The compound described by Mg(SnO2)4 crystallizes in the monoclinic Cm space group. Mg(1) is bonded in a 5-coordinate geometry to one O(4), two equivalent O(6), and two equivalent O(7) atoms. There are four inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(2), one O(7), two equivalent O(4), and two equivalent O(5) atoms to form SnO6 octahedra that share corners with two equivalent Sn(3)O6 octahedra, corners with two equivalent Sn(2)O4 tetrahedra, edges with two equivalent Sn(1)O6 octahedra, and edges with two equivalent Sn(4)O6 octahedra. The corner-sharing octahedral tilt angles are 48°. In the second Sn site, Sn(2) is bonded to one O(4), one O(8), and two equivalent O(3) atoms to form SnO4 tetrahedra that share corners with two equivalent Sn(1)O6 octahedra, corners with two equivalent Sn(3)O6 octahedra, corners with two equivalent Sn(4)O6 octahedra, and corners with two equivalent Sn(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 53-69°. In the third Sn site, Sn(3) is bonded to one O(1), one O(6), two equivalent O(2), and two equivalent O(8) atoms to form SnO6 octahedra that share corners with two equivalent Sn(1)O6 octahedra, corners with two equivalent Sn(4)O6 octahedra, corners with two equivalent Sn(2)O4 tetrahedra, and edges with two equivalent Sn(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-54°. In the fourth Sn site, Sn(4) is bonded to one O(3), one O(5), two equivalent O(1), and two equivalent O(7) atoms to form SnO6 octahedra that share corners with two equivalent Sn(3)O6 octahedra, corners with two equivalent Sn(2)O4 tetrahedra, edges with two equivalent Sn(1)O6 octahedra, and edges with two equivalent Sn(4)O6 octahedra. The corner-sharing octahedral tilt angles are 54°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Sn(3) and two equivalent Sn(4) atoms. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Sn(1) and two equivalent Sn(3) atoms. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Sn(4) and two equivalent Sn(2) atoms. In the fourth O site, O(4) is bonded to one Mg(1), one Sn(2), and two equivalent Sn(1) atoms to form distorted OMgSn3 trigonal pyramids that share corners with two equivalent O(4)MgSn3 trigonal pyramids and edges with two equivalent O(7)Mg2Sn3 square pyramids. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Sn(4) and two equivalent Sn(1) atoms. In the sixth O site, O(6) is bonded in a trigonal planar geometry to two equivalent Mg(1) and one Sn(3) atom. In the seventh O site, O(7) is bonded to two equivalent Mg(1), one Sn(1), and two equivalent Sn(4) atoms to form OMg2Sn3 square pyramids that share edges with two equivalent O(7)Mg2Sn3 square pyramids and edges with two equivalent O(4)MgSn3 trigonal pyramids. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one Sn(2) and two equivalent Sn(3) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mg(SnO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.069
_cell_length_b   8.069
_cell_length_c   9.822
_cell_angle_alpha   53.106
_cell_angle_beta   53.106
_cell_angle_gamma   23.057
_symmetry_Int_Tables_number   1
_cell_volume   197.969
_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  0.690  0.690  0.799  1.0
  Sn  Sn1  1  0.370  0.370  0.429  1.0
  Sn  Sn2  1  0.899  0.899  0.790  1.0
  Sn  Sn3  1  0.149  0.149  0.158  1.0
  Sn  Sn4  1  0.666  0.666  0.491  1.0
  O  O5  1  0.136  0.136  0.395  1.0
  O  O6  1  0.534  0.534  0.265  1.0
  O  O7  1  0.513  0.513  0.719  1.0
  O  O8  1  0.855  0.855  0.581  1.0
  O  O9  1  0.836  0.836  0.327  1.0
  O  O10  1  0.171  0.171  0.930  1.0
  O  O11  1  0.196  0.196  0.613  1.0
  O  O12  1  0.749  0.749  0.094  1.0
[/CIF]
