data_Sr2CdPb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.09
_cell_length_b   6.09
_cell_length_c   6.09
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sr2CdPb
_chemical_formula_sum   'Sr2 Cd1 Pb1'
_cell_volume   159.89
_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
  Sr  Sr2  1  0.0  0.0  0.0  1.0
  Sr  Sr3  1  0.15  0.15  0.15  1.0
  Cd  Cd0  1  0.31  0.31  0.31  1.0
  Pb  Pb1  1  0.46  0.46  0.46  1.0

data_Sr2CdPb
_symmetry_space_group_name_H-M   R3m
_cell_length_a   6.09
_cell_length_b   6.09
_cell_length_c   14.92
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   Sr2CdPb
_chemical_formula_sum   'Sr6 Cd3 Pb3'
_cell_volume   479.68
_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
  Sr  Sr0  3  0.0  0.0  0.0  1.0
  Sr  Sr1  3  0.0  0.0  0.85  1.0
  Cd  Cd2  3  0.0  0.0  0.69  1.0
  Pb  Pb3  3  0.0  0.0  0.54  1.0

Sr Sr Cd Pb
Sr2CdPb crystallizes in the trigonal R3m space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one Sr(2) and three equivalent Cd(1) atoms to form SrSrCd3 trigonal pyramids that share corners with six equivalent Sr(1)SrCd3 trigonal pyramids and edges with three equivalent Pb(1)Sr3Cd trigonal pyramids. The Sr(1)-Sr(2) bond length is 2.30 Å. All Sr(1)-Cd(1) bond lengths are 3.54 Å. In the second Sr site, Sr(2) is bonded in a distorted single-bond geometry to one Sr(1), one Cd(1), and three equivalent Pb(1) atoms. The Sr(2)-Cd(1) bond length is 2.30 Å. All Sr(2)-Pb(1) bond lengths are 3.54 Å. Cd(1) is bonded in a distorted linear geometry to one Sr(2), three equivalent Sr(1), and one Pb(1) atom. The Cd(1)-Pb(1) bond length is 2.30 Å. Pb(1) is bonded to three equivalent Sr(2) and one Cd(1) atom to form distorted PbSr3Cd trigonal pyramids that share corners with six equivalent Pb(1)Sr3Cd trigonal pyramids and edges with three equivalent Sr(1)SrCd3 trigonal pyramids.