The crystal structure described by MgSi2(AgO)8 crystallizes in the monoclinic P2 space group. Mg(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(4) atoms. There are four inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 3-coordinate geometry to one O(2), one O(3), and one O(4) atom. In the second Ag site, Ag(2) is bonded in a 3-coordinate geometry to one O(1) and two equivalent O(2) atoms. In the third Ag site, Ag(3) is bonded in a 3-coordinate geometry to one O(1), one O(2), and one O(3) atom. In the fourth Ag site, Ag(4) is bonded in a 3-coordinate geometry to one O(3) and two equivalent O(4) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a tetrahedral geometry to two equivalent O(2) and two equivalent O(4) atoms. In the second Si site, Si(2) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(3) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Mg(1), one Ag(2), one Ag(3), and one Si(2) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Ag(1), one Ag(3), two equivalent Ag(2), and one Si(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Ag(1), one Ag(3), one Ag(4), and one Si(2) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Mg(1), one Ag(1), two equivalent Ag(4), and one Si(1) atom. is represented by the CIF file [CIF]
data_MgSi2(AgO)8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.214
_cell_length_b   6.553
_cell_length_c   6.729
_cell_angle_alpha   95.024
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   272.965
_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  0.485  0.250  0.750  1.0
  Si  Si1  1  0.655  0.250  0.250  1.0
  Si  Si2  1  0.332  0.750  0.750  1.0
  Ag  Ag3  1  0.078  0.096  0.497  1.0
  Ag  Ag4  1  0.707  0.678  0.032  1.0
  Ag  Ag5  1  0.707  0.822  0.468  1.0
  Ag  Ag6  1  0.905  0.459  0.642  1.0
  Ag  Ag7  1  0.905  0.041  0.858  1.0
  Ag  Ag8  1  0.339  0.546  0.321  1.0
  Ag  Ag9  1  0.078  0.404  0.003  1.0
  Ag  Ag10  1  0.339  0.954  0.179  1.0
  O  O11  1  0.493  0.550  0.738  1.0
  O  O12  1  0.808  0.457  0.303  1.0
  O  O13  1  0.169  0.758  0.949  1.0
  O  O14  1  0.490  0.302  0.064  1.0
  O  O15  1  0.808  0.043  0.197  1.0
  O  O16  1  0.493  0.950  0.762  1.0
  O  O17  1  0.169  0.742  0.551  1.0
  O  O18  1  0.490  0.198  0.436  1.0
[/CIF]
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The crystal structure described by MgSi2(AgO)8 crystallizes in the monoclinic P2 space group. Mg(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(4) atoms. There are four inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 3-coordinate geometry to one O(2), one O(3), and one O(4) atom. In the second Ag site, Ag(2) is bonded in a 3-coordinate geometry to one O(1) and two equivalent O(2) atoms. In the third Ag site, Ag(3) is bonded in a 3-coordinate geometry to one O(1), one O(2), and one O(3) atom. In the fourth Ag site, Ag(4) is bonded in a 3-coordinate geometry to one O(3) and two equivalent O(4) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a tetrahedral geometry to two equivalent O(2) and two equivalent O(4) atoms. In the second Si site, Si(2) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(3) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Mg(1), one Ag(2), one Ag(3), and one Si(2) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Ag(1), one Ag(3), two equivalent Ag(2), and one Si(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Ag(1), one Ag(3), one Ag(4), and one Si(2) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Mg(1), one Ag(1), two equivalent Ag(4), and one Si(1) atom. is represented by the CIF file [CIF]
data_MgSi2(AgO)8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.214
_cell_length_b   6.553
_cell_length_c   6.729
_cell_angle_alpha   95.024
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   272.965
_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  0.485  0.250  0.750  1.0
  Si  Si1  1  0.655  0.250  0.250  1.0
  Si  Si2  1  0.332  0.750  0.750  1.0
  Ag  Ag3  1  0.078  0.096  0.497  1.0
  Ag  Ag4  1  0.707  0.678  0.032  1.0
  Ag  Ag5  1  0.707  0.822  0.468  1.0
  Ag  Ag6  1  0.905  0.459  0.642  1.0
  Ag  Ag7  1  0.905  0.041  0.858  1.0
  Ag  Ag8  1  0.339  0.546  0.321  1.0
  Ag  Ag9  1  0.078  0.404  0.003  1.0
  Ag  Ag10  1  0.339  0.954  0.179  1.0
  O  O11  1  0.493  0.550  0.738  1.0
  O  O12  1  0.808  0.457  0.303  1.0
  O  O13  1  0.169  0.758  0.949  1.0
  O  O14  1  0.490  0.302  0.064  1.0
  O  O15  1  0.808  0.043  0.197  1.0
  O  O16  1  0.493  0.950  0.762  1.0
  O  O17  1  0.169  0.742  0.551  1.0
  O  O18  1  0.490  0.198  0.436  1.0
[/CIF]
.