Qandilite Millard R L, Peterson R C, Hunter B K American Mineralogist 80 (1995) 885-896 Study of the cubic to tetragonal transition in Mg2TiO4 and Zn2TiO4 spinels by 17O MAS NMR and Rietveld refinement of X-ray diffraction data Sample: RLM446, Mg2TiO4 _database_code_amcsd 0001750 5.97705 5.97705 8.4161 90 90 90 P4_122 atom x y z occ Biso Mg .2518 .2518 .375 .34 Ti1 0 .2502 0 .074 .32 Mg1 0 .2502 0 .926 .32 Ti2 .5 .2391 0 .926 .34 Mg2 .5 .2391 0 .074 .34 O1 -.0264 .7368 .2526 .29 O2 .5188 .2610 .2329 .31