The material described by Pr3CrS6 crystallizes in the orthorhombic Pnnm space group. There are three inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 8-coordinate geometry to one S(4), one S(6), two equivalent S(1), two equivalent S(2), and two equivalent S(5) atoms. In the second Pr site, Pr(2) is bonded in a 9-coordinate geometry to one S(1), one S(4), one S(5), two equivalent S(2), two equivalent S(3), and two equivalent S(6) atoms. In the third Pr site, Pr(3) is bonded to one S(1), one S(2), one S(4), two equivalent S(3), and two equivalent S(5) atoms to form distorted PrS7 pentagonal bipyramids that share  a cornercorner with one Cr(2)S6 octahedra, edges with two equivalent Cr(1)S6 octahedra, and edges with two equivalent Pr(3)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 28°. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to two equivalent S(3) and four equivalent S(4) atoms to form CrS6 octahedra that share edges with two equivalent Cr(1)S6 octahedra and edges with four equivalent Pr(3)S7 pentagonal bipyramids. In the second Cr site, Cr(2) is bonded to two equivalent S(1) and four equivalent S(6) atoms to form CrS6 octahedra that share corners with two equivalent Pr(3)S7 pentagonal bipyramids and edges with two equivalent Cr(2)S6 octahedra. There are six inequivalent S sites. In the first S site, S(5) is bonded to one Pr(2), two equivalent Pr(1), and two equivalent Pr(3) atoms to form distorted SPr5 trigonal bipyramids that share  a cornercorner with one S(4)Pr3Cr2 trigonal bipyramid, corners with two equivalent S(2)Pr5 trigonal bipyramids, corners with four equivalent S(3)Pr4Cr trigonal bipyramids,  an edgeedge with one S(3)Pr4Cr trigonal bipyramid, edges with two equivalent S(4)Pr3Cr2 trigonal bipyramids, edges with two equivalent S(6)Pr3Cr2 trigonal bipyramids, edges with two equivalent S(5)Pr5 trigonal bipyramids, and edges with three equivalent S(2)Pr5 trigonal bipyramids. In the second S site, S(6) is bonded to one Pr(1), two equivalent Pr(2), and two equivalent Cr(2) atoms to form distorted SPr3Cr2 trigonal bipyramids that share corners with two equivalent S(6)Pr3Cr2 trigonal bipyramids, corners with two equivalent S(3)Pr4Cr trigonal bipyramids, corners with three equivalent S(4)Pr3Cr2 trigonal bipyramids, corners with four equivalent S(2)Pr5 trigonal bipyramids,  an edgeedge with one S(3)Pr4Cr trigonal bipyramid,  an edgeedge with one S(2)Pr5 trigonal bipyramid, edges with two equivalent S(5)Pr5 trigonal bipyramids, and edges with three equivalent S(6)Pr3Cr2 trigonal bipyramids. In the third S site, S(1) is bonded in a 4-coordinate geometry to one Pr(2), one Pr(3), two equivalent Pr(1), and one Cr(2) atom. In the fourth S site, S(2) is bonded to one Pr(3), two equivalent Pr(1), and two equivalent Pr(2) atoms to form SPr5 trigonal bipyramids that share  a cornercorner with one S(4)Pr3Cr2 trigonal bipyramid, corners with two equivalent S(5)Pr5 trigonal bipyramids, corners with four equivalent S(6)Pr3Cr2 trigonal bipyramids, corners with four equivalent S(3)Pr4Cr trigonal bipyramids,  an edgeedge with one S(6)Pr3Cr2 trigonal bipyramid,  an edgeedge with one S(3)Pr4Cr trigonal bipyramid, edges with two equivalent S(4)Pr3Cr2 trigonal