omphacite


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omphacite

[′äm·fə‚sīt]
(mineralogy)
A grassy- to pale-green, granular or foliated, high-temperature aluminous clinopyroxene mineral with a vitreous luster that commonly occurs in the rock eclogite; a variety of augite.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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He addressed this problem by preparing mineral separates of two garnets and an omphacite, since no suitable garnet and omphacite specimens were available.
The used standards for major, minor, and REE components were wollastonite (Si), anorthite (Al, Ca), omphacite (Na), olivine (Mg), K-feldspar (K), Zr-jarosite (Zr), ilmenite (Ti), Cr pure (Cr), rhodonite (Mn, Zn), fayalite (Fe), celestine (Sr), sanbornite (Ba), and F-apatite (F).
Partzsch, "A ternary solid solution model for omphacite and its application to geothermobarometry of eclogites from the Middle Adula nappe (Central Alps, Switzerland)," Journal of Metamorphic Geology, vol.
The blueschist facies comprise of sodic amphibole + garnet + phengite + lawsonite and/or epidote [+ or -] omphacite [+ or -] quartz characterizing a broad range of pressure-temperature conditions (12-16 kbar, 380-500 [degrees]C) (Okay, 2002).
Dr Edward (Shang-i) Liu (The Hong Kong Institute of Gemmology) described several types of fei cui jade, consisting of various amounts of jadeite [+ or -] omphacite and kosmochlor.
(4) The dominant reaction products of AAS pastes were amorphous C-S-H and omphacite. The hydration products have high amounts of O, Na, Al, Si, and Ca elements, whereas the products of the M1.4N8 specimen exhibited a homogeneous and close-grained microstructure.