data_global _chemical_name_mineral 'Lollingite' loop_ _publ_author_name 'Kjekshus A' 'Peterzens P G' 'Rakke T' 'Andresen A F' _journal_name_full 'Acta Chemica Scandinavica' _journal_volume A33 _journal_year 1979 _journal_page_first 469 _journal_page_last 480 _publ_section_title ; Compounds with the marcasite type crystal structure. XIII. Structural and magnetic properties of CrtFe1-tAs2, CrtFe1-tSb2, Fe1-tNitAs2 and Fe1-tNitSb2 Sample: Fe.5Ni.5As2 ; _database_code_amcsd 0011956 _chemical_compound_source 'Synthetic' _chemical_formula_sum '(Fe.5 Ni.5) As2' _cell_length_a 5.1377 _cell_length_b 5.9205 _cell_length_c 3.1077 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 94.529 _exptl_crystal_density_diffrn 7.276 _symmetry_space_group_name_H-M 'P n n m' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2-y,1/2+z' '1/2-x,1/2+y,1/2-z' '1/2-x,1/2+y,1/2+z' '1/2+x,1/2-y,1/2-z' 'x,y,-z' '-x,-y,z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy Fe 0.00000 0.00000 0.00000 0.50000 Ni 0.00000 0.00000 0.00000 0.50000 As 0.18500 0.36620 0.00000 1.00000