The crystal structure described by Pr5Ge4 crystallizes in the orthorhombic Pnma space group. There are three inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 6-coordinate geometry to one Ge(3), two equivalent Ge(2), and three equivalent Ge(1) atoms. In the second Pr site, Pr(2) is bonded in a 6-coordinate geometry to one Ge(2), two equivalent Ge(3), and four equivalent Ge(1) atoms. In the third Pr site, Pr(3) is bonded to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms to form corner-sharing PrGe6 octahedra. The corner-sharing octahedral tilt angles range from 54-56°. There are three inequivalent Ge sites. In the first Ge site, Ge(3) is bonded in a 9-coordinate geometry to two equivalent Pr(1), two equivalent Pr(3), four equivalent Pr(2), and one Ge(2) atom. In the second Ge site, Ge(1) is bonded in a 8-coordinate geometry to one Pr(3), three equivalent Pr(1), and four equivalent Pr(2) atoms. In the third Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Pr(2), two equivalent Pr(3), four equivalent Pr(1), and one Ge(3) atom. is represented by the CIF file [CIF]
data_Pr5Ge4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.017
_cell_length_b   8.111
_cell_length_c   15.358
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   998.665
_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
  Pr  Pr0  1  0.380  0.160  0.114  1.0
  Pr  Pr1  1  0.880  0.340  0.386  1.0
  Pr  Pr2  1  0.120  0.660  0.886  1.0
  Pr  Pr3  1  0.620  0.840  0.614  1.0
  Pr  Pr4  1  0.380  0.160  0.386  1.0
  Pr  Pr5  1  0.880  0.340  0.114  1.0
  Pr  Pr6  1  0.120  0.660  0.614  1.0
  Pr  Pr7  1  0.620  0.840  0.886  1.0
  Pr  Pr8  1  0.025  0.821  0.397  1.0
  Pr  Pr9  1  0.525  0.679  0.103  1.0
  Pr  Pr10  1  0.475  0.321  0.603  1.0
  Pr  Pr11  1  0.975  0.179  0.897  1.0
  Pr  Pr12  1  0.975  0.179  0.603  1.0
  Pr  Pr13  1  0.475  0.321  0.897  1.0
  Pr  Pr14  1  0.525  0.679  0.397  1.0
  Pr  Pr15  1  0.025  0.821  0.103  1.0
  Pr  Pr16  1  0.285  0.997  0.750  1.0
  Pr  Pr17  1  0.785  0.503  0.750  1.0
  Pr  Pr18  1  0.215  0.497  0.250  1.0
  Pr  Pr19  1  0.715  0.003  0.250  1.0
  Ge  Ge20  1  0.778  0.532  0.545  1.0
  Ge  Ge21  1  0.278  0.968  0.955  1.0
  Ge  Ge22  1  0.722  0.032  0.455  1.0
  Ge  Ge23  1  0.222  0.468  0.045  1.0
  Ge  Ge24  1  0.222  0.468  0.455  1.0
  Ge  Ge25  1  0.722  0.032  0.045  1.0
  Ge  Ge26  1  0.278  0.968  0.545  1.0
  Ge  Ge27  1  0.778  0.532  0.955  1.0
  Ge  Ge28  1  0.910  0.891  0.750  1.0
  Ge  Ge29  1  0.410  0.609  0.750  1.0
  Ge  Ge30  1  0.590  0.391  0.250  1.0
  Ge  Ge31  1  0.090  0.109  0.250  1.0
  Ge  Ge32  1  0.175  0.368  0.750  1.0
  Ge  Ge33  1  0.675  0.132  0.750  1.0
  Ge  Ge34  1  0.325  0.868  0.250  1.0
  Ge  Ge35  1  0.825  0.632  0.250  1.0
[/CIF]
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The crystal structure described by Pr5Ge4 crystallizes in the orthorhombic Pnma space group. There are three inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 6-coordinate geometry to one Ge(3), two equivalent Ge(2), and three equivalent Ge(1) atoms. In the second Pr site, Pr(2) is bonded in a 6-coordinate geometry to one Ge(2), two equivalent Ge(3), and four equivalent Ge(1) atoms. In the third Pr site, Pr(3) is bonded to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms to form corner-sharing PrGe6 octahedra. The corner-sharing octahedral tilt angles range from 54-56°. There are three inequivalent Ge sites. In the first Ge site, Ge(3) is bonded in a 9-coordinate geometry to two equivalent Pr(1), two equivalent Pr(3), four equivalent Pr(2), and one Ge(2) atom. In the second Ge site, Ge(1) is bonded in a 8-coordinate geometry to one Pr(3), three equivalent Pr(1), and four equivalent Pr(2) atoms. In the third Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Pr(2), two equivalent Pr(3), four equivalent Pr(1), and one Ge(3) atom. is represented by the CIF file [CIF]
data_Pr5Ge4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.017
_cell_length_b   8.111
_cell_length_c   15.358
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   998.665
_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
  Pr  Pr0  1  0.380  0.160  0.114  1.0
  Pr  Pr1  1  0.880  0.340  0.386  1.0
  Pr  Pr2  1  0.120  0.660  0.886  1.0
  Pr  Pr3  1  0.620  0.840  0.614  1.0
  Pr  Pr4  1  0.380  0.160  0.386  1.0
  Pr  Pr5  1  0.880  0.340  0.114  1.0
  Pr  Pr6  1  0.120  0.660  0.614  1.0
  Pr  Pr7  1  0.620  0.840  0.886  1.0
  Pr  Pr8  1  0.025  0.821  0.397  1.0
  Pr  Pr9  1  0.525  0.679  0.103  1.0
  Pr  Pr10  1  0.475  0.321  0.603  1.0
  Pr  Pr11  1  0.975  0.179  0.897  1.0
  Pr  Pr12  1  0.975  0.179  0.603  1.0
  Pr  Pr13  1  0.475  0.321  0.897  1.0
  Pr  Pr14  1  0.525  0.679  0.397  1.0
  Pr  Pr15  1  0.025  0.821  0.103  1.0
  Pr  Pr16  1  0.285  0.997  0.750  1.0
  Pr  Pr17  1  0.785  0.503  0.750  1.0
  Pr  Pr18  1  0.215  0.497  0.250  1.0
  Pr  Pr19  1  0.715  0.003  0.250  1.0
  Ge  Ge20  1  0.778  0.532  0.545  1.0
  Ge  Ge21  1  0.278  0.968  0.955  1.0
  Ge  Ge22  1  0.722  0.032  0.455  1.0
  Ge  Ge23  1  0.222  0.468  0.045  1.0
  Ge  Ge24  1  0.222  0.468  0.455  1.0
  Ge  Ge25  1  0.722  0.032  0.045  1.0
  Ge  Ge26  1  0.278  0.968  0.545  1.0
  Ge  Ge27  1  0.778  0.532  0.955  1.0
  Ge  Ge28  1  0.910  0.891  0.750  1.0
  Ge  Ge29  1  0.410  0.609  0.750  1.0
  Ge  Ge30  1  0.590  0.391  0.250  1.0
  Ge  Ge31  1  0.090  0.109  0.250  1.0
  Ge  Ge32  1  0.175  0.368  0.750  1.0
  Ge  Ge33  1  0.675  0.132  0.750  1.0
  Ge  Ge34  1  0.325  0.868  0.250  1.0
  Ge  Ge35  1  0.825  0.632  0.250  1.0
[/CIF]
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