Kotoite

Formula:  Mg3B2O

Origin of name:  For Bundjiro Koto, Japanese geologist

 

Crystal system:  Orthorhombic

Crystal class:  2/m 2/m 2/m

Twinning: 

Unit cell: 

 

Colour:  Colourless

Diaphaneity:  Transparent

Luster:  Vitreous

Habit:  Massive, granular; disseminated grains

Hardness:  6.5

Specific gravity:  3.04

Cleavage:  2; {110} perfect, {101} parting

Tenacity: 

Streak: 

 

Synonyms/varieties:

 

Comments: 

 

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