Na3.04 Nb7 O29 P4 Benabbas A, Leligny H, Borel M, Grandin A, Leclaire A, Raveau B Journal of Solid State Chemistry 101 (1992) 137-144 Na4-xNb7P4O29: A Phosphate Niobium Bronze Intergrowth of the Members M=3 snd M=4 of the MPTB's Series Nax(NbO3)2m(PO2)4 _cod_database_code 1001538 _database_code_amcsd 0013753 32.850 5.3484 13.252 90 97.79 90 C2/c atom x y z occ Nb1 0 0 0 Nb2 .3183 .5011 .02287 Nb3 .22724 .4785 .32190 Nb4 .04595 .4973 .17911 P1 .14822 .487 .1205 P2 .42169 .503 .1525 Na1 .1318 .507 .3634 Na2 -.0976 .009 -.0995 .52 O1 -.0468 -.025 .0780 O2 .0270 -.286 .0731 O3 .0299 .207 .1076 O4 .3791 .459 .0956 O5 .3066 .730 .1235 O6 .3024 .227 .0847 O7 .2710 .564 -.0695 O8 .3401 .278 -.0883 O9 .3482 .821 -.0378 O10 .1737 .562 .2216 O11 .2478 .291 .2264 O12 0 .515 .25 O13 .1029 .480 .1375 O14 .0722 .798 .2645 O15 .0755 .264 .3037