Albrechtschraufite

Albrechtschraufite (IMA symbol: Asf^[1]) is a very rare complex hydrated calcium and magnesium-bearing uranyl fluoride carbonate mineral with formula Ca₄Mg(UO₂)₂(CO₃)₆F₂·17H₂O.^[2][3][4] 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.

Albrechtschraufite
General
Category	Minerals
Formula	Ca4Mg(UO2)2(CO3)6F2·17H2O
IMA symbol	Asf
Crystal system	Triclinic
Identification
Formula mass	1,428.98 g
Color	Yellow green
Cleavage	None
Fracture	Conchoidal
Mohs scale hardness	2–3
Luster	Vitreous
Density	2.6 g/cm3
Optical properties	Biaxial (−)
Other characteristics	Radioactive

See also

• List of minerals
• List of minerals named after people