data_KIr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.84
_cell_length_b   2.84
_cell_length_c   10.94
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   KIr
_chemical_formula_sum   'K2 Ir2'
_cell_volume   76.55
_cell_formula_units_Z   2
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
  K  K2  1  0.0  0.0  0.47  1.0
  K  K3  1  0.0  0.0  0.0  1.0
  Ir  Ir0  1  0.42  0.82  0.21  1.0
  Ir  Ir1  1  0.0  0.64  0.74  1.0

data_KIr
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.84
_cell_length_b   2.84
_cell_length_c   10.94
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   KIr
_chemical_formula_sum   'K2 Ir2'
_cell_volume   76.55
_cell_formula_units_Z   2
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
  K  K0  1  0.0  0.0  0.0  1.0
  K  K1  1  0.0  0.0  0.47  1.0
  Ir  Ir2  1  0.0  0.64  0.74  1.0
  Ir  Ir3  1  0.42  0.82  0.21  1.0

K K Ir Ir
KIr is beta Plutonium-derived structured and crystallizes in the triclinic P1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 11-coordinate geometry to six equivalent K(1), two equivalent Ir(2), and three equivalent Ir(1) atoms. All K(1)-K(1) bond lengths are 2.84 Å. There is one shorter (3.07 Å) and one longer (3.42 Å) K(1)-Ir(2) bond length. There are a spread of K(1)-Ir(1) bond distances ranging from 3.24-3.53 Å. In the second K site, K(2) is bonded in a 3-coordinate geometry to one Ir(2) and two equivalent Ir(1) atoms. The K(2)-Ir(2) bond length is 3.07 Å. There is one shorter (2.70 Å) and one longer (2.73 Å) K(2)-Ir(1) bond length. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 2-coordinate geometry to two equivalent K(2) and three equivalent K(1) atoms. In the second Ir site, Ir(2) is bonded in a 2-coordinate geometry to one K(2) and two equivalent K(1) atoms.