Cordierite
Wallace J H, Wenk H R
American Mineralogist 65 (1980) 96-111
Structure variation in low cordierites
Note: sample sci 1018
Locality: Vallun Trubinasca, Bergell Alps, Switzerland
_database_code_amcsd 0000767
17.114 9.761 9.333 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   .33734       0    .25 .626 .00037 .00125 .00187       0       0 -.00001
Fe1   .33734       0    .25 .626 .00037 .00125 .00187       0       0 -.00001
Al1      .25     .25 .25011 .970 .00048 .00124 .00110 0.00016       0       0
Si2        0      .5    .25 .884 .00030 .00142 .00094       0       0       0
Al2        0      .5    .25 .098 .00030 .00142 .00094       0       0       0
Si3   .19170 .078390      0 .966 .00030 .00085 .00104 0.00003       0       0
Si4   .13508 -.23636      0 .960 .00028 .00093 .00096 -.00008       0       0
Al4   .05046 .307770      0 .899 .00024 .00099 .00097 0.00006       0       0
Si5   .05046 .307770      0 .047 .00024 .00099 .00097 0.00006       0       0
O1    .24623 -.10370 .35868      .00083 .00171 .00176 -.00008 0.00037 -.00019
O2    .06172 -.41580 .34874      .00059 .00239 .00184 -.00012 0.00006 -.00075
O3   -.17323 -.30846 .35841      .00067 .00221 .00171 0.00013 -.00025 -.00046
O4    .04332 -.24703      0      .00044 .00365 .00384 -.00018       0       0
O5    .12135 .183910      0      .00087 .00263 .00375 0.00077       0       0
O6    .16390 -.07889      0      .00102 .00136 .00398 -.00043       0       0
OH1        0       0   .25   .42  .0059  .0160  .0082       0       0       0
OH2        0       0     0   .16  .0001  .0026  .0110  -.0005       0       0