Phosphate mineral

Nickel–Strunz 9 ed mineral class number 8 (isolated tetrahedral units, mainly)

Phosphate minerals are minerals that contain the tetrahedrally coordinated phosphate anion, sometimes with arsenate and vanadate substitutions, along with chloride (Cl−), fluoride (F−), and hydroxide (OH−) anions, that also fit into the crystal structure.

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