The structure described by Cu2S crystallizes in the tetragonal I4_1/amd space group. Cu(1) is bonded in a linear geometry to two equivalent S(1) atoms. S(1) is bonded to four equivalent Cu(1) atoms to form distorted corner-sharing SCu4 tetrahedra. is represented by the CIF card [CIF]
data_Cu2S
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.307
_cell_length_b   5.307
_cell_length_c   5.307
_cell_angle_alpha   97.386
_cell_angle_beta   97.386
_cell_angle_gamma   137.977
_symmetry_Int_Tables_number   1
_cell_volume   93.406
_cell_formula_units_Z   2
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  0.125  0.874  0.249  1.0
  Cu  Cu1  1  0.126  0.375  0.251  1.0
  Cu  Cu2  1  0.625  0.876  0.751  1.0
  Cu  Cu3  1  0.124  0.875  0.749  1.0
  S  S4  1  0.500  0.500  0.000  1.0
  S  S5  1  0.750  0.250  0.500  1.0
[/CIF]
.
The structure described by Cu2S crystallizes in the tetragonal I4_1/amd space group. Cu(1) is bonded in a linear geometry to two equivalent S(1) atoms. S(1) is bonded to four equivalent Cu(1) atoms to form distorted corner-sharing SCu4 tetrahedra. is represented by the CIF card [CIF]
data_Cu2S
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.307
_cell_length_b   5.307
_cell_length_c   5.307
_cell_angle_alpha   97.386
_cell_angle_beta   97.386
_cell_angle_gamma   137.977
_symmetry_Int_Tables_number   1
_cell_volume   93.406
_cell_formula_units_Z   2
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  0.125  0.874  0.249  1.0
  Cu  Cu1  1  0.126  0.375  0.251  1.0
  Cu  Cu2  1  0.625  0.876  0.751  1.0
  Cu  Cu3  1  0.124  0.875  0.749  1.0
  S  S4  1  0.500  0.500  0.000  1.0
  S  S5  1  0.750  0.250  0.500  1.0
[/CIF]
.