Počet záznamů: 1

The crystal structure of natural zippeite, K.sub.1.85./sub.H+.sub.0.15./sub.[(UO.sub.2./sub.).sub.4./sub.O.sub.2./sub.(SO.sub.4./sub.).sub.2./sub.(OH).sub.2./sub.](H.sub.2./sub.O).sub.4./sub., from Jáchymov, Czech Republic

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    0369756 - FZU-D 2012 RIV CA eng J - Článek v odborném periodiku
    Plášil, J. - Mills, S.J. - Fejfarová, Karla - Dušek, Michal - Novák, M. - Škoda, R. - Čejka, J. - Sejkora, J.
    The crystal structure of natural zippeite, K1.85H+0.15[(UO2)4O2(SO4)2(OH)2](H2O)4, from Jáchymov, Czech Republic.
    Canadian Mineralogist. Roč. 49, č. 4 (2011), s. 1089-1103 ISSN 0008-4476
    Grant CEP: GA ČR(CZ) GAP204/11/0809
    Výzkumný záměr: CEZ:AV0Z10100521
    Klíčová slova: uranyl minerals * X-ray diffraction * crystal structure * Jana2006 * bond-valence approach
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
    Impakt faktor: 1.115, rok: 2011

    The crystal structure of natural zippeite,K1.85H+0.15[(UO2)4O2(SO4)2(OH)2](H2O)4, from Jáchymov, Czech Republic, has been determined by single-crystal X-ray diffraction. Zippeite is monoclinic, space group C2/m, with a 8.7802(6), b 13.9903(12), c 8.8630(6) Å, beta 104.524(7)°, V 1053.92(12) Å3. The structure consists of structural sheets of the zippeite uranyl anion topology and an interlayer, in which split K atoms and disordered O atoms (of the H2O groups) are located. The structure unit >[(UO2)4O2(SO4)2(OH)2]2– is novel for both natural and synthetic compounds, but generally consistent with the known zippeite-type structures.
    Trvalý link: http://hdl.handle.net/11104/0203749