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 | Mineral |
| Formula (repeating unit) | 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
editReferences
edit- ^ Warr, L.N. (2021). "IMA-CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- ^ Mindat
- ^ Webmineral
- ^ Handbook of Mineralogy