data_global _chemical_name_mineral 'Sederholmite' loop_ _publ_author_name 'Rost E' 'Vestersjo E' _journal_name_full 'Acta Chemica Scandinavica' _journal_volume 22 _journal_year 1968 _journal_page_first 2118 _journal_page_last 2134 _publ_section_title ; On the system Ni-Se-Te Note: Phase F, sample 84 ; _database_code_amcsd 0011905 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'Ni.984 Se.816 Te.2' _cell_length_a 3.722 _cell_length_b 3.722 _cell_length_c 5.350 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 64.186 _exptl_crystal_density_diffrn 7.642 _symmetry_space_group_name_H-M 'P 63/m m c' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x,-x+y,1/2+z' 'x,x-y,1/2-z' '-x+y,-x,1/2-z' 'x-y,x,1/2+z' '-y,-x,z' 'y,x,-z' 'y,-x+y,-z' '-y,x-y,z' 'x-y,-y,1/2+z' '-x+y,y,1/2-z' 'x,y,1/2-z' '-x,-y,1/2+z' 'x,x-y,z' '-x,-x+y,-z' 'x-y,x,-z' '-x+y,-x,z' 'y,x,1/2+z' '-y,-x,1/2-z' '-y,x-y,1/2-z' 'y,-x+y,1/2+z' '-x+y,y,z' 'x-y,-y,-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy Ni 0.00000 0.00000 0.00000 0.98400 Se 0.00000 0.00000 0.00000 0.01600 Se 0.33333 0.66667 0.25000 0.80000 Te 0.33333 0.66667 0.25000 0.20000