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Maghemite |
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Pecharroman C, Gonzalez-Carreno T, Iglesias J E |
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Physics and Chemistry of Minerals 22 (1995) 21-29 |
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The infrared dielectric properties of maghemite, gamma-Fe2O3, |
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from reflectance measurement on pressed powders |
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Sample: a) idealized |
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8.33 8.33 8.33 90 90 90 *Fd3m |
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.125 .125 .125 |
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atom x y z occ |
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Fe-oct 1/2 1/2 1/2 5/6 |
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Fe-tet 1/8 1/8 1/8 |
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O 1/4 1/4 1/4 |
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| Download AMC data (View Text File)
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View JMOL 3-D Structure
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Maghemite |
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Pecharroman C, Gonzalez-Carreno T, Iglesias J E |
| |
Physics and Chemistry of Minerals 22 (1995) 21-29 |
|
The infrared dielectric properties of maghemite, gamma-Fe2O3, |
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from reflectance measurement on pressed powders |
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Sample: b) idealized |
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8.33 8.33 8.33 90 90 90 P4_132 |
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atom x y z occ |
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Fe-oct1 7/8 7/8 7/8 1/3 |
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Fe-oct2 1/8 7/8 1/8 |
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Fe-tet 4/8 4/8 4/8 |
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O1 1/8 1/8 5/8 |
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O2 5/8 5/8 5/8 |
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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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Maghemite |
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Pecharroman C, Gonzalez-Carreno T, Iglesias J E |
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Physics and Chemistry of Minerals 22 (1995) 21-29 |
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The infrared dielectric properties of maghemite, gamma-Fe2O3, |
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from reflectance measurement on pressed powders |
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Sample: c) idealized, either one of Fe-oct 1-6, |
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or both Fe-oct 6-7 have zero occupancy |
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8.33 8.33 24.99 90 90 90 P4_32_12 |
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atom x y z occ |
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Fe-oct1 5/8 3/8 2/24 |
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Fe-oct2 1/8 5/8 0 |
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Fe-oct3 3/8 1/8 2/24 |
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Fe-oct4 1/8 7/8 2/24 |
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Fe-oct5 7/8 5/8 2/24 |
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Fe-oct6 3/8 3/8 0 0 |
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Fe-oct7 7/8 7/8 0 |
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Fe-tet1 4/8 6/8 1/24 |
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Fe-tet2 0 2/8 1/24 |
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Fe-tet3 2/8 4/8 3/24 |
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O1 1/8 1/8 2/24 |
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O2 5/8 5/8 2/24 |
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O3 5/8 3/8 0 |
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O4 3/8 1/8 0 |
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O5 5/8 7/8 0 |
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O6 1/8 7/8 0 |
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O7 5/8 1/8 2/24 |
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O8 3/8 3/8 2/24 |
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O9 3/8 7/8 2/24 |
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O10 7/8 3/8 2/24 |
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O11 7/8 7/8 2/24 |
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O12 1/8 5/8 2/24 |
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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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Maghemite |
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Greaves C |
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Journal of Solid State Chemistry 49 (1983) 325-333 |
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A powder neutron diffraction investigation of vacancy ordering and covalence in |
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gamma-Fe2O3 |
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Locality: synthetic |
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Sample: T = 4 K |
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8.3396 8.3396 8.3220 90 90 90 P4_32_12 |
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atom x y z occ Biso |
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Fe1 .744 .996 .120 .1 |
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Fe2 .620 .620 0 .1 |
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Fe3 .364 .867 -.016 .1 |
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Fe4 .140 .140 0 .333 .1 |
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O1 .615 .869 -.014 .1 |
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O2 .119 .377 -.005 .1 |
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O3 .137 .861 .007 .1 |
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O4 .383 .631 -.003 .1 |
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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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