The structure described by Y7Cu3Te12 crystallizes in the triclinic P1 space group. There are seven inequivalent Y sites. In the first Y site, Y(1) is bonded in a hexagonal planar geometry to one Y(4), one Y(6), one Te(12), one Te(2), one Te(6), and one Te(8) atom. In the second Y site, Y(2) is bonded in a distorted rectangular see-saw-like geometry to one Te(2), one Te(6), one Te(7), and one Te(9) atom. In the third Y site, Y(3) is bonded to one Y(5), one Y(7), one Cu(3), one Te(1), one Te(3), one Te(7), and one Te(9) atom to form distorted YY2CuTe4 hexagonal pyramids that share  a cornercorner with one Te(3)Y2Cu3Te2 hexagonal pyramid and  an edgeedge with one Te(3)Y2Cu3Te2 hexagonal pyramid. In the fourth Y site, Y(4) is bonded in a 7-coordinate geometry to one Y(1), one Y(6), one Cu(1), one Te(10), one Te(2), one Te(4), and one Te(8) atom. In the fifth Y site, Y(5) is bonded in a 7-coordinate geometry to one Y(3), one Y(7), one Cu(2), one Te(11), one Te(3), one Te(5), and one Te(9) atom. In the sixth Y site, Y(6) is bonded in a 7-coordinate geometry to one Y(1), one Y(4), one Cu(1), one Te(10), one Te(12), one Te(4), and one Te(6) atom. In the seventh Y site, Y(7) is bonded in a 8-coordinate geometry to one Y(3), one Y(5), one Cu(2), one Cu(3), one Te(1), one Te(11), one Te(5), and one Te(7) atom. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 5-coordinate geometry to one Y(4), one Y(6), one Te(12), one Te(3), and one Te(8) atom. In the second Cu site, Cu(2) is bonded in a 6-coordinate geometry to one Y(5), one Y(7), one Cu(3), one Te(1), one Te(12), and one Te(3) atom. In the third Cu site, Cu(3) is bonded in a 6-coordinate geometry to one Y(3), one Y(7), one Cu(2), one Te(3), one Te(5), and one Te(8) atom. There are twelve inequivalent Te sites. In the first Te site, Te(1) is bonded in a 5-coordinate geometry to one Y(3), one Y(7), one Cu(2), one Te(3), and one Te(5) atom. In the second Te site, Te(2) is bonded in a 5-coordinate geometry to one Y(1), one Y(2), one Y(4), one Te(4), and one Te(6) atom. In the third Te site, Te(3) is bonded to one Y(3), one Y(5), one Cu(1), one Cu(2), one Cu(3), one Te(1), and one Te(5) atom to form distorted TeY2Cu3Te2 hexagonal pyramids that share  a cornercorner with one Y(3)Y2CuTe4 hexagonal pyramid and  an edgeedge with one Y(3)Y2CuTe4 hexagonal pyramid. In the fourth Te site, Te(4) is bonded in a 4-coordinate geometry to one Y(4), one Y(6), one Te(2), and one Te(6) atom. In the fifth Te site, Te(5) is bonded in a 5-coordinate geometry to one Y(5), one Y(7), one Cu(3), one Te(1), and one Te(3) atom. In the sixth Te site, Te(6) is bonded in a 5-coordinate geometry to one Y(1), one Y(2), one Y(6), one Te(2), and one Te(4) atom. In the seventh Te site, Te(7) is bonded in a 5-coordinate geometry to one Y(2), one Y(3), one Y(7), one Te(11), and one Te(9) atom. In the eighth Te site, Te(8) is bonded in a distorted hexagonal planar geometry to one Y(1), one Y(4), one Cu(1), one Cu(3), one Te(10), and one Te(12) atom. In the ninth Te site, Te(9) is bonded in a 5-coordinate geometry to one Y(2), one Y(3), one Y(5), one Te(11), and one Te(7) atom. In the tenth Te site, Te(10) is bonded in a 4-coordinate geometry to one Y(4), one Y(6), one Te(12), and one Te(8) atom. In the eleventh Te site, Te(11) is bonded in a 4-coordinate geometry to one Y(5), one Y(7), one Te(7), and one Te(9) atom. In the twelfth Te site, Te(12) is bonded in a distorted hexagonal planar geometry to one Y(1), one Y(6), one Cu(1), one Cu(2), one Te(10), and one Te(8) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Y7(CuTe4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.535
