Azoproite (Asoproite)

Formula:  (Mg,Fe)2(Fe,Ti,Mg)BO5

Origin of name:  From AZOPRO, acronym for a Russian geological association

 

Crystal system:  Orthorhombic

Crystal class:  2/m 2/m 2/m

Twinning:

Unit cell: a = 9.26 Å, b = 12.25 Å, c = 3.01 Å

 

Colour:  Black

Diaphaneity: Transparent to subopaque, transparent in thin section

Luster:  Adamantine

Habit:  Crystals prismatic

Hardness:  5.5

Specific gravity:  3.63

Cleavage:  2; {010} and {001} good

Tenacity: Brittle

Streak: Gray

 

Synonyms/varieties:

 

Comments:  Hardness approximate

 

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