Na2.667 Nb6 O26 P4 Benabbas A, Borel M, Grandin A, Leclaire A, Raveau B Journal of Solid State Chemistry 95 (1991) 245-252 Na2+x Nb6 P4 O26 : a novel niobium phosphate bronze isotypic of the m=3 member of the MPTBp family _cod_database_code 1001698 _database_code_amcsd 0013722 19.80499 14.3859 5.3960 90 90 90 P2_12_12 atom x y z Nb1 0 0 .2640 Nb2 .33090 .97971 .2372 Nb3 .11669 .10021 .7647 Nb4 .43601 .09682 .7459 Nb5 .77765 .11139 .7414 P1 .2158 .1654 .264 P2 .5369 .1787 .253 P3 .8842 .1708 .2332 Na1 .0587 .2161 .242 Na2 .3779 .2060 .246 O1 .0642 .0530 .023 O2 -.0453 .1262 .271 O3 .0598 .0459 .517 O4 .2595 .0781 .273 O5 .3915 .0540 .474 O6 .2765 -.0931 .026 O7 .4030 .8874 .214 O8 .3714 .0546 -.022 O9 .2940 -.0832 .536 O10 .0626 .2218 .765 O11 .1737 .1721 .493 O12 .1686 .1680 .036 O13 .1849 .0094 .757 O14 .3910 .2242 .712 O15 .5 0 .780 O16 .4855 .1653 .054 O17 .5085 .1655 .514 O18 .7627 .2516 .725 O19 .8577 .1543 -.024 O20 .8400 .1315 .441