The material structure described by MgAg2(HgO2)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(3), and two equivalent O(4) atoms to form distorted corner-sharing MgO4 tetrahedra. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a linear geometry to one O(1) and one O(2) atom. In the second Ag site, Ag(2) is bonded in a linear geometry to one O(3) and one O(4) atom. There are two inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a distorted T-shaped geometry to one O(2) and two equivalent O(3) atoms. In the second Hg site, Hg(2) is bonded in a 2-coordinate geometry to one O(2) and two equivalent O(1) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Mg(1), one Ag(1), and two equivalent Hg(2) atoms. In the second O site, O(2) is bonded in a trigonal non-coplanar geometry to one Ag(1), one Hg(1), and one Hg(2) atom. In the third O site, O(3) is bonded to one Mg(1), one Ag(2), and two equivalent Hg(1) atoms to form distorted corner-sharing OMgAgHg2 tetrahedra. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Mg(1) and one Ag(2) atom. is represented by the CIF file [CIF]
data_MgAg2(HgO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.668
_cell_length_b   9.634
_cell_length_c   5.518
_cell_angle_alpha   122.759
_cell_angle_beta   81.347
_cell_angle_gamma   85.677
_symmetry_Int_Tables_number   1
_cell_volume   159.200
_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  0.242  0.345  0.361  1.0
  Ag  Ag1  1  0.478  0.984  0.477  1.0
  Ag  Ag2  1  0.925  0.467  0.013  1.0
  Hg  Hg3  1  0.507  0.686  0.699  1.0
  Hg  Hg4  1  0.946  0.020  0.006  1.0
  O  O5  1  0.260  0.130  0.334  1.0
  O  O6  1  0.780  0.848  0.609  1.0
  O  O7  1  0.087  0.563  0.756  1.0
  O  O8  1  0.775  0.340  0.210  1.0
[/CIF]
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The material structure described by MgAg2(HgO2)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(3), and two equivalent O(4) atoms to form distorted corner-sharing MgO4 tetrahedra. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a linear geometry to one O(1) and one O(2) atom. In the second Ag site, Ag(2) is bonded in a linear geometry to one O(3) and one O(4) atom. There are two inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a distorted T-shaped geometry to one O(2) and two equivalent O(3) atoms. In the second Hg site, Hg(2) is bonded in a 2-coordinate geometry to one O(2) and two equivalent O(1) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Mg(1), one Ag(1), and two equivalent Hg(2) atoms. In the second O site, O(2) is bonded in a trigonal non-coplanar geometry to one Ag(1), one Hg(1), and one Hg(2) atom. In the third O site, O(3) is bonded to one Mg(1), one Ag(2), and two equivalent Hg(1) atoms to form distorted corner-sharing OMgAgHg2 tetrahedra. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Mg(1) and one Ag(2) atom. is represented by the CIF file [CIF]
data_MgAg2(HgO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.668
_cell_length_b   9.634
_cell_length_c   5.518
_cell_angle_alpha   122.759
_cell_angle_beta   81.347
_cell_angle_gamma   85.677
_symmetry_Int_Tables_number   1
_cell_volume   159.200
_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  0.242  0.345  0.361  1.0
  Ag  Ag1  1  0.478  0.984  0.477  1.0
  Ag  Ag2  1  0.925  0.467  0.013  1.0
  Hg  Hg3  1  0.507  0.686  0.699  1.0
  Hg  Hg4  1  0.946  0.020  0.006  1.0
  O  O5  1  0.260  0.130  0.334  1.0
  O  O6  1  0.780  0.848  0.609  1.0
  O  O7  1  0.087  0.563  0.756  1.0
  O  O8  1  0.775  0.340  0.210  1.0
[/CIF]
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