Nb Se3 Hodeau J, Marezio M, Roucau C, Ayroles R, Meerschaut A, Rouxel J, Monceau P Journal of Physics C: Solid State Physics 11 (1978) 4117-4134 Charge density waves in Nb Se3 at 145 K: Crystal structures x-ray and electron diffraction studies _cod_database_code 1009037 _database_code_amcsd 0016898 10.009 3.4805 15.629 90 109.47 90 P2_1/m atom x y z Nb1 .6532 .25 .1185 Nb2 .3162 .75 .2059 Nb3 .2942 .25 .4613 Se1 .4421 .75 .0665 Se2 .8344 .75 .0877 Se3 .8035 .75 .2390 Se4 .1644 .25 .0869 Se5 .1788 .25 .2759 Se6 .5273 .25 .2488 Se7 .0826 .75 .4246 Se8 .4441 .75 .4054 Se9 .2443 .75 .5755