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 = 2.16 GPa _database_code_amcsd 0002075 9.6739 9.9651 3.7265 90 90 90 Bbmm atom x y z occ Biso Mg1 .8046 .25 0 .93 .51 Ti1 .8046 .25 0 .07 .51 Ti2 .1335 .4333 0 .965 .39 Mg2 .1335 .4333 0 .035 .39 O1 .2197 .25 0 .56 O2 .0466 .8861 0 .72 O3 .3142 .9377 0 .55