data_VWC2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.77
_cell_length_b   3.77
_cell_length_c   3.77
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   VWC2
_chemical_formula_sum   'V1 W1 C2'
_cell_volume   37.87
_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
  V  V2  1  0.0  0.0  0.0  1.0
  W  W3  1  0.67  0.67  0.67  1.0
  C  C0  1  0.33  0.33  0.33  1.0
  C  C1  1  1.0  1.0  1.0  1.0

data_VWC2
_symmetry_space_group_name_H-M   R3m
_cell_length_a   3.77
_cell_length_b   3.77
_cell_length_c   9.23
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   VWC2
_chemical_formula_sum   'V3 W3 C6'
_cell_volume   113.61
_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
  V  V0  3  0.0  0.0  0.0  1.0
  W  W1  3  0.0  0.0  0.33  1.0
  C  C2  3  0.0  0.0  0.0  1.0
  C  C3  3  0.0  0.0  0.67  1.0

V W C C 0 3 - - - 0 1 o - - 0 1 - o - 0 1 - - o 0 2 o o - 0 2 o - o 0 2 - o o 1 2 o o + 1 2 o + o 1 2 + o o 1 3 - o o 1 3 o - o 1 3 o o - 2 3 - - o 2 3 - o - 2 3 o - - 
VWC2 crystallizes in the trigonal R3m space group. V(1) is bonded in a single-bond geometry to three equivalent W(1), one C(2), and three equivalent C(1) atoms. All V(1)-W(1) bond lengths are 2.18 Å. The V(1)-C(2) bond length is 0.02 Å. All V(1)-C(1) bond lengths are 2.18 Å. W(1) is bonded in a 11-coordinate geometry to three equivalent V(1), four equivalent C(1), and four equivalent C(2) atoms. There are three shorter (2.18 Å) and one longer (3.07 Å) W(1)-C(1) bond length. There are three shorter (2.18 Å) and one longer (3.07 Å) W(1)-C(2) bond length. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted hexagonal planar geometry to three equivalent V(1) and four equivalent W(1) atoms. In the second C site, C(2) is bonded in a single-bond geometry to one V(1) and four equivalent W(1) atoms.