Spangolite

sulphate/h2>

hydrothermal

Formula: Cu6Al(SO4)(OH)12Cl.3H2O
Hydrated sulphate containing hydroxyl and halogen
Specific gravity: 3.14
Hardness: 2 or 3 depending on face
Streak: Pale green
Colour: Dark green, bluish green, emerald green
Solubility: Insoluble in water. Readily soluble in acids.
Environments:

Hydrothermal environments

Spangolite is a rare secondary mineral commonly occurring with other secondary copper minerals in oxidised zones of copper-bearing ore bodies, associated with cuprite, connellite, brochantite, chalcophyllite, cyanotrichite, linarite, caledonite, clinoclase, azurite, malachite, aurichalcite, tenorite and chrysocolla.

At Broken Hill, New South Wales, Australia, a specimen of spangolite has been found as a coating on cerussite.

At the Mount Isa Block, Queensland, Australia, spangolite has been found on a fracture surface in chert, associated with chrysocolla.

At the type locality, Bisbee, Arizona, USA, spangolite is associated with cuprite nodules, and it has also been found with claringbullite and atacamite.

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