Arsenate
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The arsenate is an ion with the chemical formula AsO3−4. Bonding in arsenate consists of a central arsenic atom, with oxidation state +5, double bonded to one oxygen atom and single bonded to a furthe
Adamite, a naturally occurring arsenate mineral.
Pourbaix diagram showing the distribution of arsenate and arsenite species in water. Oxygenated waters have a high pe value and arsenate species dominate. In deoxygenated water, with low pe, arsenite species dominate.
Adamite
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Adamite is a zinc arsenate hydroxide mineral, Zn2AsO4OH. It is a mineral that typically occurs in the oxidized or weathered zone above zinc ore occurrences. Pure adamite is colorless, but usually it p
Arsenate
…most organisms. 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. When two arsenate ions balance the charge in a formula, it is called diarsenate for example zinc…
Yellow-green adamite in limonite
Adamite on limonite from the Gold Hill District Tooele County, Utah, US. Scale at bottom is c. 2.5 cm.