The crystal structure described by Sr3Ag2 crystallizes in the trigonal R-3 space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 5-coordinate geometry to five equivalent Ag(1) atoms. In the second Sr site, Sr(2) is bonded in an octahedral geometry to six equivalent Ag(1) atoms. In the third Sr site, Sr(3) is bonded in a 6-coordinate geometry to six equivalent Ag(1) atoms. Ag(1) is bonded in a 9-coordinate geometry to one Sr(2), two equivalent Sr(3), five equivalent Sr(1), and one Ag(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr3Ag2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.481
_cell_length_b   8.481
_cell_length_c   8.481
_cell_angle_alpha   72.154
_cell_angle_beta   72.154
_cell_angle_gamma   72.154
_symmetry_Int_Tables_number   1
_cell_volume   537.209
_cell_formula_units_Z   3
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
  Sr  Sr0  1  0.166  0.888  0.663  1.0
  Sr  Sr1  1  0.888  0.663  0.166  1.0
  Sr  Sr2  1  0.663  0.166  0.888  1.0
  Sr  Sr3  1  0.834  0.112  0.337  1.0
  Sr  Sr4  1  0.112  0.337  0.834  1.0
  Sr  Sr5  1  0.337  0.834  0.112  1.0
  Sr  Sr6  1  0.500  0.500  0.500  1.0
  Sr  Sr7  1  0.295  0.295  0.295  1.0
  Sr  Sr8  1  0.705  0.705  0.705  1.0
  Ag  Ag9  1  0.540  0.913  0.361  1.0
  Ag  Ag10  1  0.913  0.361  0.540  1.0
  Ag  Ag11  1  0.361  0.540  0.913  1.0
  Ag  Ag12  1  0.460  0.087  0.639  1.0
  Ag  Ag13  1  0.087  0.639  0.460  1.0
  Ag  Ag14  1  0.639  0.460  0.087  1.0
[/CIF]
.
The crystal structure described by Sr3Ag2 crystallizes in the trigonal R-3 space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 5-coordinate geometry to five equivalent Ag(1) atoms. In the second Sr site, Sr(2) is bonded in an octahedral geometry to six equivalent Ag(1) atoms. In the third Sr site, Sr(3) is bonded in a 6-coordinate geometry to six equivalent Ag(1) atoms. Ag(1) is bonded in a 9-coordinate geometry to one Sr(2), two equivalent Sr(3), five equivalent Sr(1), and one Ag(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr3Ag2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.481
_cell_length_b   8.481
_cell_length_c   8.481
_cell_angle_alpha   72.154
_cell_angle_beta   72.154
_cell_angle_gamma   72.154
_symmetry_Int_Tables_number   1
_cell_volume   537.209
_cell_formula_units_Z   3
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
  Sr  Sr0  1  0.166  0.888  0.663  1.0
  Sr  Sr1  1  0.888  0.663  0.166  1.0
  Sr  Sr2  1  0.663  0.166  0.888  1.0
  Sr  Sr3  1  0.834  0.112  0.337  1.0
  Sr  Sr4  1  0.112  0.337  0.834  1.0
  Sr  Sr5  1  0.337  0.834  0.112  1.0
  Sr  Sr6  1  0.500  0.500  0.500  1.0
  Sr  Sr7  1  0.295  0.295  0.295  1.0
  Sr  Sr8  1  0.705  0.705  0.705  1.0
  Ag  Ag9  1  0.540  0.913  0.361  1.0
  Ag  Ag10  1  0.913  0.361  0.540  1.0
  Ag  Ag11  1  0.361  0.540  0.913  1.0
  Ag  Ag12  1  0.460  0.087  0.639  1.0
  Ag  Ag13  1  0.087  0.639  0.460  1.0
  Ag  Ag14  1  0.639  0.460  0.087  1.0
[/CIF]
.