Andalusite Taylor W Zeitschrift fur Kristallographie 71 (1929) 205-218 The Structure of Andalusite, Al2 Si O5 _cod_database_code 1010924 _database_code_amcsd 0017647 7.76 7.90 5.56 90 90 90 Pnnm atom x y z O1 .08 -.14 0 O2 .04 -.17 .5 O3 .14 .4 0 O4 .21 .14 .25 Si1 .28 .25 0 Al1 0 0 .25 Al2 -.14 .36 0