bipyramids, edges with two equivalent S(2)Pr5 trigonal bipyramids, and edges with three equivalent S(5)Pr5 trigonal bipyramids. In the fifth S site, S(3) is bonded to two equivalent Pr(2), two equivalent Pr(3), and one Cr(1) atom to form distorted SPr4Cr trigonal bipyramids that share  a cornercorner with one S(3)Pr4Cr trigonal bipyramid, corners with two equivalent S(6)Pr3Cr2 trigonal bipyramids, corners with four equivalent S(2)Pr5 trigonal bipyramids, corners with four equivalent S(5)Pr5 trigonal bipyramids,  an edgeedge with one S(6)Pr3Cr2 trigonal bipyramid,  an edgeedge with one S(2)Pr5 trigonal bipyramid,  an edgeedge with one S(5)Pr5 trigonal bipyramid, edges with two equivalent S(3)Pr4Cr trigonal bipyramids, and edges with four equivalent S(4)Pr3Cr2 trigonal bipyramids. In the sixth S site, S(4) is bonded to one Pr(1), one Pr(2), one Pr(3), and two equivalent Cr(1) atoms to form distorted SPr3Cr2 trigonal bipyramids that share  a cornercorner with one S(2)Pr5 trigonal bipyramid,  a cornercorner with one S(5)Pr5 trigonal bipyramid, corners with three equivalent S(6)Pr3Cr2 trigonal bipyramids, corners with four equivalent S(4)Pr3Cr2 trigonal bipyramids,  an edgeedge with one S(4)Pr3Cr2 trigonal bipyramid, edges with two equivalent S(2)Pr5 trigonal bipyramids, edges with two equivalent S(5)Pr5 trigonal bipyramids, and edges with four equivalent S(3)Pr4Cr trigonal bipyramids. is represented by the CIF file [CIF]
data_Pr3CrS6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.924
_cell_length_b   13.775
_cell_length_c   16.328
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   882.678
_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  0.000  0.553  0.282  1.0
  Pr  Pr1  1  0.000  0.447  0.718  1.0
  Pr  Pr2  1  0.500  0.947  0.782  1.0
  Pr  Pr3  1  0.500  0.053  0.218  1.0
  Pr  Pr4  1  0.000  0.760  0.096  1.0
  Pr  Pr5  1  0.000  0.240  0.904  1.0
  Pr  Pr6  1  0.500  0.740  0.596  1.0
  Pr  Pr7  1  0.500  0.260  0.404  1.0
  Pr  Pr8  1  0.000  0.321  0.148  1.0
  Pr  Pr9  1  0.000  0.679  0.852  1.0
  Pr  Pr10  1  0.500  0.179  0.648  1.0
  Pr  Pr11  1  0.500  0.821  0.352  1.0
  Cr  Cr12  1  0.000  0.000  0.500  1.0
  Cr  Cr13  1  0.500  0.500  0.000  1.0
  Cr  Cr14  1  0.000  0.000  0.000  1.0
  Cr  Cr15  1  0.500  0.500  0.500  1.0
  S  S16  1  0.000  0.123  0.101  1.0
  S  S17  1  0.000  0.877  0.899  1.0
  S  S18  1  0.500  0.377  0.601  1.0
  S  S19  1  0.500  0.623  0.399  1.0
  S  S20  1  0.000  0.190  0.290  1.0
  S  S21  1  0.000  0.810  0.710  1.0
  S  S22  1  0.500  0.310  0.790  1.0
  S  S23  1  0.500  0.690  0.210  1.0
  S  S24  1  0.000  0.175  0.520  1.0
  S  S25  1  0.000  0.825  0.480  1.0
  S  S26  1  0.500  0.325  0.020  1.0
  S  S27  1  0.500  0.675  0.980  1.0
  S  S28  1  0.000  0.524  0.095  1.0
  S  S29  1  0.000  0.476  0.905  1.0
  S  S30  1  0.500  0.976  0.595  1.0
  S  S31  1  0.500  0.024  0.405  1.0
  S  S32  1  0.000  0.100  0.755  1.0
  S  S33  1  0.000  0.900  0.245  1.0
  S  S34  1  0.500  0.400  0.255  1.0
  S  S35  1  0.500  0.600  0.745  1.0
  S  S36  1  0.000  0.422  0.428  1.0
  S  S37  1  0.000  0.578  0.572  1.0
  S  S38  1  0.500  0.078  0.928  1.0
  S  S39  1  0.500  0.922  0.072  1.0
[/CIF]
.
