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polyhalite


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Mineral, K2Ca2Mg(SO4)4.2H2O; sp. gr. 2.8; hardness 2.5–3.0; triclinic; normally flesh-pink to brick-red, and translucent; silky to resinous lustre; usually occurs as fibrous or lamellar masses; cleavage {100}, parting {010}; occurs in bedded evaporite deposits and is one of the last minerals to be precipitated from saline waters, due to its high solubility; tastes bitter.

Subjects: Earth Sciences and Geography.


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