American Mineralogist Crystal Structure Database

10 matching records for this search.

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,
from reflectance measurement on pressed powders
Sample: a) idealized
_database_code_amcsd 0007898
8.33 8.33 8.33 90 90 90 *Fd3m
.125 .125 .125
atom      x    y    z occ
Fe-oct   .5   .5   .5 5/6
Fe-tet .125 .125 .125
O       .25  .25  .25
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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,
from reflectance measurement on pressed powders
Sample: b) idealized
_database_code_amcsd 0007899
8.33 8.33 8.33 90 90 90 P4_132
atom      x   y   z occ
Fe-oct1 7/8 7/8 7/8 1/3
Fe-oct2 1/8 7/8 1/8
Fe-tet  4/8 4/8 4/8
O1      1/8 1/8 5/8
O2      5/8 5/8 5/8
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Maghemite
Download hom/maghemite.pdf
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,
from reflectance measurement on pressed powders
Sample: c) idealized, either one of Fe-oct 1-6,
or both Fe-oct 6-7 have zero occupancy
_database_code_amcsd 0007900
8.33 8.33 24.99 90 90 90 P4_32_12
atom      x   y    z occ
Fe-oct1 5/8 3/8 2/24
Fe-oct2 1/8 5/8    0
Fe-oct3 3/8 1/8 2/24
Fe-oct4 1/8 7/8 2/24
Fe-oct5 7/8 5/8 2/24
Fe-oct6 3/8 3/8    0   0
Fe-oct7 7/8 7/8    0
Fe-tet1 4/8 6/8 1/24
Fe-tet2   0 2/8 1/24
Fe-tet3 2/8 4/8 3/24
O1      1/8 1/8 2/24
O2      5/8 5/8 2/24
O3      5/8 3/8    0
O4      3/8 1/8    0
O5      5/8 7/8    0
O6      1/8 7/8    0
O7      5/8 1/8 2/24
O8      3/8 3/8 2/24
O9      3/8 7/8 2/24
O10     7/8 3/8 2/24
O11     7/8 7/8 2/24
O12     1/8 5/8 2/24
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Maghemite
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Shmakov A N, Kryukova G N, Tsybulya S V, Chuvilin A L, Solovyeva L P
 
Journal of Applied Crystallography 28 (1995) 141-145
Vacancy ordering in gamma-Fe2O3: synchrotron x-ray powder diffraction and high-
resolution electron microscopy studies
Locality: Synthetic
_database_code_amcsd 0020516
8.3474 8.3474 8.3474 90 90 90 P4_332
atom     x     y     z  occ Biso
Fe1  .9921 .9921 .9921       .45
Fe2  .8650 .6150  .875       .45
Fe3   .375  .125  .875 .335  .45
O1    .861  .861  .861       .45
O2    .372  .377  .876       .45
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Maghemite
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Solano E, Frontera C, Puig T, Obradors X, Ricart S, Ros J
 
Journal of Applied Crystallography 47 (2014) 414-420
Neutron and X-ray diffraction study of ferrite nanocrystals obtained by
microwave-assisted growth. A structural comparison with the
thermal synthetic route
Locality: Synthetic
_database_code_amcsd 0020517
8.3364 8.3364 8.3364 90 90 90 P4_332
atom      x      y      z occ
Fe1  -.0044 -.0044 -.0044
Fe2   .6250  .6250  .6250 .35
Fe3   .1250  .3669  .8831 .98
O1    .3817  .3817  .3817 .99
O2    .3817  .8736  .8819
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Maghemite
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Greaves C
 
