olivine(redirected from Olivine group)
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Related to Olivine group: pyroxene
A mineral silicate of iron and magnesium, principally (Mg, Fe)2SiO4, found in igneous and metamorphic rocks and used as a structural material in refractories and in cements. Also called chrysolite.
ol′i·vin′ic (-vĭn′ĭk), ol′i·vi·nit′ic (-və-nĭt′ĭk) adj.
1. (Minerals) an olive-green mineral of the olivine group, found in igneous and metamorphic rocks. The clear-green variety (peridot) is used as a gemstone. Composition: magnesium iron silicate. Formula: (MgFe)2SiO4. Crystal structure: orthorhombic. Also called: chrysolite
2. (Minerals) any mineral in the group having the general formula (Mg,Fe,Mn,Ca)2SiO4
[C18: from German, named after its colour]
ol•i•vine(ˈɒl əˌvin, ˌɒl əˈvin)
any of a group of magnesium iron silicates, (Mg,Fe)2SiO4, occurring in olive-green to gray-green masses as an important constituent of basic igneous rocks. Also called chrysolite.
An olive-green to brownish-green mineral consisting primarily of iron, magnesium, and silica. Olivine is a common mineral in the igneous rocks, such as basalt and gabbro, that make up most of the Earth's crust beneath the oceans.
A dark green silicate.
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|Noun||1.||olivine - a mineral consisting of magnesium iron silicate; a source of magnesium|
atomic number 12, magnesium, Mg - a light silver-white ductile bivalent metallic element; in pure form it burns with brilliant white flame; occurs naturally only in combination (as in magnesite and dolomite and carnallite and spinel and olivine)
mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
chrysolite - a brown or yellow-green olivine found in igneous and metamorphic rocks and used as a gemstone