noun.
A saline evaporite composed of a mixture of potassium chloride and magnesium chloride, with the chemical formulaKMgCl3·6H2O.
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noun.
a white or reddish mineral consisting of hydrous chlorides of potassium and magnesium; used as a fertilizer and as a source of potassium and magnesium
Word Usage
"What weight of carnallite is necessary in the preparation of 500 g. of magnesium?"