Cordierite Geiger C A, Armbruster T, Khomenko V, Quartieri S American Mineralogist 85 (2000) 1255-1264 Cordierite I: The coordination of Fe2+ Sample: 42/IA _database_code_amcsd 0002494 17.069 9.725 9.347 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) Si21 .30750 .07774 0 .00472 .00409 .0052 -.00028 0 0 Si16 0 0 .25 .0047 .0063 .0047 0 0 0 Si23 .36487 .23734 .5 .00417 .0050 .0054 -.00073 0 0 Al26 .05089 .19218 0 .0042 .0055 .0053 -.00066 0 0 Al11 .25 .25 .25025 .0069 .0053 .0057 -.00143 0 0 MgM .16262 0 .25 .918 .0055 .0061 .0079 0 0 .00004 FeM .16262 0 .25 .082 .0055 .0061 .0079 0 0 .00004 NaCH0 .5 0 .5 .07 .02378 .02869 .04720 .00059 0 0 OCH1 .5 0 .25 .31 OCH2 .446 0 .25 .14 O16 .06224 .08396 .15096 .0067 .0098 .0074 -.0013 .0001 .0036 O11 .25279 .10285 .14133 .0103 .0072 .0072 -.0007 .0033 -.0009 O13 .32678 .31029 .64167 .0084 .0093 .0076 -.0014 .0017 -.0023 O21 .37769 .1844 0 .0097 .0102 .0153 -.0056 0 0 O26 .45701 .2475 .5 .0050 .0159 .0158 -.0020 0 0 O23 .33551 -.07960 0 .0132 .0049 .0161 .0029 0 0