The structure described by MgZn(FeO2)4 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(4), and two equivalent O(3) atoms. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(2), one O(7), two equivalent O(4), and two equivalent O(5) atoms to form distorted FeO6 octahedra that share corners with two equivalent Fe(3)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(4)O6 pentagonal pyramids, and edges with two equivalent Zn(1)O5 square pyramids. The corner-sharing octahedral tilt angles are 51°. In the second Fe site, Fe(2) is bonded in a 5-coordinate geometry to one O(8), two equivalent O(3), and two equivalent O(6) atoms. In the third Fe site, Fe(3) is bonded to one O(1), one O(6), two equivalent O(2), and two equivalent O(8) atoms to form FeO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Zn(1)O5 square pyramids, edges with two equivalent Fe(3)O6 octahedra, and edges with two equivalent Fe(4)O6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 51°. In the fourth Fe site, Fe(4) is bonded to one O(5), one O(8), two equivalent O(1), and two equivalent O(7) atoms to form distorted FeO6 pentagonal pyramids that share corners with two equivalent Zn(1)O5 square pyramids, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, edges with two equivalent Fe(4)O6 pentagonal pyramids, and  an edgeedge with one Zn(1)O5 square pyramid. Zn(1) is bonded to one O(4), two equivalent O(6), and two equivalent O(7) atoms to form ZnO5 square pyramids that share corners with two equivalent Fe(3)O6 octahedra, corners with two equivalent Fe(4)O6 pentagonal pyramids, edges with two equivalent Fe(1)O6 octahedra,  an edgeedge with one Fe(4)O6 pentagonal pyramid, and edges with two equivalent Zn(1)O5 square pyramids. The corner-sharing octahedral tilt angles range from 50-51°. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Fe(3), and two equivalent Fe(4) atoms to form OMgFe3 tetrahedra that share corners with two equivalent O(7)Zn2Fe3 square pyramids, corners with two equivalent O(1)MgFe3 tetrahedra,  a cornercorner with one O(6)Zn2Fe3 trigonal bipyramid,  an edgeedge with one O(7)Zn2Fe3 square pyramid, and edges with two equivalent O(8)Fe4 trigonal pyramids. In the second O site, O(2) is bonded in a trigonal planar geometry to one Fe(1) and two equivalent Fe(3) atoms. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Mg(1) and two equivalent Fe(2) atoms. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), two equivalent Fe(1), and one Zn(1) atom. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Fe(4) and two equivalent Fe(1) atoms. In the sixth O site, O(6) is bonded to one Fe(3), two equivalent Fe(2), and two equivalent Zn(1) atoms to form distorted OZn2Fe3 trigonal bipyramids that share corners with two equivalent O(7)Zn2Fe3 square pyramids,  a cornercorner with one O(1)MgFe3 tetrahedra,  an edgeedge with one O(7)Zn2Fe3 square pyramid, edges with two equivalent O(6)Zn2Fe3 trigonal bipyramids, and edges with two equivalent O(8)Fe4 trigonal pyramids. In the seventh O site, O(7) is bonded to one Fe(1), two equivalent Fe(4), and two equivalent Zn(1) atoms to form OZn2Fe3 square pyramids that share corners with two equivalent O(1)MgFe3 tetrahedra, corners with two equivalent O(6)Zn2Fe3 trigonal bipyramids, corners with two equivalent O(8)Fe4 trigonal pyramids, edges with two equivalent O(7)Zn2Fe3 square pyramids,  an edgeedge with one O(1)MgFe3 tetrahedra, and  an edgeedge with one O(6)Zn2Fe3 trigonal bipyramid. In the eighth O site, O(8) is bonded to one Fe(2), one Fe(4), and two equivalent Fe(3) atoms to form distorted OFe4 trigonal pyramids that share corners with two equivalent O(7)Zn2Fe3 square pyramids, corners with two equivalent O(8)Fe4 trigonal pyramids, edges with two equivalent O(1)MgFe3 tetrahedra, and edges with two equivalent O(6)Zn2Fe3 trigonal bipyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgZn(FeO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.971
_cell_length_b   8.232
_cell_length_c   8.370
_cell_angle_alpha   65.998
_cell_angle_beta   79.663
_cell_angle_gamma   79.424
_symmetry_Int_Tables_number   1
_cell_volume   182.577
_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
  Mg  Mg0  1  0.017  0.573  0.391  1.0
  Zn  Zn1  1  0.279  0.177  0.280  1.0
  Fe  Fe2  1  0.612  0.167  0.616  1.0
  Fe  Fe3  1  0.185  0.535  0.093  1.0
  Fe  Fe4  1  0.870  0.449  0.810  1.0
  Fe  Fe5  1  0.286  0.831  0.596  1.0
  O  O6  1  0.879  0.670  0.569  1.0
  O  O7  1  0.463  0.323  0.754  1.0
  O  O8  1  0.583  0.624  0.208  1.0
  O  O9  1  0.123  0.315  0.446  1.0
  O  O10  1  0.149  0.994  0.717  1.0
  O  O11  1  0.779  0.345  0.094  1.0
  O  O12  1  0.790  0.011  0.426  1.0
  O  O13  1  0.267  0.615  0.848  1.0
[/CIF]
.
