chromite

views updated May 08 2018

chromite Member of the chromite group of minerals in the spinel group, Fe2+Cr2O4, along with magnesiochromite (MgCr2O4); sp. gr. 5.1; black; sub-metallic lustre; crystals cubic, but normally it is massive or a granular aggregate; occurs in basic and ultrabasic rocks. It is the primary source of chromium.

chromite

views updated May 23 2018

chro·mite / ˈkrōˌmīt/ • n. a brownish-black mineral that consists of a mixed oxide of chromium and iron and is the principal ore of chromium.

chromite

views updated May 18 2018

chromite Black mineral, ferrous chromic oxide (FeO.Cr2O3), separated from magma in the formation of igneous rock. It is weakly magnetic and opaque. Hardness 5.5; r.d. 4.6.