_cell_length_b   7.548
_cell_length_c   14.306
_cell_angle_alpha   84.676
_cell_angle_beta   79.695
_cell_angle_gamma   60.052
_symmetry_Int_Tables_number   1
_cell_volume   693.679
_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
  Y  Y0  1  0.578  0.995  0.254  1.0
  Y  Y1  1  0.333  0.667  0.002  1.0
  Y  Y2  1  0.088  0.333  0.748  1.0
  Y  Y3  1  0.247  0.338  0.254  1.0
  Y  Y4  1  0.749  0.670  0.748  1.0
  Y  Y5  1  0.920  0.665  0.254  1.0
  Y  Y6  1  0.415  0.998  0.748  1.0
  Cu  Cu7  1  0.859  0.335  0.428  1.0
  Cu  Cu8  1  0.811  0.999  0.569  1.0
  Cu  Cu9  1  0.476  0.334  0.569  1.0
  Te  Te10  1  0.127  0.998  0.618  1.0
  Te  Te11  1  0.293  0.001  0.125  1.0
  Te  Te12  1  0.798  0.338  0.619  1.0
  Te  Te13  1  0.958  0.333  0.125  1.0
  Te  Te14  1  0.459  0.667  0.617  1.0
  Te  Te15  1  0.625  0.667  0.125  1.0
  Te  Te16  1  0.376  0.333  0.874  1.0
  Te  Te17  1  0.536  0.332  0.380  1.0
  Te  Te18  1  0.041  0.665  0.874  1.0
  Te  Te19  1  0.207  0.667  0.381  1.0
  Te  Te20  1  0.708  0.000  0.874  1.0
  Te  Te21  1  0.873  0.996  0.380  1.0
[/CIF]
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The structure described by Y7Cu3Te12 crystallizes in the triclinic P1 space group. There are seven inequivalent Y sites. In the first Y site, Y(1) is bonded in a hexagonal planar geometry to one Y(4), one Y(6), one Te(12), one Te(2), one Te(6), and one Te(8) atom. In the second Y site, Y(2) is bonded in a distorted rectangular see-saw-like geometry to one Te(2), one Te(6), one Te(7), and one Te(9) atom. In the third Y site, Y(3) is bonded to one Y(5), one Y(7), one Cu(3), one Te(1), one Te(3), one Te(7), and one Te(9) atom to form distorted YY2CuTe4 hexagonal pyramids that share  a cornercorner with one Te(3)Y2Cu3Te2 hexagonal pyramid and  an edgeedge with one Te(3)Y2Cu3Te2 hexagonal pyramid. In the fourth Y site, Y(4) is bonded in a 7-coordinate geometry to one Y(1), one Y(6), one Cu(1), one Te(10), one Te(2), one Te(4), and one Te(8) atom. In the fifth Y site, Y(5) is bonded in a 7-coordinate geometry to one Y(3), one Y(7), one Cu(2), one Te(11), one Te(3), one Te(5), and one Te(9) atom. In the sixth Y site, Y(6) is bonded in a 7-coordinate geometry to one Y(1), one Y(4), one Cu(1), one Te(10), one Te(12), one Te(4), and one Te(6) atom. In the seventh Y site, Y(7) is bonded in a 8-coordinate geometry to one Y(3), one Y(5), one Cu(2), one Cu(3), one Te(1), one Te(11), one Te(5), and one Te(7) atom. