The crystal structure described by Sm3Ce is Uranium Silicide structured and crystallizes in the cubic Pm-3m 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 twelve equivalent Sm(1)Ce4Sm8 cuboctahedra, edges with eight equivalent Ce(1)Sm12 cuboctahedra, edges with sixteen equivalent Sm(1)Ce4Sm8 cuboctahedra, faces with four equivalent Ce(1)Sm12 cuboctahedra, and faces with fourteen equivalent Sm(1)Ce4Sm8 cuboctahedra. Ce(1) is bonded to twelve equivalent Sm(1) atoms to form CeSm12 cuboctahedra that share corners with twelve equivalent Ce(1)Sm12 cuboctahedra, edges with twenty-four equivalent Sm(1)Ce4Sm8 cuboctahedra, faces with six 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   5.075
_cell_length_b   5.075
_cell_length_c   5.075
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   130.739
_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
  Ce  Ce0  1  0.000  0.000  0.000  1.0
  Sm  Sm1  1  0.000  0.500  0.500  1.0
  Sm  Sm2  1  0.500  0.000  0.500  1.0
  Sm  Sm3  1  0.500  0.500  0.000  1.0
[/CIF]
.
The crystal structure described by Sm3Ce is Uranium Silicide structured and crystallizes in the cubic Pm-3m 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 twelve equivalent Sm(1)Ce4Sm8 cuboctahedra, edges with eight equivalent Ce(1)Sm12 cuboctahedra, edges with sixteen equivalent Sm(1)Ce4Sm8 cuboctahedra, faces with four equivalent Ce(1)Sm12 cuboctahedra, and faces with fourteen equivalent Sm(1)Ce4Sm8 cuboctahedra. Ce(1) is bonded to twelve equivalent Sm(1) atoms to form CeSm12 cuboctahedra that share corners with twelve equivalent Ce(1)Sm12 cuboctahedra, edges with twenty-four equivalent Sm(1)Ce4Sm8 cuboctahedra, faces with six 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   5.075
_cell_length_b   5.075
_cell_length_c   5.075
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   130.739
_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
  Ce  Ce0  1  0.000  0.000  0.000  1.0
  Sm  Sm1  1  0.000  0.500  0.500  1.0
  Sm  Sm2  1  0.500  0.000  0.500  1.0
  Sm  Sm3  1  0.500  0.500  0.000  1.0
[/CIF]
.