Albrechtschraufite
An exceptionally rare yellow-green uranyl fluoride-carbonate with a complex formula and a Mohs hardness of only 2–3.
Intro adapted from Wikipedia (CC BY-SA).
Albrechtschraufite is an IMA-recognized mineral species in the carbonate class, with the chemical formula MgCa₄F₂[UO₂(CO₃)₃]₂·17-18H₂O.
It crystallizes in the triclinic crystal system (space group P-1).
Key properties: Mohs hardness 2–3; specific gravity 2.6.
IMA symbol Asf, IMA status: approved, named in 1983.
On a museum specimen of schröckingerite.
It is found associated with Schröckingerite, uraninite, dolomite.
The mineral was named to honor Professor Albrecht Schrauf (1837–1897), Austrian crystallographer, University of Vienna, Vienna, Austria.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data and a Wikipedia introduction — a full written entry hasn’t been published yet.
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