data_Na2CoSn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.93
_cell_length_b   5.93
_cell_length_c   3.2
_cell_angle_alpha   100.35
_cell_angle_beta   100.35
_cell_angle_gamma   126.71
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2CoSn
_chemical_formula_sum   'Na2 Co1 Sn1'
_cell_volume   82.76
_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  0.69  0.65  0.47  1.0
  Na  Na2  1  0.69  0.35  0.47  1.0
  Co  Co0  1  0.0  0.0  0.0  1.0
  Sn  Sn3  1  0.66  0.0  0.0  1.0

data_Na2CoSn
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.2
_cell_length_b   4.99
_cell_length_c   5.93
_cell_angle_alpha   111.28
_cell_angle_beta   100.35
_cell_angle_gamma   102.36
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2CoSn
_chemical_formula_sum   'Na2 Co1 Sn1'
_cell_volume   82.76
_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  0.12  0.65  0.34  1.0
  Na  Na1  1  0.81  0.35  0.04  1.0
  Co  Co2  1  0.0  0.0  0.0  1.0
  Sn  Sn3  1  0.0  0.0  0.66  1.0

Na Na Co Sn
Na2CoSn crystallizes in the triclinic P1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted single-bond geometry to one Na(2), one Co(1), and two equivalent Sn(1) atoms. The Na(1)-Na(2) bond length is 1.80 Å. The Na(1)-Co(1) bond length is 1.91 Å. There is one shorter (2.54 Å) and one longer (2.82 Å) Na(1)-Sn(1) bond length. In the second Na site, Na(2) is bonded in a 4-coordinate geometry to one Na(1), one Co(1), and two equivalent Sn(1) atoms. The Na(2)-Co(1) bond length is 3.13 Å. There is one shorter (2.22 Å) and one longer (2.86 Å) Na(2)-Sn(1) bond length. Co(1) is bonded in a distorted single-bond geometry to one Na(1), one Na(2), and one Sn(1) atom. The Co(1)-Sn(1) bond length is 2.01 Å. Sn(1) is bonded in a 5-coordinate geometry to two equivalent Na(1), two equivalent Na(2), and one Co(1) atom.