The structure described by Tb7Cu3Te12 crystallizes in the triclinic P1 space group. There are seven inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to one Cu(1), one Te(1), one Te(10), one Te(12), one Te(3), one Te(6), and one Te(7) atom to form distorted TbCuTe6 octahedra that share  a cornercorner with one Tb(2)Te6 octahedra,  a cornercorner with one Te(2)Tb3Cu3 pentagonal pyramid,  a cornercorner with one Te(10)Tb3Cu2 square pyramid,  a cornercorner with one Te(6)Tb3Cu2 square pyramid,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  an edgeedge with one Tb(2)Te6 octahedra, edges with two equivalent Tb(4)CuTe6 octahedra, edges with two equivalent Tb(6)CuTe6 octahedra,  a faceface with one Tb(4)CuTe6 octahedra, and  a faceface with one Tb(6)CuTe6 octahedra. The corner-sharing octahedral tilt angles are 1°. In the second Tb site, Tb(2) is bonded to one Te(1), one Te(11), one Te(3), one Te(4), one Te(7), and one Te(8) atom to form TbTe6 octahedra that share  a cornercorner with one Tb(1)CuTe6 octahedra,  a cornercorner with one Tb(4)CuTe6 octahedra,  a cornercorner with one Tb(6)CuTe6 octahedra,  a cornercorner with one Tb(3)Te6 octahedra,  a cornercorner with one Tb(5)Te6 octahedra,  a cornercorner with one Tb(7)Te6 octahedra,  an edgeedge with one Tb(1)CuTe6 octahedra,  an edgeedge with one Tb(4)CuTe6 octahedra,  an edgeedge with one Tb(6)CuTe6 octahedra,  an edgeedge with one Tb(3)Te6 octahedra,  an edgeedge with one Tb(5)Te6 octahedra, and  an edgeedge with one Tb(7)Te6 octahedra. The corner-sharing octahedral tilt angles range from 1-2°. In the third Tb site, Tb(3) is bonded to one Te(11), one Te(2), one Te(4), one Te(5), one Te(8), and one Te(9) atom to form distorted TbTe6 octahedra that share  a cornercorner with one Tb(2)Te6 octahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  an edgeedge with one Tb(2)Te6 octahedra, edges with three equivalent Tb(5)Te6 octahedra, edges with three equivalent Tb(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 Tb site, Tb(4) is bonded to one Cu(1), one Te(1), one Te(10), one Te(12), one Te(3), one Te(6), and one Te(7) atom to form distorted TbCuTe6 octahedra that share  a cornercorner with one Tb(2)Te6 octahedra,  a cornercorner with one Te(2)Tb3Cu3 pentagonal pyramid,  a cornercorner with one Te(10)Tb3Cu2 square pyramid,  a cornercorner with one Te(6)Tb3Cu2 square pyramid,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  an edgeedge with one Tb(2)Te6 octahedra, edges with two equivalent Tb(1)CuTe6 octahedra, edges with two equivalent Tb(6)CuTe6 octahedra,  a faceface with one Tb(1)CuTe6 octahedra, and  a faceface with one Tb(6)CuTe6 octahedra. The corner-sharing octahedral tilt angles are 1°. In the fifth Tb site, Tb(5) is bonded to one Te(11), one Te(2), one Te(4), one Te(5), one Te(8), and one Te(9) atom to form distorted TbTe6 octahedra that share  a cornercorner with one Tb(2)Te6 octahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  an edgeedge with one Tb(2)Te6 octahedra, edges with three equivalent Tb(3)Te6 octahedra, edges with three equivalent