noun
MineralogyA hydrated form of nickel sulphate which occurs as a secondary mineral associated with nickel ores, typically in the form of dark green crusts and tufts.
Retgersite is nickel sulphate hexahydrate, NiSO₄·6H₂O. Crystal system: tetragonal.
Origin
1940s. From the name of J. W. Retgers, Dutch chemist and crystallographer + -ite.
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