The compound described by Ho2Nb3Ge4 crystallizes in the orthorhombic Pnma space group. Ho(1) is bonded in a 7-coordinate geometry to one Ge(2), two equivalent Ge(1), and four equivalent Ge(3) atoms. There are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms to form distorted corner-sharing NbGe6 octahedra. The corner-sharing octahedral tilt angles range from 47-55°. In the second Nb site, Nb(2) is bonded in a 6-coordinate geometry to one Ge(1), two equivalent Ge(2), and three equivalent Ge(3) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to four equivalent Ho(1), two equivalent Nb(1), two equivalent Nb(2), and one Ge(2) atom. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Ho(1), two equivalent Nb(1), four equivalent Nb(2), and one Ge(1) atom. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to four equivalent Ho(1), one Nb(1), three equivalent Nb(2), and one Ge(3) atom. is represented by the CIF card [CIF]
data_Ho2Nb3Ge4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.976
_cell_length_b   7.161
_cell_length_c   13.517
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   675.253
_cell_formula_units_Z   4
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
  Ho  Ho0  1  0.497  0.325  0.095  1.0
  Ho  Ho1  1  0.997  0.175  0.405  1.0
  Ho  Ho2  1  0.503  0.675  0.595  1.0
  Ho  Ho3  1  0.003  0.825  0.905  1.0
  Ho  Ho4  1  0.503  0.675  0.905  1.0
  Ho  Ho5  1  0.003  0.825  0.595  1.0
  Ho  Ho6  1  0.497  0.325  0.405  1.0
  Ho  Ho7  1  0.997  0.175  0.095  1.0
  Nb  Nb8  1  0.665  0.013  0.750  1.0
  Nb  Nb9  1  0.165  0.487  0.750  1.0
  Nb  Nb10  1  0.335  0.987  0.250  1.0
  Nb  Nb11  1  0.835  0.513  0.250  1.0
  Nb  Nb12  1  0.841  0.328  0.627  1.0
  Nb  Nb13  1  0.341  0.172  0.873  1.0
  Nb  Nb14  1  0.159  0.672  0.127  1.0
  Nb  Nb15  1  0.659  0.828  0.373  1.0
  Nb  Nb16  1  0.159  0.672  0.373  1.0
  Nb  Nb17  1  0.659  0.828  0.127  1.0
  Nb  Nb18  1  0.841  0.328  0.873  1.0
  Nb  Nb19  1  0.341  0.172  0.627  1.0
  Ge  Ge20  1  0.805  0.637  0.750  1.0
  Ge  Ge21  1  0.305  0.863  0.750  1.0
  Ge  Ge22  1  0.195  0.363  0.250  1.0
  Ge  Ge23  1  0.695  0.137  0.250  1.0
  Ge  Ge24  1  0.540  0.380  0.750  1.0
  Ge  Ge25  1  0.040  0.120  0.750  1.0
  Ge  Ge26  1  0.460  0.620  0.250  1.0
  Ge  Ge27  1  0.960  0.880  0.250  1.0
  Ge  Ge28  1  0.675  0.038  0.541  1.0
  Ge  Ge29  1  0.175  0.462  0.959  1.0
  Ge  Ge30  1  0.325  0.962  0.041  1.0
  Ge  Ge31  1  0.825  0.538  0.459  1.0
  Ge  Ge32  1  0.325  0.962  0.459  1.0
  Ge  Ge33  1  0.825  0.538  0.041  1.0
  Ge  Ge34  1  0.675  0.038  0.959  1.0
  Ge  Ge35  1  0.175  0.462  0.541  1.0
[/CIF]
.
The compound described by Ho2Nb3Ge4 crystallizes in the orthorhombic Pnma space group. Ho(1) is bonded in a 7-coordinate geometry to one Ge(2), two equivalent Ge(1), and four equivalent Ge(3) atoms. There are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms to form distorted corner-sharing NbGe6 octahedra. The corner-sharing octahedral tilt angles range from 47-55°. In the second Nb site, Nb(2) is bonded in a 6-coordinate geometry to one Ge(1), two equivalent Ge(2), and three equivalent Ge(3) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to four equivalent Ho(1), two equivalent Nb(1), two equivalent Nb(2), and one Ge(2) atom. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Ho(1), two equivalent Nb(1), four equivalent Nb(2), and one Ge(1) atom. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to four equivalent Ho(1), one Nb(1), three equivalent Nb(2), and one Ge(3) atom. is represented by the CIF card [CIF]
data_Ho2Nb3Ge4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.976
_cell_length_b   7.161
_cell_length_c   13.517
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   675.253
_cell_formula_units_Z   4
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
  Ho  Ho0  1  0.497  0.325  0.095  1.0
  Ho  Ho1  1  0.997  0.175  0.405  1.0
  Ho  Ho2  1  0.503  0.675  0.595  1.0
  Ho  Ho3  1  0.003  0.825  0.905  1.0
  Ho  Ho4  1  0.503  0.675  0.905  1.0
  Ho  Ho5  1  0.003  0.825  0.595  1.0
  Ho  Ho6  1  0.497  0.325  0.405  1.0
  Ho  Ho7  1  0.997  0.175  0.095  1.0
  Nb  Nb8  1  0.665  0.013  0.750  1.0
  Nb  Nb9  1  0.165  0.487  0.750  1.0
  Nb  Nb10  1  0.335  0.987  0.250  1.0
  Nb  Nb11  1  0.835  0.513  0.250  1.0
  Nb  Nb12  1  0.841  0.328  0.627  1.0
  Nb  Nb13  1  0.341  0.172  0.873  1.0
  Nb  Nb14  1  0.159  0.672  0.127  1.0
  Nb  Nb15  1  0.659  0.828  0.373  1.0
  Nb  Nb16  1  0.159  0.672  0.373  1.0
  Nb  Nb17  1  0.659  0.828  0.127  1.0
  Nb  Nb18  1  0.841  0.328  0.873  1.0
  Nb  Nb19  1  0.341  0.172  0.627  1.0
  Ge  Ge20  1  0.805  0.637  0.750  1.0
  Ge  Ge21  1  0.305  0.863  0.750  1.0
  Ge  Ge22  1  0.195  0.363  0.250  1.0
  Ge  Ge23  1  0.695  0.137  0.250  1.0
  Ge  Ge24  1  0.540  0.380  0.750  1.0
  Ge  Ge25  1  0.040  0.120  0.750  1.0
  Ge  Ge26  1  0.460  0.620  0.250  1.0
  Ge  Ge27  1  0.960  0.880  0.250  1.0
  Ge  Ge28  1  0.675  0.038  0.541  1.0
  Ge  Ge29  1  0.175  0.462  0.959  1.0
  Ge  Ge30  1  0.325  0.962  0.041  1.0
  Ge  Ge31  1  0.825  0.538  0.459  1.0
  Ge  Ge32  1  0.325  0.962  0.459  1.0
  Ge  Ge33  1  0.825  0.538  0.041  1.0
  Ge  Ge34  1  0.675  0.038  0.959  1.0
  Ge  Ge35  1  0.175  0.462  0.541  1.0
[/CIF]
.