data_RbSr2Ag
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.07
_cell_length_b   6.07
_cell_length_c   6.07
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   RbSr2Ag
_chemical_formula_sum   'Rb1 Sr2 Ag1'
_cell_volume   158.52
_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
  Rb  Rb1  1  0.0  0.0  0.0  1.0
  Sr  Sr2  1  0.15  0.15  0.15  1.0
  Sr  Sr3  1  0.44  0.44  0.44  1.0
  Ag  Ag0  1  0.3  0.3  0.3  1.0

data_RbSr2Ag
_symmetry_space_group_name_H-M   R3m
_cell_length_a   6.07
_cell_length_b   6.07
_cell_length_c   14.88
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   RbSr2Ag
_chemical_formula_sum   'Rb3 Sr6 Ag3'
_cell_volume   475.57
_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
  Rb  Rb0  3  0.0  0.0  0.0  1.0
  Sr  Sr1  3  0.0  0.0  0.56  1.0
  Sr  Sr2  3  0.0  0.0  0.85  1.0
  Ag  Ag3  3  0.0  0.0  0.7  1.0

Rb Sr Sr Ag
Rb Sr Sr Ag 0 1 o o o 1 3 o o o 2 3 o o o 
RbSr2Ag crystallizes in the trigonal R3m space group. Rb(1) is bonded to one Sr(1) and three equivalent Ag(1) atoms to form distorted corner-sharing RbSrAg3 trigonal pyramids. The Rb(1)-Sr(1) bond length is 2.20 Å. All Rb(1)-Ag(1) bond lengths are 3.55 Å. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a distorted linear geometry to one Rb(1) and one Ag(1) atom. The Sr(1)-Ag(1) bond length is 2.20 Å. In the second Sr site, Sr(2) is bonded in a single-bond geometry to one Ag(1) atom. The Sr(2)-Ag(1) bond length is 2.20 Å. Ag(1) is bonded in a distorted linear geometry to three equivalent Rb(1), one Sr(1), and one Sr(2) atom.