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Mineral Structure Data ... Pyroxene Group ... The pyroxene group is composed of minerals of the general formula XYSi 2O6, where X and Y are two divalent cations or a monovalent and a trivalent cation.
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ruby.colorado.edu/~smyth/min/pyroxene.html
ruby.colorado.edu/~smyth/min/pyroxene.html
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The pyroxene structure consists of single chains of tetrahedra extending along the c axis of the unit cell. There are two types of cation positions, designated M1 and M2. The smaller M1 sites lie between the apices of opposing tetrahedra, and are almost regular octahedra.
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www.earth.ox.ac.uk/~davewa/pt/pt02_px.html
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structure, chemistry, petrogenesis ... The pyroxene quadrilateral forms part of a larger ternary system (CaSiO3-MgSiO3-FeSiO3), that includes another single chain silicate wollastonite. The Ca-rich clinopyroxenes are separated from the orthopyroxenes, and from the Ca-poor clionpyroxene pigeonite by a solvus (shown in green...
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jaeger.earthsci.unimelb.edu.au/msandifo/Teaching/Minera...
jaeger.earthsci.unimelb.edu.au/msandifo/Teaching/Minerals/pyroxene.html
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Ca atoms are connected to 8 oxygens in distorted octahedra. Mg atoms are connected to 8 oxygens. Si atoms are connected to 4 oxygens. The pyroxenes have chains of Si tetrahedra oriented parallel to the c ... Pyroxene has good {110} prismatic cleavages that are parallel to the c-axis and are at almost 90° to each other.
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www.geo.ucalgary.ca/~tmenard/crystal/pyroxene.html
www.geo.ucalgary.ca/~tmenard/crystal/pyroxene.html
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From Wikimedia Commons, the free media repository ... Usage of Pyroxene-structure-momoclinic-orthorhombic-stacking.gif on dewiki ... Category: Pyroxene...
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commons.wikimedia.org/wiki/File:Pyroxene-structure-momo...
commons.wikimedia.org/wiki/File:Pyroxene-structure-momoclinic-orthorhombic-stacking.gif
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; No higher resolution available. Pyroxene-structure-Ibeam-linking-a-b-plane.gif (580 × 570 pixels, file size: 37 KB, MIME type: image/gif) ... Usage of Pyroxene-structure-Ibeam-linking-a-b-plane.gif on dewiki...
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commons.wikimedia.org/wiki/File:Pyroxene-structure-Ibea...
commons.wikimedia.org/wiki/File:Pyroxene-structure-Ibeam-linking-a-b-plane.gif
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Interactive 3-D models of crystal structures ... Pyroxene cleaves along two planes that are parallel to the c-axis and are at almost 90° to each other. Try highlighting the Mg atoms and look down the c-axis (the initial view). The cleavage planes will be parallel to the unit cell diagonals. ... Crystal Structure of A Pyroxene...
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www.umanitoba.ca/chemistry/courses/chem130/molecules/cr...
www.umanitoba.ca/chemistry/courses/chem130/molecules/crystals/pyroxene.html
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Full Text (PDF) ... Alert me when this article is cited ... Email this article to a friend...
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canmin.geoscienceworld.org/cgi/content/abstract/32/3/54...
canmin.geoscienceworld.org/cgi/content/abstract/32/3/541
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Strikingly, the two types of silicate chains in the P2 1 cn structure alternate along the b axis in a tetrahedral layer parallel to (100). Such a mixed arrangement of two differently rotated silicate chains in a tetrahedral layer has not been observed in any other pyroxene structure.
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ammin.geoscienceworld.org/cgi/content/abstract/84/3/245
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