The compound described by Mg(AgO2)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 Ag(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-61°. 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 Ag(1)O4 tetrahedra, and edges with six equivalent Ag(2)O6 octahedra. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to one O(2) and three equivalent O(1) atoms to form AgO4 tetrahedra that share corners with three equivalent Mg(2)O6 octahedra and corners with nine equivalent Ag(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 58-62°. In the second Ag site, Ag(2) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(4) atoms to form AgO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra, corners with three equivalent Ag(1)O4 tetrahedra, edges with two equivalent Mg(2)O6 octahedra, and edges with four equivalent Ag(2)O6 octahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Mg(2), one Ag(1), and two equivalent Ag(2) atoms to form distorted OMgAg3 tetrahedra that share corners with two equivalent O(1)MgAg3 tetrahedra,  a cornercorner with one O(2)Ag4 trigonal pyramid, edges with two equivalent O(1)MgAg3 tetrahedra, and  an edgeedge with one O(2)Ag4 trigonal pyramid. In the second O site, O(2) is bonded to one Ag(1) and three equivalent Ag(2) atoms to form a mixture of distorted edge and corner-sharing OAg4 trigonal pyramids. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Mg(1) and three equivalent Ag(2) atoms. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mg(2), and two equivalent Ag(2) atoms. is represented by the CIF card [CIF]
data_Mg(AgO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.275
_cell_length_b   6.275
_cell_length_c   6.275
_cell_angle_alpha   61.815
_cell_angle_beta   61.815
_cell_angle_gamma   61.815
_symmetry_Int_Tables_number   1
_cell_volume   181.846
_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  0.990  0.990  0.990  1.0
  Mg  Mg1  1  0.373  0.373  0.373  1.0
  Ag  Ag2  1  0.757  0.757  0.757  1.0
  Ag  Ag3  1  0.878  0.373  0.373  1.0
  Ag  Ag4  1  0.373  0.373  0.878  1.0
  Ag  Ag5  1  0.373  0.878  0.373  1.0
  O  O6  1  0.611  0.176  0.611  1.0
  O  O7  1  0.611  0.611  0.176  1.0
  O  O8  1  0.176  0.611  0.611  1.0
  O  O9  1  0.619  0.619  0.619  1.0
  O  O10  1  0.122  0.122  0.122  1.0
  O  O11  1  0.594  0.137  0.137  1.0
  O  O12  1  0.137  0.137  0.594  1.0
  O  O13  1  0.137  0.594  0.137  1.0
[/CIF]
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The compound described by Mg(AgO2)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 Ag(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-61°. 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 Ag(1)O4 tetrahedra, and edges with six equivalent Ag(2)O6 octahedra. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to one O(2) and three equivalent O(1) atoms to form AgO4 tetrahedra that share corners with three equivalent Mg(2)O6 octahedra and corners with nine equivalent Ag(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 58-62°. In the second Ag site, Ag(2) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(4) atoms to form AgO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra, corners with three equivalent Ag(1)O4 tetrahedra, edges with two equivalent Mg(2)O6 octahedra, and edges with four equivalent Ag(2)O6 octahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Mg(2), one Ag(1), and two equivalent Ag(2) atoms to form distorted OMgAg3 tetrahedra that share corners with two equivalent O(1)MgAg3 tetrahedra,  a cornercorner with one O(2)Ag4 trigonal pyramid, edges with two equivalent O(1)MgAg3 tetrahedra, and  an edgeedge with one O(2)Ag4 trigonal pyramid. In the second O site, O(2) is bonded to one Ag(1) and three equivalent Ag(2) atoms to form a mixture of distorted edge and corner-sharing OAg4 trigonal pyramids. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Mg(1) and three equivalent Ag(2) atoms. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mg(2), and two equivalent Ag(2) atoms. is represented by the CIF card [CIF]
data_Mg(AgO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.275
_cell_length_b   6.275
_cell_length_c   6.275
_cell_angle_alpha   61.815
_cell_angle_beta   61.815
_cell_angle_gamma   61.815
_symmetry_Int_Tables_number   1
_cell_volume   181.846
_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  0.990  0.990  0.990  1.0
  Mg  Mg1  1  0.373  0.373  0.373  1.0
  Ag  Ag2  1  0.757  0.757  0.757  1.0
  Ag  Ag3  1  0.878  0.373  0.373  1.0
  Ag  Ag4  1  0.373  0.373  0.878  1.0
  Ag  Ag5  1  0.373  0.878  0.373  1.0
  O  O6  1  0.611  0.176  0.611  1.0
  O  O7  1  0.611  0.611  0.176  1.0
  O  O8  1  0.176  0.611  0.611  1.0
  O  O9  1  0.619  0.619  0.619  1.0
  O  O10  1  0.122  0.122  0.122  1.0
  O  O11  1  0.594  0.137  0.137  1.0
  O  O12  1  0.137  0.137  0.594  1.0
  O  O13  1  0.137  0.594  0.137  1.0
[/CIF]
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