The structure described by BaCu(C2O7)2 crystallizes in the triclinic P-1 space group. Ba(1) is bonded in a 11-coordinate geometry to one O(1), one O(10), one O(12), one O(14), one O(2), one O(3), one O(4), one O(5), one O(7), and two equivalent O(9) atoms. Cu(1) is bonded in a square co-planar geometry to one O(11), one O(12), one O(7), and one O(8) atom. There are four inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(7) and one O(9) atom. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(10) and one O(8) atom. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one O(11) and one O(13) atom. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(12) and one O(14) atom. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Ba(1) and one O(6) atom. In the second O site, O(2) is bonded in an L-shaped geometry to one Ba(1) and one O(5) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Ba(1) and one O(3) atom. In the fourth O site, O(4) is bonded in a water-like geometry to one Ba(1) and one O(5) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Ba(1), one O(2), and one O(4) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one O(1) atom. In the seventh O site, O(7) is bonded in a distorted water-like geometry to one Ba(1), one Cu(1), and one C(1) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(2) atom. In the ninth O site, O(9) is bonded in a single-bond geometry to two equivalent Ba(1) and one C(1) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one Ba(1) and one C(2) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(3) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Cu(1), and one C(4) atom. In the thirteenth O site, O(13) is bonded in a single-bond geometry to one C(3) atom. In the fourteenth O site, O(14) is bonded in a single-bond geometry to one Ba(1) and one C(4) atom. is represented by the CIF file [CIF]
data_BaCu(C2O7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.440
_cell_length_b   9.162
_cell_length_c   10.755
_cell_angle_alpha   85.863
_cell_angle_beta   78.921
_cell_angle_gamma   77.570
_symmetry_Int_Tables_number   1
_cell_volume   607.896
_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
  Ba  Ba0  1  0.830  0.112  0.212  1.0
  Ba  Ba1  1  0.170  0.888  0.788  1.0
  Cu  Cu2  1  0.028  0.440  0.728  1.0
  Cu  Cu3  1  0.972  0.560  0.272  1.0
  C  C4  1  0.885  0.230  0.887  1.0
  C  C5  1  0.115  0.770  0.113  1.0
  C  C6  1  0.811  0.378  0.958  1.0
  C  C7  1  0.189  0.622  0.042  1.0
  C  C8  1  0.251  0.502  0.496  1.0
  C  C9  1  0.749  0.498  0.504  1.0
  C  C10  1  0.204  0.646  0.572  1.0
  C  C11  1  0.796  0.354  0.428  1.0
  O  O12  1  0.586  0.831  0.150  1.0
  O  O13  1  0.414  0.169  0.850  1.0
  O  O14  1  0.262  0.180  0.137  1.0
  O  O15  1  0.738  0.820  0.863  1.0
  O  O16  1  0.569  0.965  0.459  1.0
  O  O17  1  0.431  0.035  0.541  1.0
  O  O18  1  0.199  0.070  0.331  1.0
  O  O19  1  0.801  0.930  0.669  1.0
  O  O20  1  0.327  0.141  0.247  1.0
  O  O21  1  0.673  0.859  0.753  1.0
  O  O22  1  0.405  0.303  0.824  1.0
  O  O23  1  0.595  0.697  0.176  1.0
  O  O24  1  0.984  0.239  0.771  1.0
  O  O25  1  0.016  0.761  0.229  1.0
  O  O26  1  0.866  0.492  0.893  1.0
  O  O27  1  0.134  0.508  0.107  1.0
  O  O28  1  0.858  0.109  0.943  1.0
  O  O29  1  0.142  0.891  0.057  1.0
  O  O30  1  0.715  0.378  0.070  1.0
  O  O31  1  0.285  0.622  0.930  1.0
  O  O32  1  0.184  0.390  0.562  1.0
  O  O33  1  0.816  0.610  0.438  1.0
  O  O34  1  0.097  0.632  0.688  1.0
  O  O35  1  0.903  0.368  0.312  1.0
  O  O36  1  0.340  0.495  0.383  1.0
  O  O37  1  0.660  0.505  0.617  1.0
  O  O38  1  0.260  0.763  0.531  1.0
  O  O39  1  0.740  0.237  0.469  1.0
[/CIF]
.