Tb(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 Tb site, Tb(6) is bonded to one Cu(1), one Te(1), one Te(10), one Te(12), one Te(3), one Te(6), and one Te(7) atom to form distorted TbCuTe6 octahedra that share  a cornercorner with one Tb(2)Te6 octahedra,  a cornercorner with one Te(2)Tb3Cu3 pentagonal pyramid,  a cornercorner with one Te(10)Tb3Cu2 square pyramid,  a cornercorner with one Te(6)Tb3Cu2 square pyramid,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  an edgeedge with one Tb(2)Te6 octahedra, edges with two equivalent Tb(1)CuTe6 octahedra, edges with two equivalent Tb(4)CuTe6 octahedra,  a faceface with one Tb(1)CuTe6 octahedra, and  a faceface with one Tb(4)CuTe6 octahedra. The corner-sharing octahedral tilt angles are 1°. In the seventh Tb site, Tb(7) is bonded to one Te(11), one Te(2), one Te(4), one Te(5), one Te(8), and one Te(9) atom to form distorted TbTe6 octahedra that share  a cornercorner with one Tb(2)Te6 octahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  an edgeedge with one Tb(2)Te6 octahedra, edges with three equivalent Tb(3)Te6 octahedra, edges with three equivalent Tb(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 7-coordinate geometry to one Tb(1), one Tb(4), one Tb(6), one Te(10), one Te(12), one Te(2), and one Te(6) atom. In the second Cu site, Cu(2) is bonded to one Te(10), one Te(2), one Te(5), and one Te(9) atom to form distorted CuTe4 tetrahedra that share  a cornercorner with one Tb(1)CuTe6 octahedra,  a cornercorner with one Tb(4)CuTe6 octahedra,  a cornercorner with one Tb(6)CuTe6 octahedra,  a cornercorner with one Tb(3)Te6 octahedra,  a cornercorner with one Tb(5)Te6 octahedra,  a cornercorner with one Tb(7)Te6 octahedra, corners with three equivalent Cu(3)Te4 tetrahedra,  an edgeedge with one Tb(3)Te6 octahedra,  an edgeedge with one Tb(5)Te6 octahedra, and  an edgeedge with one Tb(7)Te6 octahedra. The corner-sharing octahedral tilt angles range from 23-55°. In the third Cu site, Cu(3) is bonded to one Te(2), one Te(5), one Te(6), and one Te(9) atom to form distorted CuTe4 tetrahedra that share  a cornercorner with one Tb(1)CuTe6 octahedra,  a cornercorner with one Tb(4)CuTe6 octahedra,  a cornercorner with one Tb(6)CuTe6 octahedra,  a cornercorner with one Tb(3)Te6 octahedra,  a cornercorner with one Tb(5)Te6 octahedra,  a cornercorner with one Tb(7)Te6 octahedra, corners with three equivalent Cu(2)Te4 tetrahedra,  an edgeedge with one Tb(3)Te6 octahedra,  an edgeedge with one Tb(5)Te6 octahedra, and  an edgeedge with one Tb(7)Te6 octahedra. The corner-sharing octahedral tilt angles range from 22-55°. There are twelve inequivalent Te sites. In the first Te site, Te(1) is bonded in a rectangular see-saw-like geometry to one Tb(1), one Tb(2), one Tb(4), and one Tb(6) atom. In the second Te site, Te(2) is bonded to one Tb(3), one Tb(5), one Tb(7), one Cu(1), one Cu(2), and one Cu(3) atom to form distorted TeTb3Cu3 pentagonal pyramids that share  a cornercorner with one Tb(1)CuTe6 octahedra,  a cornercorner with one Tb(4)CuTe6 octahedra,  a cornercorner with one Tb(6)CuTe6 octahedra,  a