data_PrUAs2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.09
_cell_length_b   5.09
_cell_length_c   5.09
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   PrUAs2
_chemical_formula_sum   'Pr1 U1 As2'
_cell_volume   93.36
_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  Pr2  1  0.0  0.0  0.0  1.0
  U  U3  1  0.6  0.6  0.6  1.0
  As  As0  1  0.8  0.8  0.8  1.0
  As  As1  1  0.4  0.4  0.4  1.0

data_PrUAs2
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.09
_cell_length_b   5.09
_cell_length_c   12.47
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   PrUAs2
_chemical_formula_sum   'Pr3 U3 As6'
_cell_volume   280.09
_cell_formula_units_Z   3
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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  3  0.0  0.0  0.0  1.0
  U  U1  3  0.0  0.0  0.4  1.0
  As  As2  3  0.0  0.0  0.2  1.0
  As  As3  3  0.0  0.0  0.6  1.0

Pr U As As
Pr U As As 0 2 - - - 0 2 - - o 0 2 o - - 0 2 - o - 0 1 - - o 0 1 - o - 0 1 o - - 0 3 - o o 0 3 o - o 0 3 o o - 1 3 o o o 1 3 o + o 1 3 + o o 1 3 o o + 1 2 o o o 2 3 o o + 2 3 o + o 2 3 + o o 
UPrAs2 crystallizes in the trigonal R3m space group. U(1) is bonded in a distorted linear geometry to one As(1) and one As(2) atom. The U(1)-As(1) bond length is 2.49 Å. The U(1)-As(2) bond length is 2.49 Å. Pr(1) is bonded in a 1-coordinate geometry to one As(1) and three equivalent As(2) atoms. The Pr(1)-As(1) bond length is 2.49 Å. All Pr(1)-As(2) bond lengths are 3.06 Å. There are two inequivalent As sites. In the first As site, As(1) is bonded in a linear geometry to one U(1) and one Pr(1) atom. In the second As site, As(2) is bonded in a 4-coordinate geometry to one U(1) and three equivalent Pr(1) atoms.