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calamine
The former name of two zinc minerals, smithsonite (naturally-occurring zinc carbonate) and hemimorphite (hydrated zinc silicate). In medicine, calamine lotion (a pink powder of zinc carbonate and some ferric oxide dissolved in mineral oils) is a mild astringent used in the form of a lotion, cream, or ointment to treat eczema, chickenpox, and other itchy skin diseases. For the treatment of psoriasis it is included in a coal tar preparation.
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• GEOLOGY AND PLANETARY SCIENCE• HEALTH AND DISEASE
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