data_CrTcMoPb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.52
_cell_length_b   4.52
_cell_length_c   4.52
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CrTcMoPb
_chemical_formula_sum   'Cr1 Tc1 Mo1 Pb1'
_cell_volume   65.4
_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
  Cr  Cr0  1  0.0  0.0  0.0  1.0
  Tc  Tc3  1  0.2  0.2  0.2  1.0
  Mo  Mo1  1  0.8  0.8  0.8  1.0
  Pb  Pb2  1  0.6  0.6  0.6  1.0

data_CrTcMoPb
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.52
_cell_length_b   4.52
_cell_length_c   11.08
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   CrTcMoPb
_chemical_formula_sum   'Cr3 Tc3 Mo3 Pb3'
_cell_volume   196.21
_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
  Cr  Cr0  3  0.0  0.0  0.0  1.0
  Tc  Tc1  3  0.0  0.0  0.8  1.0
  Mo  Mo2  3  0.0  0.0  0.2  1.0
  Pb  Pb3  3  0.0  0.0  0.4  1.0

Cr Tc Mo Pb
Cr Tc Mo Pb 0 2 - - - 0 3 - - o 0 3 - o - 0 3 o - - 0 1 o o o 0 1 o o - 0 1 - o o 0 1 o - o 1 2 - - o 1 2 - o - 1 2 o - - 1 3 - o o 1 3 o - o 1 3 o o - 2 3 o o o 2 3 o + o 2 3 + o o 2 3 o o + 
MoCrTcPb crystallizes in the trigonal R3m space group. Mo(1) is bonded in a 2-coordinate geometry to one Cr(1), three equivalent Tc(1), and one Pb(1) atom. The Mo(1)-Cr(1) bond length is 2.25 Å. All Mo(1)-Tc(1) bond lengths are 2.72 Å. The Mo(1)-Pb(1) bond length is 2.19 Å. Cr(1) is bonded in a 5-coordinate geometry to one Mo(1), four equivalent Tc(1), and three equivalent Pb(1) atoms. There is one shorter (2.19 Å) and three longer (3.01 Å) Cr(1)-Tc(1) bond lengths. All Cr(1)-Pb(1) bond lengths are 2.72 Å. Tc(1) is bonded in a 10-coordinate geometry to three equivalent Mo(1), four equivalent Cr(1), and three equivalent Pb(1) atoms. All Tc(1)-Pb(1) bond lengths are 2.72 Å. Pb(1) is bonded in a 7-coordinate geometry to one Mo(1), three equivalent Cr(1), and three equivalent Tc(1) atoms.