Arsenate minerals usually refer to the naturally occurring orthoarsenates, possessing the (AsO 4) 3− anion group and, more rarely, other arsenates with anions like AsO 3 (OH) 2− (also written HAsO 4 2−) (example: pharmacolite Ca(AsO 3 OH). 2H 2 O) or (very rarely) [AsO 2 (OH) 2] − (example: andyrobertsite).

Arsenates occur naturally, in hydrated and anhydrous form, in a variety of minerals. Examples of arsenate-containing minerals include adamite, alarsite, annabergite, erythrite and legrandite. [7] When two arsenate ions balance the charge in a formula, it is called diarsenate for example zinc diarsenate, Zn 3 (AsO 4) 2.

The arsenate minerals, which are salts of arsenic acid, contain arsenate groups (AsO 4) in which four oxygen (O) atoms are arranged at the corners of a tetrahedron about a central arsenic (As) atom.

Arsenate minerals are those minerals containing the arsenate (AsO 4 3−) anion group. Both the Dana and the Strunz mineral classifications place the arsenates in with the phosphate minerals.

Aug 28, 2022 · The phosphate group contains many minerals, but most are extremely rare. Apatite is the only common example. Vanadates and arsenates, which are closely related to the phosphates in chemistry and structure, are also rare.

The Arsenate subclass (and to a lesser extent the Vanadate Subclass) of the Phosphate Class almost perfectly mirrors the true phosphates in many ways including structure, diversity and properties. The only major difference is the arsenate or vanadate ion replacing the phosphate ion.

Apr 1, 2003 · Molecular structures of the basic copper arsenate minerals olivenite, cornubite, cornwallite, and clinoclase were studied using a combination of infrared emission spectroscopy and Raman spectroscopy. Infrared emission spectra of the basic copper arsenates were obtained over the temperature range 100 to 1000 °C.

Aug 30, 2019 · Eh–pH diagrams have been prepared for the most common arsenate minerals formed at 25 °C and 1 bar pressure. These theoretical diagrams reproduce the major mineral association relations of common arsenate minerals observed in the environment. The diagrams are useful in a number of ways.

Nov 25, 2022 · 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).

Common arsenic oxide minerals include arsenates or As 5 + species such as scorodite, arseniosiderite, and pharmacosiderite and aresnites or As 3 + species such as claudetite (As 2 O 3) and arsenolite (As 2 O 3).