Bridgmanite Kojitani H, Katsura T, Akaogi M Physics and Chemistry of Minerals 34 (2007) 257-267 Aluminum substitution mechanisms in perovskite-type MgSiO3: an investigation by Rietveld analysis Sample: Stoichiometric with xAl = 0.10 Locality: synthetic _database_code_amcsd 0009081 4.7767 4.9342 6.9130 90 90 90 Pbnm atom x y z occ Biso Mg .9727 .0462 .25 .95 .59 Al .9727 .0462 .25 .05 .59 Si 0 .5 0 .95 .34 Al 0 .5 0 .05 .34 O1 .1079 .4481 .25 .9 O2 .6955 .2978 .0570 .9