Formula: Ca5(SiO4)2(OH,F)2
Origin of name: for Reinhard Brauns, German mineralogist
Crystal system: monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: light pink
Diaphaneity:
Luster: vitreous
Habit: anhedral to subhedral grains to 3 mm
Hardness: 5 to 6
Specific gravity: 2.84
Cleavage: 1; {110} distinct
Tenacity:
Streak: white
Synonyms/varieties:
Comments:
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