| 释义 |
octahedrite Min.|ɒktəˈhiːdraɪt, -ˈhɛdraɪt|
Also octo-.
[f. as prec. + -ite1 2 b.]
1. Native dioxide of titanium, occurring in crystals of octahedral and other related forms; also called anatase.
1805R. Jameson Syst. Min. II. 493. 1831 Brewster Optics xvii. 149. 1868 Dana Min. (ed. 5) 241.
2. An iron meteorite which shows a Widmanstätten structure on etching due to intimate intergrowths of plates of kamacite with narrow borders of tænite oriented parallel to the faces of a regular octahedron.
1916Mineral. Mag. XVIII. 42 (table) Nickel-poor octahedrites. 1944C. Palache et al. Dana's Syst. Min. (ed. 7) I. 120 A similar structureless aspect can be obtained in an octahedrite by prolonged heating at about 900°. 1974Encycl. Brit. Micropædia VII. 477/2 Besides nickel-iron, major minerals in octahedrites are troilite and schreibersite. |