The material described by Pr2AgAl3 crystallizes in the orthorhombic Pmm2 space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to four equivalent Ag(1), two equivalent Al(1), two equivalent Al(2), and four equivalent Al(3) atoms to form PrAl8Ag4 cuboctahedra that share edges with four equivalent Pr(1)Al8Ag4 cuboctahedra, edges with eight equivalent Pr(2)Al10Ag2 cuboctahedra, faces with four equivalent Pr(2)Al10Ag2 cuboctahedra, and faces with four equivalent Pr(1)Al8Ag4 cuboctahedra. In the second Pr site, Pr(2) is bonded to two equivalent Ag(1), two equivalent Al(3), four equivalent Al(1), and four equivalent Al(2) atoms to form PrAl10Ag2 cuboctahedra that share edges with four equivalent Pr(2)Al10Ag2 cuboctahedra, edges with eight equivalent Pr(1)Al8Ag4 cuboctahedra, faces with four equivalent Pr(2)Al10Ag2 cuboctahedra, and faces with four equivalent Pr(1)Al8Ag4 cuboctahedra. Ag(1) is bonded in a 9-coordinate geometry to two equivalent Pr(2), four equivalent Pr(1), one Al(3), and two equivalent Al(2) atoms. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a 9-coordinate geometry to two equivalent Pr(1), four equivalent Pr(2), one Al(2), and two equivalent Al(3) atoms. In the second Al site, Al(2) is bonded in a 9-coordinate geometry to two equivalent Pr(1), four equivalent Pr(2), two equivalent Ag(1), and one Al(1) atom. In the third Al site, Al(3) is bonded in a 9-coordinate geometry to two equivalent Pr(2), four equivalent Pr(1), one Ag(1), and two equivalent Al(1) atoms. is represented by the CIF file [CIF]
data_Pr2Al3Ag
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.816
_cell_length_b   4.641
_cell_length_c   8.076
_cell_angle_alpha   90.003
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   143.034
_cell_formula_units_Z   1
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  1.000  0.992  1.0
  Pr  Pr1  1  0.000  0.500  0.507  1.0
  Al  Al2  1  0.500  1.000  0.664  1.0
  Al  Al3  1  0.500  0.000  0.334  1.0
  Al  Al4  1  0.500  0.500  0.834  1.0
  Ag  Ag5  1  0.500  0.500  0.169  1.0
[/CIF]
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The material described by Pr2AgAl3 crystallizes in the orthorhombic Pmm2 space group. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to four equivalent Ag(1), two equivalent Al(1), two equivalent Al(2), and four equivalent Al(3) atoms to form PrAl8Ag4 cuboctahedra that share edges with four equivalent Pr(1)Al8Ag4 cuboctahedra, edges with eight equivalent Pr(2)Al10Ag2 cuboctahedra, faces with four equivalent Pr(2)Al10Ag2 cuboctahedra, and faces with four equivalent Pr(1)Al8Ag4 cuboctahedra. In the second Pr site, Pr(2) is bonded to two equivalent Ag(1), two equivalent Al(3), four equivalent Al(1), and four equivalent Al(2) atoms to form PrAl10Ag2 cuboctahedra that share edges with four equivalent Pr(2)Al10Ag2 cuboctahedra, edges with eight equivalent Pr(1)Al8Ag4 cuboctahedra, faces with four equivalent Pr(2)Al10Ag2 cuboctahedra, and faces with four equivalent Pr(1)Al8Ag4 cuboctahedra. Ag(1) is bonded in a 9-coordinate geometry to two equivalent Pr(2), four equivalent Pr(1), one Al(3), and two equivalent Al(2) atoms. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a 9-coordinate geometry to two equivalent Pr(1), four equivalent Pr(2), one Al(2), and two equivalent Al(3) atoms. In the second Al site, Al(2) is bonded in a 9-coordinate geometry to two equivalent Pr(1), four equivalent Pr(2), two equivalent Ag(1), and one Al(1) atom. In the third Al site, Al(3) is bonded in a 9-coordinate geometry to two equivalent Pr(2), four equivalent Pr(1), one Ag(1), and two equivalent Al(1) atoms. is represented by the CIF file [CIF]
data_Pr2Al3Ag
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.816
_cell_length_b   4.641
_cell_length_c   8.076
_cell_angle_alpha   90.003
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   143.034
_cell_formula_units_Z   1
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  1.000  0.992  1.0
  Pr  Pr1  1  0.000  0.500  0.507  1.0
  Al  Al2  1  0.500  1.000  0.664  1.0
  Al  Al3  1  0.500  0.000  0.334  1.0
  Al  Al4  1  0.500  0.500  0.834  1.0
  Ag  Ag5  1  0.500  0.500  0.169  1.0
[/CIF]
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