Reinvestigation of the crystal structure of kasolite, Pb[(UO2)(SiO4)](H2O), an important alteration product of uraninite, UO2-x.
Result description
The crystal structure of kasolite, Pb[(UO2)(SiO4)](H2O), Z=4, monoclinic, with a=6.7050(3), b=6.9257(2), c=13.2857(5)A, b=105.064(4)°, V=595.74(3) A3, the space group P21/c, has been solved by charge-flipping method and refined by the full-matrix least-squares techniques to an agreement factor(Robs) of 2.2% for 1243 unique observed reflections. The crystal structure of kasolite contains 1 unique U6+ position that is part of a nearly linear uranyl ion (UO2)2+, coordinated in the equatorial plane by fiveO ligands, forming pentagonal bipyramid. The uranyl pentagonal bipyramid s share edges to form chains parallel to [010]. The additional edge of uranyl polyhedra is shared by silicate tetrahedra to form sheets parallel to (100). There is one unique position of Pb2+ in the interlayer. O ligands and 1 (H2O) non-transformer group coordinate Pb2+ exhibiting [2 + 6] coordination.
Keywords
The result's identifiers
Result code in IS VaVaI
Alternative codes found
RIV/00023272:_____/13:#0002125 RIV/00216224:14310/13:00072873
Result on the web
DOI - Digital Object Identifier
Alternative languages
Result language
angličtina
Original language name
Reinvestigation of the crystal structure of kasolite, Pb[(UO2)(SiO4)](H2O), an important alteration product of uraninite, UO2-x.
Original language description
The crystal structure of kasolite, Pb[(UO2)(SiO4)](H2O), Z=4, monoclinic, with a=6.7050(3), b=6.9257(2), c=13.2857(5)A, b=105.064(4)°, V=595.74(3) A3, the space group P21/c, has been solved by charge-flipping method and refined by the full-matrix least-squares techniques to an agreement factor(Robs) of 2.2% for 1243 unique observed reflections. The crystal structure of kasolite contains 1 unique U6+ position that is part of a nearly linear uranyl ion (UO2)2+, coordinated in the equatorial plane by fiveO ligands, forming pentagonal bipyramid. The uranyl pentagonal bipyramid s share edges to form chains parallel to [010]. The additional edge of uranyl polyhedra is shared by silicate tetrahedra to form sheets parallel to (100). There is one unique position of Pb2+ in the interlayer. O ligands and 1 (H2O) non-transformer group coordinate Pb2+ exhibiting [2 + 6] coordination.
Czech name
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Czech description
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Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DB - Geology and mineralogy
OECD FORD branch
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Result continuities
Project
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Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Nuclear Materials
ISSN
0022-3115
e-ISSN
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Volume of the periodical
434
Issue of the periodical within the volume
1-3
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
7
Pages from-to
461-467
UT code for WoS article
000315752000059
EID of the result in the Scopus database
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Basic information
Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
DB - Geology and mineralogy
Year of implementation
2013