data_1008467
_chemical_name_systematic          'Tetrasodium potassium triarsenidogermanate'
_chemical_formula_structural       'Na4 K Ge As3'
_chemical_formula_sum              'As3 Ge K Na4'
_publ_section_title
;
Crystal structure of tetrasodium monopotassium triarsenidogermanate
;
loop_
_publ_author_name
  'Eisenmann, B'
  'Klein, J'
_journal_name_full
;
Zeitschrift fuer Kristallographie (149,1979-)
;
_journal_coden_ASTM                ZEKRDZ
_journal_volume                    197
_journal_year                      1991
_journal_page_first                279
_journal_page_last                 280
_cell_length_a                     15.161(4)
_cell_length_b                     4.813(2)
_cell_length_c                     13.168(4)
_cell_angle_alpha                  90.(0)
_cell_angle_beta                   90.(0)
_cell_angle_gamma                  90.(0)
_cell_volume                       960.9
_cell_formula_units_Z              4
_symmetry_space_group_name_H-M     'P n m a'
_symmetry_Int_Tables_number        62
_symmetry_cell_setting             orthorhombic
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '1/2+x,1/2-y,1/2-z'
  '-x,1/2+y,-z'
  '1/2-x,-y,1/2+z'
  '-x,-y,-z'
  '1/2-x,1/2+y,1/2+z'
  'x,1/2-y,z'
  '1/2+x,y,1/2-z'
loop_
_atom_type_symbol
_atom_type_oxidation_number
  Na1+   1.000
  K1+    1.000
  Ge4+   4.000
  As3-  -3.000
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
  Na1   Na1+   4 c 0.56259(40) 0.25 0.42758(50) 1.  0 d
  Na2   Na1+   4 c 0.08151(40) 0.25 0.81112(50) 1.  0 d
  Na3   Na1+   4 c 0.25545(50) 0.25 0.23703(50) 1.  0 d
  Na4   Na1+   4 c 0.28882(40) 0.25 0.93931(50) 1.  0 d
  K1    K1+    4 c 0.51596(20) 0.25 0.12875(30) 1.  0 d
  Ge1   Ge4+   4 c 0.29408(10) 0.25 0.5845(1) 1.  0 d
  As1   As3-   4 c 0.14053(10) 0.25 0.59227(10) 1.  0 d
  As2   As3-   4 c 0.36491(10) 0.25 0.4258(1) 1.  0 d
  As3   As3-   4 c 0.38283(10) 0.25 0.73054(10) 1.  0 d
_refine_ls_R_factor_all            0.056