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A mineral, Cu2(AsO4)(OH), a basic arsenate of copper, that is brown, olive green, or gray in color and found in copper deposits.
[German Olivenit : Olive, olive (from Latin olīva; see olive) + -it, n. suff. (from Latin -īta; see -ite1).]
(Minerals) a green to black rare secondary mineral consisting of hydrated basic copper arsenate in orthorhombic crystalline form. Formula: Cu2(AsO4)(OH)
[C19: from German Oliven(erz) olive (ore) + -ite1]