data_1008873
_chemical_name_systematic
;
Tetrasodium hexapotassium di-$-mue-arsenido-bis(diarsenidostannate)
;
_chemical_formula_structural       'Na4 K6 (As2 (Sn As2)2)'
_chemical_formula_sum              'As6 K6 Na4 Sn2'
_publ_section_title
;
Dimere Zintl-Anionen (Sn2 As6)10- und (Sn2 Sb6)10- in Alkaliverbindungen
;
loop_
_publ_author_name
  'Eisenmann, B'
  'Klein, J'
_journal_name_full
;
Zeitschrift fuer Kristallographie (149,1979-)
;
_journal_coden_ASTM                ZEKRDZ
_journal_volume                    196
_journal_year                      1991
_journal_page_first                213
_journal_page_last                 229
_cell_length_a                     20.435(9)
_cell_length_b                     6.820(3)
_cell_length_c                     15.351(5)
_cell_angle_alpha                  90
_cell_angle_beta                   90
_cell_angle_gamma                  90
_cell_volume                       2139.4
_cell_formula_units_Z              4
_exptl_crystal_density_meas        3.15
_symmetry_space_group_name_H-M     'C m c a'
_symmetry_Int_Tables_number        64
_symmetry_cell_setting             orthorhombic
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  'x,-y,-z'
  'x,1/2-y,1/2+z'
  'x,1/2+y,1/2-z'
  '-x,-y,-z'
  '-x,y,z'
  '-x,1/2+y,1/2-z'
  '-x,1/2-y,1/2+z'
  '1/2+x,1/2+y,z'
  '1/2+x,1/2-y,-z'
  '1/2+x,-y,1/2+z'
  '1/2+x,y,1/2-z'
  '1/2-x,1/2-y,-z'
  '1/2-x,1/2+y,z'
  '1/2-x,y,1/2-z'
  '1/2-x,-y,1/2+z'
loop_
_atom_type_symbol
_atom_type_oxidation_number
  Sn4+   4.000
  As3-  -3.000
  Na1+   1.000
  K1+    1.000
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_symmetry_multiplicity
_atom_site_Wyckoff_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_attached_hydrogens
_atom_site_calc_flag
  Sn1   Sn4+   8 d 0.4117 0. 0. 1.  0 d
  As1   As3-   8 f 0. 0.2036(2) 0.5949(1) 1.  0 d
  As2   As3-  16 g 0.3419 0.2786(1) 0.6057(1) 1.  0 d
  Na1   Na1+   8 d 0.0808(3) 0. 0. 1.  0 d
  Na2   Na1+   8 d 0.2446(3) 0. 0. 1.  0 d
  K1    K1+    8 f 0. 0.2604(5) 0.3203(2) 1.  0 d
  K2    K1+   16 g 0.6660(1) 0.7307(3) 0.1758(1) 1.  0 d
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_22
_atom_site_aniso_U_23
_atom_site_aniso_U_33
  Sn1   0.0103(3) 0. 0. 0.0104(3) 0.0002(3) 0.0107(3)
  As1   0.0123(5) 0. 0. 0.0142(5) -0.0025(4) 0.0151(5)
  As2   0.0146(3) -0.0010(3) 0.0018(3) 0.0144(4) 0.0025(3) 0.0145(3)
  Na1   0.0241(24) 0. 0. 0.0137(20) 0.0004(20) 0.0249(23)
  Na2   0.0217(23) 0. 0. 0.0256(25) -0.0045(21) 0.0231(23)
  K1    0.0250(13) 0. 0. 0.0381(17) 0.0061(13) 0.0301(15)
  K2    0.0392(11) 0.002(1) -0.0018(8) 0.0293(10) 0.0026(8) 0.0231(9)
_refine_ls_R_factor_all            0.072