The material structure described by Y4CuTe8 crystallizes in the monoclinic Pc space group. There are four inequivalent Y sites. In the first Y site, Y(1) is bonded in a 9-coordinate geometry to one Cu(1), one Te(1), one Te(2), one Te(3), one Te(4), one Te(5), one Te(6), and two equivalent Te(8) atoms. In the second Y site, Y(2) is bonded in a 8-coordinate geometry to one Te(1), one Te(2), one Te(3), one Te(4), one Te(5), one Te(6), and two equivalent Te(7) atoms. In the third Y site, Y(3) is bonded in a 9-coordinate geometry to one Cu(1), one Te(1), one Te(2), one Te(5), one Te(6), one Te(7), one Te(8), and two equivalent Te(4) atoms. In the fourth Y site, Y(4) is bonded in a 9-coordinate geometry to one Cu(1), one Te(1), one Te(2), one Te(5), one Te(6), one Te(7), one Te(8), and two equivalent Te(3) atoms. Cu(1) is bonded in a 7-coordinate geometry to one Y(1), one Y(3), one Y(4), one Te(2), one Te(4), one Te(7), and one Te(8) atom. There are eight inequivalent Te sites. In the first Te site, Te(1) is bonded in a 6-coordinate geometry to one Y(1), one Y(2), one Y(3), one Y(4), and two equivalent Te(2) atoms. In the second Te site, Te(2) is bonded in a 7-coordinate geometry to one Y(1), one Y(2), one Y(3), one Y(4), one Cu(1), and two equivalent Te(1) atoms. In the third Te site, Te(3) is bonded to one Y(1), one Y(2), and two equivalent Y(4) atoms to form distorted TeY4 trigonal pyramids that share corners with two equivalent Te(4)Y4Cu trigonal bipyramids and corners with two equivalent Te(3)Y4 trigonal pyramids. In the fourth Te site, Te(4) is bonded to one Y(1), one Y(2), two equivalent Y(3), and one Cu(1) atom to form distorted TeY4Cu trigonal bipyramids that share corners with two equivalent Te(4)Y4Cu trigonal bipyramids and corners with two equivalent Te(3)Y4 trigonal pyramids. In the fifth Te site, Te(5) is bonded in a 6-coordinate geometry to one Y(1), one Y(2), one Y(3), one Y(4), and two equivalent Te(6) atoms. In the sixth Te site, Te(6) is bonded in a 6-coordinate geometry to one Y(1), one Y(2), one Y(3), one Y(4), and two equivalent Te(5) atoms. In the seventh Te site, Te(7) is bonded in a distorted pentagonal planar geometry to one Y(3), one Y(4), two equivalent Y(2), and one Cu(1) atom. In the eighth Te site, Te(8) is bonded in a distorted pentagonal planar geometry to one Y(3), one Y(4), two equivalent Y(1), and one Cu(1) atom. is represented by the CIF file [CIF]
data_Y4CuTe8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.102
_cell_length_b   11.223
_cell_length_c   15.400
_cell_angle_alpha   46.975
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   771.075
_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  0.001  0.932  0.658  1.0
  Y  Y1  1  0.999  0.932  0.158  1.0
  Y  Y2  1  0.002  0.440  0.153  1.0
  Y  Y3  1  0.998  0.440  0.653  1.0
  Y  Y4  1  0.502  0.061  0.848  1.0
  Y  Y5  1  0.494  0.564  0.338  1.0
  Y  Y6  1  0.498  0.061  0.348  1.0
  Y  Y7  1  0.506  0.564  0.838  1.0
  Cu  Cu8  1  0.697  0.213  0.598  1.0
  Cu  Cu9  1  0.303  0.213  0.098  1.0
  Te  Te10  1  0.245  0.249  0.409  1.0
  Te  Te11  1  0.250  0.252  0.910  1.0
  Te  Te12  1  0.996  0.588  0.397  1.0
  Te  Te13  1  0.004  0.588  0.897  1.0
  Te  Te14  1  0.999  0.086  0.767  1.0
  Te  Te15  1  0.001  0.086  0.267  1.0
  Te  Te16  1  0.750  0.252  0.410  1.0
  Te  Te17  1  0.745  0.747  0.088  1.0
  Te  Te18  1  0.755  0.249  0.909  1.0
  Te  Te19  1  0.751  0.754  0.585  1.0
  Te  Te20  1  0.498  0.419  0.097  1.0
  Te  Te21  1  0.495  0.913  0.739  1.0
  Te  Te22  1  0.502  0.419  0.597  1.0
  Te  Te23  1  0.505  0.913  0.239  1.0
  Te  Te24  1  0.249  0.754  0.085  1.0
  Te  Te25  1  0.255  0.747  0.588  1.0
[/CIF]
