The compound described by Ge1Cu2Te3 is Enargite-like structured and crystallizes in the triclinic P1 space group. There are eight inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one Te(10), one Te(3), one Te(4), and one Te(9) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(4)Te4 tetrahedra,  a cornercorner with one Cu(6)Te4 tetrahedra,  a cornercorner with one Cu(8)Te4 tetrahedra,  a cornercorner with one Ge(1)Te4 tetrahedra,  a cornercorner with one Ge(2)Te4 tetrahedra,  a cornercorner with one Ge(3)Te4 tetrahedra, corners with two equivalent Cu(5)Te4 tetrahedra, corners with two equivalent Cu(7)Te4 tetrahedra, and corners with two equivalent Ge(4)Te4 tetrahedra. In the second Cu site, Cu(2) is bonded to one Te(1), one Te(11), one Te(5), and one Te(7) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(4)Te4 tetrahedra,  a cornercorner with one Cu(5)Te4 tetrahedra,  a cornercorner with one Cu(7)Te4 tetrahedra,  a cornercorner with one Ge(1)Te4 tetrahedra,  a cornercorner with one Ge(3)Te4 tetrahedra,  a cornercorner with one Ge(4)Te4 tetrahedra, corners with two equivalent Cu(6)Te4 tetrahedra, corners with two equivalent Cu(8)Te4 tetrahedra, and corners with two equivalent Ge(2)Te4 tetrahedra. In the third Cu site, Cu(3) is bonded to one Te(12), one Te(2), one Te(6), and one Te(8) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(5)Te4 tetrahedra,  a cornercorner with one Cu(6)Te4 tetrahedra,  a cornercorner with one Cu(7)Te4 tetrahedra,  a cornercorner with one Cu(8)Te4 tetrahedra,  a cornercorner with one Ge(2)Te4 tetrahedra,  a cornercorner with one Ge(4)Te4 tetrahedra, corners with two equivalent Cu(4)Te4 tetrahedra, corners with two equivalent Ge(1)Te4 tetrahedra, and corners with two equivalent Ge(3)Te4 tetrahedra. In the fourth Cu site, Cu(4) is bonded to one Te(1), one Te(12), one Te(6), and one Te(9) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(7)Te4 tetrahedra,  a cornercorner with one Cu(8)Te4 tetrahedra,  a cornercorner with one Ge(2)Te4 tetrahedra,  a cornercorner with one Ge(4)Te4 tetrahedra, corners with two equivalent Cu(3)Te4 tetrahedra, corners with two equivalent Ge(1)Te4 tetrahedra, and corners with two equivalent Ge(3)Te4 tetrahedra. In the fifth Cu site, Cu(5) is bonded to one Te(10), one Te(2), one Te(4), and one Te(7) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one Cu(8)Te4 tetrahedra,  a cornercorner with one Ge(1)Te4 tetrahedra,  a cornercorner with one Ge(2)Te4 tetrahedra,  a cornercorner with one Ge(3)Te4 tetrahedra, corners with two equivalent Cu(1)Te4 tetrahedra, corners with two equivalent Cu(7)Te4 tetrahedra, and corners with two equivalent Ge(4)Te4 tetrahedra. In the sixth Cu site, Cu(6) is bonded to one Te(11), one Te(3), one Te(5), and one Te(8) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one Cu(7)Te4 tetrahedra,  a cornercorner with one Ge(1)Te4 tetrahedra,  a cornercorner with one Ge(3)Te4 tetrahedra,  a cornercorner with one Ge(4)Te4 tetrahedra, corners with two equivalent Cu(2)Te4 tetrahedra, corners with two equivalent Cu(8)Te4 tetrahedra, and corners with two equivalent Ge(2)Te4 tetrahedra. In the seventh Cu site, Cu(7) is bonded to one Te(12), one Te(3), one Te(4), and one Te(7) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one Cu(4)Te4 tetrahedra,  a cornercorner with one Cu(6)Te4 tetrahedra,  a cornercorner with one Ge(2)Te4 tetrahedra,  a cornercorner with one Ge(3)Te4 tetrahedra, corners with two equivalent Cu(1)Te4 tetrahedra, corners with two equivalent Cu(5)Te4 tetrahedra, and corners with two equivalent Ge(4)Te4 tetrahedra. In the eighth Cu site, Cu(8) is bonded to one Te(1), one Te(10), one Te(5), and one Te(8) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one Cu(4)Te4 tetrahedra,  a cornercorner with one Cu(5)Te4 tetrahedra,  a cornercorner with one Ge(3)Te4 tetrahedra,  a cornercorner with one Ge(4)Te4 tetrahedra, corners with two equivalent Cu(2)Te4 tetrahedra, corners with two equivalent Cu(6)Te4 tetrahedra, and corners with two equivalent Ge(2)Te4 tetrahedra. