The material described by PmLa3 is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. Pm(1) is bonded to four equivalent La(1) and eight equivalent La(2) atoms to form PmLa12 cuboctahedra that share corners with four equivalent Pm(1)La12 cuboctahedra, corners with eight equivalent La(1)La8Pm4 cuboctahedra, edges with eight equivalent Pm(1)La12 cuboctahedra, edges with sixteen equivalent La(2)La8Pm4 cuboctahedra, faces with four equivalent Pm(1)La12 cuboctahedra, faces with six equivalent La(1)La8Pm4 cuboctahedra, and faces with eight equivalent La(2)La8Pm4 cuboctahedra. There are two inequivalent La sites. In the first La site, La(1) is bonded to four equivalent Pm(1) and eight equivalent La(2) atoms to form LaLa8Pm4 cuboctahedra that share corners with four equivalent La(1)La8Pm4 cuboctahedra, corners with eight equivalent Pm(1)La12 cuboctahedra, edges with eight equivalent La(1)La8Pm4 cuboctahedra, edges with sixteen equivalent La(2)La8Pm4 cuboctahedra, faces with four equivalent La(1)La8Pm4 cuboctahedra, faces with six equivalent Pm(1)La12 cuboctahedra, and faces with eight equivalent La(2)La8Pm4 cuboctahedra. In the second La site, La(2) is bonded to four equivalent Pm(1), four equivalent La(1), and four equivalent La(2) atoms to form LaLa8Pm4 cuboctahedra that share corners with twelve equivalent La(2)La8Pm4 cuboctahedra, edges with eight equivalent Pm(1)La12 cuboctahedra, edges with eight equivalent La(1)La8Pm4 cuboctahedra, edges with eight equivalent La(2)La8Pm4 cuboctahedra, faces with four equivalent Pm(1)La12 cuboctahedra, faces with four equivalent La(1)La8Pm4 cuboctahedra, and faces with ten equivalent La(2)La8Pm4 cuboctahedra. is represented by the CIF file [CIF]
data_La3Pm
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.447
_cell_length_b   6.447
_cell_length_c   6.447
_cell_angle_alpha   131.643
_cell_angle_beta   131.643
_cell_angle_gamma   70.794
_symmetry_Int_Tables_number   1
_cell_volume   146.557
_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  0.500  0.500  0.000  1.0
  La  La1  1  0.750  0.250  0.500  1.0
  La  La2  1  0.250  0.750  0.500  1.0
  Pm  Pm3  1  0.000  0.000  0.000  1.0
[/CIF]
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The material described by PmLa3 is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. Pm(1) is bonded to four equivalent La(1) and eight equivalent La(2) atoms to form PmLa12 cuboctahedra that share corners with four equivalent Pm(1)La12 cuboctahedra, corners with eight equivalent La(1)La8Pm4 cuboctahedra, edges with eight equivalent Pm(1)La12 cuboctahedra, edges with sixteen equivalent La(2)La8Pm4 cuboctahedra, faces with four equivalent Pm(1)La12 cuboctahedra, faces with six equivalent La(1)La8Pm4 cuboctahedra, and faces with eight equivalent La(2)La8Pm4 cuboctahedra. There are two inequivalent La sites. In the first La site, La(1) is bonded to four equivalent Pm(1) and eight equivalent La(2) atoms to form LaLa8Pm4 cuboctahedra that share corners with four equivalent La(1)La8Pm4 cuboctahedra, corners with eight equivalent Pm(1)La12 cuboctahedra, edges with eight equivalent La(1)La8Pm4 cuboctahedra, edges with sixteen equivalent La(2)La8Pm4 cuboctahedra, faces with four equivalent La(1)La8Pm4 cuboctahedra, faces with six equivalent Pm(1)La12 cuboctahedra, and faces with eight equivalent La(2)La8Pm4 cuboctahedra. In the second La site, La(2) is bonded to four equivalent Pm(1), four equivalent La(1), and four equivalent La(2) atoms to form LaLa8Pm4 cuboctahedra that share corners with twelve equivalent La(2)La8Pm4 cuboctahedra, edges with eight equivalent Pm(1)La12 cuboctahedra, edges with eight equivalent La(1)La8Pm4 cuboctahedra, edges with eight equivalent La(2)La8Pm4 cuboctahedra, faces with four equivalent Pm(1)La12 cuboctahedra, faces with four equivalent La(1)La8Pm4 cuboctahedra, and faces with ten equivalent La(2)La8Pm4 cuboctahedra. is represented by the CIF file [CIF]
data_La3Pm
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.447
_cell_length_b   6.447
_cell_length_c   6.447
_cell_angle_alpha   131.643
_cell_angle_beta   131.643
_cell_angle_gamma   70.794
_symmetry_Int_Tables_number   1
_cell_volume   146.557
_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  0.500  0.500  0.000  1.0
  La  La1  1  0.750  0.250  0.500  1.0
  La  La2  1  0.250  0.750  0.500  1.0
  Pm  Pm3  1  0.000  0.000  0.000  1.0
[/CIF]
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