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The material structure described by Y4CuTe8 crystallizes in the monoclinic Pc space group. There are four inequivalent Y sites. In the first Y site, Y(1) is bonded in a 9-coordinate geometry to one Cu(1), one Te(1), one Te(2), one Te(3), one Te(4), one Te(5), one Te(6), and two equivalent Te(8) atoms. In the second Y site, Y(2) is bonded in a 8-coordinate geometry to one Te(1), one Te(2), one Te(3), one Te(4), one Te(5), one Te(6), and two equivalent Te(7) atoms. In the third Y site, Y(3) is bonded in a 9-coordinate geometry to one Cu(1), one Te(1), one Te(2), one Te(5), one Te(6), one Te(7), one Te(8), and two equivalent Te(4) atoms. In the fourth Y site, Y(4) is bonded in a 9-coordinate geometry to one Cu(1), one Te(1), one Te(2), one Te(5), one Te(6), one Te(7), one Te(8), and two equivalent Te(3) atoms. Cu(1) is bonded in a 7-coordinate geometry to one Y(1), one Y(3), one Y(4), one Te(2), one Te(4), one Te(7), and one Te(8) atom. There are eight inequivalent Te sites. In the first Te site, Te(1) is bonded in a 6-coordinate geometry to one Y(1), one Y(2), one Y(3), one Y(4), and two equivalent Te(2) atoms. In the second Te site, Te(2) is bonded in a 7-coordinate geometry to one Y(1), one Y(2), one Y(3), one Y(4), one Cu(1), and two equivalent Te(1) atoms. In the third Te site, Te(3) is bonded to one Y(1), one Y(2), and two equivalent Y(4) atoms to form distorted TeY4 trigonal pyramids that share corners with two equivalent Te(4)Y4Cu trigonal bipyramids and corners with two equivalent Te(3)Y4 trigonal pyramids. In the fourth Te site, Te(4) is bonded to one Y(1), one Y(2), two equivalent Y(3), and one Cu(1) atom to form distorted TeY4Cu trigonal bipyramids that share corners with two equivalent Te(4)Y4Cu trigonal bipyramids and corners with two equivalent Te(3)Y4 trigonal pyramids. In the fifth Te site, Te(5) is bonded in a 6-coordinate geometry to one Y(1), one Y(2), one Y(3), one Y(4), and two equivalent Te(6) atoms. In the sixth Te site, Te(6) is bonded in a 6-coordinate geometry to one Y(1), one Y(2), one Y(3), one Y(4), and two equivalent Te(5) atoms. In the seventh Te site, Te(7) is bonded in a distorted pentagonal planar geometry to one Y(3), one Y(4), two equivalent Y(2), and one Cu(1) atom. In the eighth Te site, Te(8) is bonded in a distorted pentagonal planar geometry to one Y(3), one Y(4), two equivalent Y(1), and one Cu(1) atom. is represented by the CIF file [CIF]
data_Y4CuTe8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.102
_cell_length_b   11.223
_cell_length_c   15.400
_cell_angle_alpha   46.975
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   771.075
_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  0.001  0.932  0.658  1.0
  Y  Y1  1  0.999  0.932  0.158  1.0
  Y  Y2  1  0.002  0.440  0.153  1.0
  Y  Y3  1  0.998  0.440  0.653  1.0
  Y  Y4  1  0.502  0.061  0.848  1.0
  Y  Y5  1  0.494  0.564  0.338  1.0
  Y  Y6  1  0.498  0.061  0.348  1.0
  Y  Y7  1  0.506  0.564  0.838  1.0
  Cu  Cu8  1  0.697  0.213  0.598  1.0
  Cu  Cu9  1  0.303  0.213  0.098  1.0
  Te  Te10  1  0.245  0.249  0.409  1.0
  Te  Te11  1  0.250  0.252  0.910  1.0
  Te  Te12  1  0.996  0.588  0.397  1.0
  Te  Te13  1  0.004  0.588  0.897  1.0
  Te  Te14  1  0.999  0.086  0.767  1.0
  Te  Te15  1  0.001  0.086  0.267  1.0
  Te  Te16  1  0.750  0.252  0.410  1.0
  Te  Te17  1  0.745  0.747  0.088  1.0
  Te  Te18  1  0.755  0.249  0.909  1.0
  Te  Te19  1  0.751  0.754  0.585  1.0
  Te  Te20  1  0.498  0.419  0.097  1.0
  Te  Te21  1  0.495  0.913  0.739  1.0
  Te  Te22  1  0.502  0.419  0.597  1.0
  Te  Te23  1  0.505  0.913  0.239  1.0
  Te  Te24  1  0.249  0.754  0.085  1.0
  Te  Te25  1  0.255  0.747  0.588  1.0
[/CIF]
.