Mukhinite
Mukhinite is an IMA-recognized mineral species in the silicate class, with the chemical formula Ca₂(Al₂V³⁺)[Si₂O₇][SiO₄]O(OH).
It crystallizes in the monoclinic crystal system. It is a member of the Clinozoisite, Epidote structural group.
Key properties: Mohs hardness 8; specific gravity 3.47; Light brownish gray streak; Vitreous luster; optically biaxial.
IMA symbol Muk, IMA status: approved, named in 1968.
Found in marble in association with an iron deposit (Tashelginskoye deposit, Russia); a late-stage mineral in garnet-bearing metamorphic rocks (Kuznetsk, Kazakhstan).
It is found associated with Goldmanite, muscovite, pyrite, pyrrhotite, sphalerite, chalcopyrite (Tashelginskoye deposit, Russia); garnet, diopside, titanite, quartz, clinozoisite, galena.
In honor of Aleksei Stepanovich Mukhin (1910–1974), geologist with the West Siberian Geological Survey.