Geikielite Liferovich R P, Mitchell R H Physics and Chemistry of Minerals 32 (2005) 442-449 Rhombohedral ilmenite group nickel titanates with Zn, Mg, and Mn: synthesis and crystal structures _database_code_amcsd 0008981 5.0418 5.0418 13.8494 90 90 120 R-3 atom x y z occ Biso NiA 0 0 .3518 .5 .44 MgA 0 0 .3518 .5 .44 TiB 0 0 .1448 .26 O1 .3183 .0192 .2460 .33