Zeitschrift für Kristallographie - Crystalline Materials
Editor-in-Chief: Pöttgen, Rainer
Ed. by Antipov, Evgeny / Bismayer, Ulrich / Boldyreva, Elena V. / Huppertz, Hubert / Petrícek, Václav / Tiekink, E. R. T.
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A Detailed Study of the Dehydration Process in Synthetic Strelkinite, Na[(UO2)(VO4)] · nH2O (n = 0, 1, 2)
1Nizhny Novgorod State University, Nizhny Novgorod, Russische Föderation
2Nizhny Novgorod State University, Nizhny Novgorod, Russische Föderation
3Nizhny Novgorod State University, Nizhny Novgorod, Russische Föderation
4Nizhny Novgorod State University, Nizhny Novgorod, Russische Föderation
5Christian-Albrechts-Universität zu Kiel, Inst. für Geowissenschaften, Abt. Mineralogie/Kristallographie, Kiel, Deutschland
Citation Information: Zeitschrift für Kristallographie - Crystalline Materials. Volume 227, Issue 8, Pages 522–529, ISSN (Print) 2194-4946, DOI: 10.1524/zkri.2012.1480, July 2012
- Published Online:
Synthetic strelkinite Na[(UO2)(VO4)] · nH2O (n = 0, 1, 2) was systematically investigated by single crystal X-ray diffraction and thermoanalytical methods. The anhydrous form and two hydrates were isolated as single crystals and the structures of these phases solved: Na[(UO2)(VO4)], monoclinic, P21/c, a = 6.0205(1) Å, b = 8.3365(1) Å, c = 10.4164(2) Å, β = 100.466(2)°, V = 514.10(1) Å3, R1 = 0.0337; Na[(UO2)(VO4)] · H2O, monoclinic, P21/c, a = 7.722(2) Å, b = 8.512(1) Å, c = 10.480(4) Å, β = 113.18(3)°, V = 633.3(3) Å3, R1 = 0.1658; Na[(UO2)(VO4)] · 2 H2O, monoclinic, P21/n, a = 16.2399(5) Å, b = 8.2844(2) Å, c = 10.5011(2) Å, β = 97.644(2)°, V = 1400.24(6) Å3, R1 = 0.0776. A possible mechanism of the structural transformation processes during dehydration is proposed based on the structures of the anhydrous phase and the hydrates.
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