cornercorner with one Te(5)Tb3Cu2 square pyramid,  a cornercorner with one Te(9)Tb3Cu2 square pyramid,  an edgeedge with one Te(10)Tb3Cu2 square pyramid,  an edgeedge with one Te(6)Tb3Cu2 square pyramid, edges with two equivalent Te(5)Tb3Cu2 square pyramids, and edges with two equivalent Te(9)Tb3Cu2 square pyramids. The corner-sharing octahedral tilt angles range from 47-48°. In the third Te site, Te(3) is bonded in a rectangular see-saw-like geometry to one Tb(1), one Tb(2), one Tb(4), and one Tb(6) atom. In the fourth Te site, Te(4) is bonded in a rectangular see-saw-like geometry to one Tb(2), one Tb(3), one Tb(5), and one Tb(7) atom. In the fifth Te site, Te(5) is bonded to one Tb(3), one Tb(5), one Tb(7), one Cu(2), and one Cu(3) atom to form TeTb3Cu2 square pyramids that share  a cornercorner with one Te(2)Tb3Cu3 pentagonal pyramid,  a cornercorner with one Te(10)Tb3Cu2 square pyramid,  a cornercorner with one Te(6)Tb3Cu2 square pyramid,  a cornercorner with one Te(9)Tb3Cu2 square pyramid, edges with two equivalent Te(2)Tb3Cu3 pentagonal pyramids, and edges with two equivalent Te(9)Tb3Cu2 square pyramids. In the sixth Te site, Te(6) is bonded to one Tb(1), one Tb(4), one Tb(6), one Cu(1), and one Cu(3) atom to form distorted TeTb3Cu2 square pyramids that share  a cornercorner with one Tb(1)CuTe6 octahedra,  a cornercorner with one Tb(4)CuTe6 octahedra,  a cornercorner with one Tb(6)CuTe6 octahedra,  a cornercorner with one Te(5)Tb3Cu2 square pyramid,  a cornercorner with one Te(9)Tb3Cu2 square pyramid, corners with two equivalent Te(10)Tb3Cu2 square pyramids,  an edgeedge with one Te(2)Tb3Cu3 pentagonal pyramid, and  an edgeedge with one Te(10)Tb3Cu2 square pyramid. The corner-sharing octahedral tilt angles range from 54-120°. In the seventh Te site, Te(7) is bonded in a rectangular see-saw-like geometry to one Tb(1), one Tb(2), one Tb(4), and one Tb(6) atom. In the eighth Te site, Te(8) is bonded in a rectangular see-saw-like geometry to one Tb(2), one Tb(3), one Tb(5), and one Tb(7) atom. In the ninth Te site, Te(9) is bonded to one Tb(3), one Tb(5), one Tb(7), one Cu(2), and one Cu(3) atom to form TeTb3Cu2 square pyramids that share  a cornercorner with one Te(2)Tb3Cu3 pentagonal pyramid,  a cornercorner with one Te(10)Tb3Cu2 square pyramid,  a cornercorner with one Te(5)Tb3Cu2 square pyramid,  a cornercorner with one Te(6)Tb3Cu2 square pyramid, edges with two equivalent Te(2)Tb3Cu3 pentagonal pyramids, and edges with two equivalent Te(5)Tb3Cu2 square pyramids. In the tenth Te site, Te(10) is bonded to one Tb(1), one Tb(4), one Tb(6), one Cu(1), and one Cu(2) atom to form distorted TeTb3Cu2 square pyramids that share  a cornercorner with one Tb(1)CuTe6 octahedra,  a cornercorner with one Tb(4)CuTe6 octahedra,  a cornercorner with one Tb(6)CuTe6 octahedra,  a cornercorner with one Te(5)Tb3Cu2 square pyramid,  a cornercorner with one Te(9)Tb3Cu2 square pyramid, corners with two equivalent Te(6)Tb3Cu2 square pyramids,  an edgeedge with one Te(2)Tb3Cu3 pentagonal pyramid, and  an edgeedge with one Te(6)Tb3Cu2 square pyramid. The corner-sharing octahedral tilt angles range from 54-120°. In the eleventh Te site, Te(11) is bonded in a rectangular see-saw-like geometry to one Tb(2), one Tb(3), one Tb(5), and one Tb(7) atom. In the twelfth Te site, Te(12) is bonded in a rectangular see-saw-like geometry to one Tb(1), one Tb(4), one Tb(6), and one Cu(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Tb7(CuTe4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.537
