Ba2Ti3Nb4O18 Gasperin M Acta Crystallographica C40 (1984) 9-11 Syntheses and Structure of a New Titanoniobate: The Trititanotetraniobate of Dibarium, Ba2Ti3Nb4O18 _cod_database_code 1001269 _database_code_amcsd 0009989 10.000 9.959 7.315 90 111.29 90 P2_1/c atom x y z occ Ba1 .20448 .08876 .06374 Nb1 .10467 .75127 .35107 Ti1 0 .5 0 Nb2 .5182 .2697 .5095 .5 Ti2 .5182 .2697 .5095 .5 Nb3 .3795 .0151 .6055 .5 Ti3 .3795 .0151 .6055 .5 O1 .4047 .0907 .8515 O2 .5814 .084 .6211 O3 .8074 .0709 .4761 O4 .9843 .0883 .2516 O5 .0697 .1617 .6458 O6 .3237 .1719 .4633 O7 .5096 .1626 .2545 O8 .7001 .1740 .0459 O9 .8990 .1688 .8755