Min. [Named (by H. Ross 1856) after Von Carnall of the Prussian mines (Dana).]
A hydrous chloride of potassium and magnesium, occurring as a milk-white mineral (but often reddish from admixture of oxide of iron and organic matter) in the salt mines in Prussia and Persia. It is now an important source of potash.
1876. Page, Adv. Text-bk. Geol., xvi. 305. A series of saliferous strata—carnallite, kieserite, [etc.].
1882. Playfair, in Macm. Mag., XLV. 335. Potash … now found in the minerals carnallit and kainit, in such inexhaustible quantity.
