The crystal structure described by K2Mg(CuO2)2 crystallizes in the monoclinic Pm space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to one Mg(1), two equivalent Cu(2), and four equivalent O(1) atoms. In the second K site, K(2) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. Mg(1) is bonded in a rectangular see-saw-like geometry to one K(1), two equivalent O(1), and two equivalent O(2) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(2) atoms. In the second Cu site, Cu(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent K(1), two equivalent O(1), and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one K(2), two equivalent K(1), one Mg(1), one Cu(1), and one Cu(2) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one K(2), one Mg(1), one Cu(1), and one Cu(2) atom. is represented by the CIF file [CIF]
data_K2Mg(CuO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.164
_cell_length_b   5.687
_cell_length_c   6.781
_cell_angle_alpha   90.000
_cell_angle_beta   125.611
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   161.893
_cell_formula_units_Z   1
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
  K  K0  1  0.331  0.750  0.772  1.0
  K  K1  1  0.771  0.250  0.365  1.0
  Mg  Mg2  1  0.516  0.750  0.449  1.0
  Cu  Cu3  1  0.002  0.250  0.956  1.0
  Cu  Cu4  1  0.002  0.750  0.972  1.0
  O  O5  1  0.818  0.518  0.716  1.0
  O  O6  1  0.212  0.509  0.209  1.0
  O  O7  1  0.818  0.982  0.716  1.0
  O  O8  1  0.212  0.991  0.209  1.0
[/CIF]
.
The crystal structure described by K2Mg(CuO2)2 crystallizes in the monoclinic Pm space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to one Mg(1), two equivalent Cu(2), and four equivalent O(1) atoms. In the second K site, K(2) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. Mg(1) is bonded in a rectangular see-saw-like geometry to one K(1), two equivalent O(1), and two equivalent O(2) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(2) atoms. In the second Cu site, Cu(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent K(1), two equivalent O(1), and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one K(2), two equivalent K(1), one Mg(1), one Cu(1), and one Cu(2) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one K(2), one Mg(1), one Cu(1), and one Cu(2) atom. is represented by the CIF file [CIF]
data_K2Mg(CuO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.164
_cell_length_b   5.687
_cell_length_c   6.781
_cell_angle_alpha   90.000
_cell_angle_beta   125.611
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   161.893
_cell_formula_units_Z   1
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
  K  K0  1  0.331  0.750  0.772  1.0
  K  K1  1  0.771  0.250  0.365  1.0
  Mg  Mg2  1  0.516  0.750  0.449  1.0
  Cu  Cu3  1  0.002  0.250  0.956  1.0
  Cu  Cu4  1  0.002  0.750  0.972  1.0
  O  O5  1  0.818  0.518  0.716  1.0
  O  O6  1  0.212  0.509  0.209  1.0
  O  O7  1  0.818  0.982  0.716  1.0
  O  O8  1  0.212  0.991  0.209  1.0
[/CIF]
.