Ingersonite

Formula: Ca3MnSb4O14

Origin of name:  For H. Ingerson, American geologist

 

Crystal system:  Hexagonal

Crystal class:  3m

Twinning: 

Unit cell: 

 

Colour:  Brownish yellow

Diaphaneity:  Transparent to translucent

Luster:  Vitreous

Habit:  Subhedral crystals 0.3 mm across in irregular aggregates 2-3 mm across

Hardness:  6.5

Specific gravity

Cleavage:  1; {0001} perfect

Tenacity: 

Streak:  Brownish yellow

 

Synonyms/varieties:

 

Comments: 

 

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