Chlorapatite: Ca₅(AsO₄)₃Cl

Chlorapatite (pentacalcium triarsenate chloride), Ca₅(AsO₄)₃Cl crystallizes in the hexagonal system and is closely related to its phospate analogs, Ca₅(PO₄)₃X (X = Cl, OH), but has a slightly modified structure in terms of anion sites.

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