Formula: (Na,Y)6(Zn,Fe)5Ti12O29(O,F)10F4
Origin of name: For K. Murata, American geochemist
Crystal system: Cubic
Crystal class: -43m
Twinning:
Unit cell:
Colour: Black
Diaphaneity: Opaque to translucent
Luster: Submetallic
Habit: Anhedral grains
Hardness: 6 to 6.5
Specific gravity: 4.69
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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