Miharaite
Miharaite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula PbCu₄FeBiS₆.
It crystallizes in the orthorhombic crystal system (space group Pb2_1m).
Key properties: specific gravity 6.06; Metallic. Anisotropism: Moderate, from grayish blue to pinkish brown or yellowish brown. Bireflectance: Very faint luster.
IMA symbol Mih, IMA status: approved, named in 1976.
Occurs as disseminations in a hedenbergite-garnet-epidote contact metamorphic deposit (Mihara mine, Japan); in a mineralized quartz vein through granite (Imooka mine, Japan); in a bornite vein in copper skarn ore (Ulsan mine, Korea).
It is found associated with Wittichenite, bornite, chalcopyrite, galena.
The name is taken from the type locality at the Mihara mine, Japan.