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

被引：7

作者：

Plasil, Jakub ^{[1
]}

Kampf, Anthony R. ^{[2
]}

Olds, Travis A. ^{[3
]}

Sejkora, Jiri ^{[4
]}

Skoda, Radek ^{[5
]}

Burns, Peter C. ^{[3
]}

Cejka, Jiri ^{[4
]}

机构：

[1] Inst Phys ASCR, Vvi, Na Slovance 1999-2, Prague 18221 8, Czech Republic

[2] Nat Hist Museum Los Angeles Cty, Mineral Sci Dept, 900 Exposit Blvd, Los Angeles, CA 90007 USA

[3] Univ Notre Dame, Dept Civil & Environm Engn & Earth Sci, Notre Dame, IN 46556 USA

[4] Natl Museum, Dept Mineral & Petrol, Cirkusova 1740, Prague 19300 9, Horni Pocernice, Czech Republic

[5] Masaryk Univ, Fac Sci, Dept Geol Sci, Kotlarska 2, Brno 61137, Czech Republic

来源：

AMERICAN MINERALOGIST | 2020年 / 105卷 / 04期

关键词：

Kroupaite; new mineral species; uranyl-oxide hydroxy-hydrate; crystal structure; Voronoi-Dirichlet polyhedral; Cs-135; Sr-90; Jachymov; CRYSTALLOGRAPHIC EVIDENCE; HYDROTHERMAL SYNTHESIS; URANIUM OXIDE; BECQUERELITE; SHEET; PHASES; CS; SHINKOLOBWE; PARAGENESIS; BILLIETITE;

D O I：

10.2138/am-2020-7311

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Kroupaite (IMA 2017-031), ideally KPb0.5[(UO2)(8)O-4(OH)(10)]center dot 10H(2)O, is a new uranyl-oxide hydroxylhydrate mineral found underground in the Svornost mine, Jachymov, Czechia. Electron-probe micro-analysis (WDS) provided the empirical formula (K(1.2)8Na(0.07))Sigma(1.35)(Pb0.23Cu0.14Ca0.05Bi0.03Co0.02Al0.01)(Sigma 0.48) [(UO2)(7.90)(SO4)(0.04)O-4.04(OH)(10.00)]center dot 10H(2)O, on the basis of 40 O atoms apfu. Sheets in the crystal structure of kroupaite adopt the fourmarierite anion topology, and therefore kroupaite belongs to the schoepite-family of minerals with related structures differing in the interlayer composition and arrangement, and charge of the sheets. Uptake of dangerous radionuclides (Sr-90 or Cs-135) 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.

引用

页码：561 / 568

页数：8

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