The compound described by YCuTe2 crystallizes in the monoclinic P2/m space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form distorted YTe6 octahedra that share corners with four equivalent Cu(1)Te4 tetrahedra, edges with two equivalent Y(1)Te6 octahedra, edges with four equivalent Y(2)Te6 octahedra, and edges with four equivalent Cu(1)Te4 tetrahedra. In the second Y site, Y(2) is bonded to two equivalent Te(2) and four equivalent Te(1) atoms to form distorted YTe6 octahedra that share corners with eight equivalent Cu(1)Te4 tetrahedra, edges with two equivalent Y(2)Te6 octahedra, edges with four equivalent Y(1)Te6 octahedra, and edges with two equivalent Cu(1)Te4 tetrahedra. Cu(1) is bonded to two equivalent Te(1) and two equivalent Te(2) atoms to form distorted CuTe4 tetrahedra that share corners with two equivalent Y(1)Te6 octahedra, corners with four equivalent Y(2)Te6 octahedra, corners with two equivalent Cu(1)Te4 tetrahedra,  an edgeedge with one Y(2)Te6 octahedra, edges with two equivalent Y(1)Te6 octahedra, and  an edgeedge with one Cu(1)Te4 tetrahedra. The corner-sharing octahedral tilt angles range from 22-56°. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to one Y(1), two equivalent Y(2), and two equivalent Cu(1) atoms to form a mixture of corner and edge-sharing TeY3Cu2 square pyramids. In the second Te site, Te(2) is bonded to one Y(2), two equivalent Y(1), and two equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing TeY3Cu2 square pyramids. is represented by the CIF file [CIF]
data_YCuTe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.339
_cell_length_b   6.907
_cell_length_c   7.494
_cell_angle_alpha   88.969
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   224.573
_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
  Y  Y0  1  0.000  0.000  0.000  1.0
  Y  Y1  1  0.500  0.000  0.500  1.0
  Cu  Cu2  1  0.500  0.646  0.840  1.0
  Cu  Cu3  1  0.500  0.354  0.160  1.0
  Te  Te4  1  0.000  0.263  0.333  1.0
  Te  Te5  1  0.500  0.261  0.825  1.0
  Te  Te6  1  0.500  0.739  0.175  1.0
  Te  Te7  1  0.000  0.737  0.667  1.0
[/CIF]
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The compound described by YCuTe2 crystallizes in the monoclinic P2/m space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form distorted YTe6 octahedra that share corners with four equivalent Cu(1)Te4 tetrahedra, edges with two equivalent Y(1)Te6 octahedra, edges with four equivalent Y(2)Te6 octahedra, and edges with four equivalent Cu(1)Te4 tetrahedra. In the second Y site, Y(2) is bonded to two equivalent Te(2) and four equivalent Te(1) atoms to form distorted YTe6 octahedra that share corners with eight equivalent Cu(1)Te4 tetrahedra, edges with two equivalent Y(2)Te6 octahedra, edges with four equivalent Y(1)Te6 octahedra, and edges with two equivalent Cu(1)Te4 tetrahedra. Cu(1) is bonded to two equivalent Te(1) and two equivalent Te(2) atoms to form distorted CuTe4 tetrahedra that share corners with two equivalent Y(1)Te6 octahedra, corners with four equivalent Y(2)Te6 octahedra, corners with two equivalent Cu(1)Te4 tetrahedra,  an edgeedge with one Y(2)Te6 octahedra, edges with two equivalent Y(1)Te6 octahedra, and  an edgeedge with one Cu(1)Te4 tetrahedra. The corner-sharing octahedral tilt angles range from 22-56°. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to one Y(1), two equivalent Y(2), and two equivalent Cu(1) atoms to form a mixture of corner and edge-sharing TeY3Cu2 square pyramids. In the second Te site, Te(2) is bonded to one Y(2), two equivalent Y(1), and two equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing TeY3Cu2 square pyramids. is represented by the CIF file [CIF]
data_YCuTe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.339
_cell_length_b   6.907
_cell_length_c   7.494
_cell_angle_alpha   88.969
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   224.573
_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
  Y  Y0  1  0.000  0.000  0.000  1.0
  Y  Y1  1  0.500  0.000  0.500  1.0
  Cu  Cu2  1  0.500  0.646  0.840  1.0
  Cu  Cu3  1  0.500  0.354  0.160  1.0
  Te  Te4  1  0.000  0.263  0.333  1.0
  Te  Te5  1  0.500  0.261  0.825  1.0
  Te  Te6  1  0.500  0.739  0.175  1.0
  Te  Te7  1  0.000  0.737  0.667  1.0
[/CIF]
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