La.67Nb2O6 Mishchuk D O, V'yunov O I, Ovchar O V, Belous A G Inorganic Materials 40 (2004) 1324-1330 Structural and dielectric properties of solid solutions of sodium niobate in lanthanum and neodymium niobates Locality: synthetic Note: La2/3-x Na3x Nb2O6 synthesized at 1350 deg C Note: x = 0 _database_code_amcsd 0018675 3.9105 3.9197 7.9142 90 90 90 Pmmm atom x y z occ La 0 0 0 .67 Nb .5 .5 .2618 O1 .5 .5 0 O2 .5 .5 .5 O3 .5 0 .267 O4 0 .5 .223