The material structure described by Mg(SnO2)2 is Spinel-like structured and crystallizes in the trigonal R3m space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(3) and three equivalent O(4) atoms to form MgO4 tetrahedra that share corners with three equivalent Mg(2)O6 octahedra and corners with nine equivalent Sn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-58°. In the second Mg site, Mg(2) is bonded to three equivalent O(1) and three equivalent O(4) atoms to form MgO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra, corners with three equivalent Sn(1)O4 tetrahedra, and edges with six equivalent Sn(2)O6 octahedra. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(2) and three equivalent O(1) atoms to form SnO4 tetrahedra that share corners with three equivalent Mg(2)O6 octahedra and corners with nine equivalent Sn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 59-63°. In the second Sn site, Sn(2) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(4) atoms to form SnO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra, corners with three equivalent Sn(1)O4 tetrahedra, edges with two equivalent Mg(2)O6 octahedra, and edges with four equivalent Sn(2)O6 octahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Mg(2), one Sn(1), and two equivalent Sn(2) atoms to form distorted OMgSn3 tetrahedra that share  a cornercorner with one O(2)Sn4 tetrahedra, corners with two equivalent O(1)MgSn3 tetrahedra,  an edgeedge with one O(2)Sn4 tetrahedra, and edges with two equivalent O(1)MgSn3 tetrahedra. In the second O site, O(2) is bonded to one Sn(1) and three equivalent Sn(2) atoms to form a mixture of corner and edge-sharing OSn4 tetrahedra. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1) and three equivalent Sn(2) atoms. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Mg(2), and two equivalent Sn(2) atoms. is represented by the CIF file [CIF]
data_Mg(SnO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.527
_cell_length_b   6.527
_cell_length_c   6.527
_cell_angle_alpha   61.101
_cell_angle_beta   61.101
_cell_angle_gamma   61.101
_symmetry_Int_Tables_number   1
_cell_volume   201.461
_cell_formula_units_Z   2
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  0.996  0.996  0.996  1.0
  Mg  Mg1  1  0.375  0.375  0.375  1.0
  Sn  Sn2  1  0.755  0.755  0.755  1.0
  Sn  Sn3  1  0.373  0.878  0.373  1.0
  Sn  Sn4  1  0.878  0.373  0.373  1.0
  Sn  Sn5  1  0.373  0.373  0.878  1.0
  O  O6  1  0.605  0.605  0.186  1.0
  O  O7  1  0.186  0.605  0.605  1.0
  O  O8  1  0.605  0.186  0.605  1.0
  O  O9  1  0.607  0.607  0.607  1.0
  O  O10  1  0.129  0.129  0.129  1.0
  O  O11  1  0.134  0.599  0.134  1.0
  O  O12  1  0.599  0.134  0.134  1.0
  O  O13  1  0.134  0.134  0.599  1.0
[/CIF]
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The material structure described by Mg(SnO2)2 is Spinel-like structured and crystallizes in the trigonal R3m space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(3) and three equivalent O(4) atoms to form MgO4 tetrahedra that share corners with three equivalent Mg(2)O6 octahedra and corners with nine equivalent Sn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-58°. In the second Mg site, Mg(2) is bonded to three equivalent O(1) and three equivalent O(4) atoms to form MgO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra, corners with three equivalent Sn(1)O4 tetrahedra, and edges with six equivalent Sn(2)O6 octahedra. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(2) and three equivalent O(1) atoms to form SnO4 tetrahedra that share corners with three equivalent Mg(2)O6 octahedra and corners with nine equivalent Sn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 59-63°. In the second Sn site, Sn(2) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(4) atoms to form SnO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra, corners with three equivalent Sn(1)O4 tetrahedra, edges with two equivalent Mg(2)O6 octahedra, and edges with four equivalent Sn(2)O6 octahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Mg(2), one Sn(1), and two equivalent Sn(2) atoms to form distorted OMgSn3 tetrahedra that share  a cornercorner with one O(2)Sn4 tetrahedra, corners with two equivalent O(1)MgSn3 tetrahedra,  an edgeedge with one O(2)Sn4 tetrahedra, and edges with two equivalent O(1)MgSn3 tetrahedra. In the second O site, O(2) is bonded to one Sn(1) and three equivalent Sn(2) atoms to form a mixture of corner and edge-sharing OSn4 tetrahedra. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1) and three equivalent Sn(2) atoms. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Mg(2), and two equivalent Sn(2) atoms. is represented by the CIF file [CIF]
data_Mg(SnO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.527
_cell_length_b   6.527
_cell_length_c   6.527
_cell_angle_alpha   61.101
_cell_angle_beta   61.101
_cell_angle_gamma   61.101
_symmetry_Int_Tables_number   1
_cell_volume   201.461
_cell_formula_units_Z   2
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  0.996  0.996  0.996  1.0
  Mg  Mg1  1  0.375  0.375  0.375  1.0
  Sn  Sn2  1  0.755  0.755  0.755  1.0
  Sn  Sn3  1  0.373  0.878  0.373  1.0
  Sn  Sn4  1  0.878  0.373  0.373  1.0
  Sn  Sn5  1  0.373  0.373  0.878  1.0
  O  O6  1  0.605  0.605  0.186  1.0
  O  O7  1  0.186  0.605  0.605  1.0
  O  O8  1  0.605  0.186  0.605  1.0
  O  O9  1  0.607  0.607  0.607  1.0
  O  O10  1  0.129  0.129  0.129  1.0
  O  O11  1  0.134  0.599  0.134  1.0
  O  O12  1  0.599  0.134  0.134  1.0
  O  O13  1  0.134  0.134  0.599  1.0
[/CIF]
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