The structure described by TaVNi crystallizes in the orthorhombic Amm2 space group. There are four inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a 16-coordinate geometry to one Ta(1); three Ta(2,2); one V(3); two equivalent V(1); two equivalent V(2); three equivalent Ni(1); and four equivalent Ni(2) atoms. In the second Ta site, Ta(2) is bonded in a 16-coordinate geometry to one Ta(2), three equivalent Ta(1), one V(1), two equivalent V(3), four equivalent V(2), two equivalent Ni(2), and three equivalent Ni(1) atoms. In the third Ta site, Ta(2) is bonded in a 16-coordinate geometry to one Ta(2), three equivalent Ta(1), one V(1), two equivalent V(3), four equivalent V(2), two equivalent Ni(2), and three equivalent Ni(1) atoms. In the fourth Ta site, Ta(1) is bonded in a 16-coordinate geometry to one Ta(1), three equivalent Ta(2), one V(3), two equivalent V(1), two equivalent V(2), three equivalent Ni(1), and four equivalent Ni(2) atoms. There are three inequivalent V sites. In the first V site, V(1) is bonded to two Ta(2,2); four Ta(1,1); two equivalent Ni(1); and four equivalent Ni(2) atoms to form distorted VTa6Ni6 cuboctahedra that share corners with two equivalent V(3)Ta6V4Ni2 cuboctahedra, corners with four equivalent V(1)Ta6Ni6 cuboctahedra, corners with four equivalent Ni(1)Ta6V4Ni2 cuboctahedra, corners with eight equivalent V(2)Ta6V4Ni2 cuboctahedra, edges with two equivalent V(1)Ta6Ni6 cuboctahedra, edges with four equivalent V(3)Ta6V4Ni2 cuboctahedra, faces with four equivalent V(2)Ta6V4Ni2 cuboctahedra, faces with six equivalent Ni(1)Ta6V4Ni2 cuboctahedra, and faces with eight equivalent Ni(2)Ta6V2Ni4 cuboctahedra. In the second V site, V(2) is bonded to two Ta(1,1); four Ta(2,2); two equivalent V(2); two equivalent V(3); and two equivalent Ni(1) atoms to form distorted VTa6V4Ni2 cuboctahedra that share corners with four equivalent V(1)Ta6Ni6 cuboctahedra, corners with four equivalent V(2)Ta6V4Ni2 cuboctahedra, corners with four equivalent Ni(1)Ta6V4Ni2 cuboctahedra, corners with six equivalent Ni(2)Ta6V2Ni4 cuboctahedra, edges with two equivalent V(2)Ta6V4Ni2 cuboctahedra, edges with four equivalent Ni(2)Ta6V2Ni4 cuboctahedra, faces with two equivalent V(1)Ta6Ni6 cuboctahedra, faces with two equivalent Ni(2)Ta6V2Ni4 cuboctahedra, faces with four equivalent V(2)Ta6V4Ni2 cuboctahedra, faces with four equivalent V(3)Ta6V4Ni2 cuboctahedra, and faces with six equivalent Ni(1)Ta6V4Ni2 cuboctahedra. In the third V site, V(3) is bonded to two Ta(1,1); four Ta(2,2); four equivalent V(2); and two equivalent Ni(1) atoms to form distorted VTa6V4Ni2 cuboctahedra that share corners with two equivalent V(1)Ta6Ni6 cuboctahedra, corners with four equivalent V(3)Ta6V4Ni2 cuboctahedra, corners with four equivalent Ni(1)Ta6V4Ni2 cuboctahedra, corners with eight equivalent Ni(2)Ta6V2Ni4 cuboctahedra, edges with two equivalent V(3)Ta6V4Ni2 cuboctahedra, edges with four equivalent V(1)Ta6Ni6 cuboctahedra, faces with four equivalent Ni(2)Ta6V2Ni4 cuboctahedra, faces with six equivalent Ni(1)Ta6V4Ni2 cuboctahedra, and faces with eight equivalent V(2)Ta6V4Ni2 cuboctahedra. