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Alunogen

(Redirected from Feather alum)

Alunogen also called feather alum and 'hair salt is a colourless to white (although often coloured by impurities) fibrous mineral often found on the walls of mines and quarries.

Alunogen has the chemical formula: Al₂(SO₄)₃-17H₂O

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Categories: Geology stubs | Chemistry stubs | Minerals

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