Kamiokite

Formula:  Fe₂Mo₃O₈

Origin of name:  From locality; Kamioka mine, Japan

Crystal system:  Hexagonal

Crystal class:  6mm

Twinning: 

Unit cell: a = 5.782, c = 10.053

Colour:  Black

Diaphaneity:  Opaque

Luster:  Metallic to submetallic

Habit:  Euhedral grains, hexagonal tabular crystals to 3 mm

Hardness:  4.5

Specific gravity:  5.96

Cleavage:  1; {0001} perfect

Tenacity: 

Streak:  Black

Synonyms/varieties:

Comments: