| 释义 |
titanite Min.|ˈtaɪtənaɪt|
[ad. Ger. titanit (Klaproth, 1795), f. titan-ium + -it, -ite1; named from its containing the metal titanium.]
1. A mineral composed chiefly of calcium titanosilicate, CaO.TiO2.SiO2; also called sphene.
Iron is present in varying amounts, sometimes also manganese and yttrium.
1858Dana Min. (1868) 385 Titanite occurs in imbedded crystals in granite, gneiss, mica, schist, syenite [etc.]. 1879Rutley Stud. Rocks x. 140 Sphene (titanite) crystallises in the monoclinic system.
†2. Erroneously applied by Kirwan to the mineral now called rutile, a form of titanium dioxide, which he took to be an element. Obs.
1796Kirwan Elem. Min. (ed. 2) II. 329. 1799 Monthly Rev. XXX. 349 Among the metals, are overlooked the Tellurite..and Titanite. 1812Sir H. Davy Chem. Philos. 430 Titanium is obtained from a mineral long known by the name of red schorl or titanite. |