Gananite
A rare isometric bismuth trifluoride mineral named for the Gannan region of China.
Intro adapted from Wikipedia (CC BY-SA).
Gananite is an IMA-recognized mineral species in the sulfide class, with the chemical formula BiF₃.
It crystallizes in the cubic crystal system (space group P-43m).
Key properties: Mohs hardness 3.5; specific gravity 8.928; Dark gray streak; Resinous to semimetallic luster; optically isotropic.
IMA symbol Gan, IMA status: approved, named in 1983.
Found in wolframite-bearing quartz veins.
It is found associated with Bismuth, bismuthinite, pyrite, chalcopyrite.
Presumably for its occurrence in the Ganan area, China.
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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