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Gahnite |
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D'Ippolito V, Andreozzi G B, Bosi F, Halenius U, Mantovani L, Bersani D, Fregola R A |
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Mineralogical Magazine 77 (2013) 2941-2953 |
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Crystallographic and spectroscopic characterization of a natural Zn-rich spinel |
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approaching the endmember gahnite (ZnAl2O4) composition |
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Locality: Jemaa, Kaduna State, Nigeria |
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_database_code_amcsd 0019968 |
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8.0850 8.0850 8.0850 90 90 90 *Fd3m |
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.125 .125 .125 |
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atom x y z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) |
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AlM .5 .5 .5 .980 .00415 .00415 .00415 -.00035 -.00035 -.00035 |
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Fe2+M .5 .5 .5 .015 .00415 .00415 .00415 -.00035 -.00035 -.00035 |
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Fe3+M .5 .5 .5 .005 .00415 .00415 .00415 -.00035 -.00035 -.00035 |
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ZnT .125 .125 .125 .94 .00487 .00487 .00487 0 0 0 |
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Fe2+T .125 .125 .125 .03 .00487 .00487 .00487 0 0 0 |
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AlT .125 .125 .125 .03 .00487 .00487 .00487 0 0 0 |
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O .26414 .26414 .26414 .00452 .00452 .00452 -.00026 -.00026 -.00026 |
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View JMOL 3-D Structure (permalink) |
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