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one Te(11), one Te(2), one Te(6), and one Te(9) atom to form GeTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(5)Te4 tetrahedra,  a cornercorner with one Cu(6)Te4 tetrahedra,  a cornercorner with one Ge(2)Te4 tetrahedra,  a cornercorner with one Ge(4)Te4 tetrahedra, corners with two equivalent Cu(3)Te4 tetrahedra, corners with two equivalent Cu(4)Te4 tetrahedra, and corners with two equivalent Ge(3)Te4 tetrahedra. In the second Ge site, Ge(2) is bonded to one Te(1), one Te(11), one Te(4), and one Te(8) atom to form GeTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one Cu(4)Te4 tetrahedra,  a cornercorner with one Cu(5)Te4 tetrahedra,  a cornercorner with one Cu(7)Te4 tetrahedra,  a cornercorner with one Ge(1)Te4 tetrahedra, corners with two equivalent Cu(2)Te4 tetrahedra, corners with two equivalent Cu(6)Te4 tetrahedra, and corners with two equivalent Cu(8)Te4 tetrahedra. In the third Ge site, Ge(3) is bonded to one Te(12), one Te(2), one Te(5), and one Te(9) atom to form GeTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(5)Te4 tetrahedra,  a cornercorner with one Cu(6)Te4 tetrahedra,  a cornercorner with one Cu(7)Te4 tetrahedra,  a cornercorner with one Cu(8)Te4 tetrahedra, corners with two equivalent Cu(3)Te4 tetrahedra, corners with two equivalent Cu(4)Te4 tetrahedra, and corners with two equivalent Ge(1)Te4 tetrahedra. In the fourth Ge site, Ge(4) is bonded to one Te(10), one Te(3), one Te(6), and one Te(7) atom to form GeTe4 tetrahedra that share  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one Cu(4)Te4 tetrahedra,  a cornercorner with one Cu(6)Te4 tetrahedra,  a cornercorner with one Cu(8)Te4 tetrahedra,  a cornercorner with one Ge(1)Te4 tetrahedra, corners with two equivalent Cu(1)Te4 tetrahedra, corners with two equivalent Cu(5)Te4 tetrahedra, and corners with two equivalent Cu(7)Te4 tetrahedra. There are twelve inequivalent Te sites. In the first Te site, Te(1) is bonded to one Cu(2), one Cu(4), one Cu(8), and one Ge(2) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(6)Cu2Ge2 tetrahedra,  a cornercorner with one Te(9)Cu2Ge2 tetrahedra,  a cornercorner with one Te(10)Cu3Ge tetrahedra,  a cornercorner with one Te(12)Cu3Ge tetrahedra,  a cornercorner with one Te(4)Cu3Ge tetrahedra,  a cornercorner with one Te(7)Cu3Ge tetrahedra, corners with two equivalent Te(11)Cu2Ge2 tetrahedra, corners with two equivalent Te(5)Cu3Ge tetrahedra, and corners with two equivalent Te(8)Cu3Ge tetrahedra. In the second Te site, Te(2) is bonded to one Cu(3), one Cu(5), one Ge(1), and one Ge(3) atom to form TeCu2Ge2 tetrahedra that share  a cornercorner with one Te(11)Cu2Ge2 tetrahedra,  a cornercorner with one Te(10)Cu3Ge tetrahedra,  a cornercorner with one Te(4)Cu3Ge tetrahedra,  a cornercorner with one Te(5)Cu3Ge tetrahedra,  a cornercorner with one Te(7)Cu3Ge tetrahedra,  a cornercorner with one Te(8)Cu3Ge tetrahedra, corners with two equivalent Te(6)Cu2Ge2 tetrahedra, corners with two equivalent Te(9)Cu2Ge2 tetrahedra, and