Mn2Al4Si5O18 Knorr K, Meschke M, Winkler B Physics and Chemistry of Minerals 26 (1999) 521-529 Structural and magnetic properties of Co2Al4Si5O18 and Mn2Al4Si5O18 cordierite _database_code_amcsd 0008230 17.128 9.764 9.147 90 90 90 Cccm atom x y z Biso Mn .336 0 .25 1.1 AlT11 .25 .25 .262 .8 SiT16 0 .5 .25 .8 SiT21 .186 .086 0 .8 SiT23 .131 -.241 0 .8 AlT26 .045 .299 0 .8 O1 .2438 -.1054 .357 .92 O2 .0604 -.4066 .353 .92 O3 -.1773 -.3044 .358 .92 O4 .0416 -.2455 0 .92 O5 .1164 .188 0 .92 O6 .1649 -.076 0 .92