Aluminite is an earthly white monoclinic mineral that never exhibits crystal form. It is very soft and forms an oxidation product of marcasite and pyrite together with aluminous silicates. Aluminite was first invented in 1807 in Germany.
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what is the definition of aluminite
a mineral, hydrous aluminum sulfate, Al2(SO4)(OH)4⋅7H2O, occurring in white, chalky masses.