data_Sr2ErPu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.11
_cell_length_b   6.11
_cell_length_c   6.11
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sr2ErPu
_chemical_formula_sum   'Sr2 Er1 Pu1'
_cell_volume   160.9
_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  Sr2  1  0.48  0.48  0.48  1.0
  Sr  Sr3  1  0.16  0.16  0.16  1.0
  Er  Er0  1  0.0  0.0  0.0  1.0
  Pu  Pu1  1  0.32  0.32  0.32  1.0

data_Sr2ErPu
_symmetry_space_group_name_H-M   R3m
_cell_length_a   6.11
_cell_length_b   6.11
_cell_length_c   14.95
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   Sr2ErPu
_chemical_formula_sum   'Sr6 Er3 Pu3'
_cell_volume   482.71
_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  0.52  1.0
  Sr  Sr1  3  0.0  0.0  0.84  1.0
  Er  Er2  3  0.0  0.0  0.0  1.0
  Pu  Pu3  3  0.0  0.0  0.68  1.0

Sr Sr Er Pu
Sr Sr Er Pu 0 3 o o o 1 2 o o o 1 3 o o o 
Sr2PuEr is Copper structured and crystallizes in the trigonal R3m space group. The structure is zero-dimensional and consists of three Sr2PuEr clusters. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a single-bond geometry to one Pu(1) atom. The Sr(1)-Pu(1) bond length is 2.37 Å. In the second Sr site, Sr(2) is bonded in a linear geometry to one Pu(1) and one Er(1) atom. The Sr(2)-Pu(1) bond length is 2.37 Å. The Sr(2)-Er(1) bond length is 2.37 Å. Pu(1) is bonded in a linear geometry to one Sr(1) and one Sr(2) atom. Er(1) is bonded in a single-bond geometry to one Sr(2) atom.