Arsenate mineral

Arsenate minerals usually refer to the naturally occurring orthoarsenates, possessing the (AsO₄)³⁻ anion group and, more rarely, other arsenates with anions like AsO₃(OH)²⁻ (also written HAsO₄²⁻) (example: pharmacolite Ca(AsO₃OH)^.2H₂O) or (very rarely) [AsO₂(OH)₂]⁻ (example: andyrobertsite). Arsenite minerals are much less common. Both the Dana and the Strunz mineral classifications place the arsenates in with the phosphate minerals.

Example arsenate minerals include:

IMA-CNMNC proposes a new hierarchical scheme (Mills et al., 2009). This list uses it to modify the Classification of Nickel–Strunz (mindat.org, 10 ed, pending publication).

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