_cell_length_b   7.540
_cell_length_c   14.268
_cell_angle_alpha   94.986
_cell_angle_beta   95.008
_cell_angle_gamma   119.980
_symmetry_Int_Tables_number   1
_cell_volume   691.606
_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
  Tb  Tb0  1  0.577  0.582  0.743  1.0
  Tb  Tb1  1  0.332  0.664  0.997  1.0
  Tb  Tb2  1  0.089  0.757  0.254  1.0
  Tb  Tb3  1  0.247  0.909  0.744  1.0
  Tb  Tb4  1  0.750  0.079  0.254  1.0
  Tb  Tb5  1  0.918  0.253  0.744  1.0
  Tb  Tb6  1  0.417  0.418  0.254  1.0
  Cu  Cu7  1  0.863  0.528  0.581  1.0
  Cu  Cu8  1  0.473  0.140  0.427  1.0
  Cu  Cu9  1  0.808  0.811  0.427  1.0
  Te  Te10  1  0.291  0.291  0.873  1.0
  Te  Te11  1  0.799  0.461  0.384  1.0
  Te  Te12  1  0.956  0.624  0.874  1.0
  Te  Te13  1  0.707  0.707  0.127  1.0
  Te  Te14  1  0.458  0.792  0.385  1.0
  Te  Te15  1  0.873  0.876  0.617  1.0
  Te  Te16  1  0.624  0.957  0.873  1.0
  Te  Te17  1  0.379  0.043  0.127  1.0
  Te  Te18  1  0.127  0.131  0.384  1.0
  Te  Te19  1  0.536  0.204  0.617  1.0
  Te  Te20  1  0.044  0.379  0.128  1.0
  Te  Te21  1  0.208  0.539  0.617  1.0
[/CIF]
.
The structure described by Tb7Cu3Te12 crystallizes in the triclinic P1 space group. There are seven inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to one Cu(1), one Te(1), one Te(10), one Te(12), one Te(3), one Te(6), and one Te(7) atom to form distorted TbCuTe6 octahedra that share  a cornercorner with one Tb(2)Te6 octahedra,  a cornercorner with one Te(2)Tb3Cu3 pentagonal pyramid,  a cornercorner with one Te(10)Tb3Cu2 square pyramid,  a cornercorner with one Te(6)Tb3Cu2 square pyramid,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  an edgeedge with one Tb(2)Te6 octahedra, edges with two equivalent Tb(4)CuTe6 octahedra, edges with two equivalent Tb(6)CuTe6 octahedra,  a faceface with one Tb(4)CuTe6 octahedra, and  a faceface with one Tb(6)CuTe6 octahedra. The corner-sharing octahedral tilt angles are 1°. In the second Tb site, Tb(2) is bonded to one Te(1), one Te(11), one Te(3), one Te(4), one Te(7), and one Te(8) atom to form TbTe6 octahedra that share  a cornercorner with one Tb(1)CuTe6 octahedra,  a cornercorner with one Tb(4)CuTe6 octahedra,  a cornercorner with one Tb(6)CuTe6 octahedra,  a cornercorner with one Tb(3)Te6 octahedra,  a cornercorner with one Tb(5)Te6 octahedra,  a cornercorner with one Tb(7)Te6 octahedra,  an edgeedge with one Tb(1)CuTe6 octahedra,  an edgeedge with one Tb(4)CuTe6 octahedra,  an edgeedge with one Tb(6)CuTe6 octahedra,  an edgeedge with one Tb(3)Te6 octahedra,  an edgeedge with one Tb(5)Te6 octahedra, and  an edgeedge with one Tb(7)Te6 octahedra. The corner-sharing octahedral