data_Er2HfPb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.27
_cell_length_b   5.27
_cell_length_c   5.27
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Er2HfPb
_chemical_formula_sum   'Er2 Hf1 Pb1'
_cell_volume   103.33
_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
  Er  Er0  1  0.59  0.59  0.59  1.0
  Er  Er1  1  0.86  0.86  0.86  1.0
  Hf  Hf2  1  0.0  0.0  0.0  1.0
  Pb  Pb3  1  0.72  0.72  0.72  1.0

data_Er2HfPb
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.27
_cell_length_b   5.27
_cell_length_c   12.9
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   Er2HfPb
_chemical_formula_sum   'Er6 Hf3 Pb3'
_cell_volume   309.98
_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
  Er  Er0  3  0.0  0.0  0.14  1.0
  Er  Er1  3  0.0  0.0  0.41  1.0
  Hf  Hf2  3  0.0  0.0  0.0  1.0
  Pb  Pb3  3  0.0  0.0  0.28  1.0

Er Er Hf Pb
Er2HfPb crystallizes in the trigonal R3m space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a single-bond geometry to one Pb(1) atom. The Er(1)-Pb(1) bond length is 1.78 Å. In the second Er site, Er(2) is bonded in a distorted linear geometry to one Hf(1) and one Pb(1) atom. The Er(2)-Hf(1) bond length is 1.78 Å. The Er(2)-Pb(1) bond length is 1.78 Å. Hf(1) is bonded to one Er(2) and three equivalent Pb(1) atoms to form distorted corner-sharing HfErPb3 tetrahedra. All Hf(1)-Pb(1) bond lengths are 3.13 Å. Pb(1) is bonded in a linear geometry to one Er(1), one Er(2), and three equivalent Hf(1) atoms.