data_global _amcsd_formula_title 'As2 Np' loop_ _publ_author_name 'Delapalme A' 'Mulak J' 'Blaise A' 'Fournier J' _journal_name_full 'Journal of Magnetism and Magnetic Materials' _journal_volume 30 _journal_year 1982 _journal_page_first 117 _journal_page_last 121 _publ_section_title ; Np As2: Magnetic form factors and tentative crystal field model _cod_database_code 1008990 ; _database_code_amcsd 0016853 _chemical_formula_sum 'Np As2' _cell_length_a 3.930 _cell_length_b 3.93 _cell_length_c 8.137 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 125.675 _exptl_crystal_density_diffrn 10.223 _symmetry_space_group_name_H-M 'P 4/n m m' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2-y,1/2-x,z' 'y,x,-z' 'y,-x,-z' '1/2-y,1/2+x,z' 'x,-y,z' '1/2-x,1/2+y,-z' '1/2+x,1/2+y,-z' '-x,-y,z' '1/2+y,1/2+x,z' '-y,-x,-z' '-y,x,-z' '1/2+y,1/2-x,z' '-x,y,z' '1/2+x,1/2-y,-z' '1/2-x,1/2-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Np1 0.00000 0.50000 0.28100 As1 0.00000 0.00000 0.00000 As2 0.00000 0.50000 0.63900