The structure described by Pr2(ZnGe2)3 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 14-coordinate geometry to two equivalent Zn(2), four equivalent Zn(1), two equivalent Ge(2), two equivalent Ge(3), and four equivalent Ge(1) atoms. In the second Pr site, Pr(2) is bonded in a 14-coordinate geometry to two equivalent Zn(2), four equivalent Zn(1), two equivalent Ge(2), two equivalent Ge(3), and four equivalent Ge(1) atoms. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent Pr(1), two equivalent Pr(2), two equivalent Ge(2), and two equivalent Ge(3) atoms to form a mixture of distorted face and edge-sharing ZnPr4Ge4 tetrahedra. In the second Zn site, Zn(2) is bonded in a 5-coordinate geometry to two equivalent Pr(1), two equivalent Pr(2), one Ge(2), and four equivalent Ge(1) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 6-coordinate geometry to one Pr(1), one Pr(2), one Zn(2), and three equivalent Ge(1) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Pr(1), two equivalent Pr(2), one Zn(2), and four equivalent Zn(1) atoms. In the third Ge site, Ge(3) is bonded in a 8-coordinate geometry to two equivalent Pr(1), two equivalent Pr(2), and four equivalent Zn(1) atoms. is represented by the CIF file [CIF]
data_Pr2(ZnGe2)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.821
_cell_length_b   12.821
_cell_length_c   5.990
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   152.941
_symmetry_Int_Tables_number   1
_cell_volume   447.943
_cell_formula_units_Z   2
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  0.394  0.606  0.750  1.0
  Pr  Pr1  1  0.606  0.394  0.250  1.0
  Pr  Pr2  1  0.894  0.106  0.250  1.0
  Pr  Pr3  1  0.106  0.894  0.750  1.0
  Zn  Zn4  1  0.735  0.735  0.000  1.0
  Zn  Zn5  1  0.840  0.160  0.750  1.0
  Zn  Zn6  1  0.735  0.735  0.500  1.0
  Zn  Zn7  1  0.265  0.265  0.000  1.0
  Zn  Zn8  1  0.160  0.840  0.250  1.0
  Zn  Zn9  1  0.265  0.265  0.500  1.0
  Ge  Ge10  1  0.083  0.485  0.034  1.0
  Ge  Ge11  1  0.917  0.515  0.534  1.0
  Ge  Ge12  1  0.515  0.917  0.034  1.0
  Ge  Ge13  1  0.485  0.083  0.534  1.0
  Ge  Ge14  1  0.917  0.515  0.966  1.0
  Ge  Ge15  1  0.083  0.485  0.466  1.0
  Ge  Ge16  1  0.485  0.083  0.966  1.0
  Ge  Ge17  1  0.058  0.942  0.250  1.0
  Ge  Ge18  1  0.569  0.431  0.750  1.0
  Ge  Ge19  1  0.431  0.569  0.250  1.0
  Ge  Ge20  1  0.942  0.058  0.750  1.0
  Ge  Ge21  1  0.515  0.917  0.466  1.0
[/CIF]
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The structure described by Pr2(ZnGe2)3 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 14-coordinate geometry to two equivalent Zn(2), four equivalent Zn(1), two equivalent Ge(2), two equivalent Ge(3), and four equivalent Ge(1) atoms. In the second Pr site, Pr(2) is bonded in a 14-coordinate geometry to two equivalent Zn(2), four equivalent Zn(1), two equivalent Ge(2), two equivalent Ge(3), and four equivalent Ge(1) atoms. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent Pr(1), two equivalent Pr(2), two equivalent Ge(2), and two equivalent Ge(3) atoms to form a mixture of distorted face and edge-sharing ZnPr4Ge4 tetrahedra. In the second Zn site, Zn(2) is bonded in a 5-coordinate geometry to two equivalent Pr(1), two equivalent Pr(2), one Ge(2), and four equivalent Ge(1) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 6-coordinate geometry to one Pr(1), one Pr(2), one Zn(2), and three equivalent Ge(1) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Pr(1), two equivalent Pr(2), one Zn(2), and four equivalent Zn(1) atoms. In the third Ge site, Ge(3) is bonded in a 8-coordinate geometry to two equivalent Pr(1), two equivalent Pr(2), and four equivalent Zn(1) atoms. is represented by the CIF file [CIF]
data_Pr2(ZnGe2)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.821
_cell_length_b   12.821
_cell_length_c   5.990
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   152.941
_symmetry_Int_Tables_number   1
_cell_volume   447.943
_cell_formula_units_Z   2
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  0.394  0.606  0.750  1.0
  Pr  Pr1  1  0.606  0.394  0.250  1.0
  Pr  Pr2  1  0.894  0.106  0.250  1.0
  Pr  Pr3  1  0.106  0.894  0.750  1.0
  Zn  Zn4  1  0.735  0.735  0.000  1.0
  Zn  Zn5  1  0.840  0.160  0.750  1.0
  Zn  Zn6  1  0.735  0.735  0.500  1.0
  Zn  Zn7  1  0.265  0.265  0.000  1.0
  Zn  Zn8  1  0.160  0.840  0.250  1.0
  Zn  Zn9  1  0.265  0.265  0.500  1.0
  Ge  Ge10  1  0.083  0.485  0.034  1.0
  Ge  Ge11  1  0.917  0.515  0.534  1.0
  Ge  Ge12  1  0.515  0.917  0.034  1.0
  Ge  Ge13  1  0.485  0.083  0.534  1.0
  Ge  Ge14  1  0.917  0.515  0.966  1.0
  Ge  Ge15  1  0.083  0.485  0.466  1.0
  Ge  Ge16  1  0.485  0.083  0.966  1.0
  Ge  Ge17  1  0.058  0.942  0.250  1.0
  Ge  Ge18  1  0.569  0.431  0.750  1.0
  Ge  Ge19  1  0.431  0.569  0.250  1.0
  Ge  Ge20  1  0.942  0.058  0.750  1.0
  Ge  Ge21  1  0.515  0.917  0.466  1.0
[/CIF]
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