Cordierite
Hochella M F, Brown G E, Ross F K, Gibbs G V
American Mineralogist 64 (1979) 337-351
High-temperature crystal chemistry of hydrous Mg- and Fe-cordierite
White Well, T = 775 C
_database_code_amcsd 0000707
17.149 9.759 9.352 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)
Mg    .1626    .5   .25 .955 .00109 .00385 .00655       0       0  .00030
Fe    .1626    .5   .25 .045 .00109 .00385 .00655       0       0  .00030
Al11    .25   .25   .25      .00125 .00363 .00429  .00035       0       0
Si16      0    .5   .25      .00088 .00352 .00342       0       0       0
Si21  .1917 .0785     0      .00087 .00240 .00373  .00013       0       0
Al26  .0500 .3070     0      .00091 .00335 .00382  .00027       0       0
Si23 -.1347 .2363     0      .00086 .00273 .00340 -.00040       0       0
O11   .2468 .1042 .1398      .00217 .00414 .00450  .00016 -.00122 -.00095
O16   .0619 .4159 .1510      .00122 .00550 .00545  .00023 -.00073 -.00234
O13  -.1734 .3082 .1422      .00179 .00501 .00549 -.00055  .00095 -.00140
O21   .1216 .1843     0      .00165 .00615 .01206  .00217       0       0
O26  -.0438 .2484     0      .00122 .00883 .00875 -.00014       0       0
O23  -.1630 .0778     0      .00243 .00298 .00850 -.00155       0       0