Ba0.84 Nb8 O34 P5 Rb3 Gueho C, Borel M, Grandin A, Leclaire A, Raveau B Acta Crystallographica C48 (1992) 2066-2067 Structure of Ba0.84Rb3Nb8P5O34 _cod_database_code 1001535 _database_code_amcsd 0010278 10.6604 10.6604 6.4434 90 90 90 P-4m2 atom x y z occ Ba1 .5 .5 .5 .84 Rb1 0 0 .5 Rb2 0 .5 .2912 Nb1 .5 .1804 .1991 Nb2 .17662 .17662 0 P1 .5 .5 0 P2 .2423 .2423 .5 O1 .5 0 .256 O2 .3658 .1746 .025 O3 .3811 .2211 .451 O4 .5 .384 .143 O5 .178 0 .032 O6 .1611 .2017 .313