The crystal structure described by PrNi9In2 crystallizes in the tetragonal P4/mbm space group. Pr(1) is bonded in a 20-coordinate geometry to eight equivalent Ni(2), eight equivalent Ni(3), and four equivalent In(1) atoms. There are three inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to four equivalent Ni(2), four equivalent Ni(3), and four equivalent In(1) atoms to form NiIn4Ni8 cuboctahedra that share corners with four equivalent Ni(3)Pr2In3Ni7 cuboctahedra, corners with twelve equivalent Ni(2)Pr2In2Ni8 cuboctahedra, edges with two equivalent Ni(1)In4Ni8 cuboctahedra, faces with eight equivalent Ni(2)Pr2In2Ni8 cuboctahedra, and faces with twelve equivalent Ni(3)Pr2In3Ni7 cuboctahedra. In the second Ni site, Ni(2) is bonded to two equivalent Pr(1), one Ni(1), three equivalent Ni(2), four equivalent Ni(3), and two equivalent In(1) atoms to form distorted NiPr2In2Ni8 cuboctahedra that share corners with three equivalent Ni(1)In4Ni8 cuboctahedra, corners with six equivalent Ni(3)Pr2In3Ni7 cuboctahedra, corners with eleven equivalent Ni(2)Pr2In2Ni8 cuboctahedra, edges with two equivalent Ni(2)Pr2In2Ni8 cuboctahedra, edges with four equivalent Ni(3)Pr2In3Ni7 cuboctahedra, faces with two equivalent Ni(1)In4Ni8 cuboctahedra, faces with seven equivalent Ni(2)Pr2In2Ni8 cuboctahedra, and faces with ten equivalent Ni(3)Pr2In3Ni7 cuboctahedra. In the third Ni site, Ni(3) is bonded to two equivalent Pr(1), one Ni(1), two equivalent Ni(3), four equivalent Ni(2), and three equivalent In(1) atoms to form NiPr2In3Ni7 cuboctahedra that share  a cornercorner with one Ni(1)In4Ni8 cuboctahedra, corners with six equivalent Ni(2)Pr2In2Ni8 cuboctahedra, corners with eleven equivalent Ni(3)Pr2In3Ni7 cuboctahedra, edges with four equivalent Ni(2)Pr2In2Ni8 cuboctahedra, edges with five equivalent Ni(3)Pr2In3Ni7 cuboctahedra, faces with three equivalent Ni(1)In4Ni8 cuboctahedra, faces with seven equivalent Ni(3)Pr2In3Ni7 cuboctahedra, and faces with ten equivalent Ni(2)Pr2In2Ni8 cuboctahedra. In(1) is bonded in a 15-coordinate geometry to two equivalent Pr(1), two equivalent Ni(1), four equivalent Ni(2), six equivalent Ni(3), and one In(1) atom. is represented by the CIF file [CIF]
data_PrIn2Ni9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.219
_cell_length_b   8.219
_cell_length_c   4.862
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   328.418
_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  0.500  0.500  0.000  1.0
  Pr  Pr1  1  0.000  0.000  0.000  1.0
  In  In2  1  0.124  0.624  0.000  1.0
  In  In3  1  0.876  0.376  0.000  1.0
  In  In4  1  0.376  0.124  0.000  1.0
  In  In5  1  0.624  0.876  0.000  1.0
  Ni  Ni6  1  0.000  0.500  0.500  1.0
  Ni  Ni7  1  0.500  0.000  0.500  1.0
  Ni  Ni8  1  0.566  0.710  0.500  1.0
  Ni  Ni9  1  0.434  0.290  0.500  1.0
  Ni  Ni10  1  0.934  0.210  0.500  1.0
  Ni  Ni11  1  0.066  0.790  0.500  1.0
  Ni  Ni12  1  0.710  0.434  0.500  1.0
  Ni  Ni13  1  0.290  0.566  0.500  1.0
  Ni  Ni14  1  0.210  0.066  0.500  1.0
  Ni  Ni15  1  0.790  0.934  0.500  1.0
  Ni  Ni16  1  0.324  0.824  0.746  1.0
  Ni  Ni17  1  0.676  0.176  0.746  1.0
  Ni  Ni18  1  0.176  0.324  0.746  1.0
  Ni  Ni19  1  0.824  0.676  0.746  1.0
  Ni  Ni20  1  0.676  0.176  0.254  1.0
  Ni  Ni21  1  0.324  0.824  0.254  1.0
  Ni  Ni22  1  0.824  0.676  0.254  1.0
  Ni  Ni23  1  0.176  0.324  0.254  1.0
[/CIF]
