The crystal structure described by Ho7Cu3Te12 crystallizes in the triclinic P1 space group. There are seven inequivalent Ho sites. In the first Ho site, Ho(1) is bonded to one Te(10), one Te(12), one Te(3), one Te(6), one Te(7), and one Te(9) atom to form distorted HoTe6 octahedra that share  a cornercorner with one Ho(2)Te6 octahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  an edgeedge with one Ho(2)Te6 octahedra, edges with three equivalent Ho(4)Te6 octahedra, and edges with three equivalent Ho(6)Te6 octahedra. The corner-sharing octahedral tilt angles are 1°. In the second Ho site, Ho(2) is bonded to one Te(10), one Te(11), one Te(3), one Te(4), one Te(7), and one Te(8) atom to form a mixture of corner and edge-sharing HoTe6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the third Ho site, Ho(3) is bonded to one Te(1), one Te(11), one Te(2), one Te(4), one Te(5), and one Te(8) atom to form distorted HoTe6 octahedra that share  a cornercorner with one Ho(2)Te6 octahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  an edgeedge with one Ho(2)Te6 octahedra, edges with three equivalent Ho(5)Te6 octahedra, edges with three equivalent Ho(7)Te6 octahedra,  an edgeedge with one Cu(2)Te4 tetrahedra, and  an edgeedge with one Cu(3)Te4 tetrahedra. The corner-sharing octahedral tilt angles are 1°. In the fourth Ho site, Ho(4) is bonded to one Te(10), one Te(12), one Te(3), one Te(6), one Te(7), and one Te(9) atom to form distorted HoTe6 octahedra that share  a cornercorner with one Ho(2)Te6 octahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  an edgeedge with one Ho(2)Te6 octahedra, edges with three equivalent Ho(1)Te6 octahedra, and edges with three equivalent Ho(6)Te6 octahedra. The corner-sharing octahedra are not tilted. In the fifth Ho site, Ho(5) is bonded to one Te(1), one Te(11), one Te(2), one Te(4), one Te(5), and one Te(8) atom to form distorted HoTe6 octahedra that share  a cornercorner with one Ho(2)Te6 octahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  an edgeedge with one Ho(2)Te6 octahedra, edges with three equivalent Ho(3)Te6 octahedra, edges with three equivalent Ho(7)Te6 octahedra,  an edgeedge with one Cu(2)Te4 tetrahedra, and  an edgeedge with one Cu(3)Te4 tetrahedra. The corner-sharing octahedral tilt angles are 2°. In the sixth Ho site, Ho(6) is bonded to one Te(10), one Te(12), one Te(3), one Te(6), one Te(7), and one Te(9) atom to form distorted HoTe6 octahedra that share  a cornercorner with one Ho(2)Te6 octahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  an edgeedge with one Ho(2)Te6 octahedra, edges with three equivalent Ho(1)Te6 octahedra, and edges with three equivalent Ho(4)Te6 octahedra. The corner-sharing octahedral tilt angles are 1°. In the seventh Ho site, Ho(7) is bonded to one Te(1), one Te(11), one Te(2), one Te(4), one Te(5), and one Te(8) atom to form distorted HoTe6 octahedra that share  a cornercorner with one Ho(2)Te6 octahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  an edgeedge with one Ho(2)Te6 octahedra, edges with three equivalent Ho(3)Te6 octahedra, edges with three equivalent Ho(5)Te6 octahedra,  an edgeedge with one Cu(2)Te4 tetrahedra, and  an edgeedge with one Cu(3)Te4 tetrahedra. The corner-sharing octahedral tilt angles are 1°. