data_SrVSi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.69
_cell_length_b   4.69
_cell_length_c   4.69
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrVSi
_chemical_formula_sum   'Sr1 V1 Si1'
_cell_volume   73.09
_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
  Sr  Sr1  1  0.32  0.32  0.32  1.0
  V  V2  1  0.66  0.66  0.66  1.0
  Si  Si0  1  0.0  0.0  0.0  1.0

data_SrVSi
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.69
_cell_length_b   4.69
_cell_length_c   11.5
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   SrVSi
_chemical_formula_sum   'Sr3 V3 Si3'
_cell_volume   219.27
_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
  Sr  Sr0  3  0.0  0.0  0.68  1.0
  V  V1  3  0.0  0.0  0.34  1.0
  Si  Si2  3  0.0  0.0  0.0  1.0

Sr V Si
Sr V Si 0 2 o o + 0 2 o + o 0 2 + o o 0 1 - o o 0 1 o - o 0 1 o o - 1 2 o + + 1 2 + o + 1 2 + + o 
SrVSi crystallizes in the trigonal R3m space group. Sr(1) is bonded to four equivalent V(1) and four equivalent Si(1) atoms to form distorted SrV4Si4 hexagonal bipyramids that share corners with six equivalent V(1)Sr4Si3 hexagonal pyramids, corners with six equivalent Si(1)Sr4V3 hexagonal pyramids, edges with twelve equivalent Sr(1)V4Si4 hexagonal bipyramids, edges with three equivalent V(1)Sr4Si3 hexagonal pyramids, and edges with three equivalent Si(1)Sr4V3 hexagonal pyramids. There are three shorter (2.71 Å) and one longer (3.92 Å) Sr(1)-V(1) bond length. There are three shorter (2.71 Å) and one longer (3.66 Å) Sr(1)-Si(1) bond length. V(1) is bonded to four equivalent Sr(1) and three equivalent Si(1) atoms to form distorted VSr4Si3 hexagonal pyramids that share corners with six equivalent Sr(1)V4Si4 hexagonal bipyramids, corners with four equivalent Si(1)Sr4V3 hexagonal pyramids, corners with six equivalent V(1)Sr4Si3 hexagonal pyramids, edges with three equivalent Sr(1)V4Si4 hexagonal bipyramids, edges with six equivalent V(1)Sr4Si3 hexagonal pyramids, and edges with six equivalent Si(1)Sr4V3 hexagonal pyramids. All V(1)-Si(1) bond lengths are 2.71 Å. Si(1) is bonded to four equivalent Sr(1) and three equivalent V(1) atoms to form SiSr4V3 hexagonal pyramids that share corners with six equivalent Sr(1)V4Si4 hexagonal bipyramids, corners with four equivalent V(1)Sr4Si3 hexagonal pyramids, corners with six equivalent Si(1)Sr4V3 hexagonal pyramids, edges with three equivalent Sr(1)V4Si4 hexagonal bipyramids, edges with six equivalent V(1)Sr4Si3 hexagonal pyramids, and edges with six equivalent Si(1)Sr4V3 hexagonal pyramids.