)

U O17
U O18
U O4
U O7
U O8i
U O11
U O12
<U OUr><U Oeq>1.764(2)1.774(2)2.380(3)2.419(3)2.422(2)2.318(3)2.382(3)
1.769
2.384

Na1 O2
Na1 O2vi
Na1 O3
Na1 O3vi
Na1 O14ii
Na1 O14vii<Na1 O>

O2
O3ii
O4
Oh16vii
Ow19
O3ii
O4
O4iii
O7
O11
O17
O6
O7
O8

Symmetry codes: (i) x+1, y+2, z+1; (ii) x+1, y, z; (iii) x 1, y, z; (iv) x+1, y+1, z+1; (v) x, y+1, z+1;(vi) x, y+1, z; (vii) x 1, y+1, z; (viii) x, y+2, z+1; (ix) x, y 1, z; (x) x+1, y 1, z; (xi) x+2, y, z; (xii)x+2, y+1, z+1; (xiii) x+2, y+1, z; (xiv) x+1, y+1, z.

(H2O)](H2O) (Ling et al., 2010); however, it
differs in that one vertex of the uranyl pentagonal
bipyramid is occupied by H2O rather than being
linked to an SO4 group. The orientation of thetetrahedral units in that structure may be written
2983

as ...dduu.... There are several structures ofinorganic uranyl sulfates containing uranylsulfate clusters, where the U:S ratio is 1:4(Hayden and Burns, 2002a,b; Burns andHayden, 2002); However, these structures

J. PLÁŠIL ET AL.

TABLE 6. Hydrogen-bond geometry in the structure of meisserite.
D H_A

D H (Å)

H_A (Å)D A (Å)]D H_A angle (º)

Oh16 H16_Ow19vi
Ow19 H19a_O6ii
Ow19 H19b_O4

0.83(4)0.91(4)0.86(5)1.71(4)
1.88(4)2.25(5)2.535(5)2.762(4)3.075(5)172(5)
163(5)
160(5)

Symmetry codes: (ii) x+1, y, z; (vi)

x,

y+1,

z.

contain bidentate linkages between uranyl pentagonal bipyramids and sulfate tetrahedra, whichhave not been observed in the structures of naturalminerals. The protonated sulfate group is rare inmineral structures (Hawthorne et al., 2000).
Those minerals known to contain SO3OH groups
in their structures include matteuccite (Catti et al.,1975), mercallite (Payan and Haser, 1976),
letovicite (Leclair et al., 1985) and mitryaevaite(Ankinovich et al., 1997; Cahill et al., 2001).

Prior to the discovery of meisserite and several
other new Na-bearing uranyl-sulfate minerals at
the Blue Lizard mine, natrozippeite,
Na5[(UO2)8(SO4)4O5(OH)3](H2O)12 (Frondel etal., 1976; Burns et al., 2003), was the only
known Na-bearing uranyl-sulfate mineral. That
made the identiﬁcation of natrozippeite in thegeological material seemingly ‘‘straightforward’’,often based only on qualitative EDS analyses (seee.g. Stefaniak et al., 2009). With the discovery of

FIG. 3. The crystal structure of meisserite viewed along [100]. The inﬁnite chains composed of uranyl pentagonal
bipyramids (blue) and sulfate tetrahedra (yellow) are linked by NaFn polyhedra and S4 sulfate tetrahedra into a 3D
framework with additional linkage provided by hydrogen bonds (blue dashed lines).

2984

2985

Na2

5.97

6.05

6.01

1.16

1.06

0.10, 0.09
0.0762; 0.19

0.21

0.21
0.2362; 0.04
0.2862; 0.22

Na1

1.08

0.0662;0.2262;0.0862;0.1862;

Na3

1.13

0.13

0.07

0.25
0.17

0.22
0.21
0.08

Na4

0.97

0.11

0.09
0.19

0.18
0.17

0.15
0.08

Na5

0.25
0.14

0.15

0.26

0.05

Na6

1.06

0.30

0.76

H16

0.95

0.70

0.25

H19a

0.90

0.73

0.17

H19b

1.87
2.07
2.23
2.13
2.00
2.05
2.03
2.07
2.05
2.08
2.05
2.05
2.01
1.84
2.07
2.08
1.97
1.76
1.89

SBV

Values are given in valence units (vu). SBV = sum of bond-valences incident at the atomic site; 62; = multiplicity. U6+ O bond strengths (r0 = 2.045, b = 0.51)
taken from Burns et al. (1997); Na+ O, S6+ O bond strengths taken from Brown and Altermatt (1985); H+ O (r0 = 0.569, b = 0.94) from Brown (2002).

6.07

1.67
1.58
1.56
1.18

S4

1.01

6.02

1.62
1.53
1.46
1.44

S3

SBV

1.59
1.50
1.47
1.41

S2

0.16

1.73
1.70

0.59
0.52

0.48
0.48

0.52

1.61
1.58
1.52
1.36

S1

O1
O2
O3
O4
O5
O6
O7
O8
O9
O10
O11
O12
O13
O14
O15
OH16
O17
O18
Ow19

U

TABLE 7. The bond-valence analysis for meisserite.

MEISSERITE, A NEW URANYL SULFATE MINERAL FROM UTAH

J. PLÁŠIL ET AL.

meisserite, as well as the other new Na-bearing
uranyl sulfates, the identiﬁcation of Na-bearing
uranyl sulfates in natural environments willclearly involve more demanding analytical
study, and earlier identiﬁcations, based primarilyon composition, require reassessment.
Acknowledgements
The authors are grateful to Ladislav Lapčák(Institute of Chemical Technology, Prague) for
help with Raman spectroscopic analysis. This
paper beneﬁted from reviews by Stuart Mills, ananonymous reviewer and structures editor Peter
Leverett. This study was ﬁnancially supported as
post-doctoral project 13-31276P of the Grant
Agency of the Czech Republic to JP and by the
grant Premium Academiae of the Academy of
Sciences of the Czech Republic; through the longterm project DKRVO 2013/02 of the Ministry of
Culture of the Czech Republic (National Museum,
0002 3272) to JČ and also by the John Jago
Trelawney Endowment to the Mineral Sciences
Department of the Natural History Museum of
Los Angeles County.
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