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Hydroxylapatite

Mineral Data
Ca5(PO4)3(OH)
Strunz: 
8.BN.05
Physical Properties
Crystal System: 
Hexagonal
Streak: 
White
Hardness: 
5.0
Tenacity: 
brittle
Synonyms
Synonyms: 
Apatite Ca O H and Hydroxyapatite