One of the mysteries of the English language finally explained.
A colourless or white mineral of the monoclinic crystal system which is a double nitrate and sulphate of sodium, Na₃(NO₃)(SO₄)·H₂O, occurring as prismatic and tabular crystals in nitrate and saline deposits.
Late 19th century; earliest use found in American Naturalist. From the name of Ludwig Darapsky, Chilean chemist and mineralogist + -ite, after German Darapskit.
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