Fe17 N2.92 Pr2 Isnard O, Miraglia S, Soubeyroux J, Fruchart D, Pannetier J Physical Review B45 (1992) 2920-2926 Neutron powder diffraction study of Pr2Fe17 and Pr2Fe17N2.9 _cod_database_code 1008531 _database_code_amcsd 0016424 8.817 8.817 12.692 90 90 120 R-3m atom x y z occ Pr1 0 0 .3446 Fe1 0 0 .0948 Fe2 .5 0 .5 Fe3 .2827 0 0 Fe4 .5064 .4936 .1520 N1 .5 0 0 .973