The material described by HfFeGe2 crystallizes in the orthorhombic Pbam space group. There are two inequivalent Hf sites. In the first Hf site, Hf(1) is bonded in a 8-coordinate geometry to one Ge(4), one Ge(5), two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms. In the second Hf site, Hf(2) is bonded in a 7-coordinate geometry to two equivalent Ge(1), two equivalent Ge(2), and three equivalent Ge(4) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 6-coordinate geometry to one Ge(2), one Ge(3), one Ge(4), one Ge(5), and two equivalent Ge(1) atoms. In the second Fe site, Fe(2) is bonded to two equivalent Ge(1), two equivalent Ge(4), and two equivalent Ge(5) atoms to form distorted edge-sharing FeGe6 cuboctahedra. There are five inequivalent Ge sites. In the first Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Hf(2), four equivalent Hf(1), two equivalent Fe(1), and one Ge(2) atom. In the second Ge site, Ge(3) is bonded in a 7-coordinate geometry to four equivalent Hf(1), two equivalent Fe(1), and one Ge(3) atom. In the third Ge site, Ge(4) is bonded in a 9-coordinate geometry to two equivalent Hf(1), three equivalent Hf(2), two equivalent Fe(1), and two equivalent Fe(2) atoms. In the fourth Ge site, Ge(5) is bonded in a 6-coordinate geometry to two equivalent Hf(1), two equivalent Fe(1), and two equivalent Fe(2) atoms. In the fifth Ge site, Ge(1) is bonded in a 7-coordinate geometry to one Hf(2), two equivalent Hf(1), one Fe(2), two equivalent Fe(1), and one Ge(1) atom. is represented by the CIF file [CIF]
data_HfFeGe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.919
_cell_length_b   9.114
_cell_length_c   10.152
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   732.732
_cell_formula_units_Z   12
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  0.744  0.826  0.049  1.0
  Hf  Hf1  1  0.744  0.174  0.951  1.0
  Hf  Hf2  1  0.256  0.674  0.549  1.0
  Hf  Hf3  1  0.256  0.326  0.451  1.0
  Hf  Hf4  1  0.256  0.174  0.951  1.0
  Hf  Hf5  1  0.256  0.826  0.049  1.0
  Hf  Hf6  1  0.744  0.326  0.451  1.0
  Hf  Hf7  1  0.744  0.674  0.549  1.0
  Hf  Hf8  1  0.500  0.835  0.321  1.0
  Hf  Hf9  1  0.500  0.165  0.679  1.0
  Hf  Hf10  1  0.500  0.665  0.821  1.0
  Hf  Hf11  1  0.500  0.335  0.179  1.0
  Fe  Fe12  1  0.749  0.592  0.254  1.0
  Fe  Fe13  1  0.749  0.408  0.746  1.0
  Fe  Fe14  1  0.251  0.908  0.754  1.0
  Fe  Fe15  1  0.251  0.092  0.246  1.0
  Fe  Fe16  1  0.251  0.408  0.746  1.0
  Fe  Fe17  1  0.251  0.592  0.254  1.0
  Fe  Fe18  1  0.749  0.092  0.246  1.0
  Fe  Fe19  1  0.749  0.908  0.754  1.0
  Fe  Fe20  1  0.745  0.000  0.500  1.0
  Fe  Fe21  1  0.255  0.500  0.000  1.0
  Fe  Fe22  1  0.255  0.000  0.500  1.0
  Fe  Fe23  1  0.745  0.500  0.000  1.0
  Ge  Ge24  1  0.843  0.841  0.319  1.0
  Ge  Ge25  1  0.843  0.159  0.681  1.0
  Ge  Ge26  1  0.157  0.659  0.819  1.0
  Ge  Ge27  1  0.157  0.341  0.181  1.0
  Ge  Ge28  1  0.157  0.159  0.681  1.0
  Ge  Ge29  1  0.157  0.841  0.319  1.0
  Ge  Ge30  1  0.843  0.341  0.181  1.0
  Ge  Ge31  1  0.843  0.659  0.819  1.0
  Ge  Ge32  1  0.500  0.541  0.380  1.0
  Ge  Ge33  1  0.500  0.459  0.620  1.0
  Ge  Ge34  1  0.500  0.959  0.880  1.0
  Ge  Ge35  1  0.500  0.041  0.120  1.0
  Ge  Ge36  1  0.000  0.548  0.379  1.0
  Ge  Ge37  1  0.000  0.452  0.621  1.0
  Ge  Ge38  1  0.000  0.952  0.879  1.0
  Ge  Ge39  1  0.000  0.048  0.121  1.0
  Ge  Ge40  1  0.500  0.628  0.102  1.0
  Ge  Ge41  1  0.500  0.372  0.898  1.0
  Ge  Ge42  1  0.500  0.872  0.602  1.0
  Ge  Ge43  1  0.500  0.128  0.398  1.0
  Ge  Ge44  1  0.000  0.624  0.099  1.0
  Ge  Ge45  1  0.000  0.376  0.901  1.0
  Ge  Ge46  1  0.000  0.876  0.599  1.0
  Ge  Ge47  1  0.000  0.124  0.401  1.0
[/CIF]
.
