Adamite

arsenate

azurite

Formula: Zn2(AsO4)(OH)
Arsenate
Specific gravity: 4.3 to 4.5
Hardness: 3½
Streak: White
Colour: Colourless, white, yellow, green (copper adamite), and pink to violet (cobalt adamite).
Solubility: Readily soluble in hydrochloric acid and sulphuric acid.

Environments:

Hydrothermal environments

Adamite is a secondary arsenate that occurs in the oxidation zone of high-temperature lode zinc- and arsenic-bearing hydrothermal mineral deposits, associated with azurite, goethite, hemimorphite, mimetite, olivinite, scorodite and smithsonite.
Adamite is abundant and widespread at the San Rafael Mine, Nevada, USA. It usually occurs alone there, but it has been found associated with wulfenite and smithsonite, or with segnitite and duftite (R&M.85.6.514-515).

Common impurities: Cu,Fe,Co

Back to Minerals