polyhalite
Meaning
A mineral usually occurring in fibrous masses, of a brick-red color, being tinged with iron, and consisting chiefly of the sulphates of lime, magnesia, and soda.
Examples
Shafts are now being sunk at Sirius Minerals' Woodsmith mine to extract polyhalite for use as an agricultural fertiliser, with much of the output exported.
Word Forms
polyhalites
Etymology
From German Polyhalit, from Ancient Greek πολύς (polús) + Ancient Greek ἅλς (háls) + -ite. Polyhalite is unrelated to halite other than name.