Carbonate-fluorapatite

General Information:
 Chemical Formula:
Ca5(PO4,CO3)3F
 Composition:
(Molecular Weight = 486.82 gm)
Calcium 41.16 % Ca
Phosphorus 15.91 % P 
Carbon 1.23 % C 
Oxygen 37.79 % O 
Fluorine 3.90 % F 
 Empirical Formula:
Ca5(PO4)2.5(CO3)0.5F
 Environment:
Sedimentary and skarn rocks.
 Locality:
Wheal Franco, Devonshire, England.
 Name Origin:
Named as the carbonate and fluorine end-member and from the Greek apatao - "I am misleading."
Physical Properties:
 Color:
colorless or whitish.
 Density:
3.12
 Diaphaniety:
Transparent to Translucent
 Habits:
Massive - Uniformly indistinguishable crystals forming large masses., Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite)., Pulverulent - Forms a l oose, poorly-coherent powdery mass.
 Hardness:
5 - Apatite
 Luster:
Vitreous - Resinous
 Streak:
white
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