The crystal structure described by Zn3Si4(AgO7)2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a distorted square co-planar geometry to two equivalent O(2) and two equivalent O(3) atoms. In the second Ag site, Ag(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form distorted AgO6 octahedra that share corners with two equivalent Zn(1)O5 square pyramids, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Zn(2)O4 trigonal pyramids, and edges with two equivalent Zn(1)O5 square pyramids. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(1), one O(2), one O(4), and two equivalent O(7) atoms to form distorted ZnO5 square pyramids that share  a cornercorner with one Ag(2)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with three equivalent Si(1)O4 tetrahedra,  a cornercorner with one Zn(2)O4 trigonal pyramid,  an edgeedge with one Ag(2)O6 octahedra, and  an edgeedge with one Zn(1)O5 square pyramid. The corner-sharing octahedral tilt angles are 41°. In the second Zn site, Zn(2) is bonded to two equivalent O(1) and two equivalent O(3) atoms to form ZnO4 trigonal pyramids that share corners with two equivalent Ag(2)O6 octahedra, corners with two equivalent Zn(1)O5 square pyramids, and corners with four equivalent Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 66°. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Ag(2)O6 octahedra, corners with three equivalent Zn(1)O5 square pyramids, and corners with two equivalent Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 59°. In the second Si site, Si(2) is bonded to one O(1), one O(3), one O(5), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Ag(2)O6 octahedra,  a cornercorner with one Zn(1)O5 square pyramid, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Zn(2)O4 trigonal pyramids. The corner-sharing octahedral tilt angles are 74°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Ag(2), one Zn(1), one Zn(2), and one Si(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Ag(1), one Ag(2), and one Zn(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Ag(1), one Zn(2), and one Si(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ag(2), one Zn(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Si(1) and one Si(2) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Si(1) and one Si(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to two equivalent Zn(1) and one Si(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Zn3Si4(AgO7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.717
_cell_length_b   9.717
_cell_length_c   10.309
_cell_angle_alpha   58.389
_cell_angle_beta   58.389
_cell_angle_gamma   46.745
_symmetry_Int_Tables_number   1
_cell_volume   581.974
_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
  Zn  Zn0  1  0.052  0.276  0.126  1.0
  Zn  Zn1  1  0.724  0.948  0.374  1.0
  Zn  Zn2  1  0.276  0.052  0.626  1.0
  Zn  Zn3  1  0.383  0.617  0.750  1.0
  Zn  Zn4  1  0.948  0.724  0.874  1.0
  Zn  Zn5  1  0.617  0.383  0.250  1.0
  Si  Si6  1  0.574  0.042  0.706  1.0
  Si  Si7  1  0.042  0.574  0.206  1.0
  Si  Si8  1  0.486  0.279  0.109  1.0
  Si  Si9  1  0.279  0.486  0.609  1.0
  Si  Si10  1  0.958  0.426  0.794  1.0
  Si  Si11  1  0.514  0.721  0.891  1.0
  Si  Si12  1  0.721  0.514  0.391  1.0
  Si  Si13  1  0.426  0.958  0.294  1.0
  Ag  Ag14  1  0.776  0.224  0.750  1.0
  Ag  Ag15  1  0.224  0.776  0.250  1.0
  Ag  Ag16  1  0.000  0.000  0.000  1.0
  Ag  Ag17  1  0.000  0.000  0.500  1.0
  O  O18  1  0.797  0.354  0.313  1.0
  O  O19  1  0.964  0.898  0.404  1.0
  O  O20  1  0.475  0.622  0.083  1.0
  O  O21  1  0.898  0.964  0.904  1.0
  O  O22  1  0.205  0.057  0.290  1.0
  O  O23  1  0.089  0.499  0.631  1.0
  O  O24  1  0.622  0.475  0.583  1.0
  O  O25  1  0.943  0.795  0.210  1.0
  O  O26  1  0.911  0.501  0.369  1.0
  O  O27  1  0.570  0.728  0.290  1.0
  O  O28  1  0.036  0.102  0.596  1.0
  O  O29  1  0.795  0.943  0.710  1.0
  O  O30  1  0.501  0.911  0.869  1.0
  O  O31  1  0.354  0.797  0.813  1.0
  O  O32  1  0.728  0.570  0.790  1.0
  O  O33  1  0.057  0.205  0.790  1.0
  O  O34  1  0.958  0.448  0.939  1.0
  O  O35  1  0.430  0.272  0.710  1.0
  O  O36  1  0.552  0.042  0.561  1.0
  O  O37  1  0.272  0.430  0.210  1.0
  O  O38  1  0.499  0.089  0.131  1.0
  O  O39  1  0.102  0.036  0.096  1.0
  O  O40  1  0.448  0.958  0.439  1.0
  O  O41  1  0.525  0.378  0.917  1.0
  O  O42  1  0.042  0.552  0.061  1.0
  O  O43  1  0.378  0.525  0.417  1.0
  O  O44  1  0.646  0.203  0.187  1.0
  O  O45  1  0.203  0.646  0.687  1.0
[/CIF]
.
