The structure described by Mg(SnO2)2 is Spinel-like structured and crystallizes in the monoclinic Cm space group. There are six inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(1), one O(13), and two equivalent O(3) atoms to form MgO4 tetrahedra that share  a cornercorner with one Sn(8)O6 octahedra, corners with two equivalent Sn(2)O6 octahedra, corners with two equivalent Sn(6)O6 octahedra, corners with three equivalent Mg(3)O6 octahedra, and corners with four equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-61°. In the second Mg site, Mg(2) is bonded to one O(2), one O(5), and two equivalent O(7) atoms to form MgO4 tetrahedra that share  a cornercorner with one Sn(2)O6 octahedra, corners with two equivalent Sn(1)O6 octahedra, corners with two equivalent Sn(5)O6 octahedra, corners with three equivalent Sn(4)O6 octahedra, and corners with four equivalent Sn(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-61°. In the third Mg site, Mg(3) is bonded to one O(1), one O(18), two equivalent O(16), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra, corners with three equivalent Sn(9)O4 tetrahedra,  an edgeedge with one Sn(2)O6 octahedra,  an edgeedge with one Sn(8)O6 octahedra, edges with two equivalent Sn(1)O6 octahedra, and edges with two equivalent Sn(6)O6 octahedra. In the fourth Mg site, Mg(4) is bonded to one O(11), one O(8), and two equivalent O(14) atoms to form MgO4 tetrahedra that share  a cornercorner with one Sn(5)O6 octahedra, corners with two equivalent Sn(3)O6 octahedra, corners with two equivalent Sn(8)O6 octahedra, corners with three equivalent Sn(7)O6 octahedra, and corners with four equivalent Sn(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-67°. In the fifth Mg site, Mg(5) is bonded to one O(12), one O(9), and two equivalent O(4) atoms to form MgO4 tetrahedra that share  a cornercorner with one Sn(5)O6 octahedra, corners with two equivalent Sn(2)O6 octahedra, corners with two equivalent Sn(3)O6 octahedra, corners with three equivalent Sn(4)O6 octahedra, and corners with four equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-64°. In the sixth Mg site, Mg(6) is bonded to one O(15), one O(17), and two equivalent O(10) atoms to form MgO4 tetrahedra that share  a cornercorner with one Sn(8)O6 octahedra, corners with two equivalent Sn(5)O6 octahedra, corners with two equivalent Sn(6)O6 octahedra, corners with three equivalent Sn(7)O6 octahedra, and corners with four equivalent Sn(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-64°. There are nine inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(6), and one O(9) atom to form SnO6 octahedra that share  a cornercorner with one Mg(2)O4 tetrahedra,  a cornercorner with one Sn(9)O4 tetrahedra, corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent Mg(5)O4 tetrahedra,  an edgeedge with one Mg(3)O6 octahedra,  an edgeedge with one Sn(4)O6 octahedra, edges with two equivalent Sn(1)O6 octahedra, and edges with two equivalent Sn(2)O6 octahedra. In the second Sn site, Sn(2) is bonded to one O(2), one O(6), two equivalent O(3), and two equivalent O(4) atoms to form SnO6 octahedra that share  a cornercorner with one Mg(2)O4 tetrahedra,  a cornercorner with one Sn(9)O4 tetrahedra, corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent Mg(5)O4 tetrahedra,  an edgeedge with one Mg(3)O6 octahedra,  an edgeedge with one Sn(4)O6 octahedra, and edges with four equivalent Sn(1)O6 octahedra. In the third Sn site, Sn(3) is bonded to one O(10), one O(12), one O(15), one O(5), one O(7), and one O(8) atom to form SnO6 octahedra that share  a cornercorner with one Mg(4)O4 tetrahedra,  a cornercorner with one Mg(5)O4 tetrahedra, corners with two equivalent Mg(2)O4 tetrahedra, corners with two equivalent Mg(6)O4 tetrahedra,  an edgeedge with