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 = 6.20 GPa _database_code_amcsd 0002078 9.5992 9.8667 3.7085 90 90 90 Bbmm atom x y z occ Biso Mg1 .8039 .25 0 .93 .39 Ti1 .8039 .25 0 .07 .39 Ti2 .1336 .4333 0 .965 .36 Mg2 .1336 .4333 0 .035 .36 O1 .2210 .25 0 .71 O2 .0464 .8848 0 .60 O3 .3147 .9382 0 .50