The structure described by Ba2AgSi3 is hexagonal omega structure-derived structured and crystallizes in the orthorhombic Fddd space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to four equivalent Ag(1), two equivalent Si(2), and six equivalent Si(1) atoms to form BaSi8Ag4 cuboctahedra that share edges with six equivalent Ba(2)Si10Ag2 cuboctahedra, edges with six equivalent Ba(1)Si8Ag4 cuboctahedra, faces with three equivalent Ba(1)Si8Ag4 cuboctahedra, and faces with five equivalent Ba(2)Si10Ag2 cuboctahedra. In the second Ba site, Ba(2) is bonded to two equivalent Ag(1), four equivalent Si(2), and six equivalent Si(1) atoms to form BaSi10Ag2 cuboctahedra that share edges with six equivalent Ba(2)Si10Ag2 cuboctahedra, edges with six equivalent Ba(1)Si8Ag4 cuboctahedra, faces with three equivalent Ba(2)Si10Ag2 cuboctahedra, and faces with five equivalent Ba(1)Si8Ag4 cuboctahedra. Ag(1) is bonded in a 9-coordinate geometry to two equivalent Ba(2), four equivalent Ba(1), one Si(2), and two equivalent Si(1) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to three equivalent Ba(1), three equivalent Ba(2), one Ag(1), one Si(1), and one Si(2) atom. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Ba(1), four equivalent Ba(2), one Ag(1), and two equivalent Si(1) atoms. is represented by the CIF file [CIF]
data_Ba2Si3Ag
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.480
_cell_length_b   10.886
_cell_length_c   8.626
_cell_angle_alpha   78.590
_cell_angle_beta   58.764
_cell_angle_gamma   42.648
_symmetry_Int_Tables_number   1
_cell_volume   643.836
_cell_formula_units_Z   4
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
  Ba  Ba0  1  0.126  0.126  0.374  1.0
  Ba  Ba1  1  0.876  0.876  0.124  1.0
  Ba  Ba2  1  0.124  0.124  0.876  1.0
  Ba  Ba3  1  0.374  0.374  0.126  1.0
  Ba  Ba4  1  0.624  0.624  0.376  1.0
  Ba  Ba5  1  0.376  0.376  0.625  1.0
  Ba  Ba6  1  0.626  0.626  0.874  1.0
  Ba  Ba7  1  0.874  0.874  0.625  1.0
  Si  Si8  1  0.338  0.657  0.822  1.0
  Si  Si9  1  0.184  0.822  0.657  1.0
  Si  Si10  1  0.822  0.184  0.338  1.0
  Si  Si11  1  0.657  0.338  0.184  1.0
  Si  Si12  1  0.912  0.593  0.428  1.0
  Si  Si13  1  0.066  0.428  0.593  1.0
  Si  Si14  1  0.428  0.066  0.912  1.0
  Si  Si15  1  0.910  0.590  0.910  1.0
  Si  Si16  1  0.660  0.340  0.660  1.0
  Si  Si17  1  0.340  0.660  0.340  1.0
  Si  Si18  1  0.590  0.910  0.590  1.0
  Si  Si19  1  0.593  0.912  0.066  1.0
  Ag  Ag20  1  0.083  0.417  0.083  1.0
  Ag  Ag21  1  0.167  0.833  0.167  1.0
  Ag  Ag22  1  0.417  0.083  0.417  1.0
  Ag  Ag23  1  0.833  0.167  0.833  1.0
[/CIF]
.
The structure described by Ba2AgSi3 is hexagonal omega structure-derived structured and crystallizes in the orthorhombic Fddd space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to four equivalent Ag(1), two equivalent Si(2), and six equivalent Si(1) atoms to form BaSi8Ag4 cuboctahedra that share edges with six equivalent Ba(2)Si10Ag2 cuboctahedra, edges with six equivalent Ba(1)Si8Ag4 cuboctahedra, faces with three equivalent Ba(1)Si8Ag4 cuboctahedra, and faces with five equivalent Ba(2)Si10Ag2 cuboctahedra. In the second Ba site, Ba(2) is bonded to two equivalent Ag(1), four equivalent Si(2), and six equivalent Si(1) atoms to form BaSi10Ag2 cuboctahedra that share edges with six equivalent Ba(2)Si10Ag2 cuboctahedra, edges with six equivalent Ba(1)Si8Ag4 cuboctahedra, faces with three equivalent Ba(2)Si10Ag2 cuboctahedra, and faces with five equivalent Ba(1)Si8Ag4 cuboctahedra. Ag(1) is bonded in a 9-coordinate geometry to two equivalent Ba(2), four equivalent Ba(1), one Si(2), and two equivalent Si(1) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to three equivalent Ba(1), three equivalent Ba(2), one Ag(1), one Si(1), and one Si(2) atom. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Ba(1), four equivalent Ba(2), one Ag(1), and two equivalent Si(1) atoms. is represented by the CIF file [CIF]
data_Ba2Si3Ag
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.480
_cell_length_b   10.886
_cell_length_c   8.626
_cell_angle_alpha   78.590
_cell_angle_beta   58.764
_cell_angle_gamma   42.648
_symmetry_Int_Tables_number   1
_cell_volume   643.836
_cell_formula_units_Z   4
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
  Ba  Ba0  1  0.126  0.126  0.374  1.0
  Ba  Ba1  1  0.876  0.876  0.124  1.0
  Ba  Ba2  1  0.124  0.124  0.876  1.0
  Ba  Ba3  1  0.374  0.374  0.126  1.0
  Ba  Ba4  1  0.624  0.624  0.376  1.0
  Ba  Ba5  1  0.376  0.376  0.625  1.0
  Ba  Ba6  1  0.626  0.626  0.874  1.0
  Ba  Ba7  1  0.874  0.874  0.625  1.0
  Si  Si8  1  0.338  0.657  0.822  1.0
  Si  Si9  1  0.184  0.822  0.657  1.0
  Si  Si10  1  0.822  0.184  0.338  1.0
  Si  Si11  1  0.657  0.338  0.184  1.0
  Si  Si12  1  0.912  0.593  0.428  1.0
  Si  Si13  1  0.066  0.428  0.593  1.0
  Si  Si14  1  0.428  0.066  0.912  1.0
  Si  Si15  1  0.910  0.590  0.910  1.0
  Si  Si16  1  0.660  0.340  0.660  1.0
  Si  Si17  1  0.340  0.660  0.340  1.0
  Si  Si18  1  0.590  0.910  0.590  1.0
  Si  Si19  1  0.593  0.912  0.066  1.0
  Ag  Ag20  1  0.083  0.417  0.083  1.0
  Ag  Ag21  1  0.167  0.833  0.167  1.0
  Ag  Ag22  1  0.417  0.083  0.417  1.0
  Ag  Ag23  1  0.833  0.167  0.833  1.0
[/CIF]
.