Journal of Solid State Chemistry 49 (1983) 325-333
A powder neutron diffraction investigation of vacancy
ordering and covalence in gamma-Fe2O3
Locality: synthetic
Sample: T = 4 K
_database_code_amcsd 0013508
8.3396 8.3396 8.3220 90 90 90 P4_32_12
atom    x    y     z  occ Biso
Fe1  .744 .996  .120        .1
Fe2  .620 .620     0        .1
Fe3  .364 .867 -.016        .1
Fe4  .140 .140     0 .333   .1
O1   .615 .869 -.014        .1
O2   .119 .377 -.005        .1
O3   .137 .861  .007        .1
O4   .383 .631 -.003        .1
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Maghemite
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Jorgensen J E, Mosegaard L, Thomsen L E, Jensen T R, Hanson J C
 
Journal of Solid State Chemistry 180 (2007) 180-185
Formation of gamma-Fe2O3 nanoparticles and vacancy ordering: an in situ
X-ray powder diffraction study
Locality: Synthetic
_database_code_amcsd 0020585
8.4053 8.4053 8.4053 90 90 90 *Fd-3m
.125 .125 .125
atom     x     y     z  occ  Uiso
Fe1   .125  .125  .125 .865 .0144
Fe2     .5    .5    .5 .901 .0144
O    .2512 .2512 .2512      .0251
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Maghemite
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Shin HS
 
Journal of the Korean Ceramic Society 35 (1998) 1113-1119
A study on the structure of maghemite (gamma-Fe2O3)
I. Rietveld analysis of powder XRD patterns
Locality: Synthetic
_database_code_amcsd 0020518
8.3457 8.3457 8.3457 90 90 90 P4_332
atom      x      y      z occ Biso
Fe1    .625   .625   .625 .35  .50
Fe2  -.0044 -.0044 -.0044      .71
Fe3    .125  .3669 -.1169 .98  .71
O1    .3817  .3817  .3817 .99  .70
O2    .3817  .8736  .8819      .80
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Maghemite
Download hom/maghemite.pdf
Shin HS
 
Journal of the Korean Ceramic Society 35 (1998) 1113-1119
A study on the structure of maghemite (gamma-Fe2O3)
I. Rietveld analysis of powder XRD patterns
Locality: Synthetic
_database_code_amcsd 0020519
8.346 8.346 25.034 90 90 90 P4_32_12
atom     x     y      z occ Biso
Fe1  .1211 .1211      0      .57
Fe2  .6177 .6177      0 .97  .80
Fe3  .9903 .7448  .0401 .98  .60
Fe4  .4986 .2422  .0427 .98  .67
Fe5  .7527 .4939  .1242 .99  .81
Fe6  .3674 .8615  .0028 .99  .60
Fe7  .1288 .3818  .0823 .98  .81
Fe8  .8777 .1103  .0857 .99  .80
Fe9  .6216 .8611  .0860 .97  .81
O1   .1114 .3814 -.0024 .99  .59
O2   .8574 .1276 -.0004 .98  .58
O3   .6294 .3574  .0005      .59
O4   .6044 .8577  .0043 .96  .60
O5   .3646 .8716  .0790      .59
O6   .6179 .6291  .0801 .99  .60
O7   .8724 .8709  .0832 .99  .58
O8   .3510 .3981  .0833      .60
O9   .8804 .3770  .0853      .59
O10  .1054 .1538  .0853 .99  .59
O11  .1088 .6167  .0863      .59
O12  .6394 .1090  .0877 .95  .80
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Maghemite
Download hom/maghemite.pdf
Sinha K P, Sinha A P B
 
Zeitschrift fur Anorganische und Allgemeine Chemie 293 (1957) 228-232
Ein Fehlstellenuberstruktur - Modell fur gamma-Fe2O3
Locality: Synthetic
_database_code_amcsd 0020515
8.35 8.35 8.35 90 90 90 P-43m
atom    x    y    z occ
Fe1     0    0    0
Fe2    .5   .5   .5
Fe3     0   .5   .5
Fe4   .25  .25  .25
Fe5  .125 .125 .625
O1   .375 .375 .375
O2   .875 .875 .875
O3   .875 .875 .375
O4   .375 .375 .875
OH1  .625 .625 .625 .25
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View JMOL 3-D Structure (permalink)
 
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Total number of retrieved datasets: 10
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