Uranotungstite, the only natural uranyl tungstate: Crystal
structure revealed from 3D electron diffraction

J 2022

Uranotungstite, the only natural uranyl tungstate: Crystal structure revealed from 3D electron diffraction

STECIUK, Gwladys; Uwe KOLITSCH; Viktor GOLIÁŠ; Radek ŠKODA; Jakub PLÁŠIL et. al.

Základní údaje

Originální název

Uranotungstite, the only natural uranyl tungstate: Crystal structure revealed from 3D electron diffraction

Autoři

STECIUK, Gwladys; Uwe KOLITSCH; Viktor GOLIÁŠ; Radek ŠKODA (203 Česká republika, domácí); Jakub PLÁŠIL (garant) a Franz Xaver SCHMIDT

Vydání

American Mineralogist, Mineralogical Society of America, 2022, 0003-004X

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10504 Mineralogy

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 3.100

Kód RIV

RIV/00216224:14310/22:00128917

Organizační jednotka

Přírodovědecká fakulta

DOI

https://doi.org/10.2138/am-2022-8112

UT WoS

000846936300005

EID Scopus

2-s2.0-85137832372

Klíčová slova anglicky

Uranotungstite; uranyl tungstate; crystal structure; crystal chemistry; Menzenschwand; 3D electron diffraction

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 22. 3. 2023 09:47, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

Uranotungstite is an uranyl-tungstate mineral that was until recently only partially characterized with a formula originally given as (Fe2+,Ba,Pb)(UO2)(2)(WO4)(OH)(4)center dot 12H(2)O and an unknown crystal structure. This mineral has been reinvestigated by electron microprobe analysis coupled with three-dimensional electron diffraction. According to the electron microprobe data, the holotype material from the Menzenschwand uranium deposit (Black Forest, Germany) has the empirical formula (Ba0.35Pb0.27)(Sigma 0.62)[(U6+O2)(2)(W0.986+Fe0.263+square(0.75))O-4.7(OH)(2.5)(H2O)(1.75)](H2O)(1.67) (average of 8 points calculated on the basis of 2U apfu; H2O content derived from the structure). According to the precession-assisted 3D ED data, holotype uranotungstite from Menzenschwand is monoclinic, P2(1)/m, with a = 6.318(5) angstrom, b = 7.388(9) angstrom, c = 13.71(4) angstrom, beta = 99.04(13)degrees, and V = 632(2) angstrom(3) (Z = 2). The structure refinement of the 3D ED data using the dynamical approach (R-obs = 0.0846 for 3287 independent observed reflections) provided a structure model composed of heteropolyhedral sheets. A beta-U3O8-type sheet of idealized composition [(UO2)(2)W6+Fe0.253+square O-0.75(4.75)(OH)(1.5)(H2O)(1.75)](0.25-) is composed of UO7 polyhedra linked by (W,Fe)O-5 polyhedra in which the W:Fe ratio is variable as well as the bulk occupancy of this site; the W site may also host a minor proportion of Cu, Mg, or V. In uranotungstite, the interlayer spaces between adjacent U-W-O sheets host water on one side and, on the other side, a partially occupied cation site mostly occupied by Ba and, to a lesser extent, Pb, as well as a partially occupied H2O site. This work is the first structural description of a natural uranyl-tungstate mineral and confirms the great structural and chemical flexibility of beta-U3O8 type of sheets.

Návaznosti

EF16_026/0008459, projekt VaV

Název: Dlouhodobý výzkum geochemických bariér pro ukládání jaderného odpadu

Citovat

STECIUK, Gwladys; Uwe KOLITSCH; Viktor GOLIÁŠ; Radek ŠKODA; Jakub PLÁŠIL a Franz Xaver SCHMIDT. Uranotungstite, the only natural uranyl tungstate: Crystal structure revealed from 3D electron diffraction. American Mineralogist. Mineralogical Society of America, 2022, roč. 107, č. 9, s. 1709-1716. ISSN 0003-004X. Dostupné z: https://doi.org/10.2138/am-2022-8112.

