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 = 3.22 GPa _database_code_amcsd 0002083 9.6949 9.9022 3.7313 90 90 90 Bbmm atom x y z occ Biso Mg1 .8078 .25 0 .515 .51 Ti1 .8078 .25 0 .485 .51 Ti2 .1358 .4368 0 .7575 .57 Mg2 .1358 .4368 0 .2425 .57 O1 .2342 .25 0 1.14 O2 .0473 .8827 0 .94 O3 .3125 .9312 0 .80