Brianite

Formula:  Na2CaMg(PO4)2

Origin of name:  For Brian Mason, New Zealand - American mineralogist

 

Crystal system:  Monoclinic

Crystal class:  2/m

Twinning:

Unit cell:

 

Colour:  Colourless

Diaphaneity:  Transparent

Luster:

Habit:  Microscopic grains

Hardness:  4 to 5

Specific gravity:  3.0

Cleavage:  None

Tenacity:

Streak:

 

Synonyms/varieties:

 

Comments:  From a meteorite

 

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