The material structure described by Li2S crystallizes in the hexagonal P6_3/mmc space group. Li(1) is bonded in a 4-coordinate geometry to four equivalent S(1) atoms. S(1) is bonded in a 8-coordinate geometry to eight equivalent Li(1) atoms. is represented by the CIF file [CIF]
data_Li2S
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.929
_cell_length_b   3.929
_cell_length_c   7.107
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   95.029
_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
  Li  Li0  1  0.333  0.667  0.592  1.0
  Li  Li1  1  0.333  0.667  0.908  1.0
  Li  Li2  1  0.667  0.333  0.408  1.0
  Li  Li3  1  0.667  0.333  0.092  1.0
  S  S4  1  0.667  0.333  0.750  1.0
  S  S5  1  0.333  0.667  0.250  1.0
[/CIF]
.
The material structure described by Li2S crystallizes in the hexagonal P6_3/mmc space group. Li(1) is bonded in a 4-coordinate geometry to four equivalent S(1) atoms. S(1) is bonded in a 8-coordinate geometry to eight equivalent Li(1) atoms. is represented by the CIF file [CIF]
data_Li2S
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.929
_cell_length_b   3.929
_cell_length_c   7.107
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   95.029
_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
  Li  Li0  1  0.333  0.667  0.592  1.0
  Li  Li1  1  0.333  0.667  0.908  1.0
  Li  Li2  1  0.667  0.333  0.408  1.0
  Li  Li3  1  0.667  0.333  0.092  1.0
  S  S4  1  0.667  0.333  0.750  1.0
  S  S5  1  0.333  0.667  0.250  1.0
[/CIF]
.