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The compound described by Mg(SnO2)4 crystallizes in the monoclinic Cm space group. Mg(1) is bonded in a 5-coordinate geometry to one O(4), two equivalent O(6), and two equivalent O(7) atoms. There are four inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(2), one O(7), two equivalent O(4), and two equivalent O(5) atoms to form SnO6 octahedra that share corners with two equivalent Sn(3)O6 octahedra, corners with two equivalent Sn(2)O4 tetrahedra, edges with two equivalent Sn(1)O6 octahedra, and edges with two equivalent Sn(4)O6 octahedra. The corner-sharing octahedral tilt angles are 48°. In the second Sn site, Sn(2) is bonded to one O(4), one O(8), and two equivalent O(3) atoms to form SnO4 tetrahedra that share corners with two equivalent Sn(1)O6 octahedra, corners with two equivalent Sn(3)O6 octahedra, corners with two equivalent Sn(4)O6 octahedra, and corners with two equivalent Sn(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 53-69°. In the third Sn site, Sn(3) is bonded to one O(1), one O(6), two equivalent O(2), and two equivalent O(8) atoms to form SnO6 octahedra that share corners with two equivalent Sn(1)O6 octahedra, corners with two equivalent Sn(4)O6 octahedra, corners with two equivalent Sn(2)O4 tetrahedra, and edges with two equivalent Sn(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-54°. In the fourth Sn site, Sn(4) is bonded to one O(3), one O(5), two equivalent O(1), and two equivalent O(7) atoms to form SnO6 octahedra that share corners with two equivalent Sn(3)O6 octahedra, corners with two equivalent Sn(2)O4 tetrahedra, edges with two equivalent Sn(1)O6 octahedra, and edges with two equivalent Sn(4)O6 octahedra. The corner-sharing octahedral tilt angles are 54°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Sn(3) and two equivalent Sn(4) atoms. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Sn(1) and two equivalent Sn(3) atoms. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Sn(4) and two equivalent Sn(2) atoms. In the fourth O site, O(4) is bonded to one Mg(1), one Sn(2), and two equivalent Sn(1) atoms to form distorted OMgSn3 trigonal pyramids that share corners with two equivalent O(4)MgSn3 trigonal pyramids and edges with two equivalent O(7)Mg2Sn3 square pyramids. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Sn(4) and two equivalent Sn(1) atoms. In the sixth O site, O(6) is bonded in a trigonal planar geometry to two equivalent Mg(1) and one Sn(3) atom. In the seventh O site, O(7) is bonded to two equivalent Mg(1), one Sn(1), and two equivalent Sn(4) atoms to form OMg2Sn3 square pyramids that share edges with two equivalent O(7)Mg2Sn3 square pyramids and edges with two equivalent O(4)MgSn3 trigonal pyramids. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one Sn(2) and two equivalent Sn(3) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mg(SnO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.069
_cell_length_b   8.069
_cell_length_c   9.822
_cell_angle_alpha   53.106
_cell_angle_beta   53.106
_cell_angle_gamma   23.057
_symmetry_Int_Tables_number   1
_cell_volume   197.969
_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  0.690  0.690  0.799  1.0
  Sn  Sn1  1  0.370  0.370  0.429  1.0
  Sn  Sn2  1  0.899  0.899  0.790  1.0
  Sn  Sn3  1  0.149  0.149  0.158  1.0
  Sn  Sn4  1  0.666  0.666  0.491  1.0
  O  O5  1  0.136  0.136  0.395  1.0
  O  O6  1  0.534  0.534  0.265  1.0
  O  O7  1  0.513  0.513  0.719  1.0
  O  O8  1  0.855  0.855  0.581  1.0
  O  O9  1  0.836  0.836  0.327  1.0
  O  O10  1  0.171  0.171  0.930  1.0
  O  O11  1  0.196  0.196  0.613  1.0
  O  O12  1  0.749  0.749  0.094  1.0
[/CIF]
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