The crystal structure described by Li2Co2C2O7 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(6), and two equivalent O(7) atoms. In the second Li site, Li(2) is bonded in a 4-coordinate geometry to one O(5), one O(7), and two equivalent O(6) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 5-coordinate geometry to one O(3), two equivalent O(1), and two equivalent O(4) atoms. In the second Co site, Co(2) is bonded to one O(2), one O(3), one O(5), and two equivalent O(1) atoms to form distorted edge-sharing CoO5 square pyramids. There are two inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one O(3), one O(5), and one O(7) atom. In the second C site, C(2) is bonded in a trigonal planar geometry to one O(2), one O(4), and one O(6) atom. There are seven inequivalent O sites. In the first O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), two equivalent Li(2), and one C(2) atom. In the second O site, O(7) is bonded in a 4-coordinate geometry to one Li(2), two equivalent Li(1), and one C(1) atom. In the third O site, O(1) is bonded to two equivalent Co(1) and two equivalent Co(2) atoms to form a mixture of corner and edge-sharing OCo4 tetrahedra. In the fourth O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Li(1), one Co(2), and one C(2) atom. In the fifth O site, O(3) is bonded in a distorted single-bond geometry to one Co(1), one Co(2), and one C(1) atom. In the sixth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Co(1) and one C(2) atom. In the seventh O site, O(5) is bonded in a 3-coordinate geometry to one Li(2), one Co(2), and one C(1) atom. is represented by the CIF file [CIF]
data_Li2Co2C2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.247
_cell_length_b   8.915
_cell_length_c   10.609
_cell_angle_alpha   67.072
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   544.114
_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
  Li  Li0  1  0.906  0.935  0.125  1.0
  Li  Li1  1  0.594  0.435  0.125  1.0
  Li  Li2  1  0.204  0.709  0.027  1.0
  Li  Li3  1  0.704  0.791  0.973  1.0
  Li  Li4  1  0.296  0.209  0.027  1.0
  Li  Li5  1  0.796  0.291  0.973  1.0
  Li  Li6  1  0.406  0.565  0.875  1.0
  Li  Li7  1  0.094  0.065  0.875  1.0
  Co  Co8  1  0.397  0.833  0.488  1.0
  Co  Co9  1  0.103  0.333  0.488  1.0
  Co  Co10  1  0.452  0.551  0.354  1.0
  Co  Co11  1  0.048  0.051  0.354  1.0
  Co  Co12  1  0.952  0.949  0.646  1.0
  Co  Co13  1  0.548  0.449  0.646  1.0
  Co  Co14  1  0.897  0.667  0.512  1.0
  Co  Co15  1  0.603  0.167  0.512  1.0
  C  C16  1  0.293  0.869  0.173  1.0
  C  C17  1  0.871  0.591  0.255  1.0
  C  C18  1  0.207  0.369  0.173  1.0
  C  C19  1  0.629  0.091  0.255  1.0
  C  C20  1  0.371  0.909  0.745  1.0
  C  C21  1  0.793  0.631  0.827  1.0
  C  C22  1  0.129  0.409  0.745  1.0
  C  C23  1  0.707  0.131  0.827  1.0
  O  O24  1  0.574  0.656  0.475  1.0
  O  O25  1  0.780  0.988  0.265  1.0
  O  O26  1  0.251  0.889  0.284  1.0
  O  O27  1  0.982  0.576  0.364  1.0
  O  O28  1  0.926  0.156  0.475  1.0
  O  O29  1  0.720  0.488  0.265  1.0
  O  O30  1  0.398  0.743  0.173  1.0
  O  O31  1  0.249  0.389  0.284  1.0
  O  O32  1  0.518  0.076  0.364  1.0
  O  O33  1  0.913  0.708  0.138  1.0
  O  O34  1  0.222  0.975  0.056  1.0
  O  O35  1  0.102  0.243  0.173  1.0
  O  O36  1  0.587  0.208  0.138  1.0
  O  O37  1  0.278  0.475  0.056  1.0
  O  O38  1  0.722  0.525  0.944  1.0
  O  O39  1  0.413  0.792  0.862  1.0
  O  O40  1  0.898  0.757  0.827  1.0
  O  O41  1  0.778  0.025  0.944  1.0
  O  O42  1  0.087  0.292  0.862  1.0
  O  O43  1  0.482  0.924  0.636  1.0
  O  O44  1  0.751  0.611  0.716  1.0
  O  O45  1  0.602  0.257  0.827  1.0
  O  O46  1  0.280  0.512  0.735  1.0
  O  O47  1  0.074  0.844  0.525  1.0
  O  O48  1  0.018  0.424  0.636  1.0
  O  O49  1  0.749  0.111  0.716  1.0
  O  O50  1  0.220  0.012  0.735  1.0
  O  O51  1  0.426  0.344  0.525  1.0
[/CIF]
.
