data_Na2VPt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.68
_cell_length_b   2.68
_cell_length_c   10.24
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2VPt
_chemical_formula_sum   'Na2 V1 Pt1'
_cell_volume   73.46
_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  0.34  0.34  0.79  1.0
  Na  Na1  1  0.34  0.34  0.45  1.0
  V  V3  1  0.0  0.0  0.0  1.0
  Pt  Pt2  1  0.0  0.0  0.12  1.0

data_Na2VPt
_symmetry_space_group_name_H-M   Cm
_cell_length_a   3.79
_cell_length_b   3.79
_cell_length_c   10.24
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Na2VPt
_chemical_formula_sum   'Na4 V2 Pt2'
_cell_volume   146.91
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  2  0.34  0.0  0.45  1.0
  Na  Na1  2  0.34  0.0  0.79  1.0
  V  V2  2  0.0  0.0  0.0  1.0
  Pt  Pt3  2  0.0  0.0  0.12  1.0

Na Na V Pt
Na Na V Pt 0 2 o o + 0 2 o + + 0 2 + o + 0 0 + o o 0 0 o + o 1 1 + o o 1 1 o + o 2 3 o o o 
Na2VPt crystallizes in the monoclinic Cm 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) and one V(1) atom. The Na(1)-Na(2) bond length is 3.47 Å. The Na(1)-V(1) bond length is 2.51 Å. In the second Na site, Na(2) is bonded to one Na(1), four equivalent Na(2), and one Pt(1) atom to form a mixture of distorted edge and corner-sharing NaNa5Pt octahedra. The corner-sharing octahedra are not tilted. All Na(2)-Na(2) bond lengths are 2.68 Å. The Na(2)-Pt(1) bond length is 3.62 Å. V(1) is bonded in a single-bond geometry to one Na(1) and one Pt(1) atom. The V(1)-Pt(1) bond length is 1.23 Å. Pt(1) is bonded in a single-bond geometry to one Na(2) and one V(1) atom.