The structure described by MgZn(FeO2)4 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(4), and two equivalent O(3) atoms. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(2), one O(7), two equivalent O(4), and two equivalent O(5) atoms to form distorted FeO6 octahedra that share corners with two equivalent Fe(3)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(4)O6 pentagonal pyramids, and edges with two equivalent Zn(1)O5 square pyramids. The corner-sharing octahedral tilt angles are 51°. In the second Fe site, Fe(2) is bonded in a 5-coordinate geometry to one O(8), two equivalent O(3), and two equivalent O(6) atoms. In the third Fe site, Fe(3) is bonded to one O(1), one O(6), two equivalent O(2), and two equivalent O(8) atoms to form FeO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Zn(1)O5 square pyramids, edges with two equivalent Fe(3)O6 octahedra, and edges with two equivalent Fe(4)O6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 51°. In the fourth Fe site, Fe(4) is bonded to one O(5), one O(8), two equivalent O(1), and two equivalent O(7) atoms to form distorted FeO6 pentagonal pyramids that share corners with two equivalent Zn(1)O5 square pyramids, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, edges with two equivalent Fe(4)O6 pentagonal pyramids, and  an edgeedge with one Zn(1)O5 square pyramid. Zn(1) is bonded to one O(4), two equivalent O(6), and two equivalent O(7) atoms to form ZnO5 square pyramids that share corners with two equivalent Fe(3)O6 octahedra, corners with two equivalent Fe(4)O6 pentagonal pyramids, edges with two equivalent Fe(1)O6 octahedra,  an edgeedge with one Fe(4)O6 pentagonal pyramid, and edges with two equivalent Zn(1)O5 square pyramids. The corner-sharing octahedral tilt angles range from 50-51°. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Fe(3), and two equivalent Fe(4) atoms to form OMgFe3 tetrahedra that share corners with two equivalent O(7)Zn2Fe3 square pyramids, corners with two equivalent O(1)MgFe3 tetrahedra,  a cornercorner with one O(6)Zn2Fe3 trigonal bipyramid,  an edgeedge with one O(7)Zn2Fe3 square pyramid, and edges with two equivalent O(8)Fe4 trigonal pyramids. In the second O site, O(2) is bonded in a trigonal planar geometry to one Fe(1) and two equivalent Fe(3) atoms. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Mg(1) and two equivalent Fe(2) atoms. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), two equivalent Fe(1), and one Zn(1) atom. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Fe(4) and two equivalent Fe(1) atoms. In the sixth O site, O(6) is bonded to one Fe(3), two equivalent Fe(2), and two equivalent Zn(1) atoms to form distorted OZn2Fe3 trigonal bipyramids that share corners with two equivalent O(7)Zn2Fe3 square pyramids,  a cornercorner with one O(1)MgFe3 tetrahedra,  an edgeedge with one O(7)Zn2Fe3 square pyramid, edges with two equivalent O(6)Zn2Fe3 trigonal bipyramids, and edges with two equivalent O(8)Fe4 trigonal pyramids. In the seventh O site, O(7) is bonded to one Fe(1), two equivalent Fe(4), and two equivalent Zn(1) atoms to form OZn2Fe3 square pyramids that share corners with two equivalent O(1)MgFe3 tetrahedra, corners with two equivalent O(6)Zn2Fe3 trigonal bipyramids, corners with two equivalent O(8)Fe4 trigonal pyramids, edges with two equivalent O(7)Zn2Fe3 square pyramids,  an edgeedge with one O(1)MgFe3 tetrahedra, and  an edgeedge with one O(6)Zn2Fe3 trigonal bipyramid. In the eighth O site, O(8) is bonded to one Fe(2), one Fe(4), and two equivalent Fe(3) atoms to form distorted OFe4 trigonal pyramids that share corners with two equivalent O(7)Zn2Fe3 square pyramids, corners with two equivalent O(8)Fe4 trigonal pyramids, edges with two equivalent O(1)MgFe3 tetrahedra, and edges with two equivalent O(6)Zn2Fe3 trigonal bipyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgZn(FeO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.971
_cell_length_b   8.232
_cell_length_c   8.370
_cell_angle_alpha   65.998
_cell_angle_beta   79.663
_cell_angle_gamma   79.424
_symmetry_Int_Tables_number   1
_cell_volume   182.577
_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
  Mg  Mg0  1  0.017  0.573  0.391  1.0
  Zn  Zn1  1  0.279  0.177  0.280  1.0
  Fe  Fe2  1  0.612  0.167  0.616  1.0
  Fe  Fe3  1  0.185  0.535  0.093  1.0
  Fe  Fe4  1  0.870  0.449  0.810  1.0
  Fe  Fe5  1  0.286  0.831  0.596  1.0
  O  O6  1  0.879  0.670  0.569  1.0
  O  O7  1  0.463  0.323  0.754  1.0
  O  O8  1  0.583  0.624  0.208  1.0
  O  O9  1  0.123  0.315  0.446  1.0
  O  O10  1  0.149  0.994  0.717  1.0
  O  O11  1  0.779  0.345  0.094  1.0
  O  O12  1  0.790  0.011  0.426  1.0
  O  O13  1  0.267  0.615  0.848  1.0
[/CIF]
.