data_Re2SnAs
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.85
_cell_length_b   4.85
_cell_length_c   4.85
_cell_angle_alpha   128.32
_cell_angle_beta   128.32
_cell_angle_gamma   76.11
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Re2SnAs
_chemical_formula_sum   'Re2 Sn1 As1'
_cell_volume   68.08
_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
  Re  Re1  1  0.11  0.0  0.91  1.0
  Re  Re2  1  0.0  0.0  0.82  1.0
  Sn  Sn3  1  0.0  0.11  0.91  1.0
  As  As0  1  0.0  0.0  0.0  1.0

data_Re2SnAs
_symmetry_space_group_name_H-M   P1
_cell_length_a   4.22
_cell_length_b   4.22
_cell_length_c   4.85
_cell_angle_alpha   115.84
_cell_angle_beta   115.84
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Re2SnAs
_chemical_formula_sum   'Re2 Sn1 As1'
_cell_volume   68.08
_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
  Re  Re0  1  0.82  0.82  0.82  1.0
  Re  Re1  1  0.91  0.8  0.8  1.0
  Sn  Sn2  1  0.8  0.91  0.8  1.0
  As  As3  1  0.0  0.0  0.0  1.0

Re Re Sn As
Re Re Sn As 0 1 o o o 0 3 o o + 1 2 o o o 1 3 o o + 2 3 o o + 
Re2SnAs is Copper structured and crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one Re2SnAs cluster. There are two inequivalent Re sites. In the first Re site, Re(1) is bonded in a 3-coordinate geometry to one Re(2), one Sn(1), and one As(1) atom. The Re(1)-Re(2) bond length is 0.44 Å. The Re(1)-Sn(1) bond length is 0.67 Å. The Re(1)-As(1) bond length is 0.89 Å. In the second Re site, Re(2) is bonded in a distorted water-like geometry to one Re(1), one Sn(1), and one As(1) atom. The Re(2)-Sn(1) bond length is 0.44 Å. The Re(2)-As(1) bond length is 0.89 Å. Sn(1) is bonded in a distorted single-bond geometry to one Re(1), one Re(2), and one As(1) atom. The Sn(1)-As(1) bond length is 0.89 Å. As(1) is bonded in a 3-coordinate geometry to one Re(1), one Re(2), and one Sn(1) atom.