Journal of

GEOsciences

  (Formerly Journal of the Czech Geological Society)

Letter to editor

Jakub Plášil, Jiří Čejka

A note on the molecular water content in uranyl carbonate mineral andersonite

Journal of Geosciences, volume 60 (2015), issue 3, 181 - 187

DOI: http://dx.doi.org/10.3190/jgeosci.193



The crystal structure of andersonite from Jáchymov (western Bohemia, Czech Republic) was refined from single-crystal X ray diffraction data to an R = 0.0286 against 1657 unique observed reflections. Andersonite from Jáchymov is trigonal, R-32/m, with a = 17.8589(6), c = 23.6935(8), V = 6544.4(4) Å3 and Z = 18. The structural formula derived from the refinement of X-ray data is Na2Ca[(UO2)(CO3)3](H2O)5.28. This formula confirms previous structure determination on synthetic material. The maximal H2O content in andersonite is discussed also with regard to the published thermal analysis and vibration spectroscopy studies and disunities in chemical formula of andersonite in the literature.

Journal of Geosciences, Published by © Czech Geological Society, with support from the Czech Geological Survey.
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SNIP (Scopus, 2015): 0.700

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Policy: Open Access

ISSN: 1802-6222

E-ISSN: 1803-1943