data_NaCuSn2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.47
_cell_length_b   5.47
_cell_length_c   5.47
_cell_angle_alpha   131.73
_cell_angle_beta   131.73
_cell_angle_gamma   70.65
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaCuSn2
_chemical_formula_sum   'Na1 Cu1 Sn2'
_cell_volume   89.11
_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
  Na  Na1  1  0.0  0.0  0.0  1.0
  Cu  Cu0  1  0.0  0.23  0.23  1.0
  Sn  Sn2  1  0.23  0.0  0.23  1.0
  Sn  Sn3  1  0.0  0.0  0.46  1.0

data_NaCuSn2
_symmetry_space_group_name_H-M   P1
_cell_length_a   4.47
_cell_length_b   4.47
_cell_length_c   5.47
_cell_angle_alpha   114.13
_cell_angle_beta   114.13
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaCuSn2
_chemical_formula_sum   'Na1 Cu1 Sn2'
_cell_volume   89.11
_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
  Na  Na0  1  0.0  0.0  0.0  1.0
  Cu  Cu1  1  0.99  0.23  0.99  1.0
  Sn  Sn2  1  0.23  0.99  0.99  1.0
  Sn  Sn3  1  0.46  0.46  0.46  1.0

Na Cu Sn Sn
NaCuSn2 is Indium-like structured and crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one NaCuSn2 cluster. Na(1) is bonded in an L-shaped geometry to one Cu(1), one Sn(1), and one Sn(2) atom. The Na(1)-Cu(1) bond length is 1.04 Å. The Na(1)-Sn(1) bond length is 1.04 Å. The Na(1)-Sn(2) bond length is 2.95 Å. Cu(1) is bonded in a single-bond geometry to one Na(1) atom. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a single-bond geometry to one Na(1) atom. In the second Sn site, Sn(2) is bonded in a 1-coordinate geometry to one Na(1) atom.