data_K2AgPb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.75
_cell_length_b   11.75
_cell_length_c   11.75
_cell_angle_alpha   19.18
_cell_angle_beta   19.18
_cell_angle_gamma   19.18
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2AgPb
_chemical_formula_sum   'K2 Ag1 Pb1'
_cell_volume   152.79
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  K  K1  1  0.0  0.0  0.65  1.0
  K  K2  1  0.0  0.0  0.93  1.0
  Ag  Ag0  1  0.0  0.0  0.0  1.0
  Pb  Pb3  1  0.0  0.0  0.29  1.0

data_K2AgPb
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.78
_cell_length_b   3.91
_cell_length_c   11.75
_cell_angle_alpha   90.0
_cell_angle_beta   101.09
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   K2AgPb
_chemical_formula_sum   'K4 Ag2 Pb2'
_cell_volume   305.58
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  K  K0  2  0.0  0.0  0.07  1.0
  K  K1  2  0.0  0.0  0.35  1.0
  Ag  Ag2  2  0.0  0.0  0.0  1.0
  Pb  Pb3  2  0.0  0.0  0.71  1.0

K K Ag Pb
K2AgPb crystallizes in the monoclinic Cm space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to one K(2), six equivalent K(1), and one Pb(1) atom. The K(1)-K(2) bond length is 3.25 Å. All K(1)-K(1) bond lengths are 3.91 Å. The K(1)-Pb(1) bond length is 4.25 Å. In the second K site, K(2) is bonded in a single-bond geometry to one K(1) and one Ag(1) atom. The K(2)-Ag(1) bond length is 0.86 Å. Ag(1) is bonded in a single-bond geometry to one K(2) and one Pb(1) atom. The Ag(1)-Pb(1) bond length is 3.39 Å. Pb(1) is bonded in a distorted single-bond geometry to one K(1) and one Ag(1) atom.