data_TaCoOsPb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.56
_cell_length_b   4.56
_cell_length_c   4.56
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TaCoOsPb
_chemical_formula_sum   'Ta1 Co1 Os1 Pb1'
_cell_volume   66.99
_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
  Ta  Ta3  1  0.22  0.22  0.22  1.0
  Co  Co0  1  0.0  0.0  0.0  1.0
  Os  Os1  1  0.84  0.84  0.84  1.0
  Pb  Pb2  1  0.61  0.61  0.61  1.0

data_TaCoOsPb
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.56
_cell_length_b   4.56
_cell_length_c   11.17
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   TaCoOsPb
_chemical_formula_sum   'Ta3 Co3 Os3 Pb3'
_cell_volume   200.98
_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
  Ta  Ta0  3  0.0  0.0  0.78  1.0
  Co  Co1  3  0.0  0.0  0.0  1.0
  Os  Os2  3  0.0  0.0  0.16  1.0
  Pb  Pb3  3  0.0  0.0  0.39  1.0

Ta Co Os Pb
TaOsCoPb crystallizes in the trigonal R3m space group. Ta(1) is bonded in a 10-coordinate geometry to three equivalent Os(1), four equivalent Co(1), and three equivalent Pb(1) atoms. All Ta(1)-Os(1) bond lengths are 2.70 Å. There is one shorter (2.50 Å) and three longer (2.90 Å) Ta(1)-Co(1) bond lengths. All Ta(1)-Pb(1) bond lengths are 2.70 Å. Os(1) is bonded in a distorted single-bond geometry to three equivalent Ta(1), one Co(1), and one Pb(1) atom. The Os(1)-Co(1) bond length is 1.84 Å. The Os(1)-Pb(1) bond length is 2.50 Å. Co(1) is bonded in a 1-coordinate geometry to four equivalent Ta(1), one Os(1), and three equivalent Pb(1) atoms. All Co(1)-Pb(1) bond lengths are 2.70 Å. Pb(1) is bonded in a 7-coordinate geometry to three equivalent Ta(1), one Os(1), and three equivalent Co(1) atoms.