The structure described by Li4(CuO2)3 crystallizes in the monoclinic Cm space group. There are five inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(2), one O(3), one O(4), one O(6), and one O(7) atom to form distorted LiO5 trigonal bipyramids that share corners with two equivalent Li(4)O4 trigonal pyramids,  an edgeedge with one Li(5)O5 square pyramid, and  an edgeedge with one Li(1)O5 trigonal bipyramid. In the second Li site, Li(2) is bonded in a rectangular see-saw-like geometry to one O(2), one O(5), and two equivalent O(1) atoms. In the third Li site, Li(3) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(3), one O(5), and one O(7) atom. In the fourth Li site, Li(4) is bonded to one O(1), one O(3), one O(4), and one O(8) atom to form distorted LiO4 trigonal pyramids that share corners with two equivalent Li(1)O5 trigonal bipyramids,  a cornercorner with one Li(4)O4 trigonal pyramid, and  an edgeedge with one Li(5)O5 square pyramid. In the fifth Li site, Li(5) is bonded to one O(8), two equivalent O(4), and two equivalent O(7) atoms to form LiO5 square pyramids that share edges with two equivalent Li(1)O5 trigonal bipyramids and edges with two equivalent Li(4)O4 trigonal pyramids. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a square co-planar geometry to one O(1), one O(2), one O(4), and one O(8) atom. In the second Cu site, Cu(2) is bonded in a square co-planar geometry to one O(3), one O(5), one O(6), and one O(7) atom. In the third Cu site, Cu(3) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(4) atoms. In the fourth Cu site, Cu(4) is bonded in a rectangular see-saw-like geometry to two equivalent O(3) and two equivalent O(7) atoms. There are eight inequivalent O sites. In the first O site, O(5) is bonded to one Li(2), two equivalent Li(3), and two equivalent Cu(2) atoms to form a mixture of edge and corner-sharing OLi3Cu2 trigonal bipyramids. In the second O site, O(6) is bonded in a rectangular see-saw-like geometry to two equivalent Li(1) and two equivalent Cu(2) atoms. In the third O site, O(7) is bonded to one Li(1), one Li(3), one Li(5), one Cu(2), and one Cu(4) atom to form a mixture of edge and corner-sharing OLi3Cu2 trigonal bipyramids. In the fourth O site, O(8) is bonded to one Li(5), two equivalent Li(4), and two equivalent Cu(1) atoms to form a mixture of edge and corner-sharing OLi3Cu2 trigonal bipyramids. In the fifth O site, O(1) is bonded to one Li(2), one Li(3), one Li(4), one Cu(1), and one Cu(3) atom to form a mixture of edge and corner-sharing OLi3Cu2 square pyramids. In the sixth O site, O(2) is bonded to one Li(2), two equivalent Li(1), and two equivalent Cu(1) atoms to form a mixture of distorted edge and corner-sharing OLi3Cu2 square pyramids. In the seventh O site, O(3) is bonded to one Li(1), one Li(3), one Li(4), one Cu(2), and one Cu(4) atom to form a mixture of edge and corner-sharing OLi3Cu2 trigonal bipyramids. In the eighth O site, O(4) is bonded to one Li(1), one Li(4), one Li(5), one Cu(1), and one Cu(3) atom to form a mixture of edge and corner-sharing OLi3Cu2 trigonal bipyramids. is represented by the CIF card [CIF]
data_Li4(CuO2)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.446
_cell_length_b   6.446
_cell_length_c   7.195
_cell_angle_alpha   68.991
_cell_angle_beta   68.991
_cell_angle_gamma   78.781
_symmetry_Int_Tables_number   1
_cell_volume   259.769
_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  0.035  0.711  0.450  1.0
  Li  Li1  1  0.698  0.698  0.849  1.0
  Li  Li2  1  0.711  0.035  0.450  1.0
  Li  Li3  1  0.637  0.309  0.135  1.0
  Li  Li4  1  0.340  0.014  0.889  1.0
  Li  Li5  1  0.297  0.297  0.536  1.0
  Li  Li6  1  0.309  0.637  0.135  1.0
  Li  Li7  1  0.014  0.340  0.889  1.0
  Cu  Cu8  1  0.822  0.156  0.729  1.0
  Cu  Cu9  1  0.848  0.521  0.266  1.0
  Cu  Cu10  1  0.477  0.477  0.748  1.0
  Cu  Cu11  1  0.521  0.848  0.266  1.0
  Cu  Cu12  1  0.156  0.822  0.729  1.0
  Cu  Cu13  1  0.175  0.175  0.269  1.0
  O  O14  1  0.725  0.396  0.837  1.0
  O  O15  1  0.902  0.902  0.642  1.0
  O  O16  1  0.912  0.270  0.189  1.0
  O  O17  1  0.550  0.219  0.674  1.0
  O  O18  1  0.609  0.609  0.162  1.0
  O  O19  1  0.219  0.550  0.674  1.0
  O  O20  1  0.765  0.765  0.356  1.0
  O  O21  1  0.396  0.725  0.837  1.0
  O  O22  1  0.445  0.099  0.346  1.0
  O  O23  1  0.095  0.095  0.781  1.0
  O  O24  1  0.099  0.445  0.346  1.0
  O  O25  1  0.270  0.912  0.189  1.0
[/CIF]
.
