Andradite
Armbruster T
European Journal of Mineralogy 7 (1995) 1221-1225
Structure refinement of hydrous andradite,
Ca3Fe1.54Mn0.02Al0.26(SiO4)1.65(O4H4)1.35, from the Wessels mine,
Kalahari manganese field, South Africa
Note: reported coordinates of Ca and Y-site made no sense, they have been changed
Locality: Wessels mine, Kalahari manganese field, South Africa
_database_code_amcsd 0006606
12.340 12.340 12.340 90 90 90 Ia-3d
atom     x      y     z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Ca       0    .25  .125      .0173  .0173  .0145  .0063      0      0
FeY      0      0     0 .77  .0158  .0158  .0158 -.0027 -.0027 -.0027
MnY      0      0     0 .10  .0158  .0158  .0158 -.0027 -.0027 -.0027
AlY      0      0     0 .13  .0158  .0158  .0158 -.0027 -.0027 -.0027
SiZ    3/8      0   1/4 .55   .012  .0133  .0133      0      0      0
O    .4642 -.0518 .1512 .55   .033   .022   .022 -.0066 -.0111  .0057
OH   .4642 -.0518 .1512 .45   .033   .022   .022 -.0066 -.0111  .0057