The material described by MgZn(FeO2)4 crystallizes in the monoclinic Cm space group. Mg(1) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(4) atoms to form MgO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Fe(4)O6 octahedra, corners with two equivalent Zn(1)O5 square pyramids, edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra,  a faceface with one Fe(1)O6 octahedra, and  a faceface with one Fe(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 36-45°. 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 Mg(1)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(4)O6 octahedra, edges with two equivalent Zn(1)O5 square pyramids, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-47°. In the second Fe site, Fe(2) is bonded in a 5-coordinate geometry to one O(4), 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 Fe(4)O6 octahedra, corners with two equivalent Zn(1)O5 square pyramids, edges with two equivalent Mg(1)O6 octahedra, and edges with two equivalent Fe(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-55°. In the fourth Fe site, Fe(4) is bonded to one O(3), one O(5), two equivalent O(1), and two equivalent O(7) atoms to form FeO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra, corners with two equivalent Zn(1)O5 square pyramids, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(4)O6 octahedra,  an edgeedge with one Zn(1)O5 square pyramid, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 36-55°. 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 Mg(1)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra, corners with two equivalent Fe(4)O6 octahedra,  an edgeedge with one Fe(4)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, and edges with two equivalent Zn(1)O5 square pyramids. The corner-sharing octahedral tilt angles range from 2-56°. There are eight inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Mg(1), one Fe(3), and two equivalent Fe(4) atoms to form distorted OMg2Fe3 trigonal bipyramids that share corners with two equivalent O(7)Zn2Fe3 square pyramids,  a cornercorner with one O(6)Zn2Fe3 trigonal bipyramid,  an edgeedge with one O(7)Zn2Fe3 square pyramid, edges with two equivalent O(1)Mg2Fe3 trigonal bipyramids, edges with two equivalent O(2)MgFe3 trigonal pyramids, and edges with two equivalent O(3)MgFe3 trigonal pyramids. In the second O site, O(2) is bonded to one Mg(1), one Fe(1), and two equivalent Fe(3) atoms to form OMgFe3 trigonal pyramids that share  a cornercorner with one O(7)Zn2Fe3 square pyramid, corners with two equivalent O(6)Zn2Fe3 trigonal bipyramids,  a cornercorner with one O(3)MgFe3 trigonal pyramid, corners with two equivalent O(2)MgFe3 trigonal pyramids, and edges with two equivalent O(1)Mg2Fe3 trigonal bipyramids. In the third O site, O(3) is bonded to one Mg(1), one Fe(4), and two equivalent Fe(2) atoms to form distorted OMgFe3 trigonal pyramids that share corners with two equivalent O(7)Zn2Fe3 square pyramids, corners with two equivalent O(6)Zn2Fe3 trigonal bipyramids,  a cornercorner with one O(2)MgFe3 trigonal pyramid, corners with two equivalent O(3)MgFe3 trigonal pyramids,  an edgeedge with one O(6)Zn2Fe3 trigonal bipyramid, and edges with two equivalent O(1)Mg2Fe3 trigonal bipyramids. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to two equivalent Mg(1), one Fe(2), 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)Mg2Fe3 trigonal bipyramid, corners with two equivalent O(2)MgFe3 trigonal pyramids, corners with two equivalent O(3)MgFe3 trigonal pyramids,  an edgeedge with one O(7)Zn2Fe3 square pyramid, edges with two equivalent O(6)Zn2Fe3 trigonal bipyramids, and  an edgeedge with one O(3)MgFe3 trigonal pyramid. 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)Mg2Fe3 trigonal bipyramids, corners with two equivalent O(6)Zn2Fe3 trigonal bipyramids,  a cornercorner with one O(2)MgFe3 trigonal pyramid, corners with two equivalent O(3)MgFe3 trigonal pyramids, edges with two equivalent O(7)Zn2Fe3 square pyramids,  an edgeedge with one O(1)Mg2Fe3 trigonal bipyramid, and  an edgeedge with one O(6)Zn2Fe3 trigonal bipyramid. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one Fe(2) and two equivalent Fe(3) atoms. is represented by the CIF card [CIF]
data_MgZn(FeO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.984
_cell_length_b   7.741
_cell_length_c   7.949
_cell_angle_alpha   78.640
_cell_angle_beta   79.181
_cell_angle_gamma   78.881
_symmetry_Int_Tables_number   1
_cell_volume   174.488
_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  0.511  0.475  0.505  1.0
  Zn  Zn1  1  0.293  0.174  0.241  1.0
  Fe  Fe2  1  0.633  0.129  0.608  1.0
  Fe  Fe3  1  0.147  0.547  0.162  1.0
  Fe  Fe4  1  0.845  0.466  0.847  1.0
  Fe  Fe5  1  0.347  0.824  0.485  1.0
  O  O6  1  0.889  0.645  0.580  1.0
  O  O7  1  0.462  0.326  0.751  1.0
  O  O8  1  0.540  0.647  0.276  1.0
  O  O9  1  0.124  0.302  0.452  1.0
  O  O10  1  0.180  0.972  0.671  1.0
  O  O11  1  0.774  0.342  0.111  1.0
  O  O12  1  0.822  0.993  0.366  1.0
  O  O13  1  0.236  0.610  0.919  1.0
[/CIF]
.