tilt angles range from 1-2°. In the third Tb site, Tb(3) is bonded to one Te(11), one Te(2), one Te(4), one Te(5), one Te(8), and one Te(9) atom to form distorted TbTe6 octahedra that share  a cornercorner with one Tb(2)Te6 octahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  an edgeedge with one Tb(2)Te6 octahedra, edges with three equivalent Tb(5)Te6 octahedra, edges with three equivalent Tb(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 Tb site, Tb(4) is bonded to one Cu(1), one Te(1), one Te(10), one Te(12), one Te(3), one Te(6), and one Te(7) atom to form distorted TbCuTe6 octahedra that share  a cornercorner with one Tb(2)Te6 octahedra,  a cornercorner with one Te(2)Tb3Cu3 pentagonal pyramid,  a cornercorner with one Te(10)Tb3Cu2 square pyramid,  a cornercorner with one Te(6)Tb3Cu2 square pyramid,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  an edgeedge with one Tb(2)Te6 octahedra, edges with two equivalent Tb(1)CuTe6 octahedra, edges with two equivalent Tb(6)CuTe6 octahedra,  a faceface with one Tb(1)CuTe6 octahedra, and  a faceface with one Tb(6)CuTe6 octahedra. The corner-sharing octahedral tilt angles are 1°. In the fifth Tb site, Tb(5) is bonded to one Te(11), one Te(2), one Te(4), one Te(5), one Te(8), and one Te(9) atom to form distorted TbTe6 octahedra that share  a cornercorner with one Tb(2)Te6 octahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  an edgeedge with one Tb(2)Te6 octahedra, edges with three equivalent Tb(3)Te6 octahedra, edges with three equivalent Tb(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 Tb site, Tb(6) is bonded to one Cu(1), one Te(1), one Te(10), one Te(12), one Te(3), one Te(6), and one Te(7) atom to form distorted TbCuTe6 octahedra that share  a cornercorner with one Tb(2)Te6 octahedra,  a cornercorner with one Te(2)Tb3Cu3 pentagonal pyramid,  a cornercorner with one Te(10)Tb3Cu2 square pyramid,  a cornercorner with one Te(6)Tb3Cu2 square pyramid,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  an edgeedge with one Tb(2)Te6 octahedra, edges with two equivalent Tb(1)CuTe6 octahedra, edges with two equivalent Tb(4)CuTe6 octahedra,  a faceface with one Tb(1)CuTe6 octahedra, and  a faceface with one Tb(4)CuTe6 octahedra. The corner-sharing octahedral tilt angles are 1°. In the seventh Tb site, Tb(7) is bonded to one Te(11), one Te(2), one Te(4), one Te(5), one Te(8), and one Te(9) atom to form distorted TbTe6 octahedra that share  a cornercorner with one Tb(2)Te6 octahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  an edgeedge with one Tb(2)Te6 octahedra, edges with three equivalent Tb(3)Te6 octahedra, edges with three equivalent Tb(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 7-coordinate geometry to one Tb(1), one Tb(4), one Tb(6), one Te(10), one Te(12), one Te(2), and one Te(6) atom. In the second Cu site, Cu(2) is bonded to one Te(10), one Te(2), one Te(5), and one Te(9) atom to form distorted CuTe4 tetrahedra that share  a cornercorner with one Tb(1)CuTe6 octahedra,  a cornercorner with one Tb(4)CuTe6 octahedra,  a cornercorner with one