The crystal structure described by Sm3Ce is Magnesium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Sm(1) is bonded to eight equivalent Sm(1) and four equivalent Ce(1) atoms to form SmCe4Sm8 cuboctahedra that share corners with four equivalent Ce(1)Sm12 cuboctahedra, corners with fourteen equivalent Sm(1)Ce4Sm8 cuboctahedra, edges with six equivalent Ce(1)Sm12 cuboctahedra, edges with twelve equivalent Sm(1)Ce4Sm8 cuboctahedra, faces with four equivalent Ce(1)Sm12 cuboctahedra, and faces with sixteen equivalent Sm(1)Ce4Sm8 cuboctahedra. Ce(1) is bonded to twelve equivalent Sm(1) atoms to form CeSm12 cuboctahedra that share corners with six equivalent Ce(1)Sm12 cuboctahedra, corners with twelve equivalent Sm(1)Ce4Sm8 cuboctahedra, edges with eighteen equivalent Sm(1)Ce4Sm8 cuboctahedra, faces with eight equivalent Ce(1)Sm12 cuboctahedra, and faces with twelve equivalent Sm(1)Ce4Sm8 cuboctahedra. is represented by the CIF card [CIF]
data_CeSm3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.202
_cell_length_b   7.202
_cell_length_c   5.859
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   263.220
_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
  Sm  Sm2  1  0.166  0.333  0.250  1.0
  Sm  Sm3  1  0.667  0.834  0.250  1.0
  Sm  Sm4  1  0.166  0.834  0.250  1.0
  Sm  Sm5  1  0.834  0.667  0.750  1.0
  Sm  Sm6  1  0.333  0.166  0.750  1.0
  Sm  Sm7  1  0.834  0.166  0.750  1.0
[/CIF]
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The crystal structure described by Sm3Ce is Magnesium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Sm(1) is bonded to eight equivalent Sm(1) and four equivalent Ce(1) atoms to form SmCe4Sm8 cuboctahedra that share corners with four equivalent Ce(1)Sm12 cuboctahedra, corners with fourteen equivalent Sm(1)Ce4Sm8 cuboctahedra, edges with six equivalent Ce(1)Sm12 cuboctahedra, edges with twelve equivalent Sm(1)Ce4Sm8 cuboctahedra, faces with four equivalent Ce(1)Sm12 cuboctahedra, and faces with sixteen equivalent Sm(1)Ce4Sm8 cuboctahedra. Ce(1) is bonded to twelve equivalent Sm(1) atoms to form CeSm12 cuboctahedra that share corners with six equivalent Ce(1)Sm12 cuboctahedra, corners with twelve equivalent Sm(1)Ce4Sm8 cuboctahedra, edges with eighteen equivalent Sm(1)Ce4Sm8 cuboctahedra, faces with eight equivalent Ce(1)Sm12 cuboctahedra, and faces with twelve equivalent Sm(1)Ce4Sm8 cuboctahedra. is represented by the CIF card [CIF]
data_CeSm3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.202
_cell_length_b   7.202
_cell_length_c   5.859
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   263.220
_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
  Sm  Sm2  1  0.166  0.333  0.250  1.0
  Sm  Sm3  1  0.667  0.834  0.250  1.0
  Sm  Sm4  1  0.166  0.834  0.250  1.0
  Sm  Sm5  1  0.834  0.667  0.750  1.0
  Sm  Sm6  1  0.333  0.166  0.750  1.0
  Sm  Sm7  1  0.834  0.166  0.750  1.0
[/CIF]
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