The crystal structure described by Li2Co2C2O7 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(6), and two equivalent O(7) atoms. In the second Li site, Li(2) is bonded in a 4-coordinate geometry to one O(5), one O(7), and two equivalent O(6) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 5-coordinate geometry to one O(3), two equivalent O(1), and two equivalent O(4) atoms. In the second Co site, Co(2) is bonded to one O(2), one O(3), one O(5), and two equivalent O(1) atoms to form distorted edge-sharing CoO5 square pyramids. There are two inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one O(3), one O(5), and one O(7) atom. In the second C site, C(2) is bonded in a trigonal planar geometry to one O(2), one O(4), and one O(6) atom. There are seven inequivalent O sites. In the first O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), two equivalent Li(2), and one C(2) atom. In the second O site, O(7) is bonded in a 4-coordinate geometry to one Li(2), two equivalent Li(1), and one C(1) atom. In the third O site, O(1) is bonded to two equivalent Co(1) and two equivalent Co(2) atoms to form a mixture of corner and edge-sharing OCo4 tetrahedra. In the fourth O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Li(1), one Co(2), and one C(2) atom. In the fifth O site, O(3) is bonded in a distorted single-bond geometry to one Co(1), one Co(2), and one C(1) atom. In the sixth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Co(1) and one C(2) atom. In the seventh O site, O(5) is bonded in a 3-coordinate geometry to one Li(2), one Co(2), and one C(1) atom. is represented by the CIF file [CIF]
data_Li2Co2C2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.247
_cell_length_b   8.915
_cell_length_c   10.609
_cell_angle_alpha   67.072
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   544.114
_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
  Li  Li0  1  0.906  0.935  0.125  1.0
  Li  Li1  1  0.594  0.435  0.125  1.0
  Li  Li2  1  0.204  0.709  0.027  1.0
  Li  Li3  1  0.704  0.791  0.973  1.0
  Li  Li4  1  0.296  0.209  0.027  1.0
  Li  Li5  1  0.796  0.291  0.973  1.0
  Li  Li6  1  0.406  0.565  0.875  1.0
  Li  Li7  1  0.094  0.065  0.875  1.0
  Co  Co8  1  0.397  0.833  0.488  1.0
  Co  Co9  1  0.103  0.333  0.488  1.0
  Co  Co10  1  0.452  0.551  0.354  1.0
  Co  Co11  1  0.048  0.051  0.354  1.0
  Co  Co12  1  0.952  0.949  0.646  1.0
  Co  Co13  1  0.548  0.449  0.646  1.0
  Co  Co14  1  0.897  0.667  0.512  1.0
  Co  Co15  1  0.603  0.167  0.512  1.0
  C  C16  1  0.293  0.869  0.173  1.0
  C  C17  1  0.871  0.591  0.255  1.0
  C  C18  1  0.207  0.369  0.173  1.0
  C  C19  1  0.629  0.091  0.255  1.0
  C  C20  1  0.371  0.909  0.745  1.0
  C  C21  1  0.793  0.631  0.827  1.0
  C  C22  1  0.129  0.409  0.745  1.0
  C  C23  1  0.707  0.131  0.827  1.0
  O  O24  1  0.574  0.656  0.475  1.0
  O  O25  1  0.780  0.988  0.265  1.0
  O  O26  1  0.251  0.889  0.284  1.0
  O  O27  1  0.982  0.576  0.364  1.0
  O  O28  1  0.926  0.156  0.475  1.0
  O  O29  1  0.720  0.488  0.265  1.0
  O  O30  1  0.398  0.743  0.173  1.0
  O  O31  1  0.249  0.389  0.284  1.0
  O  O32  1  0.518  0.076  0.364  1.0
  O  O33  1  0.913  0.708  0.138  1.0
  O  O34  1  0.222  0.975  0.056  1.0
  O  O35  1  0.102  0.243  0.173  1.0
  O  O36  1  0.587  0.208  0.138  1.0
  O  O37  1  0.278  0.475  0.056  1.0
  O  O38  1  0.722  0.525  0.944  1.0
  O  O39  1  0.413  0.792  0.862  1.0
  O  O40  1  0.898  0.757  0.827  1.0
  O  O41  1  0.778  0.025  0.944  1.0
  O  O42  1  0.087  0.292  0.862  1.0
  O  O43  1  0.482  0.924  0.636  1.0
  O  O44  1  0.751  0.611  0.716  1.0
  O  O45  1  0.602  0.257  0.827  1.0
  O  O46  1  0.280  0.512  0.735  1.0
  O  O47  1  0.074  0.844  0.525  1.0
  O  O48  1  0.018  0.424  0.636  1.0
  O  O49  1  0.749  0.111  0.716  1.0
  O  O50  1  0.220  0.012  0.735  1.0
  O  O51  1  0.426  0.344  0.525  1.0
[/CIF]
.