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Orthopyroxènes. Ce sont des minéraux allant de l' enstatite (pôle magnésien) à l' orthoferrosilite (pôle ferreux). La formule chimique générale est (Mg,Fe) 2 Si 2 O 6 . Dans cette série on trouve l' hypersthène ( 50 à 70 % de Mg [réf. nécessaire]) et la bronzite ( 70 à 90 % de Mg [réf. nécessaire] ).
Pyroxenes were so named due to their presence in volcanic lavas, where they are sometimes found as crystals embedded in volcanic glass; it was assumed they were impurities in the glass, hence the name meaning "fire stranger". However, they are simply early-forming minerals that crystallized before the lava erupted.
Orthopyroxene mineral data, information about Orthopyroxene, its properties and worldwide locations.
Orthopyroxenite is an ultramafic and ultrabasic rock that is almost exclusively made from the mineral orthopyroxene, the orthorhombic version of pyroxene and a type of pyroxenite. It can have up to a few percent of olivine and clinopyroxene.
Charnockite (/ ˈ tʃ ɑːr n ə k aɪ t /) is any orthopyroxene-bearing quartz-feldspar rock formed at high temperature and pressure, commonly found in granulite facies’ metamorphic regions, sensu stricto as an endmember of the charnockite series.
Formula: (Mg,Fe)SiO 3 Orthorhombic. Description: Orthopyroxenes are a group of minerals ranging from pure MgSiO 3 (enstatite) to pure FeSiO 3 (ferrosilite). Bronzite and hypersthene are orthopyroxenes mid-way between these two end members.
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Orthopyroxene, any of a series of common silicate minerals in the pyroxene family. Orthopyroxenes typically occur as fibrous or lamellar (thin-plated) green masses in igneous and metamorphic rocks and in meteorites.
