Forms a series with mansfieldite.
Specific gravity: 3.27
Hardness: 3½ to 4
Colour: Green, grey, blue, yellow-brown, nearly colourless, violet; colourless to greenish or in transmitted light.
Solubility: Soluble in acids. Decomposes in strong alkali with separation of hydrous iron oxide.
Scorodite is found as a primary mineral at hydrothermal deposits,
for example Saubach, Germany, but mostly as a
secondary mineral from the oxidation of
arsenopyrite or other arsenic-containing minerals. It is associated with
vivianite, gypsum and
Alters to limonite.
Common impurities: Al
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