The structure described by BaCu(C2O7)2 crystallizes in the triclinic P-1 space group. Ba(1) is bonded in a 11-coordinate geometry to one O(1), one O(10), one O(12), one O(14), one O(2), one O(3), one O(4), one O(5), one O(7), and two equivalent O(9) atoms. Cu(1) is bonded in a square co-planar geometry to one O(11), one O(12), one O(7), and one O(8) atom. There are four inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(7) and one O(9) atom. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(10) and one O(8) atom. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one O(11) and one O(13) atom. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(12) and one O(14) atom. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Ba(1) and one O(6) atom. In the second O site, O(2) is bonded in an L-shaped geometry to one Ba(1) and one O(5) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Ba(1) and one O(3) atom. In the fourth O site, O(4) is bonded in a water-like geometry to one Ba(1) and one O(5) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Ba(1), one O(2), and one O(4) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one O(1) atom. In the seventh O site, O(7) is bonded in a distorted water-like geometry to one Ba(1), one Cu(1), and one C(1) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(2) atom. In the ninth O site, O(9) is bonded in a single-bond geometry to two equivalent Ba(1) and one C(1) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one Ba(1) and one C(2) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(3) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Cu(1), and one C(4) atom. In the thirteenth O site, O(13) is bonded in a single-bond geometry to one C(3) atom. In the fourteenth O site, O(14) is bonded in a single-bond geometry to one Ba(1) and one C(4) atom. is represented by the CIF file [CIF]
data_BaCu(C2O7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.440
_cell_length_b   9.162
_cell_length_c   10.755
_cell_angle_alpha   85.863
_cell_angle_beta   78.921
_cell_angle_gamma   77.570
_symmetry_Int_Tables_number   1
_cell_volume   607.896
_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
  Ba  Ba0  1  0.830  0.112  0.212  1.0
  Ba  Ba1  1  0.170  0.888  0.788  1.0
  Cu  Cu2  1  0.028  0.440  0.728  1.0
  Cu  Cu3  1  0.972  0.560  0.272  1.0
  C  C4  1  0.885  0.230  0.887  1.0
  C  C5  1  0.115  0.770  0.113  1.0
  C  C6  1  0.811  0.378  0.958  1.0
  C  C7  1  0.189  0.622  0.042  1.0
  C  C8  1  0.251  0.502  0.496  1.0
  C  C9  1  0.749  0.498  0.504  1.0
  C  C10  1  0.204  0.646  0.572  1.0
  C  C11  1  0.796  0.354  0.428  1.0
  O  O12  1  0.586  0.831  0.150  1.0
  O  O13  1  0.414  0.169  0.850  1.0
  O  O14  1  0.262  0.180  0.137  1.0
  O  O15  1  0.738  0.820  0.863  1.0
  O  O16  1  0.569  0.965  0.459  1.0
  O  O17  1  0.431  0.035  0.541  1.0
  O  O18  1  0.199  0.070  0.331  1.0
  O  O19  1  0.801  0.930  0.669  1.0
  O  O20  1  0.327  0.141  0.247  1.0
  O  O21  1  0.673  0.859  0.753  1.0
  O  O22  1  0.405  0.303  0.824  1.0
  O  O23  1  0.595  0.697  0.176  1.0
  O  O24  1  0.984  0.239  0.771  1.0
  O  O25  1  0.016  0.761  0.229  1.0
  O  O26  1  0.866  0.492  0.893  1.0
  O  O27  1  0.134  0.508  0.107  1.0
  O  O28  1  0.858  0.109  0.943  1.0
  O  O29  1  0.142  0.891  0.057  1.0
  O  O30  1  0.715  0.378  0.070  1.0
  O  O31  1  0.285  0.622  0.930  1.0
  O  O32  1  0.184  0.390  0.562  1.0
  O  O33  1  0.816  0.610  0.438  1.0
  O  O34  1  0.097  0.632  0.688  1.0
  O  O35  1  0.903  0.368  0.312  1.0
  O  O36  1  0.340  0.495  0.383  1.0
  O  O37  1  0.660  0.505  0.617  1.0
  O  O38  1  0.260  0.763  0.531  1.0
  O  O39  1  0.740  0.237  0.469  1.0
[/CIF]
.