The material described by Mg(PtO2)3 crystallizes in the orthorhombic Cmmm space group. Mg(1) is bonded in a body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form a mixture of distorted corner and edge-sharing PtO6 octahedra. The corner-sharing octahedral tilt angles are 59°. In the second Pt site, Pt(2) is bonded in a square co-planar geometry to four equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Pt(2), and two equivalent Pt(1) atoms to form OMgPt3 tetrahedra that share corners with four equivalent O(2)Mg2Pt2 tetrahedra, corners with eight equivalent O(1)MgPt3 tetrahedra, edges with two equivalent O(2)Mg2Pt2 tetrahedra, and edges with two equivalent O(1)MgPt3 tetrahedra. In the second O site, O(2) is bonded to two equivalent Mg(1) and two equivalent Pt(1) atoms to form OMg2Pt2 tetrahedra that share corners with six equivalent O(2)Mg2Pt2 tetrahedra, corners with eight equivalent O(1)MgPt3 tetrahedra,  an edgeedge with one O(2)Mg2Pt2 tetrahedra, and edges with four equivalent O(1)MgPt3 tetrahedra. is represented by the CIF file [CIF]
data_Mg(PtO2)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.194
_cell_length_b   6.103
_cell_length_c   6.103
_cell_angle_alpha   108.812
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   112.632
_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  0.000  0.500  0.500  1.0
  Pt  Pt1  1  0.500  0.500  0.000  1.0
  Pt  Pt2  1  0.000  0.000  0.000  1.0
  Pt  Pt3  1  0.500  0.000  0.500  1.0
  O  O4  1  0.000  0.914  0.660  1.0
  O  O5  1  0.000  0.086  0.340  1.0
  O  O6  1  0.000  0.660  0.914  1.0
  O  O7  1  0.000  0.340  0.086  1.0
  O  O8  1  0.500  0.352  0.648  1.0
  O  O9  1  0.500  0.648  0.352  1.0
[/CIF]
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The material described by Mg(PtO2)3 crystallizes in the orthorhombic Cmmm space group. Mg(1) is bonded in a body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form a mixture of distorted corner and edge-sharing PtO6 octahedra. The corner-sharing octahedral tilt angles are 59°. In the second Pt site, Pt(2) is bonded in a square co-planar geometry to four equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Pt(2), and two equivalent Pt(1) atoms to form OMgPt3 tetrahedra that share corners with four equivalent O(2)Mg2Pt2 tetrahedra, corners with eight equivalent O(1)MgPt3 tetrahedra, edges with two equivalent O(2)Mg2Pt2 tetrahedra, and edges with two equivalent O(1)MgPt3 tetrahedra. In the second O site, O(2) is bonded to two equivalent Mg(1) and two equivalent Pt(1) atoms to form OMg2Pt2 tetrahedra that share corners with six equivalent O(2)Mg2Pt2 tetrahedra, corners with eight equivalent O(1)MgPt3 tetrahedra,  an edgeedge with one O(2)Mg2Pt2 tetrahedra, and edges with four equivalent O(1)MgPt3 tetrahedra. is represented by the CIF file [CIF]
data_Mg(PtO2)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.194
_cell_length_b   6.103
_cell_length_c   6.103
_cell_angle_alpha   108.812
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   112.632
_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  0.000  0.500  0.500  1.0
  Pt  Pt1  1  0.500  0.500  0.000  1.0
  Pt  Pt2  1  0.000  0.000  0.000  1.0
  Pt  Pt3  1  0.500  0.000  0.500  1.0
  O  O4  1  0.000  0.914  0.660  1.0
  O  O5  1  0.000  0.086  0.340  1.0
  O  O6  1  0.000  0.660  0.914  1.0
  O  O7  1  0.000  0.340  0.086  1.0
  O  O8  1  0.500  0.352  0.648  1.0
  O  O9  1  0.500  0.648  0.352  1.0
[/CIF]
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