data_La2PmNd
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.89
_cell_length_b   5.89
_cell_length_c   5.89
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   La2PmNd
_chemical_formula_sum   'La2 Pm1 Nd1'
_cell_volume   144.35
_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
  La  La0  1  0.25  0.25  0.25  1.0
  La  La1  1  0.08  0.08  0.08  1.0
  Pm  Pm3  1  0.16  0.16  0.16  1.0
  Nd  Nd2  1  0.0  0.0  0.0  1.0

data_La2PmNd
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.89
_cell_length_b   5.89
_cell_length_c   14.42
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   La2PmNd
_chemical_formula_sum   'La6 Pm3 Nd3'
_cell_volume   433.06
_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
  La  La0  3  0.0  0.0  0.75  1.0
  La  La1  3  0.0  0.0  0.92  1.0
  Pm  Pm2  3  0.0  0.0  0.84  1.0
  Nd  Nd3  3  0.0  0.0  0.0  1.0

La La Pm Nd
PmNdLa2 is Copper structured and crystallizes in the trigonal R3m space group. The structure is zero-dimensional and consists of three PmNdLa2 clusters. Pm(1) is bonded in a linear geometry to one La(1) and one La(2) atom. The Pm(1)-La(1) bond length is 1.18 Å. The Pm(1)-La(2) bond length is 1.18 Å. Nd(1) is bonded in a single-bond geometry to one La(2) atom. The Nd(1)-La(2) bond length is 1.18 Å. There are two inequivalent La sites. In the first La site, La(1) is bonded in a single-bond geometry to one Pm(1) atom. In the second La site, La(2) is bonded in a linear geometry to one Pm(1) and one Nd(1) atom.