Min. [ad. G. syngenit (Zepharovich, 1872), f. Gr. συγγενής akin, cognate + -ITE1: so named from ‘its close relation to polyhalite’ (Dana).] A hydrous sulphate of calcium and potassium, occurring in colorless or white tabular crystals; also called KALUSZITE.
1875. Watts, Dict. Chem., VII. 1142.