corners with two equivalent Te(12)Cu3Ge tetrahedra. In the third Te site, Te(3) is bonded to one Cu(1), one Cu(6), one Cu(7), and one Ge(4) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(11)Cu2Ge2 tetrahedra,  a cornercorner with one Te(6)Cu2Ge2 tetrahedra,  a cornercorner with one Te(9)Cu2Ge2 tetrahedra,  a cornercorner with one Te(12)Cu3Ge tetrahedra,  a cornercorner with one Te(5)Cu3Ge tetrahedra,  a cornercorner with one Te(8)Cu3Ge tetrahedra, corners with two equivalent Te(10)Cu3Ge tetrahedra, corners with two equivalent Te(4)Cu3Ge tetrahedra, and corners with two equivalent Te(7)Cu3Ge tetrahedra. In the fourth Te site, Te(4) is bonded to one Cu(1), one Cu(5), one Cu(7), and one Ge(2) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(11)Cu2Ge2 tetrahedra,  a cornercorner with one Te(2)Cu2Ge2 tetrahedra,  a cornercorner with one Te(9)Cu2Ge2 tetrahedra,  a cornercorner with one Te(1)Cu3Ge tetrahedra,  a cornercorner with one Te(12)Cu3Ge tetrahedra,  a cornercorner with one Te(8)Cu3Ge tetrahedra, corners with two equivalent Te(10)Cu3Ge tetrahedra, corners with two equivalent Te(3)Cu3Ge tetrahedra, and corners with two equivalent Te(7)Cu3Ge tetrahedra. In the fifth Te site, Te(5) is bonded to one Cu(2), one Cu(6), one Cu(8), and one Ge(3) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(2)Cu2Ge2 tetrahedra,  a cornercorner with one Te(9)Cu2Ge2 tetrahedra,  a cornercorner with one Te(10)Cu3Ge tetrahedra,  a cornercorner with one Te(12)Cu3Ge tetrahedra,  a cornercorner with one Te(3)Cu3Ge tetrahedra,  a cornercorner with one Te(7)Cu3Ge tetrahedra, corners with two equivalent Te(11)Cu2Ge2 tetrahedra, corners with two equivalent Te(1)Cu3Ge tetrahedra, and corners with two equivalent Te(8)Cu3Ge tetrahedra. In the sixth Te site, Te(6) is bonded to one Cu(3), one Cu(4), one Ge(1), and one Ge(4) atom to form TeCu2Ge2 tetrahedra that share  a cornercorner with one Te(11)Cu2Ge2 tetrahedra,  a cornercorner with one Te(1)Cu3Ge tetrahedra,  a cornercorner with one Te(10)Cu3Ge tetrahedra,  a cornercorner with one Te(3)Cu3Ge tetrahedra,  a cornercorner with one Te(7)Cu3Ge tetrahedra,  a cornercorner with one Te(8)Cu3Ge tetrahedra, corners with two equivalent Te(2)Cu2Ge2 tetrahedra, corners with two equivalent Te(9)Cu2Ge2 tetrahedra, and corners with two equivalent Te(12)Cu3Ge tetrahedra. In the seventh Te site, Te(7) is bonded to one Cu(2), one Cu(5), one Cu(7), and one Ge(4) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(11)Cu2Ge2 tetrahedra,  a cornercorner with one Te(2)Cu2Ge2 tetrahedra,  a cornercorner with one Te(6)Cu2Ge2 tetrahedra,  a cornercorner with one Te(1)Cu3Ge tetrahedra,  a cornercorner with one Te(12)Cu3Ge tetrahedra,  a cornercorner with one Te(5)Cu3Ge tetrahedra, corners with two equivalent Te(10)Cu3Ge tetrahedra, corners with two equivalent Te(3)Cu3Ge tetrahedra, and corners with two equivalent Te(4)Cu3Ge tetrahedra. In the eighth Te site, Te(8) is bonded to one Cu(3), one Cu(6), one Cu(8), and one Ge(2) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(2)Cu2Ge2 tetrahedra,  a cornercorner with one Te(6)Cu2Ge2 tetrahedra,  a cornercorner with one Te(10)Cu3Ge tetrahedra,  a cornercorner with one Te(12)Cu3Ge tetrahedra,  a cornercorner with one Te(3)Cu3Ge tetrahedra,  a cornercorner with one Te(4)Cu3Ge tetrahedra, corners with two equivalent Te(11)Cu2Ge2 tetrahedra, corners with two equivalent Te(1)Cu3Ge tetrahedra, and corners with two equivalent Te(5)Cu3Ge tetrahedra. In the ninth Te site, Te(9) is bonded to one Cu(1), one Cu(4), one Ge(1), and