data_KCa4Pb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.15
_cell_length_b   7.15
_cell_length_c   7.15
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   KCa4Pb
_chemical_formula_sum   'K1 Ca4 Pb1'
_cell_volume   258.21
_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  K4  1  0.0  0.0  0.0  1.0
  Ca  Ca0  1  0.81  0.81  0.3  1.0
  Ca  Ca1  1  0.81  0.3  0.81  1.0
  Ca  Ca2  1  0.3  0.81  0.81  1.0
  Ca  Ca3  1  0.3  0.3  0.3  1.0
  Pb  Pb5  1  0.53  0.53  0.53  1.0

data_KCa4Pb
_symmetry_space_group_name_H-M   R3m
_cell_length_a   7.15
_cell_length_b   7.15
_cell_length_c   17.51
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   KCa4Pb
_chemical_formula_sum   'K3 Ca12 Pb3'
_cell_volume   774.64
_cell_formula_units_Z   3
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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  3  0.0  0.0  0.0  1.0
  Ca  Ca1  9  0.0  0.5  0.7  1.0
  Ca  Ca2  3  0.0  0.0  0.7  1.0
  Pb  Pb3  3  0.0  0.0  0.47  1.0

K Ca Ca Ca Ca Pb
KCa4Pb crystallizes in the trigonal R3m space group. K(1) is bonded in a trigonal non-coplanar geometry to three equivalent Ca(1) atoms. All K(1)-Ca(1) bond lengths are 2.12 Å. There are two inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a bent 150 degrees geometry to one K(1), two equivalent Ca(2), and one Pb(1) atom. Both Ca(1)-Ca(2) bond lengths are 3.57 Å. The Ca(1)-Pb(1) bond length is 2.84 Å. In the second Ca site, Ca(2) is bonded in a 7-coordinate geometry to six equivalent Ca(1) and one Pb(1) atom. The Ca(2)-Pb(1) bond length is 3.92 Å. Pb(1) is bonded in a 3-coordinate geometry to one Ca(2) and three equivalent Ca(1) atoms.