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 5-coordinate geometry to one Y(4), one Y(6), one Te(12), one Te(3), and one Te(8) atom. In the second Cu site, Cu(2) is bonded in a 6-coordinate geometry to one Y(5), one Y(7), one Cu(3), one Te(1), one Te(12), and one Te(3) atom. In the third Cu site, Cu(3) is bonded in a 6-coordinate geometry to one Y(3), one Y(7), one Cu(2), one Te(3), one Te(5), and one Te(8) atom. There are twelve inequivalent Te sites. In the first Te site, Te(1) is bonded in a 5-coordinate geometry to one Y(3), one Y(7), one Cu(2), one Te(3), and one Te(5) atom. In the second Te site, Te(2) is bonded in a 5-coordinate geometry to one Y(1), one Y(2), one Y(4), one Te(4), and one Te(6) atom. In the third Te site, Te(3) is bonded to one Y(3), one Y(5), one Cu(1), one Cu(2), one Cu(3), one Te(1), and one Te(5) atom to form distorted TeY2Cu3Te2 hexagonal pyramids that share  a cornercorner with one Y(3)Y2CuTe4 hexagonal pyramid and  an edgeedge with one Y(3)Y2CuTe4 hexagonal pyramid. In the fourth Te site, Te(4) is bonded in a 4-coordinate geometry to one Y(4), one Y(6), one Te(2), and one Te(6) atom. In the fifth Te site, Te(5) is bonded in a 5-coordinate geometry to one Y(5), one Y(7), one Cu(3), one Te(1), and one Te(3) atom. In the sixth Te site, Te(6) is bonded in a 5-coordinate geometry to one Y(1), one Y(2), one Y(6), one Te(2), and one Te(4) atom. In the seventh Te site, Te(7) is bonded in a 5-coordinate geometry to one Y(2), one Y(3), one Y(7), one Te(11), and one Te(9) atom. In the eighth Te site, Te(8) is bonded in a distorted hexagonal planar geometry to one Y(1), one Y(4), one Cu(1), one Cu(3), one Te(10), and one Te(12) atom. In the ninth Te site, Te(9) is bonded in a 5-coordinate geometry to one Y(2), one Y(3), one Y(5), one Te(11), and one Te(7) atom. In the tenth Te site, Te(10) is bonded in a 4-coordinate geometry to one Y(4), one Y(6), one Te(12), and one Te(8) atom. In the eleventh Te site, Te(11) is bonded in a 4-coordinate geometry to one Y(5), one Y(7), one Te(7), and one Te(9) atom. In the twelfth Te site, Te(12) is bonded in a distorted hexagonal planar geometry to one Y(1), one Y(6), one Cu(1), one Cu(2), one Te(10), and one Te(8) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Y7(CuTe4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.535
_cell_length_b   7.548
_cell_length_c   14.306
_cell_angle_alpha   84.676
_cell_angle_beta   79.695
_cell_angle_gamma   60.052
_symmetry_Int_Tables_number   1
_cell_volume   693.679
_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
  Y  Y0  1  0.578  0.995  0.254  1.0
  Y  Y1  1  0.333  0.667  0.002  1.0
  Y  Y2  1  0.088  0.333  0.748  1.0
  Y  Y3  1  0.247  0.338  0.254  1.0
  Y  Y4  1  0.749  0.670  0.748  1.0
  Y  Y5  1  0.920  0.665  0.254  1.0
  Y  Y6  1  0.415  0.998  0.748  1.0
  Cu  Cu7  1  0.859  0.335  0.428  1.0
  Cu  Cu8  1  0.811  0.999  0.569  1.0
  Cu  Cu9  1  0.476  0.334  0.569  1.0
  Te  Te10  1  0.127  0.998  0.618  1.0
  Te  Te11  1  0.293  0.001  0.125  1.0
  Te  Te12  1  0.798  0.338  0.619  1.0
  Te  Te13  1  0.958  0.333  0.125  1.0
  Te  Te14  1  0.459  0.667  0.617  1.0
  Te  Te15  1  0.625  0.667  0.125  1.0
  Te  Te16  1  0.376  0.333  0.874  1.0
  Te  Te17  1  0.536  0.332  0.380  1.0
  Te  Te18  1  0.041  0.665  0.874  1.0
  Te  Te19  1  0.207  0.667  0.381  1.0
  Te  Te20  1  0.708  0.000  0.874  1.0
  Te  Te21  1  0.873  0.996  0.380  1.0
[/CIF]
.