Brownmillerite

Formula:  Ca2(Al,Fe)2O5

Origin of name:  For L. Brownmiller, American chemist

 

Crystal system:  Orthorhombic

Crystal class:  mm2

Twinning:

Unit cell:

 

Colour:  Reddish brown

Diaphaneity:

Luster:

Habit:  Microscopic tetragonal platelets

Hardness:

Specific gravity:  3.76

Cleavage:  None

Tenacity:

Streak:

 

Synonyms/varieties:

 

Comments:

 

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