The material described by Pr3CrS6 crystallizes in the orthorhombic Pnnm space group. There are three inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 8-coordinate geometry to one S(4), one S(6), two equivalent S(1), two equivalent S(2), and two equivalent S(5) atoms. In the second Pr site, Pr(2) is bonded in a 9-coordinate geometry to one S(1), one S(4), one S(5), two equivalent S(2), two equivalent S(3), and two equivalent S(6) atoms. In the third Pr site, Pr(3) is bonded to one S(1), one S(2), one S(4), two equivalent S(3), and two equivalent S(5) atoms to form distorted PrS7 pentagonal bipyramids that share  a cornercorner with one Cr(2)S6 octahedra, edges with two equivalent Cr(1)S6 octahedra, and edges with two equivalent Pr(3)S7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 28°. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to two equivalent S(3) and four equivalent S(4) atoms to form CrS6 octahedra that share edges with two equivalent Cr(1)S6 octahedra and edges with four equivalent Pr(3)S7 pentagonal bipyramids. In the second Cr site, Cr(2) is bonded to two equivalent S(1) and four equivalent S(6) atoms to form CrS6 octahedra that share corners with two equivalent Pr(3)S7 pentagonal bipyramids and edges with two equivalent Cr(2)S6 octahedra. There are six inequivalent S sites. In the first S site, S(5) is bonded to one Pr(2), two equivalent Pr(1), and two equivalent Pr(3) atoms to form distorted SPr5 trigonal bipyramids that share  a cornercorner with one S(4)Pr3Cr2 trigonal bipyramid, corners with two equivalent S(2)Pr5 trigonal bipyramids, corners with four equivalent S(3)Pr4Cr trigonal bipyramids,  an edgeedge with one S(3)Pr4Cr trigonal bipyramid, edges with two equivalent S(4)Pr3Cr2 trigonal bipyramids, edges with two equivalent S(6)Pr3Cr2 trigonal bipyramids, edges with two equivalent S(5)Pr5 trigonal bipyramids, and edges with three equivalent S(2)Pr5 trigonal bipyramids. In the second S site, S(6) is bonded to one Pr(1), two equivalent Pr(2), and two equivalent Cr(2) atoms to form distorted SPr3Cr2 trigonal bipyramids that share corners with two equivalent S(6)Pr3Cr2 trigonal bipyramids, corners with two equivalent S(3)Pr4Cr trigonal bipyramids, corners with three equivalent S(4)Pr3Cr2 trigonal bipyramids, corners with four equivalent S(2)Pr5 trigonal bipyramids,  an edgeedge with one S(3)Pr4Cr trigonal bipyramid,  an edgeedge with one S(2)Pr5 trigonal bipyramid, edges with two equivalent S(5)Pr5 trigonal bipyramids, and edges with three equivalent S(6)Pr3Cr2 trigonal bipyramids. In the third S site, S(1) is bonded in a 4-coordinate geometry to one Pr(2), one Pr(3), two equivalent Pr(1), and one Cr(2) atom. In the fourth S site, S(2) is bonded to one Pr(3), two equivalent Pr(1), and two equivalent Pr(2) atoms to form SPr5 trigonal bipyramids that share  a cornercorner with one S(4)Pr3Cr2 trigonal bipyramid, corners with two equivalent S(5)Pr5 trigonal bipyramids, corners with four equivalent S(6)Pr3Cr2 trigonal bipyramids, corners with four equivalent S(3)Pr4Cr trigonal bipyramids,  an edgeedge with one S(6)Pr3Cr2 trigonal bipyramid,  an edgeedge with one S(3)Pr4Cr trigonal bipyramid, edges with two equivalent S(4)Pr3Cr2 