one Ge(3) atom to form TeCu2Ge2 tetrahedra that share  a cornercorner with one Te(11)Cu2Ge2 tetrahedra,  a cornercorner with one Te(1)Cu3Ge tetrahedra,  a cornercorner with one Te(10)Cu3Ge tetrahedra,  a cornercorner with one Te(3)Cu3Ge tetrahedra,  a cornercorner with one Te(4)Cu3Ge tetrahedra,  a cornercorner with one Te(5)Cu3Ge tetrahedra, corners with two equivalent Te(2)Cu2Ge2 tetrahedra, corners with two equivalent Te(6)Cu2Ge2 tetrahedra, and corners with two equivalent Te(12)Cu3Ge tetrahedra. In the tenth Te site, Te(10) is bonded to one Cu(1), one Cu(5), one Cu(8), and one Ge(4) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(2)Cu2Ge2 tetrahedra,  a cornercorner with one Te(6)Cu2Ge2 tetrahedra,  a cornercorner with one Te(9)Cu2Ge2 tetrahedra,  a cornercorner with one Te(1)Cu3Ge tetrahedra,  a cornercorner with one Te(5)Cu3Ge tetrahedra,  a cornercorner with one Te(8)Cu3Ge tetrahedra, corners with two equivalent Te(3)Cu3Ge tetrahedra, corners with two equivalent Te(4)Cu3Ge tetrahedra, and corners with two equivalent Te(7)Cu3Ge tetrahedra. In the eleventh Te site, Te(11) is bonded to one Cu(2), one Cu(6), one Ge(1), and one Ge(2) atom to form TeCu2Ge2 tetrahedra that share  a cornercorner with one Te(2)Cu2Ge2 tetrahedra,  a cornercorner with one Te(6)Cu2Ge2 tetrahedra,  a cornercorner with one Te(9)Cu2Ge2 tetrahedra,  a cornercorner with one Te(3)Cu3Ge tetrahedra,  a cornercorner with one Te(4)Cu3Ge tetrahedra,  a cornercorner with one Te(7)Cu3Ge tetrahedra, corners with two equivalent Te(1)Cu3Ge tetrahedra, corners with two equivalent Te(5)Cu3Ge tetrahedra, and corners with two equivalent Te(8)Cu3Ge tetrahedra. In the twelfth Te site, Te(12) is bonded to one Cu(3), one Cu(4), one Cu(7), and one Ge(3) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(1)Cu3Ge tetrahedra,  a cornercorner with one Te(3)Cu3Ge tetrahedra,  a cornercorner with one Te(4)Cu3Ge tetrahedra,  a cornercorner with one Te(5)Cu3Ge tetrahedra,  a cornercorner with one Te(7)Cu3Ge tetrahedra,  a cornercorner with one Te(8)Cu3Ge tetrahedra, corners with two equivalent Te(2)Cu2Ge2 tetrahedra, corners with two equivalent Te(6)Cu2Ge2 tetrahedra, and corners with two equivalent Te(9)Cu2Ge2 tetrahedra. is represented by the CIF card [CIF]
data_Cu2GeTe3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.395
_cell_length_b   8.637
_cell_length_c   11.329
_cell_angle_alpha   112.382
_cell_angle_beta   90.211
_cell_angle_gamma   90.108
_symmetry_Int_Tables_number   1
_cell_volume   669.106
_cell_formula_units_Z   4
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
  Cu  Cu0  1  0.497  0.747  0.995  1.0
  Cu  Cu1  1  0.827  0.083  0.667  1.0
  Cu  Cu2  1  0.174  0.419  0.337  1.0
  Cu  Cu3  1  0.662  0.667  0.338  1.0
  Cu  Cu4  1  0.002  0.997  0.996  1.0
  Cu  Cu5  1  0.336  0.338  0.666  1.0
  Cu  Cu6  1  0.499  0.249  0.998  1.0
  Cu  Cu7  1  0.832  0.584  0.667  1.0
  Ge  Ge8  1  0.166  0.917  0.335  1.0
  Ge  Ge9  1  0.339  0.826  0.668  1.0
  Ge  Ge10  1  0.660  0.176  0.341  1.0
  Ge  Ge11  1  0.000  0.498  0.992  1.0
  Te  Te12  1  0.680  0.791  0.584  1.0
  Te  Te13  1  0.006  0.135  0.242  1.0
  Te  Te14  1  0.347  0.455  0.914  1.0
  Te  Te15  1  0.336  0.963  0.923  1.0
  Te  Te16  1  0.670  0.299  0.596  1.0
  Te  Te17  1  0.992  0.613  0.256  1.0
  Te  Te18  1  0.827  0.200  0.914  1.0
  Te  Te19  1  0.158  0.535  0.582  1.0
  Te  Te20  1  0.509  0.860  0.240  1.0
  Te  Te21  1  0.825  0.713  0.913  1.0
  Te  Te22  1  0.159  0.056  0.594  1.0
  Te  Te23  1  0.496  0.378  0.244  1.0
[/CIF]
.
