The structure described by Na2Mg(CuO2)2 crystallizes in the monoclinic Cm space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted trigonal non-coplanar geometry to one O(4) and two equivalent O(3) atoms. In the second Na site, Na(2) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(3), and two equivalent O(2) atoms. Mg(1) is bonded to one O(2), two equivalent O(1), and two equivalent O(4) atoms to form distorted edge-sharing MgO5 trigonal bipyramids. 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 rectangular see-saw-like geometry to two equivalent O(3) and two equivalent O(4) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Na(2), two equivalent Mg(1), and two equivalent Cu(1) atoms to form ONaMg2Cu2 square pyramids that share  a cornercorner with one O(3)Na3Cu2 trigonal bipyramid, corners with two equivalent O(2)Na2MgCu2 trigonal bipyramids, corners with two equivalent O(4)NaMg2Cu2 trigonal bipyramids, edges with two equivalent O(1)NaMg2Cu2 square pyramids,  an edgeedge with one O(4)NaMg2Cu2 trigonal bipyramid, and edges with three equivalent O(2)Na2MgCu2 trigonal bipyramids. In the second O site, O(2) is bonded to two equivalent Na(2), one Mg(1), and two equivalent Cu(1) atoms to form distorted ONa2MgCu2 trigonal bipyramids that share corners with two equivalent O(1)NaMg2Cu2 square pyramids, corners with two equivalent O(3)Na3Cu2 trigonal bipyramids, corners with two equivalent O(4)NaMg2Cu2 trigonal bipyramids, edges with three equivalent O(1)NaMg2Cu2 square pyramids, and edges with two equivalent O(2)Na2MgCu2 trigonal bipyramids. In the third O site, O(3) is bonded to one Na(2), two equivalent Na(1), and two equivalent Cu(2) atoms to form distorted ONa3Cu2 trigonal bipyramids that share  a cornercorner with one O(1)NaMg2Cu2 square pyramid, corners with two equivalent O(2)Na2MgCu2 trigonal bipyramids, corners with four equivalent O(4)NaMg2Cu2 trigonal bipyramids,  an edgeedge with one O(4)NaMg2Cu2 trigonal bipyramid, and edges with two equivalent O(3)Na3Cu2 trigonal bipyramids. In the fourth O site, O(4) is bonded to one Na(1), two equivalent Mg(1), and two equivalent Cu(2) atoms to form ONaMg2Cu2 trigonal bipyramids that share corners with two equivalent O(1)NaMg2Cu2 square pyramids, corners with two equivalent O(2)Na2MgCu2 trigonal bipyramids, corners with four equivalent O(3)Na3Cu2 trigonal bipyramids,  an edgeedge with one O(1)NaMg2Cu2 square pyramid,  an edgeedge with one O(3)Na3Cu2 trigonal bipyramid, and edges with two equivalent O(4)NaMg2Cu2 trigonal bipyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2Mg(CuO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.901
_cell_length_b   5.461
_cell_length_c   8.192
_cell_angle_alpha   73.176
_cell_angle_beta   89.980
_cell_angle_gamma   105.417
_symmetry_Int_Tables_number   1
_cell_volume   119.346
_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
  Na  Na0  1  0.617  0.232  0.378  1.0
  Na  Na1  1  0.370  0.740  0.112  1.0
  Mg  Mg2  1  0.952  0.903  0.772  1.0
  Cu  Cu3  1  0.167  0.333  0.918  1.0
  Cu  Cu4  1  0.844  0.686  0.499  1.0
  O  O5  1  0.551  0.101  0.870  1.0
  O  O6  1  0.774  0.547  0.969  1.0
  O  O7  1  0.276  0.551  0.393  1.0
  O  O8  1  0.428  0.854  0.604  1.0
[/CIF]
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The structure described by Na2Mg(CuO2)2 crystallizes in the monoclinic Cm space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted trigonal non-coplanar geometry to one O(4) and two equivalent O(3) atoms. In the second Na site, Na(2) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(3), and two equivalent O(2) atoms. Mg(1) is bonded to one O(2), two equivalent O(1), and two equivalent O(4) atoms to form distorted edge-sharing MgO5 trigonal bipyramids. 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 rectangular see-saw-like geometry to two equivalent O(3) and two equivalent O(4) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Na(2), two equivalent Mg(1), and two equivalent Cu(1) atoms to form ONaMg2Cu2 square pyramids that share  a cornercorner with one O(3)Na3Cu2 trigonal bipyramid, corners with two equivalent O(2)Na2MgCu2 trigonal bipyramids, corners with two equivalent O(4)NaMg2Cu2 trigonal bipyramids, edges with two equivalent O(1)NaMg2Cu2 square pyramids,  an edgeedge with one O(4)NaMg2Cu2 trigonal bipyramid, and edges with three equivalent O(2)Na2MgCu2 trigonal bipyramids. In the second O site, O(2) is bonded to two equivalent Na(2), one Mg(1), and two equivalent Cu(1) atoms to form distorted ONa2MgCu2 trigonal bipyramids that share corners with two equivalent O(1)NaMg2Cu2 square pyramids, corners with two equivalent O(3)Na3Cu2 trigonal bipyramids, corners with two equivalent O(4)NaMg2Cu2 trigonal bipyramids, edges with three equivalent O(1)NaMg2Cu2 square pyramids, and edges with two equivalent O(2)Na2MgCu2 trigonal bipyramids. In the third O site, O(3) is bonded to one Na(2), two equivalent Na(1), and two equivalent Cu(2) atoms to form distorted ONa3Cu2 trigonal bipyramids that share  a cornercorner with one O(1)NaMg2Cu2 square pyramid, corners with two equivalent O(2)Na2MgCu2 trigonal bipyramids, corners with four equivalent O(4)NaMg2Cu2 trigonal bipyramids,  an edgeedge with one O(4)NaMg2Cu2 trigonal bipyramid, and edges with two equivalent O(3)Na3Cu2 trigonal bipyramids. In the fourth O site, O(4) is bonded to one Na(1), two equivalent Mg(1), and two equivalent Cu(2) atoms to form ONaMg2Cu2 trigonal bipyramids that share corners with two equivalent O(1)NaMg2Cu2 square pyramids, corners with two equivalent O(2)Na2MgCu2 trigonal bipyramids, corners with four equivalent O(3)Na3Cu2 trigonal bipyramids,  an edgeedge with one O(1)NaMg2Cu2 square pyramid,  an edgeedge with one O(3)Na3Cu2 trigonal bipyramid, and edges with two equivalent O(4)NaMg2Cu2 trigonal bipyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2Mg(CuO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.901
_cell_length_b   5.461
_cell_length_c   8.192
_cell_angle_alpha   73.176
_cell_angle_beta   89.980
_cell_angle_gamma   105.417
_symmetry_Int_Tables_number   1
_cell_volume   119.346
_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
  Na  Na0  1  0.617  0.232  0.378  1.0
  Na  Na1  1  0.370  0.740  0.112  1.0
  Mg  Mg2  1  0.952  0.903  0.772  1.0
  Cu  Cu3  1  0.167  0.333  0.918  1.0
  Cu  Cu4  1  0.844  0.686  0.499  1.0
  O  O5  1  0.551  0.101  0.870  1.0
  O  O6  1  0.774  0.547  0.969  1.0
  O  O7  1  0.276  0.551  0.393  1.0
  O  O8  1  0.428  0.854  0.604  1.0
[/CIF]
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