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to three equivalent Ta(1); three Ta(2,2); one V(1); one V(3); two equivalent V(2); and two equivalent Ni(2) atoms to form distorted NiTa6V4Ni2 cuboctahedra that share corners with two equivalent V(1)Ta6Ni6 cuboctahedra, corners with two equivalent V(3)Ta6V4Ni2 cuboctahedra, corners with four equivalent V(2)Ta6V4Ni2 cuboctahedra, corners with four equivalent Ni(2)Ta6V2Ni4 cuboctahedra, edges with six equivalent Ni(1)Ta6V4Ni2 cuboctahedra, faces with two equivalent Ni(1)Ta6V4Ni2 cuboctahedra, faces with three equivalent V(1)Ta6Ni6 cuboctahedra, faces with three equivalent V(3)Ta6V4Ni2 cuboctahedra, faces with six equivalent V(2)Ta6V4Ni2 cuboctahedra, and faces with six equivalent Ni(2)Ta6V2Ni4 cuboctahedra. In the second Ni site, Ni(2) is bonded to two Ta(2,2); four Ta(1,1); two equivalent V(1); two equivalent Ni(1); and two equivalent Ni(2) atoms to form distorted NiTa6V2Ni4 cuboctahedra that share corners with four equivalent V(3)Ta6V4Ni2 cuboctahedra, corners with four equivalent Ni(2)Ta6V2Ni4 cuboctahedra, corners with four equivalent Ni(1)Ta6V4Ni2 cuboctahedra, corners with six equivalent V(2)Ta6V4Ni2 cuboctahedra, edges with two equivalent Ni(2)Ta6V2Ni4 cuboctahedra, edges with four equivalent V(2)Ta6V4Ni2 cuboctahedra, faces with two equivalent V(2)Ta6V4Ni2 cuboctahedra, faces with two equivalent V(3)Ta6V4Ni2 cuboctahedra, faces with four equivalent V(1)Ta6Ni6 cuboctahedra, faces with four equivalent Ni(2)Ta6V2Ni4 cuboctahedra, and faces with six equivalent Ni(1)Ta6V4Ni2 cuboctahedra. is represented by the CIF file [CIF]
data_TaVNi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.928
_cell_length_b   4.928
_cell_length_c   8.061
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.206
_symmetry_Int_Tables_number   1
_cell_volume   169.205
_cell_formula_units_Z   4
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
  Ta  Ta0  1  0.325  0.675  0.184  1.0
  Ta  Ta1  1  0.660  0.340  0.306  1.0
  Ta  Ta2  1  0.660  0.340  0.694  1.0
  Ta  Ta3  1  0.325  0.675  0.816  1.0
  V  V4  1  0.841  0.159  0.000  1.0
  V  V5  1  0.170  0.340  0.500  1.0
  V  V6  1  0.660  0.830  0.500  1.0
  V  V7  1  0.173  0.827  0.500  1.0
  Ni  Ni8  1  0.000  1.000  0.245  1.0
  Ni  Ni9  1  0.000  1.000  0.755  1.0
  Ni  Ni10  1  0.836  0.652  0.000  1.0
  Ni  Ni11  1  0.348  0.164  0.000  1.0
[/CIF]
.
The structure described by TaVNi crystallizes in the orthorhombic Amm2 space group. There are four inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a 16-coordinate geometry to one Ta(1); three Ta(2,2); one V(3); two equivalent V(1); two equivalent V(2); three equivalent Ni(1); and four equivalent Ni(2) atoms. In the second Ta site, Ta(2) is bonded in a 16-coordinate geometry to one Ta(2), three equivalent Ta(1), one V(1), two equivalent V(3), four equivalent V(2), two equivalent Ni(2), and three equivalent Ni(1) atoms. In the third Ta site, Ta(2) is bonded in a 16-coordinate geometry to one Ta(2), three equivalent Ta(1), one V(1), two equivalent V(3), four equivalent V(2), two equivalent Ni(2), and three equivalent Ni(1) atoms. In the fourth Ta site, Ta(1) is bonded in a 16-coordinate geometry to one Ta(1), three equivalent Ta(2), one V(3), two equivalent V(1), two equivalent V(2), three equivalent Ni(1), and four equivalent Ni(2) atoms. There are three inequivalent V sites. In the first V site, V(1) is bonded to two Ta(2,2); four Ta(1,1); two equivalent Ni(1); and four equivalent Ni(2) atoms to form distorted VTa6Ni6 cuboctahedra that share corners with two equivalent V(3)Ta6V4Ni2 cuboctahedra, corners with four equivalent V(1)Ta6Ni6 cuboctahedra, corners with four equivalent Ni(1)Ta6V4Ni2 cuboctahedra, corners with eight equivalent V(2)Ta6V4Ni2 cuboctahedra, edges with two equivalent V(1)Ta6Ni6 cuboctahedra, edges with four equivalent V(3)Ta6V4Ni2 cuboctahedra, faces with four equivalent V(2)Ta6V4Ni2 cuboctahedra, faces with six equivalent Ni(1)Ta6V4Ni2 cuboctahedra, and faces with eight equivalent Ni(2)Ta6V2Ni4 cuboctahedra. In the second V site, V(2) is bonded to two Ta(1,1); four Ta(2,2); two equivalent V(2); two equivalent V(3); and two equivalent Ni(1) atoms to form distorted VTa6V4Ni2 