one Sn(4)O6 octahedra,  an edgeedge with one Sn(7)O6 octahedra, edges with two equivalent Sn(3)O6 octahedra, and edges with two equivalent Sn(5)O6 octahedra. In the fourth Sn site, Sn(4) is bonded to one O(5), one O(9), two equivalent O(4), and two equivalent O(7) atoms to form SnO6 octahedra that share corners with three equivalent Mg(2)O4 tetrahedra, corners with three equivalent Mg(5)O4 tetrahedra,  an edgeedge with one Sn(2)O6 octahedra,  an edgeedge with one Sn(5)O6 octahedra, edges with two equivalent Sn(1)O6 octahedra, and edges with two equivalent Sn(3)O6 octahedra. In the fifth Sn site, Sn(5) is bonded to one O(12), one O(8), two equivalent O(10), and two equivalent O(7) atoms to form SnO6 octahedra that share  a cornercorner with one Mg(4)O4 tetrahedra,  a cornercorner with one Mg(5)O4 tetrahedra, corners with two equivalent Mg(2)O4 tetrahedra, corners with two equivalent Mg(6)O4 tetrahedra,  an edgeedge with one Sn(4)O6 octahedra,  an edgeedge with one Sn(7)O6 octahedra, and edges with four equivalent Sn(3)O6 octahedra. In the sixth Sn site, Sn(6) is bonded to one O(11), one O(13), one O(14), one O(16), one O(17), and one O(18) atom to form SnO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra,  a cornercorner with one Mg(6)O4 tetrahedra, corners with two equivalent Mg(4)O4 tetrahedra, corners with two equivalent Sn(9)O4 tetrahedra,  an edgeedge with one Mg(3)O6 octahedra,  an edgeedge with one Sn(7)O6 octahedra, edges with two equivalent Sn(6)O6 octahedra, and edges with two equivalent Sn(8)O6 octahedra. In the seventh Sn site, Sn(7) is bonded to one O(11), one O(15), two equivalent O(10), and two equivalent O(14) atoms to form SnO6 octahedra that share corners with three equivalent Mg(4)O4 tetrahedra, corners with three equivalent Mg(6)O4 tetrahedra,  an edgeedge with one Sn(5)O6 octahedra,  an edgeedge with one Sn(8)O6 octahedra, edges with two equivalent Sn(3)O6 octahedra, and edges with two equivalent Sn(6)O6 octahedra. In the eighth Sn site, Sn(8) is bonded to one O(13), one O(17), two equivalent O(14), and two equivalent O(16) atoms to form SnO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra,  a cornercorner with one Mg(6)O4 tetrahedra, corners with two equivalent Mg(4)O4 tetrahedra, corners with two equivalent Sn(9)O4 tetrahedra,  an edgeedge with one Mg(3)O6 octahedra,  an edgeedge with one Sn(7)O6 octahedra, and edges with four equivalent Sn(6)O6 octahedra. In the ninth Sn site, Sn(9) is bonded to one O(18), one O(6), and two equivalent O(16) atoms to form SnO4 tetrahedra that share  a cornercorner with one Sn(2)O6 octahedra, corners with two equivalent Sn(1)O6 octahedra, corners with two equivalent Sn(8)O6 octahedra, corners with three equivalent Mg(3)O6 octahedra, and corners with four equivalent Sn(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-65°. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mg(3), and two equivalent Sn(1) atoms. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Mg(2), one Sn(2), and two equivalent Sn(1) atoms. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mg(3), one Sn(1), and one Sn(2) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Mg(5), one Sn(1), one Sn(2), and one Sn(4) atom. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Mg(2), one Sn(4), and two equivalent Sn(3) atoms. In the sixth O site, O(6) is bonded to one Sn(2), one Sn(9), and two equivalent Sn(1) atoms to form corner-sharing OSn4 tetrahedra. In the seventh O site, O(7) is bonded in a distorted rectangular see-saw-like geometry to one Mg(2), one Sn(3), one Sn(4), and one Sn(5) atom. In the eighth O site, O(8) is bonded in a rectangular see-saw-like geometry to one Mg(4), one Sn(5), and two equivalent Sn(3) atoms. In the ninth O site, O(9) is bonded in a distorted rectangular see-saw-like