Revision of the symmetry and the crystal structure of čejkaite,
Na-4(UO2)(CO3)(3)

J 2013

Revision of the symmetry and the crystal structure of čejkaite, Na-4(UO2)(CO3)(3)

PLÁŠIL, Jakub; Karla FEJFAROVA; Michal DUŠEK; Radek ŠKODA; Jan ROHLÍČEK et al.

Základní údaje

Originální název

Revision of the symmetry and the crystal structure of čejkaite, Na-4(UO2)(CO3)(3)

Autoři

PLÁŠIL, Jakub; Karla FEJFAROVA; Michal DUŠEK; Radek ŠKODA a Jan ROHLÍČEK

Vydání

American Mineralogist, Mineralogical Society of America, 2013, 0003-004X

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10500 1.5. Earth and related environmental sciences

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Impakt faktor

Impact factor: 2.059

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/13:00072869

Organizační jednotka

Přírodovědecká fakulta

DOI

https://doi.org/10.2138/am.2013.4331

UT WoS

000317373200003

Klíčová slova anglicky

Cejkaite; uranyl carbonate; symmetry; crystal structure; single-crystal; twinning; X-ray diffraction

Štítky

AKR, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 9. 4. 2014 12:42, Ing. Andrea Mikešková

Anotace

V originále

The crystal structure of cejkaite, Na-4(UO2)(CO3)(3), from the type locality, was determined for the first time by single-crystal X-ray diffraction. In contrast to the previously reported pseudohexagonal triclinic symmetry, the current data indicate cejkaite is monoclinic, triply twinned, and belongs to the space group Cc. Refined unit-cell parameters are a = 9.2919(8), b = 16.0991(11), c = 6.4436(3) angstrom, beta = 91.404(5)degrees, and V = 963.62(12) angstrom(3). The monoclinic unit cell is also supported by the good fit to the powder diffraction data. The structure of cejkaite consists of uranyl tricarbonate clusters, forming sheets sub-parallel to (001) by sharing edges with (Na Phi) polyhedra. Sheets are interconnected through the uranyl O atoms and columns of (Nal Phi) polyhedra that share their trigonal faces. All Na atoms in the structure are in sixfold coordination. The structure refinement yielded R-obs = 0.0424 for 1687 observed reflections [I-obs > 3 sigma(I)] and 0.0538 for all 2016 unique reflections. Refinement and bond-valence analysis of the structure confirmed the previously proposed formula Na-4(UO2)(CO3)(3), Z = 4.

Návaznosti

EE2.3.20.0052, projekt VaV

Název: Výzkumný tým pro ukládání radioaktivních odpadů a jadernou bezpečnost

Citovat

PLÁŠIL, Jakub; Karla FEJFAROVA; Michal DUŠEK; Radek ŠKODA a Jan ROHLÍČEK. Revision of the symmetry and the crystal structure of čejkaite, Na-4(UO2)(CO3)(3). American Mineralogist. Mineralogical Society of America, 2013, roč. 98, č. 4, s. 549-553. ISSN 0003-004X. Dostupné z: https://doi.org/10.2138/am.2013.4331.

@article{1174102,
   author = {Plášil, Jakub and Fejfarova, Karla and Dušek, Michal and Škoda, Radek and Rohlíček, Jan},
   article_number = {4},
   doi = {https://doi.org/10.2138/am.2013.4331},
   keywords = {Cejkaite; uranyl carbonate; symmetry; crystal structure; single-crystal; twinning; X-ray diffraction},
   language = {eng},
   issn = {0003-004X},
   journal = {American Mineralogist},
   title = {Revision of the symmetry and the crystal structure of čejkaite, Na-4(UO2)(CO3)(3)},
   volume = {98},
   year = {2013}
}

TY  - JOUR
ID  - 1174102
AU  - Plášil, Jakub - Fejfarova, Karla - Dušek, Michal - Škoda, Radek - Rohlíček, Jan
PY  - 2013
TI  - Revision of the symmetry and the crystal structure of čejkaite, Na-4(UO2)(CO3)(3)
JF  - American Mineralogist
VL  - 98
IS  - 4
SP  - 549-553
EP  - 549-553
PB  - Mineralogical Society of America
SN  - 0003004X
KW  - Cejkaite
KW  - uranyl carbonate
KW  - symmetry
KW  - crystal structure
KW  - single-crystal
KW  - twinning
KW  - X-ray diffraction
N2  - The crystal structure of cejkaite, Na-4(UO2)(CO3)(3), from the type locality, was determined for the first time by single-crystal X-ray diffraction. In contrast to the previously reported pseudohexagonal triclinic symmetry, the current data indicate cejkaite is monoclinic, triply twinned, and belongs to the space group Cc. Refined unit-cell parameters are a = 9.2919(8), b = 16.0991(11), c = 6.4436(3) angstrom, beta = 91.404(5)degrees, and V = 963.62(12) angstrom(3). The monoclinic unit cell is also supported by the good fit to the powder diffraction data. The structure of cejkaite consists of uranyl tricarbonate clusters, forming sheets sub-parallel to (001) by sharing edges with (Na Phi) polyhedra. Sheets are interconnected through the uranyl O atoms and columns of (Nal Phi) polyhedra that share their trigonal faces. All Na atoms in the structure are in sixfold coordination. The structure refinement yielded R-obs = 0.0424 for 1687 observed reflections [I-obs > 3 sigma(I)] and 0.0538 for all 2016 unique reflections. Refinement and bond-valence analysis of the structure confirmed the previously proposed formula Na-4(UO2)(CO3)(3), Z = 4.
ER  -

PLÁŠIL, Jakub; Karla FEJFAROVA; Michal DUŠEK; Radek ŠKODA a Jan ROHLÍČEK. Revision of the symmetry and the crystal structure of čejkaite, Na-4(UO2)(CO3)(3). \textit{American Mineralogist}. Mineralogical Society of America, 2013, roč.~98, č.~4, s.~549-553. ISSN~0003-004X. Dostupné z: https://doi.org/10.2138/am.2013.4331.

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