Cordierite
Armbruster T
American Mineralogist 71 (1986) 746-757
Role of Na in the structure of low-cordierite: A single-crystal X-ray study
Sample: from Alpe Sponda, Central Alps, Switzerland
_database_code_amcsd 0001017
17.060 9.759 9.322 90 90 90 Cccm
atom        x       y      z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
O11    .24614 -.10433 .35857      .0118  .0086  .0094 -.0005  .0029 -.0009
O16    .06196 -.41577 .34876      .0074  .0113  .0094 -.0008  .0000 -.0033
O13   -.17344 -.30866 .35804      .0100  .0105  .0095  .0016 -.0011 -.0026
O26    .04328 -.24612      0      .0059  .0163  .0196 -.0021      0      0
O21    .12039  .18225      0      .0119  .0127  .0187  .0058      0      0
O23    .16356 -.07844      0      .0136  .0065  .0192 -.0031      0      0
Al11      .25     .25 .25010 .92  .0083  .0068  .0078  .0012      0      0
Be11      .25     .25 .25010 .08  .0083  .0068  .0078  .0012      0      0
Si16        0      .5    .25      .0063  .0072  .0062      0      0      0
Si21   .19177  .07870      0      .0062  .0050  .0074  .0002      0      0
Si23  -.13562  .23649      0      .0056  .0058  .0076 -.0005      0      0
Al26   .05051  .30825      0      .0058  .0062  .0068  .0005      0      0
Mg     .33632       0    .25  .7  .0086  .0112  .0112  .0002      0      0
Fe     .33632       0    .25  .3  .0086  .0112  .0112  .0002      0      0
NaCh0       0       0      0 .25   .033   .022   .049  .0030      0      0
OHCh1       0       0    .25  .6   .109   .054   .054      0      0      0