Albrechtschraufite

Albrechtschraufite is a very rare complex hydrated calcium and magnesium-bearing uranyl fluoride carbonate mineral with formula Ca₄Mg(UO₂)₂(CO₃)₆F₂·17H₂O.[1][2][3] 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. Its type locality is Jáchymov, Jáchymov District, Krušné Hory Mountains, Karlovy Vary Region, Bohemia, Czech Republic.

References

http://www.mindat.org/min-97.html Mindat
http://webmineral.com/data/Albrechtschraufite.shtml Webmineral
http://www.handbookofmineralogy.org/pdfs/albrechtschraufite.pdf Handbook of Mineralogy

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[1] ttp://www.mindat.org/min-97.html Mindat

[2] ttp://webmineral.com/data/Albrechtschraufite.shtml Webmineral

[3] ttp://www.handbookofmineralogy.org/pdfs/albrechtschraufite.pdf Handbook of Mineralogy