data_global _amcsd_formula_title 'As2 K0.3 Sn2 Sr0.7' loop_ _publ_author_name 'Asbrand M' 'Eisenmann B' 'Klein J' _journal_name_full 'Zeitschrift fur Anorganische und Allgemeine Chemie' _journal_volume 621 _journal_year 1995 _journal_page_first 576 _journal_page_last 582 _publ_section_title ; Arsenidostannate mit Arsen-analogen (Sn As) - Schichten: Darstellung und Struktur von Na (Sn2 As2), Na0.3 Ca0.7 (Sn2 As2), Na0.4 Sr0.6 (Sn2As2), Na0.6 Ba0.4 (Sn2 As2) und K0.3 Sr0.7 (Sn2 As2) _cod_database_code 1008734 ; _database_code_amcsd 0016615 _chemical_formula_sum '(K.3 Sr.7) Sn2 As2' _cell_length_a 4.176 _cell_length_b 4.176 _cell_length_c 27.146 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 409.975 _exptl_crystal_density_diffrn 5.593 _symmetry_space_group_name_H-M 'R -3 m' loop_ _space_group_symop_operation_xyz 'x,y,z' '2/3+x,1/3+y,1/3+z' '1/3+x,2/3+y,2/3+z' 'x,x-y,z' '2/3+x,1/3+x-y,1/3+z' '1/3+x,2/3+x-y,2/3+z' 'y,x,-z' '2/3+y,1/3+x,1/3-z' '1/3+y,2/3+x,2/3-z' '-x+y,y,z' '2/3-x+y,1/3+y,1/3+z' '1/3-x+y,2/3+y,2/3+z' '-x,-x+y,-z' '2/3-x,1/3-x+y,1/3-z' '1/3-x,2/3-x+y,2/3-z' '-y,-x,z' '2/3-y,1/3-x,1/3+z' '1/3-y,2/3-x,2/3+z' 'x-y,-y,-z' '2/3+x-y,1/3-y,1/3-z' '1/3+x-y,2/3-y,2/3-z' 'y,-x+y,-z' '2/3+y,1/3-x+y,1/3-z' '1/3+y,2/3-x+y,2/3-z' '-x+y,-x,z' '2/3-x+y,1/3-x,1/3+z' '1/3-x+y,2/3-x,2/3+z' '-x,-y,-z' '2/3-x,1/3-y,1/3-z' '1/3-x,2/3-y,2/3-z' '-y,x-y,z' '2/3-y,1/3+x-y,1/3+z' '1/3-y,2/3+x-y,2/3+z' 'x-y,x,-z' '2/3+x-y,1/3+x,1/3-z' '1/3+x-y,2/3+x,2/3-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy K1 0.00000 0.00000 0.00000 0.30000 Sr1 0.00000 0.00000 0.00000 0.70000 Sn1 0.00000 0.00000 0.20840 1.00000 As1 0.00000 0.00000 0.40850 1.00000 loop_ _atom_site_aniso_label _atom_site_aniso_U_11 _atom_site_aniso_U_22 _atom_site_aniso_U_33 _atom_site_aniso_U_12 _atom_site_aniso_U_13 _atom_site_aniso_U_23 K1 0.00480 0.00480 0.00350 0.00240 0.00000 0.00000 Sr1 0.00480 0.00480 0.00350 0.00240 0.00000 0.00000 Sn1 0.00550 0.00550 0.00440 0.00270 0.00000 0.00000 As1 0.00490 0.00490 0.00570 0.00240 0.00000 0.00000