Tb(6)CuTe6 octahedra,  a cornercorner with one Tb(3)Te6 octahedra,  a cornercorner with one Tb(5)Te6 octahedra,  a cornercorner with one Tb(7)Te6 octahedra, corners with three equivalent Cu(3)Te4 tetrahedra,  an edgeedge with one Tb(3)Te6 octahedra,  an edgeedge with one Tb(5)Te6 octahedra, and  an edgeedge with one Tb(7)Te6 octahedra. The corner-sharing octahedral tilt angles range from 23-55°. In the third Cu site, Cu(3) is bonded to one Te(2), one Te(5), one Te(6), and one Te(9) atom to form distorted CuTe4 tetrahedra that share  a cornercorner with one Tb(1)CuTe6 octahedra,  a cornercorner with one Tb(4)CuTe6 octahedra,  a cornercorner with one Tb(6)CuTe6 octahedra,  a cornercorner with one Tb(3)Te6 octahedra,  a cornercorner with one Tb(5)Te6 octahedra,  a cornercorner with one Tb(7)Te6 octahedra, corners with three equivalent Cu(2)Te4 tetrahedra,  an edgeedge with one Tb(3)Te6 octahedra,  an edgeedge with one Tb(5)Te6 octahedra, and  an edgeedge with one Tb(7)Te6 octahedra. The corner-sharing octahedral tilt angles range from 22-55°. There are twelve inequivalent Te sites. In the first Te site, Te(1) is bonded in a rectangular see-saw-like geometry to one Tb(1), one Tb(2), one Tb(4), and one Tb(6) atom. In the second Te site, Te(2) is bonded to one Tb(3), one Tb(5), one Tb(7), one Cu(1), one Cu(2), and one Cu(3) atom to form distorted TeTb3Cu3 pentagonal pyramids that share  a cornercorner with one Tb(1)CuTe6 octahedra,  a cornercorner with one Tb(4)CuTe6 octahedra,  a cornercorner with one Tb(6)CuTe6 octahedra,  a cornercorner with one Te(5)Tb3Cu2 square pyramid,  a cornercorner with one Te(9)Tb3Cu2 square pyramid,  an edgeedge with one Te(10)Tb3Cu2 square pyramid,  an edgeedge with one Te(6)Tb3Cu2 square pyramid, edges with two equivalent Te(5)Tb3Cu2 square pyramids, and edges with two equivalent Te(9)Tb3Cu2 square pyramids. The corner-sharing octahedral tilt angles range from 47-48°. In the third Te site, Te(3) is bonded in a rectangular see-saw-like geometry to one Tb(1), one Tb(2), one Tb(4), and one Tb(6) atom. In the fourth Te site, Te(4) is bonded in a rectangular see-saw-like geometry to one Tb(2), one Tb(3), one Tb(5), and one Tb(7) atom. In the fifth Te site, Te(5) is bonded to one Tb(3), one Tb(5), one Tb(7), one Cu(2), and one Cu(3) atom to form TeTb3Cu2 square pyramids that share  a cornercorner with one Te(2)Tb3Cu3 pentagonal pyramid,  a cornercorner with one Te(10)Tb3Cu2 square pyramid,  a cornercorner with one Te(6)Tb3Cu2 square pyramid,  a cornercorner with one Te(9)Tb3Cu2 square pyramid, edges with two equivalent Te(2)Tb3Cu3 pentagonal pyramids, and edges with two equivalent Te(9)Tb3Cu2 square pyramids. In the sixth Te site, Te(6) is bonded to one Tb(1), one Tb(4), one Tb(6), one Cu(1), and one Cu(3) atom to form distorted TeTb3Cu2 square pyramids that share  a cornercorner with one Tb(1)CuTe6 octahedra,  a cornercorner with one Tb(4)CuTe6 octahedra,  a cornercorner with one Tb(6)CuTe6 octahedra,  a cornercorner with one Te(5)Tb3Cu2 square pyramid,  a cornercorner with one Te(9)Tb3Cu2 square pyramid, corners with two