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Chlorapatite

Year of discovery: 1860 (Kragerø, Norway, and Dicksberg, Sweden), 1904 (Japan)

Locality list: 4 localities of chlorapatite

• Ca₅(PO₄)₃Cl
• Ca₅(PO₄,CO₃)₃(Cl,OH,F)
• [Ca²⁺₅][Cl|(PO₄)₃]^10-

• Class: Apatite group - Apatite supergroup
• Class: Phosphate - Chloride
• Soluble in: HCl, HNO₃
• Fluorescence: UV excitation

• Ca => Pb: Pyromorphite
• Ca => Ba: Alforsite

• Ca₅ => Ca₂Pb₃: Phosphohedyphane

• PO₄ => AsO₄: Turneaureite

• Cl => F: Fluorapatite
• Cl => OH: Hydroxylapatite, Hydroxylapatite-M

• Color: White
• Streak: White
• Luster: Resinous
• Diaphaneity: Transparent-Translucent

• Habit: Prismatic, Tabular

• Cleavage: Indistinct on {0001} and {1010}
• Hardness: 5
• Density: 3.2

• System: Hexagonal
• Group: 6/m, P6₃/m
• Lattice: a=9.6, c=6.8

Synonym: Apatite-(CaCl) had been valid during 2008-2010.