The crystal structure described by Zn3Si4(AgO7)2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a distorted square co-planar geometry to two equivalent O(2) and two equivalent O(3) atoms. In the second Ag site, Ag(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form distorted AgO6 octahedra that share corners with two equivalent Zn(1)O5 square pyramids, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Zn(2)O4 trigonal pyramids, and edges with two equivalent Zn(1)O5 square pyramids. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(1), one O(2), one O(4), and two equivalent O(7) atoms to form distorted ZnO5 square pyramids that share  a cornercorner with one Ag(2)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with three equivalent Si(1)O4 tetrahedra,  a cornercorner with one Zn(2)O4 trigonal pyramid,  an edgeedge with one Ag(2)O6 octahedra, and  an edgeedge with one Zn(1)O5 square pyramid. The corner-sharing octahedral tilt angles are 41°. In the second Zn site, Zn(2) is bonded to two equivalent O(1) and two equivalent O(3) atoms to form ZnO4 trigonal pyramids that share corners with two equivalent Ag(2)O6 octahedra, corners with two equivalent Zn(1)O5 square pyramids, and corners with four equivalent Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 66°. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Ag(2)O6 octahedra, corners with three equivalent Zn(1)O5 square pyramids, and corners with two equivalent Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 59°. In the second Si site, Si(2) is bonded to one O(1), one O(3), one O(5), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Ag(2)O6 octahedra,  a cornercorner with one Zn(1)O5 square pyramid, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Zn(2)O4 trigonal pyramids. The corner-sharing octahedral tilt angles are 74°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Ag(2), one Zn(1), one Zn(2), and one Si(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Ag(1), one Ag(2), and one Zn(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Ag(1), one Zn(2), and one Si(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ag(2), one Zn(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Si(1) and one Si(2) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Si(1) and one Si(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to two equivalent Zn(1) and one Si(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Zn3Si4(AgO7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.717
_cell_length_b   9.717
_cell_length_c   10.309
_cell_angle_alpha   58.389
_cell_angle_beta   58.389
_cell_angle_gamma   46.745
_symmetry_Int_Tables_number   1
_cell_volume   581.974
_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
  Zn  Zn0  1  0.052  0.276  0.126  1.0
  Zn  Zn1  1  0.724  0.948  0.374  1.0
  Zn  Zn2  1  0.276  0.052  0.626  1.0
  Zn  Zn3  1  0.383  0.617  0.750  1.0
  Zn  Zn4  1  0.948  0.724  0.874  1.0
  Zn  Zn5  1  0.617  0.383  0.250  1.0
  Si  Si6  1  0.574  0.042  0.706  1.0
  Si  Si7  1  0.042  0.574  0.206  1.0
  Si  Si8  1  0.486  0.279  0.109  1.0
  Si  Si9  1  0.279  0.486  0.609  1.0
  Si  Si10  1  0.958  0.426  0.794  1.0
  Si  Si11  1  0.514  0.721  0.891  1.0
  Si  Si12  1  0.721  0.514  0.391  1.0
  Si  Si13  1  0.426  0.958  0.294  1.0
  Ag  Ag14  1  0.776  0.224  0.750  1.0
  Ag  Ag15  1  0.224  0.776  0.250  1.0
  Ag  Ag16  1  0.000  0.000  0.000  1.0
  Ag  Ag17  1  0.000  0.000  0.500  1.0
  O  O18  1  0.797  0.354  0.313  1.0
  O  O19  1  0.964  0.898  0.404  1.0
  O  O20  1  0.475  0.622  0.083  1.0
  O  O21  1  0.898  0.964  0.904  1.0
  O  O22  1  0.205  0.057  0.290  1.0
  O  O23  1  0.089  0.499  0.631  1.0
  O  O24  1  0.622  0.475  0.583  1.0
  O  O25  1  0.943  0.795  0.210  1.0
  O  O26  1  0.911  0.501  0.369  1.0
  O  O27  1  0.570  0.728  0.290  1.0
  O  O28  1  0.036  0.102  0.596  1.0
  O  O29  1  0.795  0.943  0.710  1.0
  O  O30  1  0.501  0.911  0.869  1.0
  O  O31  1  0.354  0.797  0.813  1.0
  O  O32  1  0.728  0.570  0.790  1.0
  O  O33  1  0.057  0.205  0.790  1.0
  O  O34  1  0.958  0.448  0.939  1.0
  O  O35  1  0.430  0.272  0.710  1.0
  O  O36  1  0.552  0.042  0.561  1.0
  O  O37  1  0.272  0.430  0.210  1.0
  O  O38  1  0.499  0.089  0.131  1.0
  O  O39  1  0.102  0.036  0.096  1.0
  O  O40  1  0.448  0.958  0.439  1.0
  O  O41  1  0.525  0.378  0.917  1.0
  O  O42  1  0.042  0.552  0.061  1.0
  O  O43  1  0.378  0.525  0.417  1.0
  O  O44  1  0.646  0.203  0.187  1.0
  O  O45  1  0.203  0.646  0.687  1.0
[/CIF]
.