syngenite

noun

syn·​ge·​nite

ˈsinjəˌnīt

plural -s

: a mineral K₂Ca(SO₄)₂.H₂O consisting of a hydrous calcium potassium sulfate and occurring in colorless or white tabular crystals (hardness 2.5, specific gravity 2.6)

Word History

Etymology

German syngenit, from Greek syngenēs related + German -it -ite; from its relationship to polyhalite

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