Cordierite Koepke J, Schulz H Physics and Chemistry of Minerals 13 (1986) 165-173 Single crystal structure investigations under high-pressure of the mineral cordierite with an improved high-pressure cell Sample: P = 2.2 GPa Locality: Zabargad island, Red Sea _database_code_amcsd 0007388 16.975 9.647 9.274 90 90 90 Cccm atom x y z Uiso Mg .1622 .5 .25 .0074 Al11 .25 .25 .2473 .0076 Si16 0 .5 .25 .0032 Si21 .1938 .0770 0 .0063 Al26 .0520 .3055 0 .0069 Si23 -.1348 .2369 0 .0011 O11 .2473 .1033 .1426 .0058 O16 .0625 .4152 .1502 .0065 O13 -.1734 .3127 .1414 .0055 O21 .1227 .1833 0 .0050 O26 -.0430 .2441 0 .0182 O23 -.1646 .0812 0 .0098