American Mineralogist Crystal Structure Database

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Gahnite
Download hom/gahnite.pdf
Halenius U, Bosi F
American Mineralogist 99 (2014) 261-266
Color of Mn-bearing gahnite: A first example of electronic transitions in heterovalent
exchange coupled IVMn2+-VIMn3+ pairs in minerals.
Locality: Kittelgruvan, Nordmark, Varmland, Sweden
_database_code_amcsd 0020092
8.1123 8.1123 8.1123 90 90 90 *Fd-3m
.125 .125 .125
atom      x      y      z  occ   Uiso U(1,1) U(2,2) U(3,3)  U(1,2)  U(1,3)  U(2,3)
ZnT    .125   .125   .125  .52 .00452 .00452 .00452 .00452       0       0       0
MgT    .125   .125   .125  .34 .00452 .00452 .00452 .00452       0       0       0
MnT    .125   .125   .125  .08 .00452 .00452 .00452 .00452       0       0       0
AlT    .125   .125   .125  .06 .00452 .00452 .00452 .00452       0       0       0
AlM      .5     .5     .5  .94 .00388 .00388 .00388 .00388 -.00035 -.00035 -.00035
MnM      .5     .5     .5  .03 .00388 .00388 .00388 .00388 -.00035 -.00035 -.00035
FeM      .5     .5     .5 .005 .00388 .00388 .00388 .00388 -.00035 -.00035 -.00035
MgM      .5     .5     .5  .02 .00388 .00388 .00388 .00388 -.00035 -.00035 -.00035
MnM      .5     .5     .5 .005 .00388 .00388 .00388 .00388 -.00035 -.00035 -.00035
O    .26404 .26404 .26404      .00415 .00415 .00415 .00415 -.00030 -.00030 -.00030
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