equivalent Te(10)Tb3Cu2 square pyramids,  an edgeedge with one Te(2)Tb3Cu3 pentagonal pyramid, and  an edgeedge with one Te(10)Tb3Cu2 square pyramid. The corner-sharing octahedral tilt angles range from 54-120°. In the seventh Te site, Te(7) is bonded in a rectangular see-saw-like geometry to one Tb(1), one Tb(2), one Tb(4), and one Tb(6) atom. In the eighth Te site, Te(8) is bonded in a rectangular see-saw-like geometry to one Tb(2), one Tb(3), one Tb(5), and one Tb(7) atom. In the ninth Te site, Te(9) is bonded to one Tb(3), one Tb(5), one Tb(7), one Cu(2), and one Cu(3) atom to form TeTb3Cu2 square pyramids that share  a cornercorner with one Te(2)Tb3Cu3 pentagonal pyramid,  a cornercorner with one Te(10)Tb3Cu2 square pyramid,  a cornercorner with one Te(5)Tb3Cu2 square pyramid,  a cornercorner with one Te(6)Tb3Cu2 square pyramid, edges with two equivalent Te(2)Tb3Cu3 pentagonal pyramids, and edges with two equivalent Te(5)Tb3Cu2 square pyramids. In the tenth Te site, Te(10) is bonded to one Tb(1), one Tb(4), one Tb(6), one Cu(1), and one Cu(2) atom to form distorted TeTb3Cu2 square pyramids that share  a cornercorner with one Tb(1)CuTe6 octahedra,  a cornercorner with one Tb(4)CuTe6 octahedra,  a cornercorner with one Tb(6)CuTe6 octahedra,  a cornercorner with one Te(5)Tb3Cu2 square pyramid,  a cornercorner with one Te(9)Tb3Cu2 square pyramid, corners with two equivalent Te(6)Tb3Cu2 square pyramids,  an edgeedge with one Te(2)Tb3Cu3 pentagonal pyramid, and  an edgeedge with one Te(6)Tb3Cu2 square pyramid. The corner-sharing octahedral tilt angles range from 54-120°. In the eleventh Te site, Te(11) is bonded in a rectangular see-saw-like geometry to one Tb(2), one Tb(3), one Tb(5), and one Tb(7) atom. In the twelfth Te site, Te(12) is bonded in a rectangular see-saw-like geometry to one Tb(1), one Tb(4), one Tb(6), and one Cu(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Tb7(CuTe4)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.537
_cell_length_b   7.540
_cell_length_c   14.268
_cell_angle_alpha   94.986
_cell_angle_beta   95.008
_cell_angle_gamma   119.980
_symmetry_Int_Tables_number   1
_cell_volume   691.606
_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
  Tb  Tb0  1  0.577  0.582  0.743  1.0
  Tb  Tb1  1  0.332  0.664  0.997  1.0
  Tb  Tb2  1  0.089  0.757  0.254  1.0
  Tb  Tb3  1  0.247  0.909  0.744  1.0
  Tb  Tb4  1  0.750  0.079  0.254  1.0
  Tb  Tb5  1  0.918  0.253  0.744  1.0
  Tb  Tb6  1  0.417  0.418  0.254  1.0
  Cu  Cu7  1  0.863  0.528  0.581  1.0
  Cu  Cu8  1  0.473  0.140  0.427  1.0
  Cu  Cu9  1  0.808  0.811  0.427  1.0
  Te  Te10  1  0.291  0.291  0.873  1.0
  Te  Te11  1  0.799  0.461  0.384  1.0
  Te  Te12  1  0.956  0.624  0.874  1.0
  Te  Te13  1  0.707  0.707  0.127  1.0
  Te  Te14  1  0.458  0.792  0.385  1.0
  Te  Te15  1  0.873  0.876  0.617  1.0
  Te  Te16  1  0.624  0.957  0.873  1.0
  Te  Te17  1  0.379  0.043  0.127  1.0
  Te  Te18  1  0.127  0.131  0.384  1.0
  Te  Te19  1  0.536  0.204  0.617  1.0
  Te  Te20  1  0.044  0.379  0.128  1.0
  Te  Te21  1  0.208  0.539  0.617  1.0
[/CIF]
.