Reinhardbraunsite

General Information:
 Chemical Formula:
Ca5(SiO4)2(OH,F)2
 Composition:
(Molecular Weight = 419.57 gm)
Calcium 47.76 % Ca
Silicon 13.39 % Si
Hydrogen 0.36 % H 
Oxygen 36.23 % O 
Fluorine 2.26 % F 
 Empirical Formula:
Ca5(SiO4)2(OH)1.5F0.5
 IMA Status:
Approved IMA 1983
Physical Properties:
 Cleavage:
[110] Distinct
 Color:
light pink.
 Density:
2.84
 Hardness:
5-6 - Between Apatite and Orthoclase
 Luster:
Vitreous (Glassy)
 Streak:
white
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