geometry to one Mg(5), one Sn(4), and two equivalent Sn(1) atoms. In the tenth O site, O(10) is bonded in a distorted rectangular see-saw-like geometry to one Mg(6), one Sn(3), one Sn(5), and one Sn(7) atom. In the eleventh O site, O(11) is bonded in a distorted rectangular see-saw-like geometry to one Mg(4), one Sn(7), and two equivalent Sn(6) atoms. In the twelfth O site, O(12) is bonded in a rectangular see-saw-like geometry to one Mg(5), one Sn(5), and two equivalent Sn(3) atoms. In the thirteenth O site, O(13) is bonded to one Mg(1), one Sn(8), and two equivalent Sn(6) atoms to form distorted corner-sharing OMgSn3 trigonal pyramids. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Mg(4), one Sn(6), one Sn(7), and one Sn(8) atom. In the fifteenth O site, O(15) is bonded in a rectangular see-saw-like geometry to one Mg(6), one Sn(7), and two equivalent Sn(3) atoms. In the sixteenth O site, O(16) is bonded to one Mg(3), one Sn(6), one Sn(8), and one Sn(9) atom to form distorted OMgSn3 tetrahedra that share  a cornercorner with one O(16)MgSn3 tetrahedra,  a cornercorner with one O(18)MgSn3 tetrahedra,  a cornercorner with one O(6)Sn4 tetrahedra, corners with two equivalent O(13)MgSn3 trigonal pyramids,  an edgeedge with one O(16)MgSn3 tetrahedra, and  an edgeedge with one O(18)MgSn3 tetrahedra. In the seventeenth O site, O(17) is bonded in a rectangular see-saw-like geometry to one Mg(6), one Sn(8), and two equivalent Sn(6) atoms. In the eighteenth O site, O(18) is bonded to one Mg(3), one Sn(9), and two equivalent Sn(6) atoms to form distorted OMgSn3 tetrahedra that share  a cornercorner with one O(6)Sn4 tetrahedra, corners with two equivalent O(16)MgSn3 tetrahedra, corners with two equivalent O(13)MgSn3 trigonal pyramids, and edges with two equivalent O(16)MgSn3 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mg(SnO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.614
_cell_length_b   6.614
_cell_length_c   15.991
_cell_angle_alpha   89.434
_cell_angle_beta   89.434
_cell_angle_gamma   60.106
_symmetry_Int_Tables_number   1
_cell_volume   606.311
_cell_formula_units_Z   6
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  0.833  0.833  0.048  1.0
  Mg  Mg1  1  0.506  0.506  0.383  1.0
  Mg  Mg2  1  0.500  0.500  1.000  1.0
  Mg  Mg3  1  0.172  0.172  0.717  1.0
  Mg  Mg4  1  0.829  0.829  0.281  1.0
  Mg  Mg5  1  0.494  0.494  0.620  1.0
  Sn  Sn6  1  0.337  0.825  0.164  1.0
  Sn  Sn7  1  0.337  0.337  0.164  1.0
  Sn  Sn8  1  0.001  0.502  0.499  1.0
  Sn  Sn9  1  0.825  0.337  0.164  1.0
  Sn  Sn10  1  0.164  0.164  0.331  1.0
  Sn  Sn11  1  0.002  0.002  0.499  1.0
  Sn  Sn12  1  0.667  0.171  0.835  1.0
  Sn  Sn13  1  0.502  0.001  0.499  1.0
  Sn  Sn14  1  0.171  0.667  0.835  1.0
  Sn  Sn15  1  0.837  0.837  0.666  1.0
  Sn  Sn16  1  0.666  0.666  0.834  1.0
  Sn  Sn17  1  0.166  0.166  0.949  1.0
  O  O18  1  0.652  0.652  0.082  1.0
  O  O19  1  0.496  0.496  0.247  1.0
  O  O20  1  0.198  0.648  0.082  1.0
  O  O21  1  0.648  0.198  0.082  1.0
  O  O22  1  0.002  0.503  0.230  1.0
  O  O23  1  0.330  0.330  0.429  1.0
  O  O24  1  0.503  0.002  0.230  1.0
  O  O25  1  0.168  0.168  0.104  1.0
  O  O26  1  0.838  0.361  0.426  1.0
  O  O27  1  0.179  0.179  0.578  1.0
  O  O28  1  0.995  0.995  0.231  1.0
  O  O29  1  0.361  0.838  0.426  1.0
  O  O30  1  0.632  0.162  0.579  1.0
  O  O31  1  0.008  0.008  0.771  1.0
  O  O32  1  0.162  0.632  0.579  1.0
  O  O33  1  0.816  0.816  0.419  1.0
  O  O34  1  0.833  0.833  0.910  1.0
  O  O35  1  0.490  0.004  0.773  1.0
  O  O36  1  0.674  0.674  0.573  1.0
  O  O37  1  0.004  0.490  0.773  1.0
  O  O38  1  0.365  0.773  0.911  1.0
  O  O39  1  0.503  0.503  0.755  1.0
  O  O40  1  0.773  0.365  0.911  1.0
  O  O41  1  0.362  0.362  0.911  1.0
[/CIF]
.
