data_SrAg2Sn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.08
_cell_length_b   5.08
_cell_length_c   5.08
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrAg2Sn
_chemical_formula_sum   'Sr1 Ag2 Sn1'
_cell_volume   92.77
_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
  Sr  Sr3  1  0.0  0.0  0.0  1.0
  Ag  Ag0  1  0.39  0.39  0.39  1.0
  Ag  Ag1  1  0.8  0.8  0.8  1.0
  Sn  Sn2  1  0.59  0.59  0.59  1.0

data_SrAg2Sn
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.08
_cell_length_b   5.08
_cell_length_c   12.45
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   SrAg2Sn
_chemical_formula_sum   'Sr3 Ag6 Sn3'
_cell_volume   278.32
_cell_formula_units_Z   3
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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  3  0.0  0.0  0.0  1.0
  Ag  Ag1  3  0.0  0.0  0.2  1.0
  Ag  Ag2  3  0.0  0.0  0.61  1.0
  Sn  Sn3  3  0.0  0.0  0.41  1.0

Sr Ag Ag Sn
Sr Ag Ag Sn 0 2 - - - 0 2 - - o 0 2 o - - 0 2 - o - 0 3 - - o 0 3 - o - 0 3 o - - 0 1 - o o 0 1 o - o 0 1 o o - 1 3 o - o 1 3 - o o 1 3 o o - 1 3 o o o 1 2 - o o 1 2 o - o 1 2 o o - 2 3 o o o 
SrAg2Sn crystallizes in the trigonal R3m space group. Sr(1) is bonded in a 10-coordinate geometry to three equivalent Ag(1), four equivalent Ag(2), and three equivalent Sn(1) atoms. All Sr(1)-Ag(1) bond lengths are 3.02 Å. There is one shorter (2.53 Å) and three longer (3.35 Å) Sr(1)-Ag(2) bond lengths. All Sr(1)-Sn(1) bond lengths are 3.07 Å. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to three equivalent Sr(1) and one Sn(1) atom to form distorted corner-sharing AgSr3Sn tetrahedra. The Ag(1)-Sn(1) bond length is 2.53 Å. In the second Ag site, Ag(2) is bonded in a distorted single-bond geometry to four equivalent Sr(1) and one Sn(1) atom. The Ag(2)-Sn(1) bond length is 2.53 Å. Sn(1) is bonded in a 5-coordinate geometry to three equivalent Sr(1), one Ag(1), and one Ag(2) atom.