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 4-coordinate geometry to one Te(12), one Te(2), one Te(6), and one Te(9) atom. In the second Cu site, Cu(2) is bonded to one Te(1), one Te(2), one Te(5), and one Te(9) atom to form distorted CuTe4 tetrahedra that share  a cornercorner with one Ho(1)Te6 octahedra,  a cornercorner with one Ho(3)Te6 octahedra,  a cornercorner with one Ho(4)Te6 octahedra,  a cornercorner with one Ho(5)Te6 octahedra,  a cornercorner with one Ho(6)Te6 octahedra,  a cornercorner with one Ho(7)Te6 octahedra, corners with three equivalent Cu(3)Te4 tetrahedra,  an edgeedge with one Ho(3)Te6 octahedra,  an edgeedge with one Ho(5)Te6 octahedra, and  an edgeedge with one Ho(7)Te6 octahedra. The corner-sharing octahedral tilt angles range from 22-55°. In the third Cu site, Cu(3) is bonded to one Te(1), one Te(2), one Te(5), and one Te(6) atom to form distorted CuTe4 tetrahedra that share  a cornercorner with one Ho(1)Te6 octahedra,  a cornercorner with one Ho(3)Te6 octahedra,  a cornercorner with one Ho(4)Te6 octahedra,  a cornercorner with one Ho(5)Te6 octahedra,  a cornercorner with one Ho(6)Te6 octahedra,  a cornercorner with one Ho(7)Te6 octahedra, corners with three equivalent Cu(2)Te4 tetrahedra,  an edgeedge with one Ho(3)Te6 octahedra,  an edgeedge with one Ho(5)Te6 octahedra, and  an edgeedge with one Ho(7)Te6 octahedra. The corner-sharing octahedral tilt angles range from 22-56°. There are twelve inequivalent Te sites. In the first Te site, Te(1) is bonded to one Ho(3), one Ho(5), one Ho(7), one Cu(2), and one Cu(3) atom to form TeHo3Cu2 square pyramids that share  a cornercorner with one Te(2)Ho3Cu3 octahedra,  a cornercorner with one Te(5)Ho3Cu2 square pyramid,  a cornercorner with one Te(6)Ho3Cu2 square pyramid,  a cornercorner with one Te(9)Ho3Cu2 square pyramid, edges with two equivalent Te(2)Ho3Cu3 octahedra, and edges with two equivalent Te(5)Ho3Cu2 square pyramids. The corner-sharing octahedral tilt angles are 93°. In the second Te site, Te(2) is bonded to one Ho(3), one Ho(5), one Ho(7), one Cu(1), one Cu(2), and one Cu(3) atom to form a mixture of distorted corner and edge-sharing TeHo3Cu3 octahedra. In the third Te site, Te(3) is bonded in a rectangular see-saw-like geometry to one Ho(1), one Ho(2), one Ho(4), and one Ho(6) atom. In the fourth Te site, Te(4) is bonded in a rectangular see-saw-like geometry to one Ho(2), one Ho(3), one Ho(5), and one Ho(7) atom. In the fifth Te site, Te(5) is bonded to one Ho(3), one Ho(5), one Ho(7), one Cu(2), and one Cu(3) atom to form TeHo3Cu2 square pyramids that share  a cornercorner with one Te(2)Ho3Cu3 octahedra,  a cornercorner with one Te(1)Ho3Cu2 square pyramid,  a cornercorner with one Te(6)Ho3Cu2 square pyramid,  a cornercorner with one Te(9)Ho3Cu2 square pyramid, edges with two equivalent Te(2)Ho3Cu3 octahedra, and edges with two equivalent Te(1)Ho3Cu2 square pyramids. The corner-sharing octahedral tilt angles are 93°. In the sixth Te site, Te(6) is bonded to one Ho(1), one Ho(4), one Ho(6), one Cu(1), and one Cu(3) atom to form distorted TeHo3Cu2 square pyramids that share  a cornercorner with one Te(1)Ho3Cu2 square pyramid,  a cornercorner with one Te(5)Ho3Cu2 square pyramid, corners with two equivalent Te(9)Ho3Cu2 square pyramids,  an edgeedge with one Te(2)Ho3Cu3 octahedra, and  an edgeedge with one Te(9)Ho3Cu2 square pyramid. In the seventh Te site, Te(7) is bonded in a rectangular see-saw-like geometry to one Ho(1), one Ho(2), one Ho(4), and one Ho(6) atom. In the eighth Te site, Te(8) is bonded in a rectangular see-saw-like geometry to one Ho(2), one Ho(3), one Ho(5), and one Ho(7) atom. In the ninth Te site, Te(9) is bonded to one Ho(1), one Ho(4), one Ho(6), one Cu(1), and one Cu(2) atom to form distorted TeHo3Cu2 square pyramids that share  a cornercorner with one Te(1)Ho3Cu2 square pyramid,  a cornercorner with one Te(5)Ho3Cu2 square