The material described by SrEuSe2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. Sr(1) is bonded to six equivalent Se(1) atoms to form SrSe6 octahedra that share corners with six equivalent Eu(1)Se6 octahedra, edges with six equivalent Sr(1)Se6 octahedra, and edges with six equivalent Eu(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 1°. Eu(1) is bonded to six equivalent Se(1) atoms to form EuSe6 octahedra that share corners with six equivalent Sr(1)Se6 octahedra, edges with six equivalent Sr(1)Se6 octahedra, and edges with six equivalent Eu(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 1°. Se(1) is bonded to three equivalent Sr(1) and three equivalent Eu(1) atoms to form a mixture of corner and edge-sharing SeSr3Eu3 octahedra. The corner-sharing octahedra are not tilted. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrEuSe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.617
_cell_length_b   7.617
_cell_length_c   7.617
_cell_angle_alpha   33.546
_cell_angle_beta   33.546
_cell_angle_gamma   33.546
_symmetry_Int_Tables_number   1
_cell_volume   120.183
_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
  Sr  Sr0  1  0.500  0.500  0.500  1.0
  Eu  Eu1  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 material described by SrEuSe2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. Sr(1) is bonded to six equivalent Se(1) atoms to form SrSe6 octahedra that share corners with six equivalent Eu(1)Se6 octahedra, edges with six equivalent Sr(1)Se6 octahedra, and edges with six equivalent Eu(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 1°. Eu(1) is bonded to six equivalent Se(1) atoms to form EuSe6 octahedra that share corners with six equivalent Sr(1)Se6 octahedra, edges with six equivalent Sr(1)Se6 octahedra, and edges with six equivalent Eu(1)Se6 octahedra. The corner-sharing octahedral tilt angles are 1°. Se(1) is bonded to three equivalent Sr(1) and three equivalent Eu(1) atoms to form a mixture of corner and edge-sharing SeSr3Eu3 octahedra. The corner-sharing octahedra are not tilted. is represented by the Crystallographic Information File (CIF) [CIF]
data_SrEuSe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.617
_cell_length_b   7.617
_cell_length_c   7.617
_cell_angle_alpha   33.546
_cell_angle_beta   33.546
_cell_angle_gamma   33.546
_symmetry_Int_Tables_number   1
_cell_volume   120.183
_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
  Sr  Sr0  1  0.500  0.500  0.500  1.0
  Eu  Eu1  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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