The compound described by Ge1Cu2Te3 is Enargite-like structured and crystallizes in the triclinic P1 space group. There are eight inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one Te(10), one Te(3), one Te(4), and one Te(9) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(4)Te4 tetrahedra,  a cornercorner with one Cu(6)Te4 tetrahedra,  a cornercorner with one Cu(8)Te4 tetrahedra,  a cornercorner with one Ge(1)Te4 tetrahedra,  a cornercorner with one Ge(2)Te4 tetrahedra,  a cornercorner with one Ge(3)Te4 tetrahedra, corners with two equivalent Cu(5)Te4 tetrahedra, corners with two equivalent Cu(7)Te4 tetrahedra, and corners with two equivalent Ge(4)Te4 tetrahedra. In the second Cu site, Cu(2) is bonded to one Te(1), one Te(11), one Te(5), and one Te(7) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(4)Te4 tetrahedra,  a cornercorner with one Cu(5)Te4 tetrahedra,  a cornercorner with one Cu(7)Te4 tetrahedra,  a cornercorner with one Ge(1)Te4 tetrahedra,  a cornercorner with one Ge(3)Te4 tetrahedra,  a cornercorner with one Ge(4)Te4 tetrahedra, corners with two equivalent Cu(6)Te4 tetrahedra, corners with two equivalent Cu(8)Te4 tetrahedra, and corners with two equivalent Ge(2)Te4 tetrahedra. In the third Cu site, Cu(3) is bonded to one Te(12), one Te(2), one Te(6), and one Te(8) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(5)Te4 tetrahedra,  a cornercorner with one Cu(6)Te4 tetrahedra,  a cornercorner with one Cu(7)Te4 tetrahedra,  a cornercorner with one Cu(8)Te4 tetrahedra,  a cornercorner with one Ge(2)Te4 tetrahedra,  a cornercorner with one Ge(4)Te4 tetrahedra, corners with two equivalent Cu(4)Te4 tetrahedra, corners with two equivalent Ge(1)Te4 tetrahedra, and corners with two equivalent Ge(3)Te4 tetrahedra. In the fourth Cu site, Cu(4) is bonded to one Te(1), one Te(12), one Te(6), and one Te(9) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(7)Te4 tetrahedra,  a cornercorner with one Cu(8)Te4 tetrahedra,  a cornercorner with one Ge(2)Te4 tetrahedra,  a cornercorner with one Ge(4)Te4 tetrahedra, corners with two equivalent Cu(3)Te4 tetrahedra, corners with two equivalent Ge(1)Te4 tetrahedra, and corners with two equivalent Ge(3)Te4 tetrahedra. In the fifth Cu site, Cu(5) is bonded to one Te(10), one Te(2), one Te(4), and one Te(7) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one Cu(8)Te4 tetrahedra,  a cornercorner with one Ge(1)Te4 tetrahedra,  a cornercorner with one Ge(2)Te4 tetrahedra,  a cornercorner with one Ge(3)Te4 tetrahedra, corners with two equivalent Cu(1)Te4 tetrahedra, corners with two equivalent Cu(7)Te4 tetrahedra, and corners with two equivalent Ge(4)Te4 tetrahedra. In the sixth Cu site, Cu(6) is bonded to one Te(11), one Te(3), one Te(5), and one Te(8) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one Cu(7)Te4 tetrahedra,  a cornercorner with one Ge(1)Te4 tetrahedra,  a cornercorner with one Ge(3)Te4 tetrahedra,  a cornercorner with one Ge(4)Te4 tetrahedra, corners with two equivalent Cu(2)Te4 tetrahedra, corners with two equivalent Cu(8)Te4 tetrahedra, and corners with two equivalent Ge(2)Te4 tetrahedra. In the seventh Cu site, Cu(7) is bonded to one Te(12), one Te(3), one Te(4), and one Te(7) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one Cu(4)Te4 tetrahedra,  a cornercorner with one Cu(6)Te4 tetrahedra,  a cornercorner with one Ge(2)Te4 tetrahedra,  a cornercorner with one Ge(3)Te4 tetrahedra, corners with two equivalent Cu(1)Te4 tetrahedra, corners with two equivalent Cu(5)Te4 tetrahedra, and corners with two equivalent Ge(4)Te4 tetrahedra. In the eighth Cu site, Cu(8) is bonded to one Te(1), one Te(10), one Te(5), and one Te(8) atom to form CuTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one Cu(4)Te4 tetrahedra,  a cornercorner with one Cu(5)Te4 tetrahedra,  a cornercorner with one Ge(3)Te4 tetrahedra,  a cornercorner with one Ge(4)Te4 tetrahedra, corners with two equivalent Cu(2)Te4 tetrahedra, corners with two equivalent Cu(6)Te4 tetrahedra, and corners with two equivalent Ge(2)Te4 tetrahedra. