Langisite
Langisite is an IMA-recognized mineral species in the sulfide class, with the chemical formula CoAs.
It crystallizes in the orthorhombic crystal system (space group Pnma). It is a member of the Nickeline structural group.
Key properties: specific gravity 8.174; Metallic luster.
IMA symbol Lgi, IMA status: approved, named in 1968.
Found in pockets of ore minerals, mineralized fault gouge, and breccia cemented with calcite and quartz.
It is found associated with Cobalt pentlandite, siegenite, parkerite, bravoite, safflorite, maucherite, pyrite, marcasite.
The name refers to the Langis mine in Canada, where it was discovered.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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