The material structure described by Pm3Ce is Magnesium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Pm(1) is bonded to eight equivalent Pm(1) and four equivalent Ce(1) atoms to form PmCe4Pm8 cuboctahedra that share corners with four equivalent Ce(1)Pm12 cuboctahedra, corners with fourteen equivalent Pm(1)Ce4Pm8 cuboctahedra, edges with six equivalent Ce(1)Pm12 cuboctahedra, edges with twelve equivalent Pm(1)Ce4Pm8 cuboctahedra, faces with four equivalent Ce(1)Pm12 cuboctahedra, and faces with sixteen equivalent Pm(1)Ce4Pm8 cuboctahedra. Ce(1) is bonded to twelve equivalent Pm(1) atoms to form CePm12 cuboctahedra that share corners with six equivalent Ce(1)Pm12 cuboctahedra, corners with twelve equivalent Pm(1)Ce4Pm8 cuboctahedra, edges with eighteen equivalent Pm(1)Ce4Pm8 cuboctahedra, faces with eight equivalent Ce(1)Pm12 cuboctahedra, and faces with twelve equivalent Pm(1)Ce4Pm8 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_CePm3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.339
_cell_length_b   7.339
_cell_length_c   5.983
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   279.061
_cell_formula_units_Z   2
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
  Ce  Ce0  1  0.333  0.667  0.750  1.0
  Ce  Ce1  1  0.667  0.333  0.250  1.0
  Pm  Pm2  1  0.167  0.334  0.250  1.0
  Pm  Pm3  1  0.666  0.833  0.250  1.0
  Pm  Pm4  1  0.167  0.833  0.250  1.0
  Pm  Pm5  1  0.833  0.666  0.750  1.0
  Pm  Pm6  1  0.334  0.167  0.750  1.0
  Pm  Pm7  1  0.833  0.167  0.750  1.0
[/CIF]
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The material structure described by Pm3Ce is Magnesium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Pm(1) is bonded to eight equivalent Pm(1) and four equivalent Ce(1) atoms to form PmCe4Pm8 cuboctahedra that share corners with four equivalent Ce(1)Pm12 cuboctahedra, corners with fourteen equivalent Pm(1)Ce4Pm8 cuboctahedra, edges with six equivalent Ce(1)Pm12 cuboctahedra, edges with twelve equivalent Pm(1)Ce4Pm8 cuboctahedra, faces with four equivalent Ce(1)Pm12 cuboctahedra, and faces with sixteen equivalent Pm(1)Ce4Pm8 cuboctahedra. Ce(1) is bonded to twelve equivalent Pm(1) atoms to form CePm12 cuboctahedra that share corners with six equivalent Ce(1)Pm12 cuboctahedra, corners with twelve equivalent Pm(1)Ce4Pm8 cuboctahedra, edges with eighteen equivalent Pm(1)Ce4Pm8 cuboctahedra, faces with eight equivalent Ce(1)Pm12 cuboctahedra, and faces with twelve equivalent Pm(1)Ce4Pm8 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_CePm3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.339
_cell_length_b   7.339
_cell_length_c   5.983
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   279.061
_cell_formula_units_Z   2
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
  Ce  Ce0  1  0.333  0.667  0.750  1.0
  Ce  Ce1  1  0.667  0.333  0.250  1.0
  Pm  Pm2  1  0.167  0.334  0.250  1.0
  Pm  Pm3  1  0.666  0.833  0.250  1.0
  Pm  Pm4  1  0.167  0.833  0.250  1.0
  Pm  Pm5  1  0.833  0.666  0.750  1.0
  Pm  Pm6  1  0.334  0.167  0.750  1.0
  Pm  Pm7  1  0.833  0.167  0.750  1.0
[/CIF]
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