pyramid, corners with two equivalent Te(6)Ho3Cu2 square pyramids,  an edgeedge with one Te(2)Ho3Cu3 octahedra, and  an edgeedge with one Te(6)Ho3Cu2 square pyramid. In the tenth Te site, Te(10) is bonded in a rectangular see-saw-like geometry to one Ho(1), one Ho(2), one Ho(4), and one Ho(6) atom. In the eleventh Te site, Te(11) is bonded in a rectangular see-saw-like geometry to one Ho(2), one Ho(3), one Ho(5), and one Ho(7) atom. In the twelfth Te site, Te(12) is bonded in a rectangular see-saw-like geometry to one Ho(1), one Ho(4), one Ho(6), and one Cu(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ho7(CuTe4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.487
_cell_length_b   7.486
_cell_length_c   14.180
_cell_angle_alpha   94.967
_cell_angle_beta   95.059
_cell_angle_gamma   119.990
_symmetry_Int_Tables_number   1
_cell_volume   677.803
_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
  Ho  Ho0  1  0.576  0.582  0.744  1.0
  Ho  Ho1  1  0.332  0.664  0.997  1.0
  Ho  Ho2  1  0.090  0.757  0.253  1.0
  Ho  Ho3  1  0.246  0.908  0.745  1.0
  Ho  Ho4  1  0.749  0.078  0.253  1.0
  Ho  Ho5  1  0.919  0.254  0.745  1.0
  Ho  Ho6  1  0.418  0.418  0.253  1.0
  Cu  Cu7  1  0.862  0.528  0.581  1.0
  Cu  Cu8  1  0.474  0.141  0.428  1.0
  Cu  Cu9  1  0.809  0.811  0.428  1.0
  Te  Te10  1  0.128  0.132  0.383  1.0
  Te  Te11  1  0.800  0.461  0.383  1.0
  Te  Te12  1  0.956  0.624  0.874  1.0
  Te  Te13  1  0.708  0.707  0.127  1.0
  Te  Te14  1  0.457  0.790  0.384  1.0
  Te  Te15  1  0.873  0.878  0.619  1.0
  Te  Te16  1  0.624  0.957  0.874  1.0
  Te  Te17  1  0.380  0.043  0.126  1.0
  Te  Te18  1  0.535  0.203  0.619  1.0
  Te  Te19  1  0.291  0.291  0.873  1.0
  Te  Te20  1  0.044  0.379  0.128  1.0
  Te  Te21  1  0.208  0.538  0.618  1.0
[/CIF]
.
The crystal structure described by Ho7Cu3Te12 crystallizes in the triclinic P1 space group. There are seven inequivalent Ho sites. In the first Ho site, Ho(1) is bonded to one Te(10), one Te(12), one Te(3), one Te(6), one Te(7), and one Te(9) atom to form distorted HoTe6 octahedra that share  a cornercorner with one Ho(2)Te6 octahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  an edgeedge with one Ho(2)Te6 octahedra, edges with three equivalent Ho(4)Te6 octahedra, and edges with three equivalent Ho(6)Te6 octahedra. The corner-sharing octahedral tilt angles are 1°. In the second Ho site, Ho(2) is bonded to one Te(10), one Te(11), one Te(3), one Te(4), one Te(7), and one Te(8) atom to form a mixture of corner and edge-sharing HoTe6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the third Ho site, Ho(3) is bonded to one Te(1), one Te(11), one Te(2), one Te(4), one Te(5), and one Te(8) atom to form distorted HoTe6 octahedra that share  a cornercorner with one Ho(2)Te6 octahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  an edgeedge with one Ho(2)Te6 octahedra, edges with three equivalent Ho(5)Te6 octahedra, edges with three equivalent Ho(7)Te6 octahedra,  an edgeedge with one Cu(2)Te4 tetrahedra, and  an edgeedge with one Cu(3)Te4 tetrahedra. The corner-sharing octahedral tilt angles are 1°. In the fourth Ho site, Ho(4) is bonded to one Te(10), one Te(12), one Te(3), one Te(6), one Te(7), and one Te(9) atom to form distorted HoTe6 octahedra that share  a cornercorner with one Ho(2)Te6 octahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  an edgeedge with one Ho(2)Te6 octahedra, edges with three equivalent Ho(1)Te6 octahedra, and edges with three equivalent Ho(6)Te6 octahedra. The corner-sharing octahedra are not tilted. In the fifth Ho site, Ho(5) is