K4 Nb8 O34 P5 Benabbas A, Borel M, Grandin A, Leclaire A, Raveau B Journal of Solid State Chemistry 87 (1990) 360-365 The niobium phosphate bronze K5-xNb8P5O34, a new tunnel structure, first member of the series (K3Nb6P4O26)n . KNb2PO8 _cod_database_code 1001449 _database_code_amcsd 0013681 13.904 6.453 20.64 90 125.05 90 P2/c atom x y z occ Nb1 .16613 .98280 .05406 Nb2 .24102 .99468 .26477 Nb3 .53830 .77407 .35353 Nb4 .74862 .77185 .56941 P1 0 .1529 .25 P2 .22103 .4980 .05104 P3 .30488 .4971 .31915 K1 .5 .2743 .25 K2 .4396 .7474 .5162 .5 K3 .0092 .6430 .1360 .45 K4 .0444 .504 .1279 .32 K5 .0571 .6856 .3357 .23 O1 0 0 0 O2 .1895 -.0175 .1619 O3 .3447 -.0349 .1235 O4 .1734 -.0525 -.0330 O5 .1732 .2900 .0573 O6 .1544 .6721 .0618 O7 .4083 -.0397 .3165 O8 .2768 .0353 .3778 O9 .0728 .0114 .2331 O10 .2509 .3056 .2636 O11 .2255 .6871 .2733 O12 .6055 .7849 .4697 O13 .4290 .5329 .3404 O14 .6475 .5147 .3830 O15 .5 .7214 .25 O16 .6910 .5382 .6059 O17 .8020 .5173 .5308 O18 .9181 .7127 .6770