@article{2269079,
   author = {Steciuk, Gwladys and Kolitsch, Uwe and Goliáš, Viktor and Škoda, Radek and Plášil, Jakub and Schmidt, Franz Xaver},
   article_number = {9},
   doi = {https://doi.org/10.2138/am-2022-8112},
   keywords = {Uranotungstite; uranyl tungstate; crystal structure; crystal chemistry; Menzenschwand; 3D electron diffraction},
   language = {eng},
   issn = {0003-004X},
   journal = {American Mineralogist},
   title = {Uranotungstite, the only natural uranyl tungstate: Crystal structure revealed from 3D electron diffraction},
   url = {https://doi.org/10.2138/am-2022-8112},
   volume = {107},
   year = {2022}
}

TY  - JOUR
ID  - 2269079
AU  - Steciuk, Gwladys - Kolitsch, Uwe - Goliáš, Viktor - Škoda, Radek - Plášil, Jakub - Schmidt, Franz Xaver
PY  - 2022
TI  - Uranotungstite, the only natural uranyl tungstate: Crystal structure revealed from 3D electron diffraction
JF  - American Mineralogist
VL  - 107
IS  - 9
SP  - 1709-1716
EP  - 1709-1716
PB  - Mineralogical Society of America
SN  - 0003004X
KW  - Uranotungstite
KW  - uranyl tungstate
KW  - crystal structure
KW  - crystal chemistry
KW  - Menzenschwand
KW  - 3D electron diffraction
UR  - https://doi.org/10.2138/am-2022-8112
N2  - Uranotungstite is an uranyl-tungstate mineral that was until recently only partially characterized with a formula originally given as (Fe2+,Ba,Pb)(UO2)(2)(WO4)(OH)(4)center dot 12H(2)O and an unknown crystal structure. This mineral has been reinvestigated by electron microprobe analysis coupled with three-dimensional electron diffraction. According to the electron microprobe data, the holotype material from the Menzenschwand uranium deposit (Black Forest, Germany) has the empirical formula (Ba0.35Pb0.27)(Sigma 0.62)[(U6+O2)(2)(W0.986+Fe0.263+square(0.75))O-4.7(OH)(2.5)(H2O)(1.75)](H2O)(1.67) (average of 8 points calculated on the basis of 2U apfu; H2O content derived from the structure). According to the precession-assisted 3D ED data, holotype uranotungstite from Menzenschwand is monoclinic, P2(1)/m, with a = 6.318(5) angstrom, b = 7.388(9) angstrom, c = 13.71(4) angstrom, beta = 99.04(13)degrees, and V = 632(2) angstrom(3) (Z = 2). The structure refinement of the 3D ED data using the dynamical approach (R-obs = 0.0846 for 3287 independent observed reflections) provided a structure model composed of heteropolyhedral sheets. A beta-U3O8-type sheet of idealized composition [(UO2)(2)W6+Fe0.253+square O-0.75(4.75)(OH)(1.5)(H2O)(1.75)](0.25-) is composed of UO7 polyhedra linked by (W,Fe)O-5 polyhedra in which the W:Fe ratio is variable as well as the bulk occupancy of this site; the W site may also host a minor proportion of Cu, Mg, or V. In uranotungstite, the interlayer spaces between adjacent U-W-O sheets host water on one side and, on the other side, a partially occupied cation site mostly occupied by Ba and, to a lesser extent, Pb, as well as a partially occupied H2O site. This work is the first structural description of a natural uranyl-tungstate mineral and confirms the great structural and chemical flexibility of beta-U3O8 type of sheets.
ER  -

STECIUK, Gwladys; Uwe KOLITSCH; Viktor GOLIÁŠ; Radek ŠKODA; Jakub PLÁŠIL a Franz Xaver SCHMIDT. Uranotungstite, the only natural uranyl tungstate: Crystal structure revealed from 3D electron diffraction. \textit{American Mineralogist}. Mineralogical Society of America, 2022, roč.~107, č.~9, s.~1709-1716. ISSN~0003-004X. Dostupné z: https://doi.org/10.2138/am-2022-8112.

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