data_global _amcsd_formula_title 'SrFe2As2' loop_ _publ_author_name 'Tegel M' 'Rotter M' 'Weiss V' 'Schappacher F M' 'Pottgen R' 'Johrendt D' _journal_name_full 'Journal of Physics: Condensed Matter' _journal_volume 20 _journal_year 2008 _journal_page_first 452201_1 _journal_page_last 452201_5 _publ_section_title ; Structural and magnetic phase transitions in the ternary iron arsenides SrFe2As2 and EuFe2As2 Note: T = 90 K ; _database_code_amcsd 0018355 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'Sr Fe2 As2' _cell_length_a 5.5783 _cell_length_b 5.5175 _cell_length_c 12.2965 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 378.465 _exptl_crystal_density_diffrn 6.128 _symmetry_space_group_name_H-M 'F m m m' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,1/2+y,1/2+z' '1/2+x,y,1/2+z' '1/2+x,1/2+y,z' 'x,-y,z' 'x,1/2-y,1/2+z' '1/2+x,-y,1/2+z' '1/2+x,1/2-y,z' '-x,y,-z' '-x,1/2+y,1/2-z' '1/2-x,y,1/2-z' '1/2-x,1/2+y,-z' '-x,y,z' '-x,1/2+y,1/2+z' '1/2-x,y,1/2+z' '1/2-x,1/2+y,z' 'x,-y,-z' 'x,1/2-y,1/2-z' '1/2+x,-y,1/2-z' '1/2+x,1/2-y,-z' 'x,y,-z' 'x,1/2+y,1/2-z' '1/2+x,y,1/2-z' '1/2+x,1/2+y,-z' '-x,-y,z' '-x,1/2-y,1/2+z' '1/2-x,-y,1/2+z' '1/2-x,1/2-y,z' '-x,-y,-z' '-x,1/2-y,1/2-z' '1/2-x,-y,1/2-z' '1/2-x,1/2-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Sr 0.00000 0.00000 0.00000 0.01800 Fe 0.25000 0.25000 0.25000 0.00600 As 0.00000 0.00000 0.36120 0.00600