data_PrEr2Re
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.16
_cell_length_b   5.16
_cell_length_c   5.16
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   PrEr2Re
_chemical_formula_sum   'Pr1 Er2 Re1'
_cell_volume   97.23
_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
  Er  Er0  1  0.47  0.47  0.47  1.0
  Er  Er1  1  0.82  0.82  0.82  1.0
  Re  Re3  1  0.65  0.65  0.65  1.0

data_PrEr2Re
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.16
_cell_length_b   5.16
_cell_length_c   12.64
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   PrEr2Re
_chemical_formula_sum   'Pr3 Er6 Re3'
_cell_volume   291.69
_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
  Er  Er1  3  0.0  0.0  0.18  1.0
  Er  Er2  3  0.0  0.0  0.53  1.0
  Re  Re3  3  0.0  0.0  0.35  1.0

Pr Er Er Re
Pr Er Er Re 0 2 - - - 1 3 o o o 2 3 o o o 
Er2PrRe crystallizes in the trigonal R3m space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a single-bond geometry to one Re(1) atom. The Er(1)-Re(1) bond length is 2.21 Å. In the second Er site, Er(2) is bonded in a distorted linear geometry to one Pr(1) and one Re(1) atom. The Er(2)-Pr(1) bond length is 2.21 Å. The Er(2)-Re(1) bond length is 2.21 Å. Pr(1) is bonded to one Er(2) and three equivalent Re(1) atoms to form distorted PrErRe3 trigonal pyramids that share  a cornercorner with one Re(1)Pr3Er2 trigonal bipyramid and corners with six equivalent Pr(1)ErRe3 trigonal pyramids. All Pr(1)-Re(1) bond lengths are 2.99 Å. Re(1) is bonded to one Er(1), one Er(2), and three equivalent Pr(1) atoms to form distorted RePr3Er2 trigonal bipyramids that share corners with six equivalent Re(1)Pr3Er2 trigonal bipyramids and  a cornercorner with one Pr(1)ErRe3 trigonal pyramid.