The structure described by Mg(SnO2)2 is Spinel-like structured and crystallizes in the monoclinic Cm space group. There are six inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(1), one O(13), and two equivalent O(3) atoms to form MgO4 tetrahedra that share  a cornercorner with one Sn(8)O6 octahedra, corners with two equivalent Sn(2)O6 octahedra, corners with two equivalent Sn(6)O6 octahedra, corners with three equivalent Mg(3)O6 octahedra, and corners with four equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-61°. In the second Mg site, Mg(2) is bonded to one O(2), one O(5), and two equivalent O(7) atoms to form MgO4 tetrahedra that share  a cornercorner with one Sn(2)O6 octahedra, corners with two equivalent Sn(1)O6 octahedra, corners with two equivalent Sn(5)O6 octahedra, corners with three equivalent Sn(4)O6 octahedra, and corners with four equivalent Sn(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-61°. In the third Mg site, Mg(3) is bonded to one O(1), one O(18), two equivalent O(16), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra, corners with three equivalent Sn(9)O4 tetrahedra,  an edgeedge with one Sn(2)O6 octahedra,  an edgeedge with one Sn(8)O6 octahedra, edges with two equivalent Sn(1)O6 octahedra, and edges with two equivalent Sn(6)O6 octahedra. In the fourth Mg site, Mg(4) is bonded to one O(11), one O(8), and two equivalent O(14) atoms to form MgO4 tetrahedra that share  a cornercorner with one Sn(5)O6 octahedra, corners with two equivalent Sn(3)O6 octahedra, corners with two equivalent Sn(8)O6 octahedra, corners with three equivalent Sn(7)O6 octahedra, and corners with four equivalent Sn(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-67°. In the fifth Mg site, Mg(5) is bonded to one O(12), one O(9), and two equivalent O(4) atoms to form MgO4 tetrahedra that share  a cornercorner with one Sn(5)O6 octahedra, corners with two equivalent Sn(2)O6 octahedra, corners with two equivalent Sn(3)O6 octahedra, corners with three equivalent Sn(4)O6 octahedra, and corners with four equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-64°. In the sixth Mg site, Mg(6) is bonded to one O(15), one O(17), and two equivalent O(10) atoms to form MgO4 tetrahedra that share  a cornercorner with one Sn(8)O6 octahedra, corners with two equivalent Sn(5)O6 octahedra, corners with two equivalent Sn(6)O6 octahedra, corners with three equivalent Sn(7)O6 octahedra, and corners with four equivalent Sn(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-64°. There are nine inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(6), and one O(9) atom to form SnO6 octahedra that share  a cornercorner with one Mg(2)O4 tetrahedra,  a cornercorner with one Sn(9)O4 tetrahedra, corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent Mg(5)O4 tetrahedra,  an edgeedge with one Mg(3)O6 octahedra,  an edgeedge with one Sn(4)O6 octahedra, edges with two equivalent Sn(1)O6 octahedra, and edges with two equivalent Sn(2)O6 octahedra. In the second Sn site, Sn(2) is bonded to one O(2), one O(6), two equivalent O(3), and two equivalent O(4) atoms to form SnO6 octahedra that share  a cornercorner with one Mg(2)O4 tetrahedra,  a cornercorner with one Sn(9)O4 tetrahedra, corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent Mg(5)O4 tetrahedra,  an edgeedge with one Mg(3)O6 octahedra,  an edgeedge with one Sn(4)O6 octahedra, and edges with four equivalent Sn(1)O6 octahedra. In the third Sn site, Sn(3) is bonded to one O(10), one O(12), one O(15), one O(5), one O(7), and one O(8) atom to form SnO6 octahedra that share  a cornercorner with one Mg(4)O4 tetrahedra,  a cornercorner with one Mg(5)O4 tetrahedra, corners with two equivalent Mg(2)O4 tetrahedra, corners with two equivalent Mg(6)O4 tetrahedra,  an edgeedge with one Sn(4)O6 octahedra,  