The material structure described by EuSmSe2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. Eu(1) is bonded to six equivalent Se(1) atoms to form EuSe6 octahedra that share corners with six equivalent Sm(1)Se6 octahedra, edges with six equivalent Eu(1)Se6 octahedra, and edges with six equivalent Sm(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 2°. Sm(1) is bonded to six equivalent Se(1) atoms to form SmSe6 octahedra that share corners with six equivalent Eu(1)Se6 octahedra, edges with six equivalent Eu(1)Se6 octahedra, and edges with six equivalent Sm(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 2°. Se(1) is bonded to three equivalent Eu(1) and three equivalent Sm(1) atoms to form a mixture of edge and corner-sharing SeSm3Eu3 octahedra. The corner-sharing octahedra are not tilted. is represented by the Crystallographic Information File (CIF) [CIF]
data_SmEuSe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.381
_cell_length_b   7.381
_cell_length_c   7.381
_cell_angle_alpha   33.168
_cell_angle_beta   33.168
_cell_angle_gamma   33.168
_symmetry_Int_Tables_number   1
_cell_volume   107.159
_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
  Eu  Eu1  1  0.000  0.000  0.000  1.0
  Se  Se2  1  0.248  0.248  0.248  1.0
  Se  Se3  1  0.752  0.752  0.752  1.0
[/CIF]
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The material structure described by EuSmSe2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. Eu(1) is bonded to six equivalent Se(1) atoms to form EuSe6 octahedra that share corners with six equivalent Sm(1)Se6 octahedra, edges with six equivalent Eu(1)Se6 octahedra, and edges with six equivalent Sm(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 2°. Sm(1) is bonded to six equivalent Se(1) atoms to form SmSe6 octahedra that share corners with six equivalent Eu(1)Se6 octahedra, edges with six equivalent Eu(1)Se6 octahedra, and edges with six equivalent Sm(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 2°. Se(1) is bonded to three equivalent Eu(1) and three equivalent Sm(1) atoms to form a mixture of edge and corner-sharing SeSm3Eu3 octahedra. The corner-sharing octahedra are not tilted. is represented by the Crystallographic Information File (CIF) [CIF]
data_SmEuSe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.381
_cell_length_b   7.381
_cell_length_c   7.381
_cell_angle_alpha   33.168
_cell_angle_beta   33.168
_cell_angle_gamma   33.168
_symmetry_Int_Tables_number   1
_cell_volume   107.159
_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
  Eu  Eu1  1  0.000  0.000  0.000  1.0
  Se  Se2  1  0.248  0.248  0.248  1.0
  Se  Se3  1  0.752  0.752  0.752  1.0
[/CIF]
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