The material described by MgZn(FeO2)4 crystallizes in the monoclinic Cm space group. Mg(1) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(4) atoms to form MgO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Fe(4)O6 octahedra, corners with two equivalent Zn(1)O5 square pyramids, edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra,  a faceface with one Fe(1)O6 octahedra, and  a faceface with one Fe(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 36-45°. 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 Mg(1)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(4)O6 octahedra, edges with two equivalent Zn(1)O5 square pyramids, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-47°. In the second Fe site, Fe(2) is bonded in a 5-coordinate geometry to one O(4), 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 Fe(4)O6 octahedra, corners with two equivalent Zn(1)O5 square pyramids, edges with two equivalent Mg(1)O6 octahedra, and edges with two equivalent Fe(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-55°. In the fourth Fe site, Fe(4) is bonded to one O(3), one O(5), two equivalent O(1), and two equivalent O(7) atoms to form FeO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra, corners with two equivalent Zn(1)O5 square pyramids, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(4)O6 octahedra,  an edgeedge with one Zn(1)O5 square pyramid, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 36-55°. 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 Mg(1)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra, corners with two equivalent Fe(4)O6 octahedra,  an edgeedge with one Fe(4)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, and edges with two equivalent Zn(1)O5 square pyramids. The corner-sharing octahedral tilt angles range from 2-56°. There are eight inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Mg(1), one Fe(3), and two equivalent Fe(4) atoms to form distorted OMg2Fe3 trigonal bipyramids that share corners with two equivalent O(7)Zn2Fe3 square pyramids,  a cornercorner with one O(6)Zn2Fe3 trigonal bipyramid,  an edgeedge with one O(7)Zn2Fe3 square pyramid, edges with two equivalent O(1)Mg2Fe3 trigonal bipyramids, edges with two equivalent O(2)MgFe3 trigonal pyramids, and edges with two equivalent O(3)MgFe3 trigonal pyramids. In the second O site, O(2) is bonded to one Mg(1), one Fe(1), and two equivalent Fe(3) atoms to form OMgFe3 trigonal pyramids that share  a cornercorner with one O(7)Zn2Fe3 square pyramid, corners with two equivalent O(6)Zn2Fe3 trigonal bipyramids,  a cornercorner with one O(3)MgFe3 trigonal pyramid, corners with two equivalent O(2)MgFe3 trigonal pyramids, and edges with two equivalent O(1)Mg2Fe3 trigonal bipyramids. In the third O site, O(3) is bonded to one Mg(1), one Fe(4), and two equivalent Fe(2) atoms to form distorted OMgFe3 trigonal pyramids that share corners with two equivalent O(7)Zn2Fe3 square pyramids, corners with two equivalent O(6)Zn2Fe3 trigonal bipyramids,  a cornercorner with one O(2)MgFe3 trigonal pyramid, corners with two equivalent O(3)MgFe3 trigonal pyramids,  an edgeedge with one O(6)Zn2Fe3 trigonal bipyramid, and edges with two equivalent O(1)Mg2Fe3 trigonal bipyramids. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to two equivalent Mg(1), one Fe(2), 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)Mg2Fe3 trigonal bipyramid, corners with two equivalent O(2)MgFe3 trigonal pyramids, corners with two equivalent O(3)MgFe3 trigonal pyramids,  an edgeedge with one O(7)Zn2Fe3 square pyramid, edges with two equivalent O(6)Zn2Fe3 trigonal bipyramids, and  an edgeedge with one O(3)MgFe3 trigonal pyramid. 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)Mg2Fe3 trigonal bipyramids, corners with two equivalent O(6)Zn2Fe3 trigonal bipyramids,  a cornercorner with one O(2)MgFe3 trigonal pyramid, corners with two equivalent O(3)MgFe3 trigonal pyramids, edges with two equivalent O(7)Zn2Fe3 square pyramids,  an edgeedge with one O(1)Mg2Fe3 trigonal bipyramid, and  an edgeedge with one O(6)Zn2Fe3 trigonal bipyramid. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one Fe(2) and two equivalent Fe(3) atoms. is represented by the CIF card [CIF]
data_MgZn(FeO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.984
_cell_length_b   7.741
_cell_length_c   7.949
_cell_angle_alpha   78.640
_cell_angle_beta   79.181
_cell_angle_gamma   78.881
_symmetry_Int_Tables_number   1
_cell_volume   174.488
_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  0.511  0.475  0.505  1.0
  Zn  Zn1  1  0.293  0.174  0.241  1.0
  Fe  Fe2  1  0.633  0.129  0.608  1.0
  Fe  Fe3  1  0.147  0.547  0.162  1.0
  Fe  Fe4  1  0.845  0.466  0.847  1.0
  Fe  Fe5  1  0.347  0.824  0.485  1.0
  O  O6  1  0.889  0.645  0.580  1.0
  O  O7  1  0.462  0.326  0.751  1.0
  O  O8  1  0.540  0.647  0.276  1.0
  O  O9  1  0.124  0.302  0.452  1.0
  O  O10  1  0.180  0.972  0.671  1.0
  O  O11  1  0.774  0.342  0.111  1.0
  O  O12  1  0.822  0.993  0.366  1.0
  O  O13  1  0.236  0.610  0.919  1.0
[/CIF]
.