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1. agupubs.onlinelibrary.wiley.com › doi › fullPhase Transitions of Fe-, Al- and Ca-Bearing Orthopyroxenes at...

   agupubs.onlinelibrary.wiley.com › doi › full

   Jan 15, 2022 · Orthopyroxene is an important mineral in the typical peridotite and pyroxenite of Earth's upper mantle, and it also occurs as a constituent of many other types of igneous and metamorphic rocks, for example, gabbro, diorite, basalt, andesite, dacite, and granulite (Nesse, 2000).

   • Cited By: 2
   • Volume: 127, Issue1

   • Published: 15 January 2022

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

   en.wikipedia.org › wiki › Pyroxene

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   Structure. Pyroxenes are the most common single-chain silicate minerals. (The only other important group of single-chain silicates, the pyroxenoids, are much less common.) Their structure consists of parallel chains of negatively-charged silica tetrahedra bonded together by metal cations.

3. pubs.geoscienceworld.org › msa › amminPhase diagram and thermal expansion of orthopyroxene ...

   pubs.geoscienceworld.org › msa › ammin

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   Jul 1, 2021 · The MgGeO 3 orthopyroxene-clinopyroxeneilmenite triple point is determined to be at 0.98 GPa and 752 K, with the ilmenite phase stable at ambient conditions. The high-temperature (>600 K) thermal expansion of the clinopyroxene phase is greater than that of the other phases.

   • Author: Simon A. Hunt, Simon A. Hunt, James R. Santangeli, David P. Dobson, Ian G. Wood

   • Publish Year: 2021

4. en.wikipedia.org › wiki › OrthopyroxeniteOrthopyroxenite - Wikipedia

   en.wikipedia.org › wiki › Orthopyroxenite

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   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.

5. People also ask

   Is orthopyroxene a common mineral in diamonds?

   • Orthopyroxene is found as typical inclusion in lithospheric diamonds (Nestola, 2015; Stachel & Harris, 2008) and super-deep diamonds (Smith et al., 2018; Walter et al., 2011 ), indicating that it is a common mineral in the mantle.

   Phase Transitions of Fe‐, Al‐ and Ca‐Bearing Orthopyroxenes at High

   agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2021JB023133

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   What are the phase transitions of San Carlos orthopyroxenes?

   • The phase transitions of natural San Carlos Fe-, Al- and Ca-bearing orthopyroxene and two synthetic orthopyroxenes containing Al (up to 12 wt. % Al 2 O 3) and Fe (up to 15 wt. % FeO) were investigated at high pressures and temperatures up to ∼30 GPa and 700 K using synchrotron-based single-crystal X-ray diffraction.

   Phase Transitions of Fe‐, Al‐ and Ca‐Bearing Orthopyroxenes at High

   agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2021JB023133

   See all results for this question

   Which cation is most abundant in natural orthopyroxenes?

   • In natural orthopyroxenes, Mg 2+, Fe 2+, and Al 3+ are the most abundant cations other than Si 4+, and Ca 2+ usually occurs as a very minor component, as in San Carlos En 79 Fs 9 MgTs 10 Wo 2 in this study.

   Phase Transitions of Fe‐, Al‐ and Ca‐Bearing Orthopyroxenes at High

   agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2021JB023133

   See all results for this question

6. pubs.geoscienceworld.org › gsa › geologyWater concentration profiles in natural mantle orthopyroxenes ...

   pubs.geoscienceworld.org › gsa › geology

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   Jan 1, 2017 · Here, we report the first record of water content profiles (higher water in the cores than in the rims) in natural orthopyroxene grains in peridotite xenoliths hosted by Cenozoic alkali basalts in Tianchang volcano, eastern China.

   • Author: Zhen-Zhen Tian, Jia Liu, Qun-Ke Xia, Jannick Ingrin, Yan-Tao Hao, Depecker Christophe

   • Publish Year: 2017

7. www.sciencedirect.com › orthopyroxeneOrthopyroxene - an overview | ScienceDirect Topics

   www.sciencedirect.com › orthopyroxene

   Metamorphic mafic rocks that contain orthopyroxene (Opx) and plagioclase belong to the granulite facies. 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.

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9. www.britannica.com › science › orthopyroxeneOrthopyroxene | Silicate, Igneous, Olivine | Britannica

   www.britannica.com › science › orthopyroxene

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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.