bonded to one Te(1), one Te(11), one Te(2), one Te(4), one Te(5), and one Te(8) atom to form distorted HoTe6 octahedra that share  a cornercorner with one Ho(2)Te6 octahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  an edgeedge with one Ho(2)Te6 octahedra, edges with three equivalent Ho(3)Te6 octahedra, edges with three equivalent Ho(7)Te6 octahedra,  an edgeedge with one Cu(2)Te4 tetrahedra, and  an edgeedge with one Cu(3)Te4 tetrahedra. The corner-sharing octahedral tilt angles are 2°. In the sixth Ho site, Ho(6) is bonded to one Te(10), one Te(12), one Te(3), one Te(6), one Te(7), and one Te(9) atom to form distorted HoTe6 octahedra that share  a cornercorner with one Ho(2)Te6 octahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  an edgeedge with one Ho(2)Te6 octahedra, edges with three equivalent Ho(1)Te6 octahedra, and edges with three equivalent Ho(4)Te6 octahedra. The corner-sharing octahedral tilt angles are 1°. In the seventh Ho site, Ho(7) is bonded to one Te(1), one Te(11), one Te(2), one Te(4), one Te(5), and one Te(8) atom to form distorted HoTe6 octahedra that share  a cornercorner with one Ho(2)Te6 octahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  an edgeedge with one Ho(2)Te6 octahedra, edges with three equivalent Ho(3)Te6 octahedra, edges with three equivalent Ho(5)Te6 octahedra,  an edgeedge with one Cu(2)Te4 tetrahedra, and  an edgeedge with one Cu(3)Te4 tetrahedra. The corner-sharing octahedral tilt angles are 1°. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 4-coordinate geometry to one Te(12), one Te(2), one Te(6), and one Te(9) atom. In the second Cu site, Cu(2) is bonded to one Te(1), one Te(2), one Te(5), and one Te(9) atom to form distorted CuTe4 tetrahedra that share  a cornercorner with one Ho(1)Te6 octahedra,  a cornercorner with one Ho(3)Te6 octahedra,  a cornercorner with one Ho(4)Te6 octahedra,  a cornercorner with one Ho(5)Te6 octahedra,  a cornercorner with one Ho(6)Te6 octahedra,  a cornercorner with one Ho(7)Te6 octahedra, corners with three equivalent Cu(3)Te4 tetrahedra,  an edgeedge with one Ho(3)Te6 octahedra,  an edgeedge with one Ho(5)Te6 octahedra, and  an edgeedge with one Ho(7)Te6 octahedra. The corner-sharing octahedral tilt angles range from 22-55°. In the third Cu site, Cu(3) is bonded to one Te(1), one Te(2), one Te(5), and one Te(6) atom to form distorted CuTe4 tetrahedra that share  a cornercorner with one Ho(1)Te6 octahedra,  a cornercorner with one Ho(3)Te6 octahedra,  a cornercorner with one Ho(4)Te6 octahedra,  a cornercorner with one Ho(5)Te6 octahedra,  a cornercorner with one Ho(6)Te6 octahedra,  a cornercorner with one Ho(7)Te6 octahedra, corners with three equivalent Cu(2)Te4 tetrahedra,  an edgeedge with one Ho(3)Te6 octahedra,  an edgeedge with one Ho(5)Te6 octahedra, and  an edgeedge with one Ho(7)Te6 octahedra. The corner-sharing octahedral tilt angles range from 22-56°. There are twelve inequivalent Te sites. In the first Te site, Te(1) is bonded to one Ho(3), one Ho(5), one Ho(7), one Cu(2), and one Cu(3) atom to form TeHo3Cu2 square pyramids that share  a cornercorner with one Te(2)Ho3Cu3 octahedra,  a cornercorner with one Te(5)Ho3Cu2 square pyramid,  a cornercorner with one Te(6)Ho3Cu2 square pyramid,  a cornercorner with one Te(9)Ho3Cu2 square pyramid, edges with two equivalent Te(2)Ho3Cu3 octahedra, and edges with two equivalent Te(5)Ho3Cu2 square pyramids. The corner-sharing octahedral tilt angles are 93°. In the second Te site, Te(2) is bonded to one Ho(3), one Ho(5), one Ho(7), one Cu(1), one Cu(2), and one Cu(3) atom to