The compound described by Ca(CuO2)2 crystallizes in the orthorhombic Pbcm space group. Ca(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(3), and four equivalent O(1) atoms. Cu(1) is bonded in a rectangular see-saw-like geometry to one O(2), one O(3), and two equivalent O(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ca(1) and two equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing OCa2Cu2 tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Ca(1) and two equivalent Cu(1) atoms. In the third O site, O(3) is bonded to two equivalent Ca(1) and two equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing OCa2Cu2 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ca(CuO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.407
_cell_length_b   9.241
_cell_length_c   10.166
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   320.070
_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
  Ca  Ca0  1  0.403  0.250  0.345  1.0
  Ca  Ca1  1  0.403  0.750  0.155  1.0
  Ca  Ca2  1  0.597  0.250  0.845  1.0
  Ca  Ca3  1  0.597  0.750  0.655  1.0
  Cu  Cu4  1  0.868  0.069  0.112  1.0
  Cu  Cu5  1  0.868  0.569  0.388  1.0
  Cu  Cu6  1  0.132  0.569  0.888  1.0
  Cu  Cu7  1  0.868  0.931  0.388  1.0
  Cu  Cu8  1  0.132  0.931  0.888  1.0
  Cu  Cu9  1  0.868  0.431  0.112  1.0
  Cu  Cu10  1  0.132  0.431  0.612  1.0
  Cu  Cu11  1  0.132  0.069  0.612  1.0
  O  O12  1  0.115  0.388  0.958  1.0
  O  O13  1  0.885  0.612  0.042  1.0
  O  O14  1  0.569  0.500  0.250  1.0
  O  O15  1  0.885  0.388  0.458  1.0
  O  O16  1  0.885  0.112  0.458  1.0
  O  O17  1  0.897  0.750  0.314  1.0
  O  O18  1  0.115  0.612  0.542  1.0
  O  O19  1  0.103  0.750  0.814  1.0
  O  O20  1  0.569  0.000  0.250  1.0
  O  O21  1  0.431  0.500  0.750  1.0
  O  O22  1  0.115  0.112  0.958  1.0
  O  O23  1  0.103  0.250  0.686  1.0
  O  O24  1  0.897  0.250  0.186  1.0
  O  O25  1  0.431  0.000  0.750  1.0
  O  O26  1  0.115  0.888  0.542  1.0
  O  O27  1  0.885  0.888  0.042  1.0
[/CIF]
.
The compound described by Ca(CuO2)2 crystallizes in the orthorhombic Pbcm space group. Ca(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(3), and four equivalent O(1) atoms. Cu(1) is bonded in a rectangular see-saw-like geometry to one O(2), one O(3), and two equivalent O(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ca(1) and two equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing OCa2Cu2 tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Ca(1) and two equivalent Cu(1) atoms. In the third O site, O(3) is bonded to two equivalent Ca(1) and two equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing OCa2Cu2 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ca(CuO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.407
_cell_length_b   9.241
_cell_length_c   10.166
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   320.070
_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
  Ca  Ca0  1  0.403  0.250  0.345  1.0
  Ca  Ca1  1  0.403  0.750  0.155  1.0
  Ca  Ca2  1  0.597  0.250  0.845  1.0
  Ca  Ca3  1  0.597  0.750  0.655  1.0
  Cu  Cu4  1  0.868  0.069  0.112  1.0
  Cu  Cu5  1  0.868  0.569  0.388  1.0
  Cu  Cu6  1  0.132  0.569  0.888  1.0
  Cu  Cu7  1  0.868  0.931  0.388  1.0
  Cu  Cu8  1  0.132  0.931  0.888  1.0
  Cu  Cu9  1  0.868  0.431  0.112  1.0
  Cu  Cu10  1  0.132  0.431  0.612  1.0
  Cu  Cu11  1  0.132  0.069  0.612  1.0
  O  O12  1  0.115  0.388  0.958  1.0
  O  O13  1  0.885  0.612  0.042  1.0
  O  O14  1  0.569  0.500  0.250  1.0
  O  O15  1  0.885  0.388  0.458  1.0
  O  O16  1  0.885  0.112  0.458  1.0
  O  O17  1  0.897  0.750  0.314  1.0
  O  O18  1  0.115  0.612  0.542  1.0
  O  O19  1  0.103  0.750  0.814  1.0
  O  O20  1  0.569  0.000  0.250  1.0
  O  O21  1  0.431  0.500  0.750  1.0
  O  O22  1  0.115  0.112  0.958  1.0
  O  O23  1  0.103  0.250  0.686  1.0
  O  O24  1  0.897  0.250  0.186  1.0
  O  O25  1  0.431  0.000  0.750  1.0
  O  O26  1  0.115  0.888  0.542  1.0
  O  O27  1  0.885  0.888  0.042  1.0
[/CIF]
.