data_MgIrOs2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.88
_cell_length_b   4.88
_cell_length_c   4.88
_cell_angle_alpha   134.21
_cell_angle_beta   134.21
_cell_angle_gamma   66.76
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgIrOs2
_chemical_formula_sum   'Mg1 Ir1 Os2'
_cell_volume   58.9
_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
  Mg  Mg1  1  0.0  0.0  0.0  1.0
  Ir  Ir0  1  0.0  0.0  0.08  1.0
  Os  Os2  1  0.9  0.0  0.04  1.0
  Os  Os3  1  0.0  0.9  0.04  1.0

data_MgIrOs2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.37
_cell_length_b   5.37
_cell_length_c   4.88
_cell_angle_alpha   90.0
_cell_angle_beta   123.38
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   MgIrOs2
_chemical_formula_sum   'Mg2 Ir2 Os4'
_cell_volume   117.81
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  Mg  Mg0  2  0.0  0.0  0.0  1.0
  Os  Os1  4  0.05  0.05  0.14  1.0
  Ir  Ir2  2  0.0  0.0  0.08  1.0

Mg Ir Os Os
MgOs2Ir is Indium-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two MgOs2Ir clusters. Mg(1) is bonded in a single-bond geometry to one Ir(1) atom. The Mg(1)-Ir(1) bond length is 0.38 Å. Os(1) is bonded in a distorted single-bond geometry to one Ir(1) atom. The Os(1)-Ir(1) bond length is 0.38 Å. Ir(1) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1) and two equivalent Os(1) atoms.