form a mixture of distorted corner and edge-sharing TeHo3Cu3 octahedra. In the third Te site, Te(3) is bonded in a rectangular see-saw-like geometry to one Ho(1), one Ho(2), one Ho(4), and one Ho(6) atom. In the fourth Te site, Te(4) is bonded in a rectangular see-saw-like geometry to one Ho(2), one Ho(3), one Ho(5), and one Ho(7) atom. In the fifth Te site, Te(5) is bonded to one Ho(3), one Ho(5), one Ho(7), one Cu(2), and one Cu(3) atom to form TeHo3Cu2 square pyramids that share  a cornercorner with one Te(2)Ho3Cu3 octahedra,  a cornercorner with one Te(1)Ho3Cu2 square pyramid,  a cornercorner with one Te(6)Ho3Cu2 square pyramid,  a cornercorner with one Te(9)Ho3Cu2 square pyramid, edges with two equivalent Te(2)Ho3Cu3 octahedra, and edges with two equivalent Te(1)Ho3Cu2 square pyramids. The corner-sharing octahedral tilt angles are 93°. In the sixth Te site, Te(6) is bonded to one Ho(1), one Ho(4), one Ho(6), one Cu(1), and one Cu(3) atom to form distorted TeHo3Cu2 square pyramids that share  a cornercorner with one Te(1)Ho3Cu2 square pyramid,  a cornercorner with one Te(5)Ho3Cu2 square pyramid, corners with two equivalent Te(9)Ho3Cu2 square pyramids,  an edgeedge with one Te(2)Ho3Cu3 octahedra, and  an edgeedge with one Te(9)Ho3Cu2 square pyramid. In the seventh Te site, Te(7) is bonded in a rectangular see-saw-like geometry to one Ho(1), one Ho(2), one Ho(4), and one Ho(6) atom. In the eighth Te site, Te(8) is bonded in a rectangular see-saw-like geometry to one Ho(2), one Ho(3), one Ho(5), and one Ho(7) atom. In the ninth Te site, Te(9) is bonded to one Ho(1), one Ho(4), one Ho(6), one Cu(1), and one Cu(2) atom to form distorted TeHo3Cu2 square pyramids that share  a cornercorner with one Te(1)Ho3Cu2 square pyramid,  a cornercorner with one Te(5)Ho3Cu2 square pyramid, corners with two equivalent Te(6)Ho3Cu2 square pyramids,  an edgeedge with one Te(2)Ho3Cu3 octahedra, and  an edgeedge with one Te(6)Ho3Cu2 square pyramid. In the tenth Te site, Te(10) is bonded in a rectangular see-saw-like geometry to one Ho(1), one Ho(2), one Ho(4), and one Ho(6) atom. In the eleventh Te site, Te(11) is bonded in a rectangular see-saw-like geometry to one Ho(2), one Ho(3), one Ho(5), and one Ho(7) atom. In the twelfth Te site, Te(12) is bonded in a rectangular see-saw-like geometry to one Ho(1), one Ho(4), one Ho(6), and one Cu(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ho7(CuTe4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.487
_cell_length_b   7.486
_cell_length_c   14.180
_cell_angle_alpha   94.967
_cell_angle_beta   95.059
_cell_angle_gamma   119.990
_symmetry_Int_Tables_number   1
_cell_volume   677.803
_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
  Ho  Ho0  1  0.576  0.582  0.744  1.0
  Ho  Ho1  1  0.332  0.664  0.997  1.0
  Ho  Ho2  1  0.090  0.757  0.253  1.0
  Ho  Ho3  1  0.246  0.908  0.745  1.0
  Ho  Ho4  1  0.749  0.078  0.253  1.0
  Ho  Ho5  1  0.919  0.254  0.745  1.0
  Ho  Ho6  1  0.418  0.418  0.253  1.0
  Cu  Cu7  1  0.862  0.528  0.581  1.0
  Cu  Cu8  1  0.474  0.141  0.428  1.0
  Cu  Cu9  1  0.809  0.811  0.428  1.0
  Te  Te10  1  0.128  0.132  0.383  1.0
  Te  Te11  1  0.800  0.461  0.383  1.0
  Te  Te12  1  0.956  0.624  0.874  1.0
  Te  Te13  1  0.708  0.707  0.127  1.0
  Te  Te14  1  0.457  0.790  0.384  1.0
  Te  Te15  1  0.873  0.878  0.619  1.0
  Te  Te16  1  0.624  0.957  0.874  1.0
  Te  Te17  1  0.380  0.043  0.126  1.0
  Te  Te18  1  0.535  0.203  0.619  1.0
  Te  Te19  1  0.291  0.291  0.873  1.0
  Te  Te20  1  0.044  0.379  0.128  1.0
  Te  Te21  1  0.208  0.538  0.618  1.0
[/CIF]
.