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one Te(11), one Te(2), one Te(6), and one Te(9) atom to form GeTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(5)Te4 tetrahedra,  a cornercorner with one Cu(6)Te4 tetrahedra,  a cornercorner with one Ge(2)Te4 tetrahedra,  a cornercorner with one Ge(4)Te4 tetrahedra, corners with two equivalent Cu(3)Te4 tetrahedra, corners with two equivalent Cu(4)Te4 tetrahedra, and corners with two equivalent Ge(3)Te4 tetrahedra. In the second Ge site, Ge(2) is bonded to one Te(1), one Te(11), one Te(4), and one Te(8) atom to form GeTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one Cu(4)Te4 tetrahedra,  a cornercorner with one Cu(5)Te4 tetrahedra,  a cornercorner with one Cu(7)Te4 tetrahedra,  a cornercorner with one Ge(1)Te4 tetrahedra, corners with two equivalent Cu(2)Te4 tetrahedra, corners with two equivalent Cu(6)Te4 tetrahedra, and corners with two equivalent Cu(8)Te4 tetrahedra. In the third Ge site, Ge(3) is bonded to one Te(12), one Te(2), one Te(5), and one Te(9) atom to form GeTe4 tetrahedra that share  a cornercorner with one Cu(1)Te4 tetrahedra,  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(5)Te4 tetrahedra,  a cornercorner with one Cu(6)Te4 tetrahedra,  a cornercorner with one Cu(7)Te4 tetrahedra,  a cornercorner with one Cu(8)Te4 tetrahedra, corners with two equivalent Cu(3)Te4 tetrahedra, corners with two equivalent Cu(4)Te4 tetrahedra, and corners with two equivalent Ge(1)Te4 tetrahedra. In the fourth Ge site, Ge(4) is bonded to one Te(10), one Te(3), one Te(6), and one Te(7) atom to form GeTe4 tetrahedra that share  a cornercorner with one Cu(2)Te4 tetrahedra,  a cornercorner with one Cu(3)Te4 tetrahedra,  a cornercorner with one Cu(4)Te4 tetrahedra,  a cornercorner with one Cu(6)Te4 tetrahedra,  a cornercorner with one Cu(8)Te4 tetrahedra,  a cornercorner with one Ge(1)Te4 tetrahedra, corners with two equivalent Cu(1)Te4 tetrahedra, corners with two equivalent Cu(5)Te4 tetrahedra, and corners with two equivalent Cu(7)Te4 tetrahedra. There are twelve inequivalent Te sites. In the first Te site, Te(1) is bonded to one Cu(2), one Cu(4), one Cu(8), and one Ge(2) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(6)Cu2Ge2 tetrahedra,  a cornercorner with one Te(9)Cu2Ge2 tetrahedra,  a cornercorner with one Te(10)Cu3Ge tetrahedra,  a cornercorner with one Te(12)Cu3Ge tetrahedra,  a cornercorner with one Te(4)Cu3Ge tetrahedra,  a cornercorner with one Te(7)Cu3Ge tetrahedra, corners with two equivalent Te(11)Cu2Ge2 tetrahedra, corners with two equivalent Te(5)Cu3Ge tetrahedra, and corners with two equivalent Te(8)Cu3Ge tetrahedra. In the second Te site, Te(2) is bonded to one Cu(3), one Cu(5), one Ge(1), and one Ge(3) atom to form TeCu2Ge2 tetrahedra that share  a cornercorner with one Te(11)Cu2Ge2 tetrahedra,  a cornercorner with one Te(10)Cu3Ge tetrahedra,  a cornercorner with one Te(4)Cu3Ge tetrahedra,  a cornercorner with one Te(5)Cu3Ge tetrahedra,  a cornercorner with one Te(7)Cu3Ge tetrahedra,  a cornercorner with one Te(8)Cu3Ge tetrahedra, corners with two equivalent Te(6)Cu2Ge2 