Nb27.2 O72 Tl8 Dupont L, Hervieu M, Pelloquin D, Nowogrocki G, Touboul M Journal of Solid State Chemistry 135 (1998) 282-292 Synthesis and crystal structure determination of Tl8 Nb27.2 O72 using TEM and single-crystal x-ray diffraction _cod_database_code 1004150 _database_code_amcsd 0013947 7.534 12.992 15.555 90 90 90 Im2m atom x y z occ Nb1 0 .5 .1221 Nb2 0 .4920 .3720 Nb3 .2538 .2408 .1288 Nb4 .2395 .7375 .1219 Nb5 0 .654 .5 .475 Nb6 0 .3285 0 .625 Nb7 0 .3254 .5 .5 O1 0 .768 .104 O2 0 .448 .246 O3 .187 .596 .141 O4 0 .503 0 O5 0 .771 .395 O6 .5 .010 0 O7 .202 .205 0 O8 0 .205 .148 O9 0 .204 .354 O10 .180 .381 .106 O11 .180 .381 .607 O12 .184 .595 .640 O13 .297 .705 0 O14 .215 .764 .252 Tl1 .074 -.007 .010 .06 Tl2 .029 -.040 .010 .08 Tl3 .028 .0302 .009 .11 Tl4 .067 -.013 .514 .06 Tl5 .024 -.0412 .508 .14 Tl6 .037 .026 .515 .05 Tl7 .034 -.036 .227 .05 Tl8 .020 -.018 .266 .09 Tl9 -.037 .0110 .2516 .36