更多ilmenite例句

1. The iron oxides, originally ilmenite, are usually altered to sphene.
2. Ilmenite has sometimes been mistaken in the South African mines for carbonado.
3. Among the accessory minerals may be mentioned apatite, magnetite, ilmenite, picotite and garnet.
4. Ilmenite has a black streak; it is opaque, but in very thin scales sometimes transparent with a clove-brown colour.
5. The principal titanium minerals are rutile (titanium oxide) and ilmenite (iron titanate).