The structure described by Pr3Zn2As6 crystallizes in the orthorhombic Pmmn space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 10-coordinate geometry to two equivalent Zn(1), two equivalent As(1), two equivalent As(2), and four equivalent As(4) atoms. In the second Pr site, Pr(2) is bonded in a 8-coordinate geometry to one As(1), two equivalent As(3), two equivalent As(4), and three equivalent As(2) atoms. Zn(1) is bonded to one Pr(1), one As(3), and three equivalent As(4) atoms to form a mixture of distorted corner and edge-sharing ZnPrAs4 tetrahedra. There are four inequivalent As sites. In the first As site, As(1) is bonded in a 8-coordinate geometry to two equivalent Pr(1), two equivalent Pr(2), and four equivalent As(2) atoms. In the second As site, As(2) is bonded in a 8-coordinate geometry to one Pr(1), three equivalent Pr(2), two equivalent As(1), and two equivalent As(2) atoms. In the third As site, As(3) is bonded in a 6-coordinate geometry to four equivalent Pr(2) and two equivalent Zn(1) atoms. In the fourth As site, As(4) is bonded in a 7-coordinate geometry to two equivalent Pr(1), two equivalent Pr(2), and three equivalent Zn(1) atoms. is represented by the CIF file [CIF]
data_Pr3(ZnAs3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.125
_cell_length_b   10.265
_cell_length_c   11.954
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   506.244
_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  0.750  0.264  0.750  1.0
  Pr  Pr1  1  0.750  0.269  0.414  1.0
  Pr  Pr2  1  0.250  0.731  0.914  1.0
  Pr  Pr3  1  0.250  0.731  0.586  1.0
  Pr  Pr4  1  0.250  0.736  0.250  1.0
  Pr  Pr5  1  0.750  0.269  0.086  1.0
  Zn  Zn6  1  0.250  0.003  0.096  1.0
  Zn  Zn7  1  0.250  0.003  0.404  1.0
  Zn  Zn8  1  0.750  0.997  0.596  1.0
  Zn  Zn9  1  0.750  0.997  0.904  1.0
  As  As10  1  0.750  0.502  0.250  1.0
  As  As11  1  0.750  0.498  0.916  1.0
  As  As12  1  0.750  0.837  0.750  1.0
  As  As13  1  0.750  0.845  0.419  1.0
  As  As14  1  0.250  0.155  0.919  1.0
  As  As15  1  0.250  0.155  0.581  1.0
  As  As16  1  0.250  0.163  0.250  1.0
  As  As17  1  0.250  0.502  0.084  1.0
  As  As18  1  0.250  0.498  0.750  1.0
  As  As19  1  0.250  0.502  0.416  1.0
  As  As20  1  0.750  0.498  0.584  1.0
  As  As21  1  0.750  0.845  0.081  1.0
[/CIF]
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The structure described by Pr3Zn2As6 crystallizes in the orthorhombic Pmmn space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 10-coordinate geometry to two equivalent Zn(1), two equivalent As(1), two equivalent As(2), and four equivalent As(4) atoms. In the second Pr site, Pr(2) is bonded in a 8-coordinate geometry to one As(1), two equivalent As(3), two equivalent As(4), and three equivalent As(2) atoms. Zn(1) is bonded to one Pr(1), one As(3), and three equivalent As(4) atoms to form a mixture of distorted corner and edge-sharing ZnPrAs4 tetrahedra. There are four inequivalent As sites. In the first As site, As(1) is bonded in a 8-coordinate geometry to two equivalent Pr(1), two equivalent Pr(2), and four equivalent As(2) atoms. In the second As site, As(2) is bonded in a 8-coordinate geometry to one Pr(1), three equivalent Pr(2), two equivalent As(1), and two equivalent As(2) atoms. In the third As site, As(3) is bonded in a 6-coordinate geometry to four equivalent Pr(2) and two equivalent Zn(1) atoms. In the fourth As site, As(4) is bonded in a 7-coordinate geometry to two equivalent Pr(1), two equivalent Pr(2), and three equivalent Zn(1) atoms. is represented by the CIF file [CIF]
data_Pr3(ZnAs3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.125
_cell_length_b   10.265
_cell_length_c   11.954
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   506.244
_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  0.750  0.264  0.750  1.0
  Pr  Pr1  1  0.750  0.269  0.414  1.0
  Pr  Pr2  1  0.250  0.731  0.914  1.0
  Pr  Pr3  1  0.250  0.731  0.586  1.0
  Pr  Pr4  1  0.250  0.736  0.250  1.0
  Pr  Pr5  1  0.750  0.269  0.086  1.0
  Zn  Zn6  1  0.250  0.003  0.096  1.0
  Zn  Zn7  1  0.250  0.003  0.404  1.0
  Zn  Zn8  1  0.750  0.997  0.596  1.0
  Zn  Zn9  1  0.750  0.997  0.904  1.0
  As  As10  1  0.750  0.502  0.250  1.0
  As  As11  1  0.750  0.498  0.916  1.0
  As  As12  1  0.750  0.837  0.750  1.0
  As  As13  1  0.750  0.845  0.419  1.0
  As  As14  1  0.250  0.155  0.919  1.0
  As  As15  1  0.250  0.155  0.581  1.0
  As  As16  1  0.250  0.163  0.250  1.0
  As  As17  1  0.250  0.502  0.084  1.0
  As  As18  1  0.250  0.498  0.750  1.0
  As  As19  1  0.250  0.502  0.416  1.0
  As  As20  1  0.750  0.498  0.584  1.0
  As  As21  1  0.750  0.845  0.081  1.0
[/CIF]
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