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 P1400, x(Ti) in M1 = .485, P = 1.03 GPa _database_code_amcsd 0002081 9.7392 9.9539 3.7426 90 90 90 Bbmm atom x y z occ Biso Mg1 .8081 .25 0 .515 .55 Ti1 .8081 .25 0 .485 .55 Ti2 .1357 .4368 0 .7575 .54 Mg2 .1357 .4368 0 .2425 .54 O1 .2338 .25 0 1.03 O2 .0471 .8832 0 .87 O3 .3109 .9303 0 .86