Hübnerite

Hubnerite named after German mineralologist, Adolf Huebner. Hubnerite chemical formula: MnWO₄. Has a molecular weight of 302.79 g/mol. manganese makes up 18.14% of chemical composition, tungsten: 60.72%, oxygen: 21.14%. cleavage:[010] Perfect. color: Brown, reddish brown, brownish black. density: 7.15 g/cm³ fracture: brittle. Mohs hardness: 4.5-between flourite and apatite. luster: submetallic. streak: red-brown. diaphaniety:Transparent to translucent. crystalline structure: monoclinic-prismatic.

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