data_K2AgPb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.9
_cell_length_b   5.15
_cell_length_c   6.9
_cell_angle_alpha   90.0
_cell_angle_beta   109.64
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2AgPb
_chemical_formula_sum   'K2 Ag1 Pb1'
_cell_volume   163.97
_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  0.93  0.57  0.07  1.0
  K  K2  1  0.85  0.0  0.13  1.0
  Ag  Ag0  1  0.38  0.0  0.64  1.0
  Pb  Pb3  1  0.39  0.57  0.4  1.0

data_K2AgPb
_symmetry_space_group_name_H-M   P1
_cell_length_a   4.9
_cell_length_b   5.15
_cell_length_c   6.9
_cell_angle_alpha   90.0
_cell_angle_beta   109.64
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2AgPb
_chemical_formula_sum   'K2 Ag1 Pb1'
_cell_volume   163.97
_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  K0  1  0.85  0.0  0.13  1.0
  K  K1  1  0.93  0.57  0.07  1.0
  Ag  Ag2  1  0.38  0.0  0.64  1.0
  Pb  Pb3  1  0.39  0.57  0.4  1.0

K K Ag Pb
K K Ag Pb 0 1 o + o 0 3 + o o 1 2 o o - 2 3 o - o 2 3 o o o 
K2AgPb crystallizes in the triclinic P1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a distorted single-bond geometry to two equivalent K(2), one Ag(1), and one Pb(1) atom. There is one shorter (2.30 Å) and one longer (3.03 Å) K(1)-K(2) bond length. The K(1)-Ag(1) bond length is 3.92 Å. The K(1)-Pb(1) bond length is 2.63 Å. In the second K site, K(2) is bonded in a 7-coordinate geometry to two equivalent K(1), two equivalent Ag(1), and three equivalent Pb(1) atoms. There is one shorter (3.37 Å) and one longer (3.63 Å) K(2)-Ag(1) bond length. There are a spread of K(2)-Pb(1) bond distances ranging from 3.49-4.01 Å. Ag(1) is bonded in a 5-coordinate geometry to one K(1), two equivalent K(2), and two equivalent Pb(1) atoms. There is one shorter (2.76 Å) and one longer (3.40 Å) Ag(1)-Pb(1) bond length. Pb(1) is bonded in a 1-coordinate geometry to one K(1), three equivalent K(2), and two equivalent Ag(1) atoms.