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The crystal structure described by PrNi9In2 crystallizes in the tetragonal P4/mbm space group. Pr(1) is bonded in a 20-coordinate geometry to eight equivalent Ni(2), eight equivalent Ni(3), and four equivalent In(1) atoms. There are three inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to four equivalent Ni(2), four equivalent Ni(3), and four equivalent In(1) atoms to form NiIn4Ni8 cuboctahedra that share corners with four equivalent Ni(3)Pr2In3Ni7 cuboctahedra, corners with twelve equivalent Ni(2)Pr2In2Ni8 cuboctahedra, edges with two equivalent Ni(1)In4Ni8 cuboctahedra, faces with eight equivalent Ni(2)Pr2In2Ni8 cuboctahedra, and faces with twelve equivalent Ni(3)Pr2In3Ni7 cuboctahedra. In the second Ni site, Ni(2) is bonded to two equivalent Pr(1), one Ni(1), three equivalent Ni(2), four equivalent Ni(3), and two equivalent In(1) atoms to form distorted NiPr2In2Ni8 cuboctahedra that share corners with three equivalent Ni(1)In4Ni8 cuboctahedra, corners with six equivalent Ni(3)Pr2In3Ni7 cuboctahedra, corners with eleven equivalent Ni(2)Pr2In2Ni8 cuboctahedra, edges with two equivalent Ni(2)Pr2In2Ni8 cuboctahedra, edges with four equivalent Ni(3)Pr2In3Ni7 cuboctahedra, faces with two equivalent Ni(1)In4Ni8 cuboctahedra, faces with seven equivalent Ni(2)Pr2In2Ni8 cuboctahedra, and faces with ten equivalent Ni(3)Pr2In3Ni7 cuboctahedra. In the third Ni site, Ni(3) is bonded to two equivalent Pr(1), one Ni(1), two equivalent Ni(3), four equivalent Ni(2), and three equivalent In(1) atoms to form NiPr2In3Ni7 cuboctahedra that share  a cornercorner with one Ni(1)In4Ni8 cuboctahedra, corners with six equivalent Ni(2)Pr2In2Ni8 cuboctahedra, corners with eleven equivalent Ni(3)Pr2In3Ni7 cuboctahedra, edges with four equivalent Ni(2)Pr2In2Ni8 cuboctahedra, edges with five equivalent Ni(3)Pr2In3Ni7 cuboctahedra, faces with three equivalent Ni(1)In4Ni8 cuboctahedra, faces with seven equivalent Ni(3)Pr2In3Ni7 cuboctahedra, and faces with ten equivalent Ni(2)Pr2In2Ni8 cuboctahedra. In(1) is bonded in a 15-coordinate geometry to two equivalent Pr(1), two equivalent Ni(1), four equivalent Ni(2), six equivalent Ni(3), and one In(1) atom. is represented by the CIF file [CIF]
data_PrIn2Ni9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.219
_cell_length_b   8.219
_cell_length_c   4.862
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   328.418
_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  0.500  0.500  0.000  1.0
  Pr  Pr1  1  0.000  0.000  0.000  1.0
  In  In2  1  0.124  0.624  0.000  1.0
  In  In3  1  0.876  0.376  0.000  1.0
  In  In4  1  0.376  0.124  0.000  1.0
  In  In5  1  0.624  0.876  0.000  1.0
  Ni  Ni6  1  0.000  0.500  0.500  1.0
  Ni  Ni7  1  0.500  0.000  0.500  1.0
  Ni  Ni8  1  0.566  0.710  0.500  1.0
  Ni  Ni9  1  0.434  0.290  0.500  1.0
  Ni  Ni10  1  0.934  0.210  0.500  1.0
  Ni  Ni11  1  0.066  0.790  0.500  1.0
  Ni  Ni12  1  0.710  0.434  0.500  1.0
  Ni  Ni13  1  0.290  0.566  0.500  1.0
  Ni  Ni14  1  0.210  0.066  0.500  1.0
  Ni  Ni15  1  0.790  0.934  0.500  1.0
  Ni  Ni16  1  0.324  0.824  0.746  1.0
  Ni  Ni17  1  0.676  0.176  0.746  1.0
  Ni  Ni18  1  0.176  0.324  0.746  1.0
  Ni  Ni19  1  0.824  0.676  0.746  1.0
  Ni  Ni20  1  0.676  0.176  0.254  1.0
  Ni  Ni21  1  0.324  0.824  0.254  1.0
  Ni  Ni22  1  0.824  0.676  0.254  1.0
  Ni  Ni23  1  0.176  0.324  0.254  1.0
[/CIF]
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