The material described by Hf3Ge crystallizes in the tetragonal P4_2/n space group. There are three inequivalent Hf sites. In the first Hf site, Hf(1) is bonded in a 3-coordinate geometry to three equivalent Ge(1) atoms. In the second Hf site, Hf(2) is bonded in a distorted see-saw-like geometry to four equivalent Ge(1) atoms. In the third Hf site, Hf(3) is bonded in a distorted bent 150 degrees geometry to two equivalent Ge(1) atoms. Ge(1) is bonded in a 9-coordinate geometry to two equivalent Hf(3), three equivalent Hf(1), and four equivalent Hf(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Hf3Ge
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.917
_cell_length_b   10.917
_cell_length_c   5.406
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   644.362
_cell_formula_units_Z   8
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
  Hf  Hf0  1  0.716  0.818  0.505  1.0
  Hf  Hf1  1  0.284  0.182  0.505  1.0
  Hf  Hf2  1  0.216  0.318  0.995  1.0
  Hf  Hf3  1  0.784  0.682  0.995  1.0
  Hf  Hf4  1  0.182  0.716  0.495  1.0
  Hf  Hf5  1  0.818  0.284  0.495  1.0
  Hf  Hf6  1  0.682  0.216  0.005  1.0
  Hf  Hf7  1  0.318  0.784  0.005  1.0
  Hf  Hf8  1  0.641  0.473  0.722  1.0
  Hf  Hf9  1  0.359  0.527  0.722  1.0
  Hf  Hf10  1  0.141  0.973  0.778  1.0
  Hf  Hf11  1  0.859  0.027  0.778  1.0
  Hf  Hf12  1  0.527  0.641  0.278  1.0
  Hf  Hf13  1  0.473  0.359  0.278  1.0
  Hf  Hf14  1  0.027  0.141  0.222  1.0
  Hf  Hf15  1  0.973  0.859  0.222  1.0
  Hf  Hf16  1  0.607  0.917  0.026  1.0
  Hf  Hf17  1  0.393  0.083  0.026  1.0
  Hf  Hf18  1  0.107  0.417  0.474  1.0
  Hf  Hf19  1  0.893  0.583  0.474  1.0
  Hf  Hf20  1  0.083  0.607  0.974  1.0
  Hf  Hf21  1  0.917  0.393  0.974  1.0
  Hf  Hf22  1  0.583  0.107  0.526  1.0
  Hf  Hf23  1  0.417  0.893  0.526  1.0
  Ge  Ge24  1  0.704  0.459  0.214  1.0
  Ge  Ge25  1  0.296  0.541  0.214  1.0
  Ge  Ge26  1  0.204  0.959  0.286  1.0
  Ge  Ge27  1  0.796  0.041  0.286  1.0
  Ge  Ge28  1  0.541  0.704  0.786  1.0
  Ge  Ge29  1  0.459  0.296  0.786  1.0
  Ge  Ge30  1  0.041  0.204  0.714  1.0
  Ge  Ge31  1  0.959  0.796  0.714  1.0
[/CIF]
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The material described by Hf3Ge crystallizes in the tetragonal P4_2/n space group. There are three inequivalent Hf sites. In the first Hf site, Hf(1) is bonded in a 3-coordinate geometry to three equivalent Ge(1) atoms. In the second Hf site, Hf(2) is bonded in a distorted see-saw-like geometry to four equivalent Ge(1) atoms. In the third Hf site, Hf(3) is bonded in a distorted bent 150 degrees geometry to two equivalent Ge(1) atoms. Ge(1) is bonded in a 9-coordinate geometry to two equivalent Hf(3), three equivalent Hf(1), and four equivalent Hf(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Hf3Ge
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.917
_cell_length_b   10.917
_cell_length_c   5.406
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   644.362
_cell_formula_units_Z   8
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
  Hf  Hf0  1  0.716  0.818  0.505  1.0
  Hf  Hf1  1  0.284  0.182  0.505  1.0
  Hf  Hf2  1  0.216  0.318  0.995  1.0
  Hf  Hf3  1  0.784  0.682  0.995  1.0
  Hf  Hf4  1  0.182  0.716  0.495  1.0
  Hf  Hf5  1  0.818  0.284  0.495  1.0
  Hf  Hf6  1  0.682  0.216  0.005  1.0
  Hf  Hf7  1  0.318  0.784  0.005  1.0
  Hf  Hf8  1  0.641  0.473  0.722  1.0
  Hf  Hf9  1  0.359  0.527  0.722  1.0
  Hf  Hf10  1  0.141  0.973  0.778  1.0
  Hf  Hf11  1  0.859  0.027  0.778  1.0
  Hf  Hf12  1  0.527  0.641  0.278  1.0
  Hf  Hf13  1  0.473  0.359  0.278  1.0
  Hf  Hf14  1  0.027  0.141  0.222  1.0
  Hf  Hf15  1  0.973  0.859  0.222  1.0
  Hf  Hf16  1  0.607  0.917  0.026  1.0
  Hf  Hf17  1  0.393  0.083  0.026  1.0
  Hf  Hf18  1  0.107  0.417  0.474  1.0
  Hf  Hf19  1  0.893  0.583  0.474  1.0
  Hf  Hf20  1  0.083  0.607  0.974  1.0
  Hf  Hf21  1  0.917  0.393  0.974  1.0
  Hf  Hf22  1  0.583  0.107  0.526  1.0
  Hf  Hf23  1  0.417  0.893  0.526  1.0
  Ge  Ge24  1  0.704  0.459  0.214  1.0
  Ge  Ge25  1  0.296  0.541  0.214  1.0
  Ge  Ge26  1  0.204  0.959  0.286  1.0
  Ge  Ge27  1  0.796  0.041  0.286  1.0
  Ge  Ge28  1  0.541  0.704  0.786  1.0
  Ge  Ge29  1  0.459  0.296  0.786  1.0
  Ge  Ge30  1  0.041  0.204  0.714  1.0
  Ge  Ge31  1  0.959  0.796  0.714  1.0
[/CIF]
.