Cordierite Wallace J H, Wenk H R American Mineralogist 65 (1980) 96-111 Structure variation in low cordierites Note: sample Brg 50 Locality: Alpe Lera Sura, Bergell Alps, Switzerland _database_code_amcsd 0000765 17.089 9.737 9.344 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 .883 .00025 .00112 .00160 0 0 -.00007 Fe1 .33734 0 .25 .090 .00025 .00112 .00160 0 0 -.00007 Al1 .25011 .25 .25010 .960 .00033 .00102 .00110 0.00017 0 0 Si2 0 .5 .25 .871 .00028 .00113 .00084 0 0 0 Al2 0 .5 .25 .097 .00028 .00113 .00084 0 0 0 Si3 .19236 .078030 0 .963 .00029 .00073 .00098 0 0 0 Si4 .13526 -.23704 0 .965 .00021 .00089 .00102 -.00006 0 0 Al5 .05077 .307950 0 .903 .00019 .00096 .00099 0.00008 0 0 Si5 .05077 .307950 0 .048 .00019 .00096 .00099 0.00008 0 0 O1 .24695 -.10317 .35876 .00082 .00171 .00169 -.00007 0.00025 -.00019 O2 .06199 -.41601 .34877 .00058 .00227 .00193 -.00010 0.00001 -.00067 O3 -.17335 -.30949 .35847 .00062 .00214 .00185 0.00022 -.00018 -.00043 O4 .04332 -.24787 0 .00058 .00338 .00388 -.00010 0 0 O5 .12217 .184140 0 .00090 .00230 .00374 0.00045 0 0 O6 .16438 -.07957 0 .00099 .00143 .00378 -.00031 0 0 OH1 0 0 .25 .600 .032 .024 .017 0 0 0 OH2 0 0 0 .110 .002 .006 .010 0.002 0 0