an edgeedge with one Sn(7)O6 octahedra, edges with two equivalent Sn(3)O6 octahedra, and edges with two equivalent Sn(5)O6 octahedra. In the fourth Sn site, Sn(4) is bonded to one O(5), one O(9), two equivalent O(4), and two equivalent O(7) atoms to form SnO6 octahedra that share corners with three equivalent Mg(2)O4 tetrahedra, corners with three equivalent Mg(5)O4 tetrahedra,  an edgeedge with one Sn(2)O6 octahedra,  an edgeedge with one Sn(5)O6 octahedra, edges with two equivalent Sn(1)O6 octahedra, and edges with two equivalent Sn(3)O6 octahedra. In the fifth Sn site, Sn(5) is bonded to one O(12), one O(8), two equivalent O(10), and two equivalent O(7) atoms to form SnO6 octahedra that share  a cornercorner with one Mg(4)O4 tetrahedra,  a cornercorner with one Mg(5)O4 tetrahedra, corners with two equivalent Mg(2)O4 tetrahedra, corners with two equivalent Mg(6)O4 tetrahedra,  an edgeedge with one Sn(4)O6 octahedra,  an edgeedge with one Sn(7)O6 octahedra, and edges with four equivalent Sn(3)O6 octahedra. In the sixth Sn site, Sn(6) is bonded to one O(11), one O(13), one O(14), one O(16), one O(17), and one O(18) atom to form SnO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra,  a cornercorner with one Mg(6)O4 tetrahedra, corners with two equivalent Mg(4)O4 tetrahedra, corners with two equivalent Sn(9)O4 tetrahedra,  an edgeedge with one Mg(3)O6 octahedra,  an edgeedge with one Sn(7)O6 octahedra, edges with two equivalent Sn(6)O6 octahedra, and edges with two equivalent Sn(8)O6 octahedra. In the seventh Sn site, Sn(7) is bonded to one O(11), one O(15), two equivalent O(10), and two equivalent O(14) atoms to form SnO6 octahedra that share corners with three equivalent Mg(4)O4 tetrahedra, corners with three equivalent Mg(6)O4 tetrahedra,  an edgeedge with one Sn(5)O6 octahedra,  an edgeedge with one Sn(8)O6 octahedra, edges with two equivalent Sn(3)O6 octahedra, and edges with two equivalent Sn(6)O6 octahedra. In the eighth Sn site, Sn(8) is bonded to one O(13), one O(17), two equivalent O(14), and two equivalent O(16) atoms to form SnO6 octahedra that share  a cornercorner with one Mg(1)O4 tetrahedra,  a cornercorner with one Mg(6)O4 tetrahedra, corners with two equivalent Mg(4)O4 tetrahedra, corners with two equivalent Sn(9)O4 tetrahedra,  an edgeedge with one Mg(3)O6 octahedra,  an edgeedge with one Sn(7)O6 octahedra, and edges with four equivalent Sn(6)O6 octahedra. In the ninth Sn site, Sn(9) is bonded to one O(18), one O(6), and two equivalent O(16) atoms to form SnO4 tetrahedra that share  a cornercorner with one Sn(2)O6 octahedra, corners with two equivalent Sn(1)O6 octahedra, corners with two equivalent Sn(8)O6 octahedra, corners with three equivalent Mg(3)O6 octahedra, and corners with four equivalent Sn(6)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-65°. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mg(3), and two equivalent Sn(1) atoms. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Mg(2), one Sn(2), and two equivalent Sn(1) atoms. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mg(3), one Sn(1), and one Sn(2) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Mg(5), one Sn(1), one Sn(2), and one Sn(4) atom. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Mg(2), one Sn(4), and two equivalent Sn(3) atoms. In the sixth O site, O(6) is bonded to one Sn(2), one Sn(9), and two equivalent Sn(1) atoms to form corner-sharing OSn4 tetrahedra. In the seventh O site, O(7) is bonded in a distorted rectangular see-saw-like geometry to one Mg(2), one Sn(3), one Sn(4), and one Sn(5) atom. In the eighth O site, O(8) is bonded in a rectangular see-saw-like geometry to one Mg(4), one Sn(5), and two equivalent Sn(3) atoms. In the ninth O site, O(9) is bonded in a distorted rectangular see-saw-like geometry to one Mg(5), one