The compound described by MgO2 is pyrite-like structured and crystallizes in the trigonal R-3m space group. Mg(1) is bonded to six equivalent O(1) atoms to form edge-sharing MgO6 octahedra. O(1) is bonded in a 4-coordinate geometry to three equivalent Mg(1) and one O(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.955
_cell_length_b   3.955
_cell_length_c   3.955
_cell_angle_alpha   47.878
_cell_angle_beta   47.878
_cell_angle_gamma   47.878
_symmetry_Int_Tables_number   1
_cell_volume   31.170
_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  0.000  0.000  1.0
  O  O1  1  0.571  0.571  0.571  1.0
  O  O2  1  0.429  0.429  0.429  1.0
[/CIF]
.
The compound described by MgO2 is pyrite-like structured and crystallizes in the trigonal R-3m space group. Mg(1) is bonded to six equivalent O(1) atoms to form edge-sharing MgO6 octahedra. O(1) is bonded in a 4-coordinate geometry to three equivalent Mg(1) and one O(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.955
_cell_length_b   3.955
_cell_length_c   3.955
_cell_angle_alpha   47.878
_cell_angle_beta   47.878
_cell_angle_gamma   47.878
_symmetry_Int_Tables_number   1
_cell_volume   31.170
_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  0.000  0.000  1.0
  O  O1  1  0.571  0.571  0.571  1.0
  O  O2  1  0.429  0.429  0.429  1.0
[/CIF]
.