cuboctahedra that share corners with four equivalent V(1)Ta6Ni6 cuboctahedra, corners with four equivalent V(2)Ta6V4Ni2 cuboctahedra, corners with four equivalent Ni(1)Ta6V4Ni2 cuboctahedra, corners with six equivalent Ni(2)Ta6V2Ni4 cuboctahedra, edges with two equivalent V(2)Ta6V4Ni2 cuboctahedra, edges with four equivalent Ni(2)Ta6V2Ni4 cuboctahedra, faces with two equivalent V(1)Ta6Ni6 cuboctahedra, faces with two equivalent Ni(2)Ta6V2Ni4 cuboctahedra, faces with four equivalent V(2)Ta6V4Ni2 cuboctahedra, faces with four equivalent V(3)Ta6V4Ni2 cuboctahedra, and faces with six equivalent Ni(1)Ta6V4Ni2 cuboctahedra. In the third V site, V(3) is bonded to two Ta(1,1); four Ta(2,2); four equivalent V(2); and two equivalent Ni(1) atoms to form distorted VTa6V4Ni2 cuboctahedra that share corners with two equivalent V(1)Ta6Ni6 cuboctahedra, corners with four equivalent V(3)Ta6V4Ni2 cuboctahedra, corners with four equivalent Ni(1)Ta6V4Ni2 cuboctahedra, corners with eight equivalent Ni(2)Ta6V2Ni4 cuboctahedra, edges with two equivalent V(3)Ta6V4Ni2 cuboctahedra, edges with four equivalent V(1)Ta6Ni6 cuboctahedra, faces with four equivalent Ni(2)Ta6V2Ni4 cuboctahedra, faces with six equivalent Ni(1)Ta6V4Ni2 cuboctahedra, and faces with eight equivalent V(2)Ta6V4Ni2 cuboctahedra. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to three equivalent Ta(1); three Ta(2,2); one V(1); one V(3); two equivalent V(2); and two equivalent Ni(2) atoms to form distorted NiTa6V4Ni2 cuboctahedra that share corners with two equivalent V(1)Ta6Ni6 cuboctahedra, corners with two equivalent V(3)Ta6V4Ni2 cuboctahedra, corners with four equivalent V(2)Ta6V4Ni2 cuboctahedra, corners with four equivalent Ni(2)Ta6V2Ni4 cuboctahedra, edges with six equivalent Ni(1)Ta6V4Ni2 cuboctahedra, faces with two equivalent Ni(1)Ta6V4Ni2 cuboctahedra, faces with three equivalent V(1)Ta6Ni6 cuboctahedra, faces with three equivalent V(3)Ta6V4Ni2 cuboctahedra, faces with six equivalent V(2)Ta6V4Ni2 cuboctahedra, and faces with six equivalent Ni(2)Ta6V2Ni4 cuboctahedra. In the second Ni site, Ni(2) is bonded to two Ta(2,2); four Ta(1,1); two equivalent V(1); two equivalent Ni(1); and two equivalent Ni(2) atoms to form distorted NiTa6V2Ni4 cuboctahedra that share corners with four equivalent V(3)Ta6V4Ni2 cuboctahedra, corners with four equivalent Ni(2)Ta6V2Ni4 cuboctahedra, corners with four equivalent Ni(1)Ta6V4Ni2 cuboctahedra, corners with six equivalent V(2)Ta6V4Ni2 cuboctahedra, edges with two equivalent Ni(2)Ta6V2Ni4 cuboctahedra, edges with four equivalent V(2)Ta6V4Ni2 cuboctahedra, faces with two equivalent V(2)Ta6V4Ni2 cuboctahedra, faces with two equivalent V(3)Ta6V4Ni2 cuboctahedra, faces with four equivalent V(1)Ta6Ni6 cuboctahedra, faces with four equivalent Ni(2)Ta6V2Ni4 cuboctahedra, and faces with six equivalent Ni(1)Ta6V4Ni2 cuboctahedra. is represented by the CIF file [CIF]
data_TaVNi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.928
_cell_length_b   4.928
_cell_length_c   8.061
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.206
_symmetry_Int_Tables_number   1
_cell_volume   169.205
_cell_formula_units_Z   4
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
  Ta  Ta0  1  0.325  0.675  0.184  1.0
  Ta  Ta1  1  0.660  0.340  0.306  1.0
  Ta  Ta2  1  0.660  0.340  0.694  1.0
  Ta  Ta3  1  0.325  0.675  0.816  1.0
  V  V4  1  0.841  0.159  0.000  1.0
  V  V5  1  0.170  0.340  0.500  1.0
  V  V6  1  0.660  0.830  0.500  1.0
  V  V7  1  0.173  0.827  0.500  1.0
  Ni  Ni8  1  0.000  1.000  0.245  1.0
  Ni  Ni9  1  0.000  1.000  0.755  1.0
  Ni  Ni10  1  0.836  0.652  0.000  1.0
  Ni  Ni11  1  0.348  0.164  0.000  1.0
[/CIF]
.