K4 Nb8 O34 P4 Si Leclaire A, Borel M, Chardon J, Grandin A, Raveau B Acta Crystallographica C48 (1992) 1744-1747 A niobium silicophosphate belonging to the niobium phosphate bronzeseries: K4Nb8P4SiO34 _cod_database_code 1001541 _database_code_amcsd 0010275 10.6050 10.6050 6.4099 90 90 90 P-4m2 atom x y z Nb1 .5 .1847 .2035 Nb2 .17750 .17750 0 Si1 .5 .5 0 P1 .2397 .2397 .5 K1 0 0 .5 K2 0 .5 .2923 K3 .5 .5 .5 O1 .5 0 .261 O2 .3638 .1747 .0215 O3 .3790 .2154 .4530 O4 .5 .3819 .145 O5 .1756 0 .032 O6 .1586 .1982 .3115