data_PrEu3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.75
_cell_length_b   7.75
_cell_length_c   6.26
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   PrEu3
_chemical_formula_sum   'Pr2 Eu6'
_cell_volume   325.86
_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  0.88  0.24  0.69  1.0
  Pr  Pr1  1  0.0  0.48  0.56  1.0
  Eu  Eu2  1  0.97  0.14  0.56  1.0
  Eu  Eu3  1  0.78  0.14  0.56  1.0
  Eu  Eu4  1  0.88  0.44  0.56  1.0
  Eu  Eu5  1  0.91  0.58  0.69  1.0
  Eu  Eu6  1  0.09  0.58  0.69  1.0
  Eu  Eu7  1  0.0  0.27  0.69  1.0

data_PrEu3
_symmetry_space_group_name_H-M   P-1
_cell_length_a   6.26
_cell_length_b   7.75
_cell_length_c   7.75
_cell_angle_alpha   120.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   PrEu3
_chemical_formula_sum   'Pr2 Eu6'
_cell_volume   325.86
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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  2  0.44  0.56  0.12  1.0
  Eu  Eu1  2  0.44  0.35  0.78  1.0
  Eu  Eu2  2  0.44  0.44  0.08  1.0
  Eu  Eu3  2  0.44  0.53  0.78  1.0

Pr Pr Eu Eu Eu Eu Eu Eu
Pr Pr Eu Eu Eu Eu Eu Eu 0 7 + o o 0 2 o o o 0 3 o o o 1 4 - o o 1 5 - o o 1 6 o o o 2 7 + o o 2 3 o o o 4 5 o o o 5 6 + o o 
Eu3Pr is Cubic alpha N2-like structured and crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two Eu3Pr clusters. There are three inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 2-coordinate geometry to one Eu(2) and one Eu(3) atom. The Eu(1)-Eu(2) bond length is 1.44 Å. The Eu(1)-Eu(3) bond length is 1.26 Å. In the second Eu site, Eu(2) is bonded in a distorted single-bond geometry to one Eu(1) and one Pr(1) atom. The Eu(2)-Pr(1) bond length is 1.11 Å. In the third Eu site, Eu(3) is bonded in a distorted single-bond geometry to one Eu(1) and one Pr(1) atom. The Eu(3)-Pr(1) bond length is 0.85 Å. Pr(1) is bonded in a 1-coordinate geometry to one Eu(2) and one Eu(3) atom.