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  1. en.wikipedia.org › wiki › PyroxenePyroxene - Wikipedia

    Pyroxenes that crystallize in the monoclinic system are known as clinopyroxenes and those that crystallize in the orthorhombic system are known as orthopyroxenes . The name pyroxene is derived from the Ancient Greek words for 'fire' ( pyr πυρ) and 'stranger' ( ksénos ξένος ).

  2. 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 .

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    • Pronunciation
    • Noun
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    (Received Pronunciation) IPA(key): /ˌɔːθə(ʊ)paɪˈɹɒksiːn/
    (General American) IPA(key): /ˌɔɹθoʊpaɪˈɹɑksin/, /-θə-/
    Hyphenation: or‧tho‧py‧rox‧ene

    orthopyroxene (plural orthopyroxenes) 1. (mineralogy) Any pyroxene that forms orthorhombic crystals.quotations ▼ 1.1. 1981 November 10, D. Wyborn, B. W. Chappell, and R. M. Johnston, “Three S‐Type Volcanic Suites from the Lachlan Fold Belt, Southeast Australia”, in Journal of Geophysical Research, volume 86, number B11, DOI:10.1029/JB086iB11p10335,...

  4. 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. These minerals differ in the ratio of magnesium to iron in the crystal structure; their composition ranges from pure magnesium silicate (MgSiO3) to pure ferrous iron silicate ...

  5. orthopyroxene (opx) A series of pyroxenes which crystallize in the orthorhombic system. They consist of the enstatite (MgSiO 3) and ferrosilite (FeSiO 3) endmembers, with a number of other minerals between, including bronzite, hypersthene, and eulite. A Dictionary of Earth Sciences

  6. Orthopyroxene - XYZ2O6. Optical properties: • Colour and Pleochroism: Colourless. • Form: crystals form stubby prisms elongate along the c-axis, basal sections are 4 or 8 sided and show two cleavages at 90°. • Cleavage: typical pyroxene cleavages parallel to {110}, which intersect at ~90°. • Twinning: simple and lamellar twins and ...

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