Pseudobrookite Yang H, Hazen R M American Mineralogist 84 (1999) 130-137 Comparative high-pressure crystal chemistry of karrooite, MgTi2O5, with different ordering states Sample P600, x(Ti) in M1 = .070, P = 7.51 GPa _database_code_amcsd 0002079 9.5754 9.8352 3.7029 90 90 90 Bbmm atom x y z occ Biso Mg1 .8040 .25 0 .93 .45 Ti1 .8040 .25 0 .07 .45 Ti2 .1337 .4334 0 .965 .42 Mg2 .1337 .4334 0 .035 .42 O1 .2215 .25 0 .65 O2 .0467 .8846 0 .69 O3 .3146 .9379 0 .50