The material structure described by MgMn3Cd2O8 crystallizes in the monoclinic Cm space group. Mg(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(4), and two equivalent O(5) atoms. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(3), one O(4), two equivalent O(5), and two equivalent O(6) atoms to form edge-sharing MnO6 octahedra. In the second Mn site, Mn(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form distorted edge-sharing MnO6 octahedra. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), two equivalent O(5), and two equivalent O(6) atoms. In the second Cd site, Cd(2) is bonded in a 6-coordinate geometry to one O(1), one O(2), two equivalent O(5), and two equivalent O(6) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), two equivalent Mn(2), and one Cd(2) atom to form a mixture of distorted corner and edge-sharing OMgMn2Cd trigonal pyramids. In the second O site, O(2) is bonded to two equivalent Mn(2), one Cd(1), and one Cd(2) atom to form distorted OMn2Cd2 trigonal pyramids that share  a cornercorner with one O(1)MgMn2Cd trigonal pyramid, corners with two equivalent O(6)Mn2Cd2 trigonal pyramids,  an edgeedge with one O(1)MgMn2Cd trigonal pyramid, and edges with two equivalent O(6)Mn2Cd2 trigonal pyramids. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mn(1), two equivalent Mn(2), and one Cd(1) atom. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mn(1), and two equivalent Mn(2) atoms. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Mg(1), one Mn(1), one Mn(2), one Cd(1), and one Cd(2) atom. In the sixth O site, O(6) is bonded to one Mn(1), one Mn(2), one Cd(1), and one Cd(2) atom to form distorted OMn2Cd2 trigonal pyramids that share  a cornercorner with one O(2)Mn2Cd2 trigonal pyramid,  a cornercorner with one O(6)Mn2Cd2 trigonal pyramid, corners with two equivalent O(1)MgMn2Cd trigonal pyramids,  an edgeedge with one O(2)Mn2Cd2 trigonal pyramid, and  an edgeedge with one O(6)Mn2Cd2 trigonal pyramid. is represented by the CIF file [CIF]
data_MgMn3Cd2O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.358
_cell_length_b   6.174
_cell_length_c   6.264
_cell_angle_alpha   119.525
_cell_angle_beta   88.709
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   180.255
_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  0.136  0.186  0.372  1.0
  Mn  Mn1  1  0.511  0.990  0.980  1.0
  Mn  Mn2  1  0.002  0.719  0.942  1.0
  Mn  Mn3  1  0.002  0.222  0.942  1.0
  Cd  Cd4  1  0.534  0.708  0.416  1.0
  Cd  Cd5  1  0.500  0.428  0.857  1.0
  O  O6  1  0.115  0.363  0.725  1.0
  O  O7  1  0.861  0.561  0.123  1.0
  O  O8  1  0.193  0.897  0.793  1.0
  O  O9  1  0.841  0.074  0.148  1.0
  O  O10  1  0.341  0.316  0.185  1.0
  O  O11  1  0.341  0.869  0.185  1.0
  O  O12  1  0.662  0.074  0.749  1.0
  O  O13  1  0.662  0.676  0.749  1.0
[/CIF]
.
The material structure described by MgMn3Cd2O8 crystallizes in the monoclinic Cm space group. Mg(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(4), and two equivalent O(5) atoms. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(3), one O(4), two equivalent O(5), and two equivalent O(6) atoms to form edge-sharing MnO6 octahedra. In the second Mn site, Mn(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form distorted edge-sharing MnO6 octahedra. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), two equivalent O(5), and two equivalent O(6) atoms. In the second Cd site, Cd(2) is bonded in a 6-coordinate geometry to one O(1), one O(2), two equivalent O(5), and two equivalent O(6) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), two equivalent Mn(2), and one Cd(2) atom to form a mixture of distorted corner and edge-sharing OMgMn2Cd trigonal pyramids. In the second O site, O(2) is bonded to two equivalent Mn(2), one Cd(1), and one Cd(2) atom to form distorted OMn2Cd2 trigonal pyramids that share  a cornercorner with one O(1)MgMn2Cd trigonal pyramid, corners with two equivalent O(6)Mn2Cd2 trigonal pyramids,  an edgeedge with one O(1)MgMn2Cd trigonal pyramid, and edges with two equivalent O(6)Mn2Cd2 trigonal pyramids. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mn(1), two equivalent Mn(2), and one Cd(1) atom. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mn(1), and two equivalent Mn(2) atoms. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Mg(1), one Mn(1), one Mn(2), one Cd(1), and one Cd(2) atom. In the sixth O site, O(6) is bonded to one Mn(1), one Mn(2), one Cd(1), and one Cd(2) atom to form distorted OMn2Cd2 trigonal pyramids that share  a cornercorner with one O(2)Mn2Cd2 trigonal pyramid,  a cornercorner with one O(6)Mn2Cd2 trigonal pyramid, corners with two equivalent O(1)MgMn2Cd trigonal pyramids,  an edgeedge with one O(2)Mn2Cd2 trigonal pyramid, and  an edgeedge with one O(6)Mn2Cd2 trigonal pyramid. is represented by the CIF file [CIF]
data_MgMn3Cd2O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.358
_cell_length_b   6.174
_cell_length_c   6.264
_cell_angle_alpha   119.525
_cell_angle_beta   88.709
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   180.255
_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  0.136  0.186  0.372  1.0
  Mn  Mn1  1  0.511  0.990  0.980  1.0
  Mn  Mn2  1  0.002  0.719  0.942  1.0
  Mn  Mn3  1  0.002  0.222  0.942  1.0
  Cd  Cd4  1  0.534  0.708  0.416  1.0
  Cd  Cd5  1  0.500  0.428  0.857  1.0
  O  O6  1  0.115  0.363  0.725  1.0
  O  O7  1  0.861  0.561  0.123  1.0
  O  O8  1  0.193  0.897  0.793  1.0
  O  O9  1  0.841  0.074  0.148  1.0
  O  O10  1  0.341  0.316  0.185  1.0
  O  O11  1  0.341  0.869  0.185  1.0
  O  O12  1  0.662  0.074  0.749  1.0
  O  O13  1  0.662  0.676  0.749  1.0
[/CIF]
.