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Albrechtschraufite

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Albrechtschraufite is a very rare complex hydrated calcium and magnesium-bearing uranyl with formula Ca4Mg(UO2)2(CO3)6F2·17H2O. Its molar weight is 1,428.98 g, color yellow-green, streak white, density 2.6 g/cm3, Mohs hardness 2-3, and luster is vitreous (glassy). It is named after Albrecht Schrauf (1837–1897), Professor of Mineralogy, University of Vienna is Jáchymov, Jáchymov District, Krušné Hory Mountains, Karlovy Vary Region.

Identification