Nb Se3 van Smaalen S, de Boer J, Meetsma A, Graafsma H, Sheu H, Darovskikh A, Coppens P, Levy F Physical Review B45 (1992) 3103-3106 Determination of the structural distortions corresponding to the q1- and q2-type modulations in niobium triselenide Nb Se3 _cod_database_code 1008952 _database_code_amcsd 0016818 9.974 3.476 15.592 90 109.4 90 P2_1/m atom x y z Nb1 .3858 .25 .7326 Nb2 .2615 .75 -.0552 Nb3 .3780 .25 .0837 Se1 .2539 .75 .8132 Se2 .4601 .75 .6267 Se3 .5212 .75 .7174 Se4 .1260 .25 -.0393 Se5 .2273 .25 .0491 Se6 .3881 .25 .8603 Se7 .2534 .75 .1716 Se8 .4246 .75 -.0195 Se9 .4099 .75 .1658