Mukhinite

Formula:  Ca2Al2V(SiO4)3(OH)

Origin of name:  For A. Mukhin, Russian geologist

 

Crystal system:  Monoclinic

Crystal class:  Unknown

Twinning: 

Unit cell: 

 

Colour:  Black, with brownish tint

Diaphaneity: 

Luster:  Vitreous

Habit:  Crystals short prismatic, irregular; irregular grains

Hardness:  8

Specific gravity:  3.47

Cleavage:  2; {001} perfect, {100} less perfect

Tenacity: 

Streak:  Pale brownish grey

 

Synonyms/varieties:

 

Comments: 

 

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