data_NaSnW
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.71
_cell_length_b   4.71
_cell_length_c   4.71
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaSnW
_chemical_formula_sum   'Na1 Sn1 W1'
_cell_volume   73.74
_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
  Sn  Sn1  1  0.66  0.66  0.66  1.0
  W  W2  1  0.33  0.33  0.33  1.0

data_NaSnW
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.71
_cell_length_b   4.71
_cell_length_c   11.53
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   NaSnW
_chemical_formula_sum   'Na3 Sn3 W3'
_cell_volume   221.22
_cell_formula_units_Z   3
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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  3  0.0  0.0  0.0  1.0
  Sn  Sn1  3  0.0  0.0  0.34  1.0
  W  W2  3  0.0  0.0  0.67  1.0

Na Sn W
NaWSn crystallizes in the trigonal R3m space group. Na(1) is bonded to four equivalent W(1) and three equivalent Sn(1) atoms to form distorted NaSn3W4 hexagonal pyramids that share corners with three equivalent W(1)Na4Sn3 hexagonal pyramids, corners with six equivalent Na(1)Sn3W4 hexagonal pyramids, edges with three equivalent W(1)Na4Sn3 hexagonal pyramids, and edges with six equivalent Na(1)Sn3W4 hexagonal pyramids. There are three shorter (2.72 Å) and one longer (3.79 Å) Na(1)-W(1) bond length. All Na(1)-Sn(1) bond lengths are 2.72 Å. W(1) is bonded to four equivalent Na(1) and three equivalent Sn(1) atoms to form distorted WNa4Sn3 hexagonal pyramids that share corners with three equivalent Na(1)Sn3W4 hexagonal pyramids, corners with six equivalent W(1)Na4Sn3 hexagonal pyramids, edges with three equivalent Na(1)Sn3W4 hexagonal pyramids, and edges with six equivalent W(1)Na4Sn3 hexagonal pyramids. All W(1)-Sn(1) bond lengths are 2.72 Å. Sn(1) is bonded in a hexagonal planar geometry to three equivalent Na(1) and three equivalent W(1) atoms.