Kimzeyite

Formula:  Ca3(Zr,Ti)2(Si,Al,Fe)3O12

Origin of name:  For the Kimzey family, American mineral collectors

 

Crystal system:  Cubic

Crystal class:  4/m -3 2/m

Twinning: 

Unit cell: a = 12.46 Ǻ

 

Colour:  Dark brown

Diaphaneity: 

Luster:  Vitreous

Habit:  Crystals dodecahedrons modified by trapezohedrons, small

Hardness:  ~ 7

Specific gravity:  4.0

Cleavage:  None

Tenacity: 

Streak:  Light brown

 

Synonyms/varieties:

 

Comments: 

 

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