nantokiteMin.|ˈnæntəkaɪt| Also nantoquite. [f.Nantoco in Chile + -ite 2 b.] A white chloride of copper found in granular masses. 1872Dana Min.App. i. 11 Nantokite. .. Occurs in a copper vein with atacamite.1893Chapman Blowpipe Pract. 188 Nantokite..often greenish externally.