data_Sr2IrOs
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.98
_cell_length_b   4.98
_cell_length_c   4.98
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sr2IrOs
_chemical_formula_sum   'Sr2 Ir1 Os1'
_cell_volume   87.31
_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  Sr2  1  0.28  0.28  0.28  1.0
  Sr  Sr3  1  0.0  0.0  0.0  1.0
  Ir  Ir0  1  0.76  0.76  0.76  1.0
  Os  Os1  1  0.52  0.52  0.52  1.0

data_Sr2IrOs
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.98
_cell_length_b   4.98
_cell_length_c   12.2
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   Sr2IrOs
_chemical_formula_sum   'Sr6 Ir3 Os3'
_cell_volume   261.94
_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
  Sr  Sr1  3  0.0  0.0  0.72  1.0
  Ir  Ir2  3  0.0  0.0  0.24  1.0
  Os  Os3  3  0.0  0.0  0.48  1.0

Sr Sr Ir Os
Sr Sr Ir Os 0 1 o o o 0 1 o o + 0 1 o + o 0 1 + o o 0 3 o - o 0 3 - o o 0 3 o o - 0 3 o o o 0 2 - o o 0 2 o - o 0 2 o o - 1 2 - - - 1 2 - - o 1 2 o - - 1 2 - o - 1 3 - - o 1 3 - o - 1 3 o - - 2 3 o o o 2 3 o o + 2 3 + o o 2 3 o + o 
SrOsSrIr is Zintl Phase-derived structured and crystallizes in the trigonal R3m space group. The structure consists of one SrIr framework and one SrOs framework. In the SrIr framework, Sr(2) is bonded to four equivalent Ir(1) atoms to form distorted corner-sharing SrIr4 tetrahedra. There is one shorter (2.92 Å) and three longer (3.09 Å) Sr(2)-Ir(1) bond lengths. Ir(1) is bonded to four equivalent Sr(2) atoms to form distorted corner-sharing IrSr4 tetrahedra. In the SrOs framework, Sr(1) is bonded to four equivalent Os(1) atoms to form distorted corner-sharing SrOs4 tetrahedra. There is one shorter (2.92 Å) and three longer (3.09 Å) Sr(1)-Os(1) bond lengths. Os(1) is bonded to four equivalent Sr(1) atoms to form distorted corner-sharing OsSr4 tetrahedra.