Cordierite
Wallace J H, Wenk H R
American Mineralogist 65 (1980) 96-111
Structure variation in low cordierites
Note: sample sci 1104
Locality: SW Mte. Rosso, Bergell Alps, Switzerland
_database_code_amcsd 0000768
17.098 9.741 9.319 90 90 90 Cccm
atom       x       y      z  occ B(1,1) B(2,2) B(3,3)  B(1,2)  B(1,3)  B(2,3)
Mg1   .33735       0    .25 .581 .00028 .00118 .00174       0       0 0.00002
Fe1   .33735       0    .25 .366 .00028 .00118 .00174       0       0 0.00002
Al1      .25     .25 .25002 .969 .00043 .00128 .00110 0.00014       0       0
Si2        0      .5    .25 .881 .00035 .00128 .00097       0       0       0
Al2        0      .5    .25 .098 .00035 .00128 .00097       0       0       0
Si3   .19150 .078530      0 .967 .00031 .00090 .00096 0.00003       0       0
Si4   .13506 -.23592      0 .962 .00027 .00096 .00089 -.00011       0       0
Al5   .05024 .307510      0 .906 .00024 .00133 .00096 0.00009       0       0
Si5   .05024 .307510      0 .048 .00024 .00133 .00096 0.00009       0       0
O1    .24584 -.10367 .35849      .00083 .00175 .00187 0.00000 0.00038 -.00012
O2    .06148 -.41534 .34882      .00063 .00246 .00170 -.00017 0.00003 -.00067
O3   -.17319 -.30796 .35827      .00059 .00224 .00190 0.00019 -.00024 -.00047
O4    .04344 -.24735      0      .00052 .00358 .00415 -.00012       0       0
O5    .12149  .18412      0      .00088 .00261 .00366 0.00064       0       0
O6    .16373 -.07855      0      .00096 .00198 .00355 -.00034       0       0
OH1        0       0    .25  .65  .0280   .024   .017       0       0       0
OH2        0       0      0  .12  .0003   .003   .004       0       0       0