data_Na3Pt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.09
_cell_length_b   3.09
_cell_length_c   11.1
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na3Pt
_chemical_formula_sum   'Na3 Pt1'
_cell_volume   92.06
_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  0.55  0.89  0.87  1.0
  Na  Na1  1  0.55  0.89  0.24  1.0
  Na  Na2  1  0.0  0.0  0.0  1.0
  Pt  Pt3  1  0.0  0.0  0.55  1.0

data_Na3Pt
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.09
_cell_length_b   3.09
_cell_length_c   11.1
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na3Pt
_chemical_formula_sum   'Na3 Pt1'
_cell_volume   92.06
_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
  Na  Na1  1  0.55  0.89  0.24  1.0
  Na  Na2  1  0.55  0.89  0.87  1.0
  Pt  Pt3  1  0.0  0.0  0.55  1.0

Na Na Na Pt
Na Na Na Pt 0 2 + + + 1 2 o o o 1 2 o + o 1 2 + + o 1 1 + + o 1 1 o + o 1 1 + o o 3 3 + + o 3 3 o + o 3 3 + o o 
Na3Pt crystallizes in the triclinic P1 space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 2-coordinate geometry to two equivalent Na(3) and one Pt(1) atom. There is one shorter (1.95 Å) and one longer (2.40 Å) Na(1)-Na(3) bond length. The Na(1)-Pt(1) bond length is 3.73 Å. In the second Na site, Na(2) is bonded in a 9-coordinate geometry to two equivalent Na(3), six equivalent Na(2), and one Pt(1) atom. There is one shorter (2.90 Å) and one longer (3.22 Å) Na(2)-Na(3) bond length. All Na(2)-Na(2) bond lengths are 3.09 Å. The Na(2)-Pt(1) bond length is 3.73 Å. In the third Na site, Na(3) is bonded in a 1-coordinate geometry to two equivalent Na(1) and two equivalent Na(2) atoms. Pt(1) is bonded in a 8-coordinate geometry to one Na(1), one Na(2), and six equivalent Pt(1) atoms. All Pt(1)-Pt(1) bond lengths are 3.09 Å.