The material described by HfFeGe2 crystallizes in the orthorhombic Pbam space group. There are two inequivalent Hf sites. In the first Hf site, Hf(1) is bonded in a 8-coordinate geometry to one Ge(4), one Ge(5), two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms. In the second Hf site, Hf(2) is bonded in a 7-coordinate geometry to two equivalent Ge(1), two equivalent Ge(2), and three equivalent Ge(4) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 6-coordinate geometry to one Ge(2), one Ge(3), one Ge(4), one Ge(5), and two equivalent Ge(1) atoms. In the second Fe site, Fe(2) is bonded to two equivalent Ge(1), two equivalent Ge(4), and two equivalent Ge(5) atoms to form distorted edge-sharing FeGe6 cuboctahedra. There are five inequivalent Ge sites. In the first Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Hf(2), four equivalent Hf(1), two equivalent Fe(1), and one Ge(2) atom. In the second Ge site, Ge(3) is bonded in a 7-coordinate geometry to four equivalent Hf(1), two equivalent Fe(1), and one Ge(3) atom. In the third Ge site, Ge(4) is bonded in a 9-coordinate geometry to two equivalent Hf(1), three equivalent Hf(2), two equivalent Fe(1), and two equivalent Fe(2) atoms. In the fourth Ge site, Ge(5) is bonded in a 6-coordinate geometry to two equivalent Hf(1), two equivalent Fe(1), and two equivalent Fe(2) atoms. In the fifth Ge site, Ge(1) is bonded in a 7-coordinate geometry to one Hf(2), two equivalent Hf(1), one Fe(2), two equivalent Fe(1), and one Ge(1) atom. is represented by the CIF file [CIF]
data_HfFeGe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.919
_cell_length_b   9.114
_cell_length_c   10.152
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   732.732
_cell_formula_units_Z   12
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  0.744  0.826  0.049  1.0
  Hf  Hf1  1  0.744  0.174  0.951  1.0
  Hf  Hf2  1  0.256  0.674  0.549  1.0
  Hf  Hf3  1  0.256  0.326  0.451  1.0
  Hf  Hf4  1  0.256  0.174  0.951  1.0
  Hf  Hf5  1  0.256  0.826  0.049  1.0
  Hf  Hf6  1  0.744  0.326  0.451  1.0
  Hf  Hf7  1  0.744  0.674  0.549  1.0
  Hf  Hf8  1  0.500  0.835  0.321  1.0
  Hf  Hf9  1  0.500  0.165  0.679  1.0
  Hf  Hf10  1  0.500  0.665  0.821  1.0
  Hf  Hf11  1  0.500  0.335  0.179  1.0
  Fe  Fe12  1  0.749  0.592  0.254  1.0
  Fe  Fe13  1  0.749  0.408  0.746  1.0
  Fe  Fe14  1  0.251  0.908  0.754  1.0
  Fe  Fe15  1  0.251  0.092  0.246  1.0
  Fe  Fe16  1  0.251  0.408  0.746  1.0
  Fe  Fe17  1  0.251  0.592  0.254  1.0
  Fe  Fe18  1  0.749  0.092  0.246  1.0
  Fe  Fe19  1  0.749  0.908  0.754  1.0
  Fe  Fe20  1  0.745  0.000  0.500  1.0
  Fe  Fe21  1  0.255  0.500  0.000  1.0
  Fe  Fe22  1  0.255  0.000  0.500  1.0
  Fe  Fe23  1  0.745  0.500  0.000  1.0
  Ge  Ge24  1  0.843  0.841  0.319  1.0
  Ge  Ge25  1  0.843  0.159  0.681  1.0
  Ge  Ge26  1  0.157  0.659  0.819  1.0
  Ge  Ge27  1  0.157  0.341  0.181  1.0
  Ge  Ge28  1  0.157  0.159  0.681  1.0
  Ge  Ge29  1  0.157  0.841  0.319  1.0
  Ge  Ge30  1  0.843  0.341  0.181  1.0
  Ge  Ge31  1  0.843  0.659  0.819  1.0
  Ge  Ge32  1  0.500  0.541  0.380  1.0
  Ge  Ge33  1  0.500  0.459  0.620  1.0
  Ge  Ge34  1  0.500  0.959  0.880  1.0
  Ge  Ge35  1  0.500  0.041  0.120  1.0
  Ge  Ge36  1  0.000  0.548  0.379  1.0
  Ge  Ge37  1  0.000  0.452  0.621  1.0
  Ge  Ge38  1  0.000  0.952  0.879  1.0
  Ge  Ge39  1  0.000  0.048  0.121  1.0
  Ge  Ge40  1  0.500  0.628  0.102  1.0
  Ge  Ge41  1  0.500  0.372  0.898  1.0
  Ge  Ge42  1  0.500  0.872  0.602  1.0
  Ge  Ge43  1  0.500  0.128  0.398  1.0
  Ge  Ge44  1  0.000  0.624  0.099  1.0
  Ge  Ge45  1  0.000  0.376  0.901  1.0
  Ge  Ge46  1  0.000  0.876  0.599  1.0
  Ge  Ge47  1  0.000  0.124  0.401  1.0
[/CIF]
.