Sn(4), and two equivalent Sn(1) atoms. In the tenth O site, O(10) is bonded in a distorted rectangular see-saw-like geometry to one Mg(6), one Sn(3), one Sn(5), and one Sn(7) atom. In the eleventh O site, O(11) is bonded in a distorted rectangular see-saw-like geometry to one Mg(4), one Sn(7), and two equivalent Sn(6) atoms. In the twelfth O site, O(12) is bonded in a rectangular see-saw-like geometry to one Mg(5), one Sn(5), and two equivalent Sn(3) atoms. In the thirteenth O site, O(13) is bonded to one Mg(1), one Sn(8), and two equivalent Sn(6) atoms to form distorted corner-sharing OMgSn3 trigonal pyramids. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Mg(4), one Sn(6), one Sn(7), and one Sn(8) atom. In the fifteenth O site, O(15) is bonded in a rectangular see-saw-like geometry to one Mg(6), one Sn(7), and two equivalent Sn(3) atoms. In the sixteenth O site, O(16) is bonded to one Mg(3), one Sn(6), one Sn(8), and one Sn(9) atom to form distorted OMgSn3 tetrahedra that share  a cornercorner with one O(16)MgSn3 tetrahedra,  a cornercorner with one O(18)MgSn3 tetrahedra,  a cornercorner with one O(6)Sn4 tetrahedra, corners with two equivalent O(13)MgSn3 trigonal pyramids,  an edgeedge with one O(16)MgSn3 tetrahedra, and  an edgeedge with one O(18)MgSn3 tetrahedra. In the seventeenth O site, O(17) is bonded in a rectangular see-saw-like geometry to one Mg(6), one Sn(8), and two equivalent Sn(6) atoms. In the eighteenth O site, O(18) is bonded to one Mg(3), one Sn(9), and two equivalent Sn(6) atoms to form distorted OMgSn3 tetrahedra that share  a cornercorner with one O(6)Sn4 tetrahedra, corners with two equivalent O(16)MgSn3 tetrahedra, corners with two equivalent O(13)MgSn3 trigonal pyramids, and edges with two equivalent O(16)MgSn3 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mg(SnO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.614
_cell_length_b   6.614
_cell_length_c   15.991
_cell_angle_alpha   89.434
_cell_angle_beta   89.434
_cell_angle_gamma   60.106
_symmetry_Int_Tables_number   1
_cell_volume   606.311
_cell_formula_units_Z   6
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  0.833  0.833  0.048  1.0
  Mg  Mg1  1  0.506  0.506  0.383  1.0
  Mg  Mg2  1  0.500  0.500  1.000  1.0
  Mg  Mg3  1  0.172  0.172  0.717  1.0
  Mg  Mg4  1  0.829  0.829  0.281  1.0
  Mg  Mg5  1  0.494  0.494  0.620  1.0
  Sn  Sn6  1  0.337  0.825  0.164  1.0
  Sn  Sn7  1  0.337  0.337  0.164  1.0
  Sn  Sn8  1  0.001  0.502  0.499  1.0
  Sn  Sn9  1  0.825  0.337  0.164  1.0
  Sn  Sn10  1  0.164  0.164  0.331  1.0
  Sn  Sn11  1  0.002  0.002  0.499  1.0
  Sn  Sn12  1  0.667  0.171  0.835  1.0
  Sn  Sn13  1  0.502  0.001  0.499  1.0
  Sn  Sn14  1  0.171  0.667  0.835  1.0
  Sn  Sn15  1  0.837  0.837  0.666  1.0
  Sn  Sn16  1  0.666  0.666  0.834  1.0
  Sn  Sn17  1  0.166  0.166  0.949  1.0
  O  O18  1  0.652  0.652  0.082  1.0
  O  O19  1  0.496  0.496  0.247  1.0
  O  O20  1  0.198  0.648  0.082  1.0
  O  O21  1  0.648  0.198  0.082  1.0
  O  O22  1  0.002  0.503  0.230  1.0
  O  O23  1  0.330  0.330  0.429  1.0
  O  O24  1  0.503  0.002  0.230  1.0
  O  O25  1  0.168  0.168  0.104  1.0
  O  O26  1  0.838  0.361  0.426  1.0
  O  O27  1  0.179  0.179  0.578  1.0
  O  O28  1  0.995  0.995  0.231  1.0
  O  O29  1  0.361  0.838  0.426  1.0
  O  O30  1  0.632  0.162  0.579  1.0
  O  O31  1  0.008  0.008  0.771  1.0
  O  O32  1  0.162  0.632  0.579  1.0
  O  O33  1  0.816  0.816  0.419  1.0
  O  O34  1  0.833  0.833  0.910  1.0
  O  O35  1  0.490  0.004  0.773  1.0
  O  O36  1  0.674  0.674  0.573  1.0
  O  O37  1  0.004  0.490  0.773  1.0
  O  O38  1  0.365  0.773  0.911  1.0
  O  O39  1  0.503  0.503  0.755  1.0
  O  O40  1  0.773  0.365  0.911  1.0
  O  O41  1  0.362  0.362  0.911  1.0
[/CIF]
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