Andalusite Burt J B, Ross N L, Angel R J, Koch M American Mineralogist 91 (2006) 319-326 Equations of state and structures of andalusite to 9.8 GPa and sillimanite to 8.5 GPa Locality: Minas Gerais, Brazil Sample: P = .0001 GPa _database_code_amcsd 0004114 7.7930 7.89734 5.55583 90 90 90 Pnnm atom x y z Biso Al1 0 0 .2418 .44 Al2 .3703 .13879 .5 .41 Si .2465 .25237 0 .40 OA .4224 .3638 .5 .43 OB .4254 .3619 0 .42 OC .1017 .4012 0 .73 OD .2292 .1341 .2388 .52