The compound described by Mg(SnO2)4 crystallizes in the monoclinic Cm space group. Mg(1) is bonded in a 2-coordinate geometry to two equivalent O(6) 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 a mixture of edge and corner-sharing SnO6 octahedra. The corner-sharing octahedral tilt angles range from 50-53°. In the second Sn site, Sn(2) is bonded to one O(4), one O(8), two equivalent O(3), and two equivalent O(6) atoms to form a mixture of edge and corner-sharing SnO6 octahedra. The corner-sharing octahedral tilt angles range from 50-53°. 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 a mixture of edge and corner-sharing SnO6 octahedra. The corner-sharing octahedral tilt angles range from 51-53°. 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 a mixture of edge and corner-sharing SnO6 octahedra. The corner-sharing octahedral tilt angles range from 51-53°. 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 trigonal planar geometry to one Sn(1) and two equivalent Sn(3) atoms. In the third O site, O(3) is bonded in a trigonal planar geometry to one Sn(4) and two equivalent Sn(2) atoms. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Sn(2) and two equivalent Sn(1) atoms. 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 to two equivalent Mg(1), one Sn(3), and two equivalent Sn(2) atoms to form distorted edge-sharing OMg2Sn3 square pyramids. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Sn(1) and two equivalent Sn(4) atoms. 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 CIF card [CIF]
data_Mg(SnO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.732
_cell_length_b   7.732
_cell_length_c   10.335
_cell_angle_alpha   50.142
_cell_angle_beta   50.142
_cell_angle_gamma   24.219
_symmetry_Int_Tables_number   1
_cell_volume   191.418
_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  0.568  0.568  0.928  1.0
  Sn  Sn1  1  0.370  0.370  0.438  1.0
  Sn  Sn2  1  0.856  0.856  0.785  1.0
  Sn  Sn3  1  0.172  0.172  0.154  1.0
  Sn  Sn4  1  0.655  0.655  0.501  1.0
  O  O5  1  0.148  0.148  0.377  1.0
  O  O6  1  0.553  0.553  0.231  1.0
  O  O7  1  0.471  0.471  0.704  1.0
  O  O8  1  0.875  0.875  0.565  1.0
  O  O9  1  0.843  0.843  0.335  1.0
  O  O10  1  0.226  0.226  0.896  1.0
  O  O11  1  0.179  0.179  0.615  1.0
  O  O12  1  0.791  0.791  0.041  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 2-coordinate geometry to two equivalent O(6) 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 a mixture of edge and corner-sharing SnO6 octahedra. The corner-sharing octahedral tilt angles range from 50-53°. In the second Sn site, Sn(2) is bonded to one O(4), one O(8), two equivalent O(3), and two equivalent O(6) atoms to form a mixture of edge and corner-sharing SnO6 octahedra. The corner-sharing octahedral tilt angles range from 50-53°. 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 a mixture of edge and corner-sharing SnO6 octahedra. The corner-sharing octahedral tilt angles range from 51-53°. 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 a mixture of edge and corner-sharing SnO6 octahedra. The corner-sharing octahedral tilt angles range from 51-53°. 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 trigonal planar geometry to one Sn(1) and two equivalent Sn(3) atoms. In the third O site, O(3) is bonded in a trigonal planar geometry to one Sn(4) and two equivalent Sn(2) atoms. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Sn(2) and two equivalent Sn(1) atoms. 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 to two equivalent Mg(1), one Sn(3), and two equivalent Sn(2) atoms to form distorted edge-sharing OMg2Sn3 square pyramids. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Sn(1) and two equivalent Sn(4) atoms. 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 CIF card [CIF]
data_Mg(SnO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.732
_cell_length_b   7.732
_cell_length_c   10.335
_cell_angle_alpha   50.142
_cell_angle_beta   50.142
_cell_angle_gamma   24.219
_symmetry_Int_Tables_number   1
_cell_volume   191.418
_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  0.568  0.568  0.928  1.0
  Sn  Sn1  1  0.370  0.370  0.438  1.0
  Sn  Sn2  1  0.856  0.856  0.785  1.0
  Sn  Sn3  1  0.172  0.172  0.154  1.0
  Sn  Sn4  1  0.655  0.655  0.501  1.0
  O  O5  1  0.148  0.148  0.377  1.0
  O  O6  1  0.553  0.553  0.231  1.0
  O  O7  1  0.471  0.471  0.704  1.0
  O  O8  1  0.875  0.875  0.565  1.0
  O  O9  1  0.843  0.843  0.335  1.0
  O  O10  1  0.226  0.226  0.896  1.0
  O  O11  1  0.179  0.179  0.615  1.0
  O  O12  1  0.791  0.791  0.041  1.0
[/CIF]
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