The structure described by GdSmSe2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. Gd(1) is bonded to six equivalent Se(1) atoms to form GdSe6 octahedra that share corners with six equivalent Sm(1)Se6 octahedra, edges with six equivalent Gd(1)Se6 octahedra, and edges with six equivalent Sm(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 1°. Sm(1) is bonded to six equivalent Se(1) atoms to form SmSe6 octahedra that share corners with six equivalent Gd(1)Se6 octahedra, edges with six equivalent Gd(1)Se6 octahedra, and edges with six equivalent Sm(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 1°. Se(1) is bonded to three equivalent Gd(1) and three equivalent Sm(1) atoms to form a mixture of corner and edge-sharing SeSm3Gd3 octahedra. The corner-sharing octahedra are not tilted. is represented by the CIF card [CIF]
data_SmGdSe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.183
_cell_length_b   7.183
_cell_length_c   7.183
_cell_angle_alpha   33.475
_cell_angle_beta   33.475
_cell_angle_gamma   33.475
_symmetry_Int_Tables_number   1
_cell_volume   100.428
_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  0.500  0.500  0.500  1.0
  Gd  Gd1  1  0.000  0.000  0.000  1.0
  Se  Se2  1  0.252  0.252  0.252  1.0
  Se  Se3  1  0.748  0.748  0.748  1.0
[/CIF]
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The structure described by GdSmSe2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. Gd(1) is bonded to six equivalent Se(1) atoms to form GdSe6 octahedra that share corners with six equivalent Sm(1)Se6 octahedra, edges with six equivalent Gd(1)Se6 octahedra, and edges with six equivalent Sm(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 1°. Sm(1) is bonded to six equivalent Se(1) atoms to form SmSe6 octahedra that share corners with six equivalent Gd(1)Se6 octahedra, edges with six equivalent Gd(1)Se6 octahedra, and edges with six equivalent Sm(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 1°. Se(1) is bonded to three equivalent Gd(1) and three equivalent Sm(1) atoms to form a mixture of corner and edge-sharing SeSm3Gd3 octahedra. The corner-sharing octahedra are not tilted. is represented by the CIF card [CIF]
data_SmGdSe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.183
_cell_length_b   7.183
_cell_length_c   7.183
_cell_angle_alpha   33.475
_cell_angle_beta   33.475
_cell_angle_gamma   33.475
_symmetry_Int_Tables_number   1
_cell_volume   100.428
_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  0.500  0.500  0.500  1.0
  Gd  Gd1  1  0.000  0.000  0.000  1.0
  Se  Se2  1  0.252  0.252  0.252  1.0
  Se  Se3  1  0.748  0.748  0.748  1.0
[/CIF]
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