data_ZnCuTe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.47
_cell_length_b   4.47
_cell_length_c   4.47
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   ZnCuTe
_chemical_formula_sum   'Zn1 Cu1 Te1'
_cell_volume   63.33
_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
  Zn  Zn2  1  0.75  0.75  0.75  1.0
  Cu  Cu0  1  0.0  0.0  0.0  1.0
  Te  Te1  1  0.16  0.16  0.16  1.0

data_ZnCuTe
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.47
_cell_length_b   4.47
_cell_length_c   10.96
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   ZnCuTe
_chemical_formula_sum   'Zn3 Cu3 Te3'
_cell_volume   189.99
_cell_formula_units_Z   3
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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
  Zn  Zn0  3  0.0  0.0  0.25  1.0
  Cu  Cu1  3  0.0  0.0  0.0  1.0
  Te  Te2  3  0.0  0.0  0.84  1.0

Zn Cu Te
Zn Cu Te 0 2 o + + 0 2 + o + 0 2 + + o 0 1 o + + 0 1 + o + 0 1 + + o 0 1 + + + 1 2 o o o 
ZnCuTe is half-Heusler structured and crystallizes in the trigonal R3m space group. Cu(1) is bonded in a distorted single-bond geometry to four equivalent Zn(1) and one Te(1) atom. There are three shorter (2.72 Å) and one longer (2.79 Å) Cu(1)-Zn(1) bond length. The Cu(1)-Te(1) bond length is 1.79 Å. Zn(1) is bonded to four equivalent Cu(1) and three equivalent Te(1) atoms to form a mixture of distorted edge and corner-sharing ZnCu4Te3 hexagonal pyramids. All Zn(1)-Te(1) bond lengths are 2.75 Å. Te(1) is bonded in a distorted single-bond geometry to one Cu(1) and three equivalent Zn(1) atoms.