data_SrEu2Gd
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.18
_cell_length_b   6.18
_cell_length_c   6.18
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrEu2Gd
_chemical_formula_sum   'Sr1 Eu2 Gd1'
_cell_volume   167.2
_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
  Sr  Sr3  1  0.0  0.0  0.0  1.0
  Eu  Eu0  1  0.19  0.19  0.19  1.0
  Eu  Eu1  1  0.56  0.56  0.56  1.0
  Gd  Gd2  1  0.37  0.37  0.37  1.0

data_SrEu2Gd
_symmetry_space_group_name_H-M   R3m
_cell_length_a   6.18
_cell_length_b   6.18
_cell_length_c   15.15
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   SrEu2Gd
_chemical_formula_sum   'Sr3 Eu6 Gd3'
_cell_volume   501.59
_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
  Sr  Sr0  3  0.0  0.0  0.0  1.0
  Eu  Eu1  3  0.0  0.0  0.44  1.0
  Gd  Gd2  3  0.0  0.0  0.63  1.0
  Eu  Eu3  3  0.0  0.0  0.81  1.0

Sr Eu Eu Gd
SrGdEu2 crystallizes in the trigonal R3m space group. Sr(1) is bonded in a 1-coordinate geometry to three equivalent Gd(1), one Eu(1), and three equivalent Eu(2) atoms. All Sr(1)-Gd(1) bond lengths are 3.62 Å. The Sr(1)-Eu(1) bond length is 2.82 Å. All Sr(1)-Eu(2) bond lengths are 3.93 Å. Gd(1) is bonded to three equivalent Sr(1), one Eu(1), and one Eu(2) atom to form distorted corner-sharing GdSr3Eu2 trigonal bipyramids. The Gd(1)-Eu(1) bond length is 2.82 Å. The Gd(1)-Eu(2) bond length is 2.82 Å. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 2-coordinate geometry to one Sr(1), one Gd(1), and three equivalent Eu(2) atoms. All Eu(1)-Eu(2) bond lengths are 3.62 Å. In the second Eu site, Eu(2) is bonded in a 7-coordinate geometry to three equivalent Sr(1), one Gd(1), and three equivalent Eu(1) atoms.