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出典:Wikipedia
出典:『Wikipedia』 (2011/01/28 22:31 UTC 版)
Alunogen also called feather alum and hair salt is a colourless to white (although often coloured by impurities, like iron substituting for aluminum) fibrous to needle-like aluminium sulfate mineral often found on the walls of mines and quarries as secondary mineral. It can be found in the oxidation zones of some ore deposits as well as on burning coal dumps (i.e. as the product of millosevichite hydratation).