data_LiVNi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.94
_cell_length_b   3.94
_cell_length_c   3.94
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   LiVNi
_chemical_formula_sum   'Li1 V1 Ni1'
_cell_volume   43.3
_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
  Li  Li0  1  0.0  0.0  0.0  1.0
  V  V2  1  0.79  0.79  0.79  1.0
  Ni  Ni1  1  0.18  0.18  0.18  1.0

data_LiVNi
_symmetry_space_group_name_H-M   R3m
_cell_length_a   3.94
_cell_length_b   3.94
_cell_length_c   9.65
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   LiVNi
_chemical_formula_sum   'Li3 V3 Ni3'
_cell_volume   129.89
_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
  Li  Li0  3  0.0  0.0  0.0  1.0
  V  V1  3  0.0  0.0  0.21  1.0
  Ni  Ni2  3  0.0  0.0  0.82  1.0

Li V Ni
Li V Ni 0 1 - - - 0 1 - o - 0 1 o - - 0 1 - - o 0 2 o o o 1 2 o + + 1 2 + o + 1 2 + + o 
LiNiV is half-Heusler structured and crystallizes in the trigonal R3m space group. Li(1) is bonded in a 8-coordinate geometry to four equivalent V(1) and four equivalent Ni(1) atoms. There is one shorter (2.06 Å) and three longer (2.56 Å) Li(1)-V(1) bond lengths. There is one shorter (1.74 Å) and three longer (2.71 Å) Li(1)-Ni(1) bond lengths. V(1) is bonded in a 7-coordinate geometry to four equivalent Li(1) and three equivalent Ni(1) atoms. All V(1)-Ni(1) bond lengths are 2.35 Å. Ni(1) is bonded in a distorted single-bond geometry to four equivalent Li(1) and three equivalent V(1) atoms.