The material structure described by Ag6Si2O7 crystallizes in the monoclinic P2/c space group. There are three inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(4), and two equivalent O(3) atoms. In the second Ag site, Ag(2) is bonded in a 3-coordinate geometry to one O(1) and two equivalent O(4) atoms. In the third Ag site, Ag(3) is bonded in a distorted T-shaped geometry to one O(1), one O(3), and one O(4) atom. Si(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form corner-sharing SiO4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Ag(1), one Ag(2), one Ag(3), and one Si(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to two equivalent Si(1) atoms. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Ag(3), two equivalent Ag(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Ag(1), one Ag(3), two equivalent Ag(2), and one Si(1) atom. is represented by the CIF file [CIF]
data_Si2Ag6O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.401
_cell_length_b   8.060
_cell_length_c   10.775
_cell_angle_alpha   65.339
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   426.272
_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
  Si  Si0  1  0.726  0.800  0.361  1.0
  Si  Si1  1  0.274  0.200  0.639  1.0
  Si  Si2  1  0.274  0.800  0.861  1.0
  Si  Si3  1  0.726  0.200  0.139  1.0
  Ag  Ag4  1  0.689  0.688  0.100  1.0
  Ag  Ag5  1  0.311  0.688  0.600  1.0
  Ag  Ag6  1  0.271  0.936  0.107  1.0
  Ag  Ag7  1  0.311  0.312  0.900  1.0
  Ag  Ag8  1  0.765  0.447  0.637  1.0
  Ag  Ag9  1  0.729  0.064  0.893  1.0
  Ag  Ag10  1  0.235  0.553  0.363  1.0
  Ag  Ag11  1  0.235  0.447  0.137  1.0
  Ag  Ag12  1  0.729  0.936  0.607  1.0
  Ag  Ag13  1  0.689  0.312  0.400  1.0
  Ag  Ag14  1  0.765  0.553  0.863  1.0
  Ag  Ag15  1  0.271  0.064  0.393  1.0
  O  O16  1  0.851  0.245  0.988  1.0
  O  O17  1  0.835  0.000  0.250  1.0
  O  O18  1  0.165  0.000  0.750  1.0
  O  O19  1  0.192  0.643  0.810  1.0
  O  O20  1  0.851  0.755  0.512  1.0
  O  O21  1  0.192  0.357  0.690  1.0
  O  O22  1  0.419  0.813  0.369  1.0
  O  O23  1  0.808  0.357  0.190  1.0
  O  O24  1  0.149  0.245  0.488  1.0
  O  O25  1  0.581  0.813  0.869  1.0
  O  O26  1  0.581  0.187  0.631  1.0
  O  O27  1  0.808  0.643  0.310  1.0
  O  O28  1  0.419  0.187  0.131  1.0
  O  O29  1  0.149  0.755  0.012  1.0
[/CIF]
.
The material structure described by Ag6Si2O7 crystallizes in the monoclinic P2/c space group. There are three inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(4), and two equivalent O(3) atoms. In the second Ag site, Ag(2) is bonded in a 3-coordinate geometry to one O(1) and two equivalent O(4) atoms. In the third Ag site, Ag(3) is bonded in a distorted T-shaped geometry to one O(1), one O(3), and one O(4) atom. Si(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form corner-sharing SiO4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Ag(1), one Ag(2), one Ag(3), and one Si(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to two equivalent Si(1) atoms. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Ag(3), two equivalent Ag(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Ag(1), one Ag(3), two equivalent Ag(2), and one Si(1) atom. is represented by the CIF file [CIF]
data_Si2Ag6O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.401
_cell_length_b   8.060
_cell_length_c   10.775
_cell_angle_alpha   65.339
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   426.272
_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
  Si  Si0  1  0.726  0.800  0.361  1.0
  Si  Si1  1  0.274  0.200  0.639  1.0
  Si  Si2  1  0.274  0.800  0.861  1.0
  Si  Si3  1  0.726  0.200  0.139  1.0
  Ag  Ag4  1  0.689  0.688  0.100  1.0
  Ag  Ag5  1  0.311  0.688  0.600  1.0
  Ag  Ag6  1  0.271  0.936  0.107  1.0
  Ag  Ag7  1  0.311  0.312  0.900  1.0
  Ag  Ag8  1  0.765  0.447  0.637  1.0
  Ag  Ag9  1  0.729  0.064  0.893  1.0
  Ag  Ag10  1  0.235  0.553  0.363  1.0
  Ag  Ag11  1  0.235  0.447  0.137  1.0
  Ag  Ag12  1  0.729  0.936  0.607  1.0
  Ag  Ag13  1  0.689  0.312  0.400  1.0
  Ag  Ag14  1  0.765  0.553  0.863  1.0
  Ag  Ag15  1  0.271  0.064  0.393  1.0
  O  O16  1  0.851  0.245  0.988  1.0
  O  O17  1  0.835  0.000  0.250  1.0
  O  O18  1  0.165  0.000  0.750  1.0
  O  O19  1  0.192  0.643  0.810  1.0
  O  O20  1  0.851  0.755  0.512  1.0
  O  O21  1  0.192  0.357  0.690  1.0
  O  O22  1  0.419  0.813  0.369  1.0
  O  O23  1  0.808  0.357  0.190  1.0
  O  O24  1  0.149  0.245  0.488  1.0
  O  O25  1  0.581  0.813  0.869  1.0
  O  O26  1  0.581  0.187  0.631  1.0
  O  O27  1  0.808  0.643  0.310  1.0
  O  O28  1  0.419  0.187  0.131  1.0
  O  O29  1  0.149  0.755  0.012  1.0
[/CIF]
.