The crystal structure described by IrGe4 crystallizes in the trigonal P3_121 space group. Ir(1) is bonded in a 8-coordinate geometry to two equivalent Ge(1), two equivalent Ge(2), and four equivalent Ge(3) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 4-coordinate geometry to two equivalent Ir(1), one Ge(2), and two equivalent Ge(3) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Ir(1), one Ge(1), two equivalent Ge(2), and four equivalent Ge(3) atoms. In the third Ge site, Ge(3) is bonded in a 2-coordinate geometry to two equivalent Ir(1), one Ge(1), and two equivalent Ge(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ge4Ir
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.235
_cell_length_b   6.235
_cell_length_c   7.800
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   262.578
_cell_formula_units_Z   3
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
  Ge  Ge0  1  0.000  0.616  0.158  1.0
  Ge  Ge1  1  0.000  0.075  0.158  1.0
  Ge  Ge2  1  0.780  0.262  0.374  1.0
  Ge  Ge3  1  0.384  0.384  0.491  1.0
  Ge  Ge4  1  0.220  0.481  0.942  1.0
  Ge  Ge5  1  0.481  0.220  0.041  1.0
  Ge  Ge6  1  0.519  0.739  0.275  1.0
  Ge  Ge7  1  0.616  1.000  0.825  1.0
  Ge  Ge8  1  0.925  0.926  0.491  1.0
  Ge  Ge9  1  0.074  1.000  0.824  1.0
  Ge  Ge10  1  0.261  0.780  0.608  1.0
  Ge  Ge11  1  0.738  0.519  0.707  1.0
  Ir  Ir12  1  0.683  0.683  0.991  1.0
  Ir  Ir13  1  1.000  0.317  0.658  1.0
  Ir  Ir14  1  0.317  0.000  0.325  1.0
[/CIF]
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The crystal structure described by IrGe4 crystallizes in the trigonal P3_121 space group. Ir(1) is bonded in a 8-coordinate geometry to two equivalent Ge(1), two equivalent Ge(2), and four equivalent Ge(3) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 4-coordinate geometry to two equivalent Ir(1), one Ge(2), and two equivalent Ge(3) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Ir(1), one Ge(1), two equivalent Ge(2), and four equivalent Ge(3) atoms. In the third Ge site, Ge(3) is bonded in a 2-coordinate geometry to two equivalent Ir(1), one Ge(1), and two equivalent Ge(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ge4Ir
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.235
_cell_length_b   6.235
_cell_length_c   7.800
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   262.578
_cell_formula_units_Z   3
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
  Ge  Ge0  1  0.000  0.616  0.158  1.0
  Ge  Ge1  1  0.000  0.075  0.158  1.0
  Ge  Ge2  1  0.780  0.262  0.374  1.0
  Ge  Ge3  1  0.384  0.384  0.491  1.0
  Ge  Ge4  1  0.220  0.481  0.942  1.0
  Ge  Ge5  1  0.481  0.220  0.041  1.0
  Ge  Ge6  1  0.519  0.739  0.275  1.0
  Ge  Ge7  1  0.616  1.000  0.825  1.0
  Ge  Ge8  1  0.925  0.926  0.491  1.0
  Ge  Ge9  1  0.074  1.000  0.824  1.0
  Ge  Ge10  1  0.261  0.780  0.608  1.0
  Ge  Ge11  1  0.738  0.519  0.707  1.0
  Ir  Ir12  1  0.683  0.683  0.991  1.0
  Ir  Ir13  1  1.000  0.317  0.658  1.0
  Ir  Ir14  1  0.317  0.000  0.325  1.0
[/CIF]
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