data_SiAgIr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.23
_cell_length_b   4.23
_cell_length_c   4.23
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiAgIr
_chemical_formula_sum   'Si1 Ag1 Ir1'
_cell_volume   53.57
_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
  Si  Si2  1  0.0  0.0  0.0  1.0
  Ag  Ag0  1  0.49  0.49  0.49  1.0
  Ir  Ir1  1  0.99  0.99  0.99  1.0

data_SiAgIr
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.23
_cell_length_b   4.23
_cell_length_c   10.36
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   SiAgIr
_chemical_formula_sum   'Si3 Ag3 Ir3'
_cell_volume   160.7
_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
  Si  Si0  3  0.0  0.0  0.0  1.0
  Ag  Ag1  3  0.0  0.0  0.51  1.0
  Ir  Ir2  3  0.0  0.0  0.01  1.0

Si Ag Ir
Si Ag Ir 0 2 - - - 0 1 o o - 0 1 o - o 0 1 o - - 0 1 - o o 0 1 - o - 0 1 - - o 1 2 - - o 1 2 - o - 1 2 - o o 1 2 o - - 1 2 o - o 1 2 o o - 
IrAgSi crystallizes in the trigonal R3m space group. Ir(1) is bonded in a single-bond geometry to three equivalent Ag(1) and one Si(1) atom. All Ir(1)-Ag(1) bond lengths are 3.02 Å. The Ir(1)-Si(1) bond length is 0.08 Å. Ag(1) is bonded to three equivalent Ir(1) and three equivalent Si(1) atoms to form edge-sharing AgSi3Ir3 octahedra. All Ag(1)-Si(1) bond lengths are 2.92 Å. Si(1) is bonded in a single-bond geometry to one Ir(1) and three equivalent Ag(1) atoms.