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Aegirine-augite |
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Bertolo S, Nimis P, Dal Negro A |
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American Mineralogist 79 (1994) 668-674 |
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Low-Ca augite from experimental alkali basalt at 18 kbar: Structural variation |
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near the miscibility gap |
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Atomic parameters from ICSD |
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9.689 8.824 5.280 90 107.60 90 C2/c |
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atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) |
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Ca 0 .2874 .25 .774 .0208 .0325 .0196 0 .0020 0 |
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Na 0 .2874 .25 .226 .0208 .0325 .0196 0 .0020 0 |
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Mg 0 .9056 .25 .901 .0130 .0106 .0162 0 .0036 0 |
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Fe1 0 .9056 .25 .099 .0130 .0106 .0162 0 .0036 0 |
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Si .2917 .0918 .2414 .0133 .0110 .0207 -.0002 .0056 -.0012 |
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O1 .1154 .0868 .1413 .0143 .0170 .0217 .0019 .0049 -.0010 |
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O2 .3679 .2522 .3329 .0269 .0145 .0334 -.0042 .0143 -.0064 |
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O3 .3534 .0174 .0088 .0147 .0368 .0366 -.0008 .0059 -.0191 |
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Fe2 0 .2229 .25 .011 .025 |
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| Download AMC data (View Text File)
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Aegirine-augite |
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Ghose S, Kersten M, Langer K, Rossi G, Ungaretti L |
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Physics and Chemistry of Minerals 13 (1986) 291-305 |
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Crystal field spectra and Jahn Teller effect of Mn3+ |
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in clinopyroxene and clinoamphiboles from India |
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Note: variety blanfordite |
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9.6787 8.8394 5.2755 90 106.903 90 C2/c |
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atom x y z occ Biso |
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CaM2 0 .30020 .25 .34 .85 |
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NaM2 0 .30020 .25 .66 .85 |
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AlM1 0 .90098 .25 .02 .45 |
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TiM1 0 .90098 .25 .01 .45 |
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FeM1 0 .90098 .25 .52 .45 |
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MnM1 0 .90098 .25 .09 .45 |
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MgM1 0 .90098 .25 .36 .45 |
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Al .28911 .09109 .23338 .005 .35 |
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Si .28911 .09109 .23338 .995 .35 |
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O1 .11465 .08185 .13927 .59 |
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O2 .35967 .25376 .30926 .69 |
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O3 .35132 .01229 .00546 .59 |
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| Download AMC data (View Text File)
Download CIF data (View Text File)
Download diffraction data (View Text File)
View JMOL 3-D Structure
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