data_PmEu2Ru
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.2
_cell_length_b   5.2
_cell_length_c   5.2
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   PmEu2Ru
_chemical_formula_sum   'Pm1 Eu2 Ru1'
_cell_volume   99.23
_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
  Pm  Pm2  1  0.67  0.67  0.67  1.0
  Eu  Eu0  1  0.84  0.84  0.84  1.0
  Eu  Eu1  1  0.51  0.51  0.51  1.0
  Ru  Ru3  1  0.0  0.0  0.0  1.0

data_PmEu2Ru
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.2
_cell_length_b   5.2
_cell_length_c   12.73
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   PmEu2Ru
_chemical_formula_sum   'Pm3 Eu6 Ru3'
_cell_volume   297.69
_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
  Pm  Pm0  3  0.0  0.0  0.33  1.0
  Eu  Eu1  3  0.0  0.0  0.16  1.0
  Eu  Eu2  3  0.0  0.0  0.49  1.0
  Ru  Ru3  3  0.0  0.0  0.0  1.0

Pm Eu Eu Ru
Eu2PmRu crystallizes in the trigonal R3m space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a distorted linear geometry to one Pm(1) and one Ru(1) atom. The Eu(1)-Pm(1) bond length is 2.07 Å. The Eu(1)-Ru(1) bond length is 2.07 Å. In the second Eu site, Eu(2) is bonded in a distorted single-bond geometry to one Pm(1) atom. The Eu(2)-Pm(1) bond length is 2.07 Å. Pm(1) is bonded to one Eu(1), one Eu(2), and three equivalent Ru(1) atoms to form corner-sharing PmEu2Ru3 trigonal bipyramids. All Pm(1)-Ru(1) bond lengths are 3.00 Å. Ru(1) is bonded in a distorted single-bond geometry to one Eu(1) and three equivalent Pm(1) atoms.