Fe17 H4.272 Th2 Isnard O, Miraglia S, Soubeyroux J, Fruchart D, Deportes J, Buschow K Journal of Physics: Condensed Matter 5 (1993) 5481-5490 Structural study and magnetic characterization of Th2Fe17D5, Th2Fe17CxH5-x and Th2Fe17N3 _cod_database_code 1008604 _database_code_amcsd 0016495 8.7457 8.7457 12.65 90 90 120 R-3m atom x y z occ Th1 0 0 .3379 Fe1 0 0 .0979 Fe2 .5 0 .5 Fe3 .2836 0 0 Fe4 .5052 .4948 .1583 C1 .5 0 0 .208 H1 .5 0 0 .8 H2 .888 0 .5 .312