Titanite Liferovich R P, Mitchell R H Physics and Chemistry of Minerals 33 (2006) 73-83 Tantalum-bearing titanite: synthesis and crystal structure data Locality: synthetic Sample: NaTa2 _database_code_amcsd 0009021 7.1122 8.7166 6.5962 90 114.078 90 A2/a atom x y z occ Biso Ca .25 .1693 0 .8 1.22 Na .25 .1693 0 .2 1.22 Ti .5 0 .5 .8 .56 Ta .5 0 .5 .2 .56 Si .75 .1809 0 .71 O1 .75 .0661 .5 .77 O2 .9036 .0669 .1822 .77 O3 .3836 .2148 .4039 .77