The structure described by Cs2Te5 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Cs sites. In the first Cs site, Cs(1) is bonded in a 9-coordinate geometry to one Te(2) and eight equivalent Te(1) atoms. In the second Cs site, Cs(2) is bonded in a 9-coordinate geometry to one Te(2) and eight equivalent Te(1) atoms. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to two equivalent Cs(1), two equivalent Cs(2), one Te(1), and one Te(2) atom to form distorted TeCs4Te2 octahedra that share corners with three equivalent Te(2)Cs2Te4 octahedra, corners with thirteen equivalent Te(1)Cs4Te2 octahedra,  an edgeedge with one Te(2)Cs2Te4 octahedra, edges with six equivalent Te(1)Cs4Te2 octahedra, and faces with two equivalent Te(1)Cs4Te2 octahedra. The corner-sharing octahedral tilt angles range from 2-96°. In the second Te site, Te(2) is bonded to one Cs(1), one Cs(2), and four equivalent Te(1) atoms to form a mixture of edge and corner-sharing TeCs2Te4 octahedra. The corner-sharing octahedral tilt angles range from 56-96°. is represented by the CIF file [CIF]
data_Cs2Te5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.918
_cell_length_b   7.918
_cell_length_c   10.357
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   104.317
_symmetry_Int_Tables_number   1
_cell_volume   629.182
_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
  Cs  Cs0  1  0.430  0.570  0.250  1.0
  Cs  Cs1  1  0.570  0.430  0.750  1.0
  Cs  Cs2  1  0.792  0.208  0.250  1.0
  Cs  Cs3  1  0.208  0.792  0.750  1.0
  Te  Te4  1  0.120  0.333  0.542  1.0
  Te  Te5  1  0.333  0.120  0.458  1.0
  Te  Te6  1  0.120  0.333  0.958  1.0
  Te  Te7  1  0.333  0.120  0.042  1.0
  Te  Te8  1  0.880  0.667  0.458  1.0
  Te  Te9  1  0.667  0.880  0.542  1.0
  Te  Te10  1  0.880  0.667  0.042  1.0
  Te  Te11  1  0.667  0.880  0.958  1.0
  Te  Te12  1  0.110  0.890  0.250  1.0
  Te  Te13  1  0.890  0.110  0.750  1.0
[/CIF]
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The structure described by Cs2Te5 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Cs sites. In the first Cs site, Cs(1) is bonded in a 9-coordinate geometry to one Te(2) and eight equivalent Te(1) atoms. In the second Cs site, Cs(2) is bonded in a 9-coordinate geometry to one Te(2) and eight equivalent Te(1) atoms. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to two equivalent Cs(1), two equivalent Cs(2), one Te(1), and one Te(2) atom to form distorted TeCs4Te2 octahedra that share corners with three equivalent Te(2)Cs2Te4 octahedra, corners with thirteen equivalent Te(1)Cs4Te2 octahedra,  an edgeedge with one Te(2)Cs2Te4 octahedra, edges with six equivalent Te(1)Cs4Te2 octahedra, and faces with two equivalent Te(1)Cs4Te2 octahedra. The corner-sharing octahedral tilt angles range from 2-96°. In the second Te site, Te(2) is bonded to one Cs(1), one Cs(2), and four equivalent Te(1) atoms to form a mixture of edge and corner-sharing TeCs2Te4 octahedra. The corner-sharing octahedral tilt angles range from 56-96°. is represented by the CIF file [CIF]
data_Cs2Te5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.918
_cell_length_b   7.918
_cell_length_c   10.357
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   104.317
_symmetry_Int_Tables_number   1
_cell_volume   629.182
_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
  Cs  Cs0  1  0.430  0.570  0.250  1.0
  Cs  Cs1  1  0.570  0.430  0.750  1.0
  Cs  Cs2  1  0.792  0.208  0.250  1.0
  Cs  Cs3  1  0.208  0.792  0.750  1.0
  Te  Te4  1  0.120  0.333  0.542  1.0
  Te  Te5  1  0.333  0.120  0.458  1.0
  Te  Te6  1  0.120  0.333  0.958  1.0
  Te  Te7  1  0.333  0.120  0.042  1.0
  Te  Te8  1  0.880  0.667  0.458  1.0
  Te  Te9  1  0.667  0.880  0.542  1.0
  Te  Te10  1  0.880  0.667  0.042  1.0
  Te  Te11  1  0.667  0.880  0.958  1.0
  Te  Te12  1  0.110  0.890  0.250  1.0
  Te  Te13  1  0.890  0.110  0.750  1.0
[/CIF]
.