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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