pyroxene mineral having equal amount ofcao and feo molecule is known as
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The minerals that make up igneous rocks crystallize at a range of different temperatures. ... with some of the silica in the magma to form pyroxene. ... Mafic magmas have 45% to 55% SiO2, about 25% total of FeO and MgO plus ... The proportions of the main chemical components of felsic, intermediate
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