tetrahedra, corners with two equivalent Te(9)Cu2Ge2 tetrahedra, and corners with two equivalent Te(12)Cu3Ge tetrahedra. In the third Te site, Te(3) is bonded to one Cu(1), one Cu(6), one Cu(7), and one Ge(4) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(11)Cu2Ge2 tetrahedra,  a cornercorner with one Te(6)Cu2Ge2 tetrahedra,  a cornercorner with one Te(9)Cu2Ge2 tetrahedra,  a cornercorner with one Te(12)Cu3Ge tetrahedra,  a cornercorner with one Te(5)Cu3Ge tetrahedra,  a cornercorner with one Te(8)Cu3Ge tetrahedra, corners with two equivalent Te(10)Cu3Ge tetrahedra, corners with two equivalent Te(4)Cu3Ge tetrahedra, and corners with two equivalent Te(7)Cu3Ge tetrahedra. In the fourth Te site, Te(4) is bonded to one Cu(1), one Cu(5), one Cu(7), and one Ge(2) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(11)Cu2Ge2 tetrahedra,  a cornercorner with one Te(2)Cu2Ge2 tetrahedra,  a cornercorner with one Te(9)Cu2Ge2 tetrahedra,  a cornercorner with one Te(1)Cu3Ge tetrahedra,  a cornercorner with one Te(12)Cu3Ge tetrahedra,  a cornercorner with one Te(8)Cu3Ge tetrahedra, corners with two equivalent Te(10)Cu3Ge tetrahedra, corners with two equivalent Te(3)Cu3Ge tetrahedra, and corners with two equivalent Te(7)Cu3Ge tetrahedra. In the fifth Te site, Te(5) is bonded to one Cu(2), one Cu(6), one Cu(8), and one Ge(3) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(2)Cu2Ge2 tetrahedra,  a cornercorner with one Te(9)Cu2Ge2 tetrahedra,  a cornercorner with one Te(10)Cu3Ge tetrahedra,  a cornercorner with one Te(12)Cu3Ge tetrahedra,  a cornercorner with one Te(3)Cu3Ge tetrahedra,  a cornercorner with one Te(7)Cu3Ge tetrahedra, corners with two equivalent Te(11)Cu2Ge2 tetrahedra, corners with two equivalent Te(1)Cu3Ge tetrahedra, and corners with two equivalent Te(8)Cu3Ge tetrahedra. In the sixth Te site, Te(6) is bonded to one Cu(3), one Cu(4), one Ge(1), and one Ge(4) atom to form TeCu2Ge2 tetrahedra that share  a cornercorner with one Te(11)Cu2Ge2 tetrahedra,  a cornercorner with one Te(1)Cu3Ge tetrahedra,  a cornercorner with one Te(10)Cu3Ge tetrahedra,  a cornercorner with one Te(3)Cu3Ge tetrahedra,  a cornercorner with one Te(7)Cu3Ge tetrahedra,  a cornercorner with one Te(8)Cu3Ge tetrahedra, corners with two equivalent Te(2)Cu2Ge2 tetrahedra, corners with two equivalent Te(9)Cu2Ge2 tetrahedra, and corners with two equivalent Te(12)Cu3Ge tetrahedra. In the seventh Te site, Te(7) is bonded to one Cu(2), one Cu(5), one Cu(7), and one Ge(4) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(11)Cu2Ge2 tetrahedra,  a cornercorner with one Te(2)Cu2Ge2 tetrahedra,  a cornercorner with one Te(6)Cu2Ge2 tetrahedra,  a cornercorner with one Te(1)Cu3Ge tetrahedra,  a cornercorner with one Te(12)Cu3Ge tetrahedra,  a cornercorner with one Te(5)Cu3Ge tetrahedra, corners with two equivalent Te(10)Cu3Ge tetrahedra, corners with two equivalent Te(3)Cu3Ge tetrahedra, and corners with two equivalent Te(4)Cu3Ge tetrahedra. In the eighth Te site, Te(8) is bonded to one Cu(3), one Cu(6), one Cu(8), and one Ge(2) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(2)Cu2Ge2 tetrahedra,  a cornercorner with one Te(6)Cu2Ge2 tetrahedra,  a cornercorner with one Te(10)Cu3Ge tetrahedra,  a cornercorner with one Te(12)Cu3Ge tetrahedra,  a cornercorner with one Te(3)Cu3Ge tetrahedra,  a cornercorner with one Te(4)Cu3Ge tetrahedra, corners with two equivalent Te(11)Cu2Ge2 tetrahedra, corners with two equivalent Te(1)Cu3Ge tetrahedra, and corners with two equivalent Te(5)Cu3Ge tetrahedra. In the ninth Te site, Te(9) is bonded to one Cu(1), one