data_Mn2CrPb
_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   Mn2CrPb
_chemical_formula_sum   'Mn2 Cr1 Pb1'
_cell_volume   65.41
_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
  Mn  Mn1  1  0.2  0.2  0.2  1.0
  Mn  Mn2  1  0.8  0.8  0.8  1.0
  Cr  Cr0  1  0.0  0.0  0.0  1.0
  Pb  Pb3  1  0.6  0.6  0.6  1.0

data_Mn2CrPb
_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   Mn2CrPb
_chemical_formula_sum   'Mn6 Cr3 Pb3'
_cell_volume   196.23
_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
  Mn  Mn0  3  0.0  0.0  0.2  1.0
  Mn  Mn1  3  0.0  0.0  0.8  1.0
  Cr  Cr2  3  0.0  0.0  0.0  1.0
  Pb  Pb3  3  0.0  0.0  0.4  1.0

Mn Mn Cr Pb
CrMn2Pb crystallizes in the trigonal R3m space group. Cr(1) is bonded in a 5-coordinate geometry to one Mn(1), one Mn(2), and three equivalent Pb(1) atoms. The Cr(1)-Mn(1) bond length is 2.19 Å. The Cr(1)-Mn(2) bond length is 2.25 Å. All Cr(1)-Pb(1) bond lengths are 2.72 Å. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one Cr(1) and three equivalent Pb(1) atoms to form distorted corner-sharing MnCrPb3 tetrahedra. All Mn(1)-Pb(1) bond lengths are 2.72 Å. In the second Mn site, Mn(2) is bonded in a 2-coordinate geometry to one Cr(1) and one Pb(1) atom. The Mn(2)-Pb(1) bond length is 2.19 Å. Pb(1) is bonded in a 1-coordinate geometry to three equivalent Cr(1), one Mn(2), and three equivalent Mn(1) atoms.