The crystal structure described by Sr(GdSe2)2 crystallizes in the tetragonal I-42d space group. Sr(1) is bonded in a 8-coordinate geometry to eight equivalent Se(1) atoms. Gd(1) is bonded in a 8-coordinate geometry to eight equivalent Se(1) atoms. Se(1) is bonded to two equivalent Sr(1) and four equivalent Gd(1) atoms to form a mixture of distorted edge, corner, and face-sharing SeSr2Gd4 octahedra. The corner-sharing octahedral tilt angles range from 17-50°. is represented by the CIF file [CIF]
data_Sr(GdSe2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.761
_cell_length_b   7.761
_cell_length_c   7.761
_cell_angle_alpha   109.363
_cell_angle_beta   109.363
_cell_angle_gamma   109.688
_symmetry_Int_Tables_number   1
_cell_volume   359.822
_cell_formula_units_Z   2
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  0.000  1.0
  Sr  Sr1  1  0.750  0.250  0.500  1.0
  Gd  Gd2  1  0.625  0.999  0.874  1.0
  Gd  Gd3  1  0.125  0.751  0.126  1.0
  Gd  Gd4  1  0.001  0.875  0.626  1.0
  Gd  Gd5  1  0.249  0.375  0.374  1.0
  Se  Se6  1  0.361  0.113  0.099  1.0
  Se  Se7  1  0.363  0.111  0.599  1.0
  Se  Se8  1  0.889  0.488  0.253  1.0
  Se  Se9  1  0.887  0.985  0.247  1.0
  Se  Se10  1  0.512  0.765  0.401  1.0
  Se  Se11  1  0.738  0.639  0.753  1.0
  Se  Se12  1  0.015  0.262  0.901  1.0
  Se  Se13  1  0.235  0.637  0.747  1.0
[/CIF]
.
The crystal structure described by Sr(GdSe2)2 crystallizes in the tetragonal I-42d space group. Sr(1) is bonded in a 8-coordinate geometry to eight equivalent Se(1) atoms. Gd(1) is bonded in a 8-coordinate geometry to eight equivalent Se(1) atoms. Se(1) is bonded to two equivalent Sr(1) and four equivalent Gd(1) atoms to form a mixture of distorted edge, corner, and face-sharing SeSr2Gd4 octahedra. The corner-sharing octahedral tilt angles range from 17-50°. is represented by the CIF file [CIF]
data_Sr(GdSe2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.761
_cell_length_b   7.761
_cell_length_c   7.761
_cell_angle_alpha   109.363
_cell_angle_beta   109.363
_cell_angle_gamma   109.688
_symmetry_Int_Tables_number   1
_cell_volume   359.822
_cell_formula_units_Z   2
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  0.000  1.0
  Sr  Sr1  1  0.750  0.250  0.500  1.0
  Gd  Gd2  1  0.625  0.999  0.874  1.0
  Gd  Gd3  1  0.125  0.751  0.126  1.0
  Gd  Gd4  1  0.001  0.875  0.626  1.0
  Gd  Gd5  1  0.249  0.375  0.374  1.0
  Se  Se6  1  0.361  0.113  0.099  1.0
  Se  Se7  1  0.363  0.111  0.599  1.0
  Se  Se8  1  0.889  0.488  0.253  1.0
  Se  Se9  1  0.887  0.985  0.247  1.0
  Se  Se10  1  0.512  0.765  0.401  1.0
  Se  Se11  1  0.738  0.639  0.753  1.0
  Se  Se12  1  0.015  0.262  0.901  1.0
  Se  Se13  1  0.235  0.637  0.747  1.0
[/CIF]
.