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valentinite

[val-uh n-ti-nahyt, -tee-nahyt] /ˈvæl ən tɪˌnaɪt, -ˌti naɪt/
noun
1.
a mineral, antimony trioxide, Sb 2 O 3 , formed by the oxidation of various minerals containing antimony and occurring in the form of white orthorhombic crystals.
Origin
1855-1860
1855-60; < German Valentinit, named after Basil Valentine, 15th-century German alchemist; see -ite1
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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