Ca0.504 Cs2 Nb6 O24 P3 Costentin G, Borel M, Grandin A, Leclaire A, Raveau B Journal of Solid State Chemistry 90 (1991) 279-284 A niobium phosphate with a tunnel structure: Ca0.5Cs2Nb6P3O24 _cod_database_code 1001859 _database_code_amcsd 0013695 13.3799 13.3799 10.3713 90 90 120 R32 atom x y z occ Cs1 .3587 .3353 .2211 .333 Nb1 .52097 .16219 .01378 P1 .22882 0 0 O1 .1486 .9776 .1159 O2 .1800 0 .5 O3 .3459 .1075 .0254 O4 .4746 0 0 O5 .6770 .2174 .0300 Ca1 0 0 0 .504