Rh6 Sn18.4 Tb4.6 Miraglia S, Hodeau J, de Bergevin F, Marezio M Acta Crystallographica B43 (1987) 76-83 Structural studies by electron and X-ray diffraction of the disordered phases II: (Sn1-xTbx)Tb4Rh6Sn18 and (Sn1-xDyx)Dy4Os6Sn18 _cod_database_code 1008323 _database_code_amcsd 0016238 13.772 13.772 13.772 90 90 90 Fm3m atom x y z occ Sn1 .5 .5 .5 .4 Tb1 .5 .5 .5 .6 Tb2 .1371 .1371 .1371 .5 Sn2 .0876 .0876 .0876 .5 Sn3 .1745 .1745 .5131 .5 Sn4 .25 .25 .25 Rh1 .2447 0 0