The crystal structure described by EuPr3 is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. Eu(1) is bonded to four equivalent Pr(2) and eight equivalent Pr(1) atoms to form EuPr12 cuboctahedra that share corners with four equivalent Eu(1)Pr12 cuboctahedra, corners with eight equivalent Pr(2)Pr8Eu4 cuboctahedra, edges with eight equivalent Eu(1)Pr12 cuboctahedra, edges with sixteen equivalent Pr(1)Pr8Eu4 cuboctahedra, faces with four equivalent Eu(1)Pr12 cuboctahedra, faces with six equivalent Pr(2)Pr8Eu4 cuboctahedra, and faces with eight equivalent Pr(1)Pr8Eu4 cuboctahedra. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to four equivalent Eu(1), four equivalent Pr(1), and four equivalent Pr(2) atoms to form PrPr8Eu4 cuboctahedra that share corners with twelve equivalent Pr(1)Pr8Eu4 cuboctahedra, edges with eight equivalent Eu(1)Pr12 cuboctahedra, edges with eight equivalent Pr(1)Pr8Eu4 cuboctahedra, edges with eight equivalent Pr(2)Pr8Eu4 cuboctahedra, faces with four equivalent Eu(1)Pr12 cuboctahedra, faces with four equivalent Pr(2)Pr8Eu4 cuboctahedra, and faces with ten equivalent Pr(1)Pr8Eu4 cuboctahedra. In the second Pr site, Pr(2) is bonded to four equivalent Eu(1) and eight equivalent Pr(1) atoms to form PrPr8Eu4 cuboctahedra that share corners with four equivalent Pr(2)Pr8Eu4 cuboctahedra, corners with eight equivalent Eu(1)Pr12 cuboctahedra, edges with eight equivalent Pr(2)Pr8Eu4 cuboctahedra, edges with sixteen equivalent Pr(1)Pr8Eu4 cuboctahedra, faces with four equivalent Pr(2)Pr8Eu4 cuboctahedra, faces with six equivalent Eu(1)Pr12 cuboctahedra, and faces with eight equivalent Pr(1)Pr8Eu4 cuboctahedra. is represented by the CIF card [CIF]
data_Pr3Eu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.794
_cell_length_b   6.794
_cell_length_c   6.794
_cell_angle_alpha   132.503
_cell_angle_beta   132.503
_cell_angle_gamma   69.436
_symmetry_Int_Tables_number   1
_cell_volume   167.264
_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  0.750  0.250  0.500  1.0
  Pr  Pr1  1  0.250  0.750  0.500  1.0
  Pr  Pr2  1  0.500  0.500  0.000  1.0
  Eu  Eu3  1  0.000  0.000  0.000  1.0
[/CIF]
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The crystal structure described by EuPr3 is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. Eu(1) is bonded to four equivalent Pr(2) and eight equivalent Pr(1) atoms to form EuPr12 cuboctahedra that share corners with four equivalent Eu(1)Pr12 cuboctahedra, corners with eight equivalent Pr(2)Pr8Eu4 cuboctahedra, edges with eight equivalent Eu(1)Pr12 cuboctahedra, edges with sixteen equivalent Pr(1)Pr8Eu4 cuboctahedra, faces with four equivalent Eu(1)Pr12 cuboctahedra, faces with six equivalent Pr(2)Pr8Eu4 cuboctahedra, and faces with eight equivalent Pr(1)Pr8Eu4 cuboctahedra. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded to four equivalent Eu(1), four equivalent Pr(1), and four equivalent Pr(2) atoms to form PrPr8Eu4 cuboctahedra that share corners with twelve equivalent Pr(1)Pr8Eu4 cuboctahedra, edges with eight equivalent Eu(1)Pr12 cuboctahedra, edges with eight equivalent Pr(1)Pr8Eu4 cuboctahedra, edges with eight equivalent Pr(2)Pr8Eu4 cuboctahedra, faces with four equivalent Eu(1)Pr12 cuboctahedra, faces with four equivalent Pr(2)Pr8Eu4 cuboctahedra, and faces with ten equivalent Pr(1)Pr8Eu4 cuboctahedra. In the second Pr site, Pr(2) is bonded to four equivalent Eu(1) and eight equivalent Pr(1) atoms to form PrPr8Eu4 cuboctahedra that share corners with four equivalent Pr(2)Pr8Eu4 cuboctahedra, corners with eight equivalent Eu(1)Pr12 cuboctahedra, edges with eight equivalent Pr(2)Pr8Eu4 cuboctahedra, edges with sixteen equivalent Pr(1)Pr8Eu4 cuboctahedra, faces with four equivalent Pr(2)Pr8Eu4 cuboctahedra, faces with six equivalent Eu(1)Pr12 cuboctahedra, and faces with eight equivalent Pr(1)Pr8Eu4 cuboctahedra. is represented by the CIF card [CIF]
data_Pr3Eu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.794
_cell_length_b   6.794
_cell_length_c   6.794
_cell_angle_alpha   132.503
_cell_angle_beta   132.503
_cell_angle_gamma   69.436
_symmetry_Int_Tables_number   1
_cell_volume   167.264
_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  0.750  0.250  0.500  1.0
  Pr  Pr1  1  0.250  0.750  0.500  1.0
  Pr  Pr2  1  0.500  0.500  0.000  1.0
  Eu  Eu3  1  0.000  0.000  0.000  1.0
[/CIF]
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