The new K, Pb-bearing uranyl-oxide mineral kroupaite: Crystal-chemical implications for the structures of uranyl-oxide hydroxy-hydrates

0537722 - FZÚ 2021 RIV US eng J - Journal Article
Plášil, Jakub - Kampf, A.R. - Olds, T.A. - Sejkora, J. - Škoda, R. - Burns, P.C. - Čejka, J.
The new K, Pb-bearing uranyl-oxide mineral kroupaite: Crystal-chemical implications for the structures of uranyl-oxide hydroxy-hydrates.
American Mineralogist. Roč. 105, č. 4 (2020), s. 561-568. ISSN 0003-004X. E-ISSN 1945-3027
R&D Projects: GA ČR GA17-09161S
Institutional support: RVO:68378271
Keywords : Kroupaite * new mineral species * uranyl-oxide hydroxy-hydrate * crystal structure * Voronoi-Dirichlet polyhedral * Cs-135 * Sr-90 * Jachymov
OECD category: Mineralogy
Impact factor: 3.003, year: 2020
Method of publishing: Limited access
https://doi.org/10.2138/am-2020-7311

Kroupaite (IMA 2017-031), ideally KPb0.5[(UO2)8O4(OH)10]•10H2O, is a new uranyl-oxide hydroxylhydrate mineral found underground in the Svornost mine, Jáchymov, Czechia. Sheets in the crystal structure of kroupaite adopt the fourmarierite anion topology, and therefore kroupaite belongs to the schoepitefamily of minerals with related structures differing in the interlayer composition and arrangement, and charge of the sheets. Uptake of dangerous radionuclides (90Sr or 135Cs) into the structure of kroupaite and other uranyl-oxide hydroxy-hydrate is evaluated based on crystal-chemical considerations and Voronoi-Dirichlet polyhedra measures. These calculations show the importance of these phases for the safe disposal of nuclear waste.

Permanent Link: http://hdl.handle.net/11104/0315578