The structure described by Li4(CuO2)3 crystallizes in the monoclinic Cm space group. There are five inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(2), one O(3), one O(4), one O(6), and one O(7) atom to form distorted LiO5 trigonal bipyramids that share corners with two equivalent Li(4)O4 trigonal pyramids,  an edgeedge with one Li(5)O5 square pyramid, and  an edgeedge with one Li(1)O5 trigonal bipyramid. In the second Li site, Li(2) is bonded in a rectangular see-saw-like geometry to one O(2), one O(5), and two equivalent O(1) atoms. In the third Li site, Li(3) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(3), one O(5), and one O(7) atom. In the fourth Li site, Li(4) is bonded to one O(1), one O(3), one O(4), and one O(8) atom to form distorted LiO4 trigonal pyramids that share corners with two equivalent Li(1)O5 trigonal bipyramids,  a cornercorner with one Li(4)O4 trigonal pyramid, and  an edgeedge with one Li(5)O5 square pyramid. In the fifth Li site, Li(5) is bonded to one O(8), two equivalent O(4), and two equivalent O(7) atoms to form LiO5 square pyramids that share edges with two equivalent Li(1)O5 trigonal bipyramids and edges with two equivalent Li(4)O4 trigonal pyramids. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a square co-planar geometry to one O(1), one O(2), one O(4), and one O(8) atom. In the second Cu site, Cu(2) is bonded in a square co-planar geometry to one O(3), one O(5), one O(6), and one O(7) atom. In the third Cu site, Cu(3) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(4) atoms. In the fourth Cu site, Cu(4) is bonded in a rectangular see-saw-like geometry to two equivalent O(3) and two equivalent O(7) atoms. There are eight inequivalent O sites. In the first O site, O(5) is bonded to one Li(2), two equivalent Li(3), and two equivalent Cu(2) atoms to form a mixture of edge and corner-sharing OLi3Cu2 trigonal bipyramids. In the second O site, O(6) is bonded in a rectangular see-saw-like geometry to two equivalent Li(1) and two equivalent Cu(2) atoms. In the third O site, O(7) is bonded to one Li(1), one Li(3), one Li(5), one Cu(2), and one Cu(4) atom to form a mixture of edge and corner-sharing OLi3Cu2 trigonal bipyramids. In the fourth O site, O(8) is bonded to one Li(5), two equivalent Li(4), and two equivalent Cu(1) atoms to form a mixture of edge and corner-sharing OLi3Cu2 trigonal bipyramids. In the fifth O site, O(1) is bonded to one Li(2), one Li(3), one Li(4), one Cu(1), and one Cu(3) atom to form a mixture of edge and corner-sharing OLi3Cu2 square pyramids. In the sixth O site, O(2) is bonded to one Li(2), two equivalent Li(1), and two equivalent Cu(1) atoms to form a mixture of distorted edge and corner-sharing OLi3Cu2 square pyramids. In the seventh O site, O(3) is bonded to one Li(1), one Li(3), one Li(4), one Cu(2), and one Cu(4) atom to form a mixture of edge and corner-sharing OLi3Cu2 trigonal bipyramids. In the eighth O site, O(4) is bonded to one Li(1), one Li(4), one Li(5), one Cu(1), and one Cu(3) atom to form a mixture of edge and corner-sharing OLi3Cu2 trigonal bipyramids. is represented by the CIF card [CIF]
data_Li4(CuO2)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.446
_cell_length_b   6.446
_cell_length_c   7.195
_cell_angle_alpha   68.991
_cell_angle_beta   68.991
_cell_angle_gamma   78.781
_symmetry_Int_Tables_number   1
_cell_volume   259.769
_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  0.035  0.711  0.450  1.0
  Li  Li1  1  0.698  0.698  0.849  1.0
  Li  Li2  1  0.711  0.035  0.450  1.0
  Li  Li3  1  0.637  0.309  0.135  1.0
  Li  Li4  1  0.340  0.014  0.889  1.0
  Li  Li5  1  0.297  0.297  0.536  1.0
  Li  Li6  1  0.309  0.637  0.135  1.0
  Li  Li7  1  0.014  0.340  0.889  1.0
  Cu  Cu8  1  0.822  0.156  0.729  1.0
  Cu  Cu9  1  0.848  0.521  0.266  1.0
  Cu  Cu10  1  0.477  0.477  0.748  1.0
  Cu  Cu11  1  0.521  0.848  0.266  1.0
  Cu  Cu12  1  0.156  0.822  0.729  1.0
  Cu  Cu13  1  0.175  0.175  0.269  1.0
  O  O14  1  0.725  0.396  0.837  1.0
  O  O15  1  0.902  0.902  0.642  1.0
  O  O16  1  0.912  0.270  0.189  1.0
  O  O17  1  0.550  0.219  0.674  1.0
  O  O18  1  0.609  0.609  0.162  1.0
  O  O19  1  0.219  0.550  0.674  1.0
  O  O20  1  0.765  0.765  0.356  1.0
  O  O21  1  0.396  0.725  0.837  1.0
  O  O22  1  0.445  0.099  0.346  1.0
  O  O23  1  0.095  0.095  0.781  1.0
  O  O24  1  0.099  0.445  0.346  1.0
  O  O25  1  0.270  0.912  0.189  1.0
[/CIF]
.