The structure described by UIr2Ge2 crystallizes in the tetragonal P4/nmm space group. U(1) is bonded in a 16-coordinate geometry to four equivalent Ir(1), four equivalent Ir(2), four equivalent Ge(1), and four equivalent Ge(2) atoms. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded to four equivalent U(1) and four equivalent Ge(2) atoms to form distorted IrU4Ge4 tetrahedra that share corners with twelve equivalent Ge(1)U4Ir4 tetrahedra, edges with two equivalent Ge(1)U4Ir4 tetrahedra, edges with four equivalent Ir(1)U4Ge4 tetrahedra, and faces with four equivalent Ir(1)U4Ge4 tetrahedra. In the second Ir site, Ir(2) is bonded in a 9-coordinate geometry to four equivalent U(1), one Ge(2), and four equivalent Ge(1) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to four equivalent U(1) and four equivalent Ir(2) atoms to form distorted GeU4Ir4 tetrahedra that share corners with twelve equivalent Ir(1)U4Ge4 tetrahedra, edges with two equivalent Ir(1)U4Ge4 tetrahedra, edges with four equivalent Ge(1)U4Ir4 tetrahedra, and faces with four equivalent Ge(1)U4Ir4 tetrahedra. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to four equivalent U(1), one Ir(2), and four equivalent Ir(1) atoms. is represented by the CIF card [CIF]
data_U(GeIr)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.205
_cell_length_b   4.205
_cell_length_c   10.174
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   179.860
_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
  U  U0  1  0.000  0.500  0.257  1.0
  U  U1  1  0.500  0.000  0.743  1.0
  Ge  Ge2  1  0.000  0.000  0.500  1.0
  Ge  Ge3  1  0.500  0.500  0.500  1.0
  Ge  Ge4  1  0.000  0.500  0.867  1.0
  Ge  Ge5  1  0.500  0.000  0.133  1.0
  Ir  Ir6  1  0.000  0.000  0.000  1.0
  Ir  Ir7  1  0.500  0.500  0.000  1.0
  Ir  Ir8  1  0.000  0.500  0.631  1.0
  Ir  Ir9  1  0.500  0.000  0.369  1.0
[/CIF]
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The structure described by UIr2Ge2 crystallizes in the tetragonal P4/nmm space group. U(1) is bonded in a 16-coordinate geometry to four equivalent Ir(1), four equivalent Ir(2), four equivalent Ge(1), and four equivalent Ge(2) atoms. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded to four equivalent U(1) and four equivalent Ge(2) atoms to form distorted IrU4Ge4 tetrahedra that share corners with twelve equivalent Ge(1)U4Ir4 tetrahedra, edges with two equivalent Ge(1)U4Ir4 tetrahedra, edges with four equivalent Ir(1)U4Ge4 tetrahedra, and faces with four equivalent Ir(1)U4Ge4 tetrahedra. In the second Ir site, Ir(2) is bonded in a 9-coordinate geometry to four equivalent U(1), one Ge(2), and four equivalent Ge(1) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to four equivalent U(1) and four equivalent Ir(2) atoms to form distorted GeU4Ir4 tetrahedra that share corners with twelve equivalent Ir(1)U4Ge4 tetrahedra, edges with two equivalent Ir(1)U4Ge4 tetrahedra, edges with four equivalent Ge(1)U4Ir4 tetrahedra, and faces with four equivalent Ge(1)U4Ir4 tetrahedra. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to four equivalent U(1), one Ir(2), and four equivalent Ir(1) atoms. is represented by the CIF card [CIF]
data_U(GeIr)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.205
_cell_length_b   4.205
_cell_length_c   10.174
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   179.860
_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
  U  U0  1  0.000  0.500  0.257  1.0
  U  U1  1  0.500  0.000  0.743  1.0
  Ge  Ge2  1  0.000  0.000  0.500  1.0
  Ge  Ge3  1  0.500  0.500  0.500  1.0
  Ge  Ge4  1  0.000  0.500  0.867  1.0
  Ge  Ge5  1  0.500  0.000  0.133  1.0
  Ir  Ir6  1  0.000  0.000  0.000  1.0
  Ir  Ir7  1  0.500  0.500  0.000  1.0
  Ir  Ir8  1  0.000  0.500  0.631  1.0
  Ir  Ir9  1  0.500  0.000  0.369  1.0
[/CIF]
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