Hydrated arsenate with hydroxyl, mixite group
Specific gravity: 3.79
Hardness: 3 to 4
Streak: Lighter than colour
Colour: Emerald green to blue-green to whitish
Mixite is an uncommon secondary mineral in the oxidised zone of bismuth-bearing
associated with bismutite, skutterudite,
At the type locality, Jáchymov, Bohemia, Czech Republic, mixite occurs with bismutite, skutterudite and native bismuth.
At the St Anton mine and Humbachtal, Wittichen District, Germany, mixite occurs with erythrite and baryte.
At the San Rafael mine, Nye county, Nevada, USA, mixite is associated with plumbojarosite, olivenite and kaolinite.
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