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Pyroxene. Pyroxene ( diopside) crystals from Afghanistan. The pyroxenes (commonly abbreviated Px) are a group of important rock-forming inosilicate minerals found in many igneous and metamorphic rocks. Pyroxenes have the general formula XY (Si,Al)2O6, where X represents calcium (Ca), sodium (Na), iron (Fe (II)) or magnesium (Mg) and more rarely ...
It is an achondrite meteorite from Mars. 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 .
orthopyroxene. Related Topics: enstatite. protoenstatite. ferrosilite. clinoenstatite. orthoferrosilite. 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.
- The Editors of Encyclopaedia Britannica
Orthopyroxene is a mixture of enstatite and ferrosilite components and is also called hypersthene. It is dark with a brownish tint in hand specimen and colourless to reddish under the microscope. Plagioclase is calcic and a labradorite composition is typical. The two minerals are present in mafic granulites.
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Dec 16, 2022 · Natural pyroxenes fall into two main series, distinguished by slightly different atomic arrangements and different crystal shapes: the orthopyroxene series (Opx) and the clinopyroxene series (Cpx).
Orthopyroxene mineral data, information about Orthopyroxene, its properties and worldwide locations.
Orthopyroxene is in many ways similar to clinopyroxene. The keys to identifying orthopyroxene are its relief, usually pale green (sometimes pleochroic to pink) color , low-order interference colors , and near 90 o cleavage seen in some views.