Cu(4), one Ge(1), and one Ge(3) atom to form TeCu2Ge2 tetrahedra that share  a cornercorner with one Te(11)Cu2Ge2 tetrahedra,  a cornercorner with one Te(1)Cu3Ge tetrahedra,  a cornercorner with one Te(10)Cu3Ge tetrahedra,  a cornercorner with one Te(3)Cu3Ge tetrahedra,  a cornercorner with one Te(4)Cu3Ge tetrahedra,  a cornercorner with one Te(5)Cu3Ge tetrahedra, corners with two equivalent Te(2)Cu2Ge2 tetrahedra, corners with two equivalent Te(6)Cu2Ge2 tetrahedra, and corners with two equivalent Te(12)Cu3Ge tetrahedra. In the tenth Te site, Te(10) is bonded to one Cu(1), one Cu(5), one Cu(8), and one Ge(4) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(2)Cu2Ge2 tetrahedra,  a cornercorner with one Te(6)Cu2Ge2 tetrahedra,  a cornercorner with one Te(9)Cu2Ge2 tetrahedra,  a cornercorner with one Te(1)Cu3Ge tetrahedra,  a cornercorner with one Te(5)Cu3Ge tetrahedra,  a cornercorner with one Te(8)Cu3Ge tetrahedra, corners with two equivalent Te(3)Cu3Ge tetrahedra, corners with two equivalent Te(4)Cu3Ge tetrahedra, and corners with two equivalent Te(7)Cu3Ge tetrahedra. In the eleventh Te site, Te(11) is bonded to one Cu(2), one Cu(6), one Ge(1), and one Ge(2) atom to form TeCu2Ge2 tetrahedra that share  a cornercorner with one Te(2)Cu2Ge2 tetrahedra,  a cornercorner with one Te(6)Cu2Ge2 tetrahedra,  a cornercorner with one Te(9)Cu2Ge2 tetrahedra,  a cornercorner with one Te(3)Cu3Ge tetrahedra,  a cornercorner with one Te(4)Cu3Ge tetrahedra,  a cornercorner with one Te(7)Cu3Ge tetrahedra, corners with two equivalent Te(1)Cu3Ge tetrahedra, corners with two equivalent Te(5)Cu3Ge tetrahedra, and corners with two equivalent Te(8)Cu3Ge tetrahedra. In the twelfth Te site, Te(12) is bonded to one Cu(3), one Cu(4), one Cu(7), and one Ge(3) atom to form TeCu3Ge tetrahedra that share  a cornercorner with one Te(1)Cu3Ge tetrahedra,  a cornercorner with one Te(3)Cu3Ge tetrahedra,  a cornercorner with one Te(4)Cu3Ge tetrahedra,  a cornercorner with one Te(5)Cu3Ge tetrahedra,  a cornercorner with one Te(7)Cu3Ge tetrahedra,  a cornercorner with one Te(8)Cu3Ge tetrahedra, corners with two equivalent Te(2)Cu2Ge2 tetrahedra, corners with two equivalent Te(6)Cu2Ge2 tetrahedra, and corners with two equivalent Te(9)Cu2Ge2 tetrahedra. is represented by the CIF card [CIF]
data_Cu2GeTe3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.395
_cell_length_b   8.637
_cell_length_c   11.329
_cell_angle_alpha   112.382
_cell_angle_beta   90.211
_cell_angle_gamma   90.108
_symmetry_Int_Tables_number   1
_cell_volume   669.106
_cell_formula_units_Z   4
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
  Cu  Cu0  1  0.497  0.747  0.995  1.0
  Cu  Cu1  1  0.827  0.083  0.667  1.0
  Cu  Cu2  1  0.174  0.419  0.337  1.0
  Cu  Cu3  1  0.662  0.667  0.338  1.0
  Cu  Cu4  1  0.002  0.997  0.996  1.0
  Cu  Cu5  1  0.336  0.338  0.666  1.0
  Cu  Cu6  1  0.499  0.249  0.998  1.0
  Cu  Cu7  1  0.832  0.584  0.667  1.0
  Ge  Ge8  1  0.166  0.917  0.335  1.0
  Ge  Ge9  1  0.339  0.826  0.668  1.0
  Ge  Ge10  1  0.660  0.176  0.341  1.0
  Ge  Ge11  1  0.000  0.498  0.992  1.0
  Te  Te12  1  0.680  0.791  0.584  1.0
  Te  Te13  1  0.006  0.135  0.242  1.0
  Te  Te14  1  0.347  0.455  0.914  1.0
  Te  Te15  1  0.336  0.963  0.923  1.0
  Te  Te16  1  0.670  0.299  0.596  1.0
  Te  Te17  1  0.992  0.613  0.256  1.0
  Te  Te18  1  0.827  0.200  0.914  1.0
  Te  Te19  1  0.158  0.535  0.582  1.0
  Te  Te20  1  0.509  0.860  0.240  1.0
  Te  Te21  1  0.825  0.713  0.913  1.0
  Te  Te22  1  0.159  0.056  0.594  1.0
  Te  Te23  1  0.496  0.378  0.244  1.0
[/CIF]
.