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Formula: Ca2(Al2V3+)(Si2O7)(SiO4)O(OH)
Sorosilicate (Si2O7 groups),
epidote group,
epidote supergroup
Crystal System: Monoclinic
Specific gravity: 3.47 calculated
Hardness: 8
Streak: Pale brownish grey
Colour: Black with a brownish tint
Luminescence: Not fluorescent under UV
Solubility: Soluble with difficulty in acids, but is dissolved by sulphuric acid after having been fused.
Common impurities: Fe,Cr,Mg,H2O,S
Environments
Localities
At the type locality, the Tashelginskoye Fe-(Co) deposit, Tashelga River, Gornaya Shoria Region, Kemerovo Oblast,
Russia, mukhinite occurs as irregular grains up to 5 mm across, and as irregular, short prismatic crystals
up to 1 x 2.5 mm; it is associated with goldmanite in areas of
marble enriched in pale green
muscovite and disseminated
pyrite, pyrrhotite,
chalcopyrite and
sphalerite
(AM 55.317-323).
At the Kuznetsk Alatau Range, Russia, mukhinite occurs as a late-stage mineral in
garnet-bearing metamorphic rocks. Associated minerals include
garnet, diopside,
titanite, quartz,
clinozoisite, galena and
molybdenite
(HOM).
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