data_AlV4Si
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.93
_cell_length_b   4.93
_cell_length_c   4.93
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   AlV4Si
_chemical_formula_sum   'Al1 V4 Si1'
_cell_volume   84.8
_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
  Al  Al0  1  0.0  0.0  0.0  1.0
  V  V2  1  0.36  0.61  0.36  1.0
  V  V3  1  0.61  0.36  0.36  1.0
  V  V4  1  0.61  0.61  0.61  1.0
  V  V5  1  0.36  0.36  0.61  1.0
  Si  Si1  1  0.23  0.23  0.23  1.0

data_AlV4Si
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.93
_cell_length_b   4.93
_cell_length_c   12.08
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   AlV4Si
_chemical_formula_sum   'Al3 V12 Si3'
_cell_volume   254.39
_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
  Al  Al0  3  0.0  0.0  0.0  1.0
  V  V1  9  0.08  0.17  0.55  1.0
  V  V2  3  0.0  0.0  0.39  1.0
  Si  Si3  3  0.0  0.0  0.77  1.0

Al V V V V Si
Al V V V V Si 0 5 o - o 0 5 - o o 0 5 o o - 0 5 o o o 0 3 - - o 0 3 - o - 0 3 o - - 0 2 - o o 0 1 o - o 0 4 o o - 1 4 o o o 1 2 o o o 1 3 o o o 1 5 o + o 1 5 o o o 2 4 o o o 2 3 o o o 2 5 + o o 2 5 o o o 3 4 o o o 3 5 + o o 3 5 o + o 3 5 o o + 4 5 o o + 4 5 o o o 
V4AlSi crystallizes in the trigonal R3m space group. There are two inequivalent V sites. In the first V site, V(1) is bonded in a 6-coordinate geometry to one V(2), two equivalent V(1), one Al(1), and two equivalent Si(1) atoms. The V(1)-V(2) bond length is 2.14 Å. Both V(1)-V(1) bond lengths are 1.24 Å. The V(1)-Al(1) bond length is 2.52 Å. There is one shorter (2.57 Å) and one longer (2.69 Å) V(1)-Si(1) bond length. In the second V site, V(2) is bonded in a 9-coordinate geometry to three equivalent V(1), three equivalent Al(1), and three equivalent Si(1) atoms. All V(2)-Al(1) bond lengths are 2.92 Å. All V(2)-Si(1) bond lengths are 2.91 Å. Al(1) is bonded in a 7-coordinate geometry to three equivalent V(1), three equivalent V(2), and one Si(1) atom. The Al(1)-Si(1) bond length is 2.78 Å. Si(1) is bonded in a 10-coordinate geometry to three equivalent V(2), six equivalent V(1), and one Al(1) atom.