EntityQ3649567· pop 10· linked from 5 articles

cafarsite

Cafarsite (·) is a rare calcium iron arsenite mineral. Manganese and titanium occur with iron in the formula.

Key facts

Mineral.name: Cafarsite
Mineral.category: Arsenites
Mineral.image: Cafarsite-tmix07-154b.jpg
Mineral.caption: Cafarsite on granite
Mineral.formula: ·
Mineral.IMAsymbol: Caf
Mineral.molweight: 2,230.31 g/mol
Mineral.strunz: 4.JC.05
Mineral.system: Isometric
Mineral.class: Diploidal (m) H–M Symbol (2/m )
Mineral.symmetry: Pn
Mineral.unit cell: a = 15.984 Å; Z = 4
Mineral.color: Dark brown
Mineral.habit: Cubic/octahedral crystals
Mineral.fracture: Conchoidal
Mineral.mohs: - 6
Mineral.luster: sub-metallic
Mineral.refractive: n = 2.2

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Cafarsite (·) is a rare calcium iron arsenite mineral. Manganese and titanium occur with iron in the formula.

It was first described in 1966 for an occurrence in the Binn Valley, Valais, Switzerland. Its name is from the composition, calcium, ferrum (iron), and arsenic. It has also been reported from Piedmont, Italy and the Hemlo gold mine in the Thunder Bay District, Ontario, Canada.