The structure described by Gd3Sm is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded to four equivalent Gd(1), four equivalent Gd(2), and four equivalent Sm(1) atoms to form GdSm4Gd8 cuboctahedra that share corners with twelve equivalent Gd(1)Sm4Gd8 cuboctahedra, edges with eight equivalent Gd(1)Sm4Gd8 cuboctahedra, edges with eight equivalent Gd(2)Sm4Gd8 cuboctahedra, edges with eight equivalent Sm(1)Gd12 cuboctahedra, faces with four equivalent Gd(2)Sm4Gd8 cuboctahedra, faces with four equivalent Sm(1)Gd12 cuboctahedra, and faces with ten equivalent Gd(1)Sm4Gd8 cuboctahedra. In the second Gd site, Gd(2) is bonded to eight equivalent Gd(1) and four equivalent Sm(1) atoms to form GdSm4Gd8 cuboctahedra that share corners with four equivalent Gd(2)Sm4Gd8 cuboctahedra, corners with eight equivalent Sm(1)Gd12 cuboctahedra, edges with eight equivalent Gd(2)Sm4Gd8 cuboctahedra, edges with sixteen equivalent Gd(1)Sm4Gd8 cuboctahedra, faces with four equivalent Gd(2)Sm4Gd8 cuboctahedra, faces with six equivalent Sm(1)Gd12 cuboctahedra, and faces with eight equivalent Gd(1)Sm4Gd8 cuboctahedra. Sm(1) is bonded to four equivalent Gd(2) and eight equivalent Gd(1) atoms to form SmGd12 cuboctahedra that share corners with four equivalent Sm(1)Gd12 cuboctahedra, corners with eight equivalent Gd(2)Sm4Gd8 cuboctahedra, edges with eight equivalent Sm(1)Gd12 cuboctahedra, edges with sixteen equivalent Gd(1)Sm4Gd8 cuboctahedra, faces with four equivalent Sm(1)Gd12 cuboctahedra, faces with six equivalent Gd(2)Sm4Gd8 cuboctahedra, and faces with eight equivalent Gd(1)Sm4Gd8 cuboctahedra. is represented by the CIF file [CIF]
data_SmGd3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.260
_cell_length_b   6.260
_cell_length_c   6.260
_cell_angle_alpha   131.947
_cell_angle_beta   131.947
_cell_angle_gamma   70.313
_symmetry_Int_Tables_number   1
_cell_volume   132.984
_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
  Sm  Sm0  1  0.000  0.000  0.000  1.0
  Gd  Gd1  1  0.750  0.250  0.500  1.0
  Gd  Gd2  1  0.250  0.750  0.500  1.0
  Gd  Gd3  1  0.500  0.500  0.000  1.0
[/CIF]
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The structure described by Gd3Sm is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded to four equivalent Gd(1), four equivalent Gd(2), and four equivalent Sm(1) atoms to form GdSm4Gd8 cuboctahedra that share corners with twelve equivalent Gd(1)Sm4Gd8 cuboctahedra, edges with eight equivalent Gd(1)Sm4Gd8 cuboctahedra, edges with eight equivalent Gd(2)Sm4Gd8 cuboctahedra, edges with eight equivalent Sm(1)Gd12 cuboctahedra, faces with four equivalent Gd(2)Sm4Gd8 cuboctahedra, faces with four equivalent Sm(1)Gd12 cuboctahedra, and faces with ten equivalent Gd(1)Sm4Gd8 cuboctahedra. In the second Gd site, Gd(2) is bonded to eight equivalent Gd(1) and four equivalent Sm(1) atoms to form GdSm4Gd8 cuboctahedra that share corners with four equivalent Gd(2)Sm4Gd8 cuboctahedra, corners with eight equivalent Sm(1)Gd12 cuboctahedra, edges with eight equivalent Gd(2)Sm4Gd8 cuboctahedra, edges with sixteen equivalent Gd(1)Sm4Gd8 cuboctahedra, faces with four equivalent Gd(2)Sm4Gd8 cuboctahedra, faces with six equivalent Sm(1)Gd12 cuboctahedra, and faces with eight equivalent Gd(1)Sm4Gd8 cuboctahedra. Sm(1) is bonded to four equivalent Gd(2) and eight equivalent Gd(1) atoms to form SmGd12 cuboctahedra that share corners with four equivalent Sm(1)Gd12 cuboctahedra, corners with eight equivalent Gd(2)Sm4Gd8 cuboctahedra, edges with eight equivalent Sm(1)Gd12 cuboctahedra, edges with sixteen equivalent Gd(1)Sm4Gd8 cuboctahedra, faces with four equivalent Sm(1)Gd12 cuboctahedra, faces with six equivalent Gd(2)Sm4Gd8 cuboctahedra, and faces with eight equivalent Gd(1)Sm4Gd8 cuboctahedra. is represented by the CIF file [CIF]
data_SmGd3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.260
_cell_length_b   6.260
_cell_length_c   6.260
_cell_angle_alpha   131.947
_cell_angle_beta   131.947
_cell_angle_gamma   70.313
_symmetry_Int_Tables_number   1
_cell_volume   132.984
_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
  Sm  Sm0  1  0.000  0.000  0.000  1.0
  Gd  Gd1  1  0.750  0.250  0.500  1.0
  Gd  Gd2  1  0.250  0.750  0.500  1.0
  Gd  Gd3  1  0.500  0.500  0.000  1.0
[/CIF]
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