Letter to editor
A note on the molecular water content in uranyl carbonate mineral andersonite
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.
SNIP (Scopus, 2015): 0.700
IF (ISI, 2015): 1.326
Policy: Open Access