trigonal bipyramids, edges with two equivalent S(2)Pr5 trigonal bipyramids, and edges with three equivalent S(5)Pr5 trigonal bipyramids. In the fifth S site, S(3) is bonded to two equivalent Pr(2), two equivalent Pr(3), and one Cr(1) atom to form distorted SPr4Cr trigonal bipyramids that share  a cornercorner with one S(3)Pr4Cr trigonal bipyramid, corners with two equivalent S(6)Pr3Cr2 trigonal bipyramids, corners with four equivalent S(2)Pr5 trigonal bipyramids, corners with four equivalent S(5)Pr5 trigonal bipyramids,  an edgeedge with one S(6)Pr3Cr2 trigonal bipyramid,  an edgeedge with one S(2)Pr5 trigonal bipyramid,  an edgeedge with one S(5)Pr5 trigonal bipyramid, edges with two equivalent S(3)Pr4Cr trigonal bipyramids, and edges with four equivalent S(4)Pr3Cr2 trigonal bipyramids. In the sixth S site, S(4) is bonded to one Pr(1), one Pr(2), one Pr(3), and two equivalent Cr(1) atoms to form distorted SPr3Cr2 trigonal bipyramids that share  a cornercorner with one S(2)Pr5 trigonal bipyramid,  a cornercorner with one S(5)Pr5 trigonal bipyramid, corners with three equivalent S(6)Pr3Cr2 trigonal bipyramids, corners with four equivalent S(4)Pr3Cr2 trigonal bipyramids,  an edgeedge with one S(4)Pr3Cr2 trigonal bipyramid, edges with two equivalent S(2)Pr5 trigonal bipyramids, edges with two equivalent S(5)Pr5 trigonal bipyramids, and edges with four equivalent S(3)Pr4Cr trigonal bipyramids. is represented by the CIF file [CIF]
data_Pr3CrS6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.924
_cell_length_b   13.775
_cell_length_c   16.328
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   882.678
_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  0.000  0.553  0.282  1.0
  Pr  Pr1  1  0.000  0.447  0.718  1.0
  Pr  Pr2  1  0.500  0.947  0.782  1.0
  Pr  Pr3  1  0.500  0.053  0.218  1.0
  Pr  Pr4  1  0.000  0.760  0.096  1.0
  Pr  Pr5  1  0.000  0.240  0.904  1.0
  Pr  Pr6  1  0.500  0.740  0.596  1.0
  Pr  Pr7  1  0.500  0.260  0.404  1.0
  Pr  Pr8  1  0.000  0.321  0.148  1.0
  Pr  Pr9  1  0.000  0.679  0.852  1.0
  Pr  Pr10  1  0.500  0.179  0.648  1.0
  Pr  Pr11  1  0.500  0.821  0.352  1.0
  Cr  Cr12  1  0.000  0.000  0.500  1.0
  Cr  Cr13  1  0.500  0.500  0.000  1.0
  Cr  Cr14  1  0.000  0.000  0.000  1.0
  Cr  Cr15  1  0.500  0.500  0.500  1.0
  S  S16  1  0.000  0.123  0.101  1.0
  S  S17  1  0.000  0.877  0.899  1.0
  S  S18  1  0.500  0.377  0.601  1.0
  S  S19  1  0.500  0.623  0.399  1.0
  S  S20  1  0.000  0.190  0.290  1.0
  S  S21  1  0.000  0.810  0.710  1.0
  S  S22  1  0.500  0.310  0.790  1.0
  S  S23  1  0.500  0.690  0.210  1.0
  S  S24  1  0.000  0.175  0.520  1.0
  S  S25  1  0.000  0.825  0.480  1.0
  S  S26  1  0.500  0.325  0.020  1.0
  S  S27  1  0.500  0.675  0.980  1.0
  S  S28  1  0.000  0.524  0.095  1.0
  S  S29  1  0.000  0.476  0.905  1.0
  S  S30  1  0.500  0.976  0.595  1.0
  S  S31  1  0.500  0.024  0.405  1.0
  S  S32  1  0.000  0.100  0.755  1.0
  S  S33  1  0.000  0.900  0.245  1.0
  S  S34  1  0.500  0.400  0.255  1.0
  S  S35  1  0.500  0.600  0.745  1.0
  S  S36  1  0.000  0.422  0.428  1.0
  S  S37  1  0.000  0.578  0.572  1.0
  S  S38  1  0.500  0.078  0.928  1.0
  S  S39  1  0.500  0.922  0.072  1.0
[/CIF]
.