data_Sr2EuSn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.9
_cell_length_b   5.9
_cell_length_c   5.9
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sr2EuSn
_chemical_formula_sum   'Sr2 Eu1 Sn1'
_cell_volume   145.54
_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  0.09  0.09  0.09  1.0
  Sr  Sr3  1  0.26  0.26  0.26  1.0
  Eu  Eu0  1  0.17  0.17  0.17  1.0
  Sn  Sn1  1  0.0  0.0  0.0  1.0

data_Sr2EuSn
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.9
_cell_length_b   5.9
_cell_length_c   14.46
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   Sr2EuSn
_chemical_formula_sum   'Sr6 Eu3 Sn3'
_cell_volume   436.63
_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  0.74  1.0
  Sr  Sr1  3  0.0  0.0  0.91  1.0
  Eu  Eu2  3  0.0  0.0  0.83  1.0
  Sn  Sn3  3  0.0  0.0  0.0  1.0

Sr Sr Eu Sn
Sr Sr Eu Sn 0 3 o o o 0 2 o o o 1 2 o o o 
Sr2EuSn is Copper structured and crystallizes in the trigonal R3m space group. The structure is zero-dimensional and consists of three Sr2EuSn clusters. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a linear geometry to one Eu(1) and one Sn(1) atom. The Sr(1)-Eu(1) bond length is 1.27 Å. The Sr(1)-Sn(1) bond length is 1.27 Å. In the second Sr site, Sr(2) is bonded in a distorted single-bond geometry to one Eu(1) atom. The Sr(2)-Eu(1) bond length is 1.27 Å. Eu(1) is bonded in a linear geometry to one Sr(1) and one Sr(2) atom. Sn(1) is bonded in a single-bond geometry to one Sr(1) atom.