The material structure described by VNi15Al4 is Uranium Silicide-derived structured and crystallizes in the tetragonal P4/mmm space group. V(1) is bonded to four equivalent Ni(1) and eight equivalent Ni(4) atoms to form VNi12 cuboctahedra that share corners with four equivalent V(1)Ni12 cuboctahedra, corners with eight equivalent Al(1)Ni12 cuboctahedra, edges with eight equivalent Ni(2)Al4Ni8 cuboctahedra, edges with sixteen equivalent Ni(4)Al2V2Ni8 cuboctahedra, faces with two equivalent Al(1)Ni12 cuboctahedra, faces with four equivalent V(1)Ni12 cuboctahedra, faces with four equivalent Ni(1)V4Ni8 cuboctahedra, and faces with eight equivalent Ni(4)Al2V2Ni8 cuboctahedra. There are six inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to four equivalent V(1) and eight equivalent Ni(4) atoms to form NiV4Ni8 cuboctahedra that share corners with four equivalent Ni(1)V4Ni8 cuboctahedra, corners with eight equivalent Ni(2)Al4Ni8 cuboctahedra, edges with eight equivalent Al(1)Ni12 cuboctahedra, edges with sixteen equivalent Ni(4)Al2V2Ni8 cuboctahedra, faces with two equivalent Ni(2)Al4Ni8 cuboctahedra, faces with four equivalent V(1)Ni12 cuboctahedra, faces with four equivalent Ni(1)V4Ni8 cuboctahedra, and faces with eight equivalent Ni(4)Al2V2Ni8 cuboctahedra. In the second Ni site, Ni(2) is bonded to four equivalent Ni(4), four equivalent Ni(5), and four equivalent Al(1) atoms to form distorted NiAl4Ni8 cuboctahedra that share corners with four equivalent Ni(2)Al4Ni8 cuboctahedra, corners with four equivalent Ni(3)Al4Ni8 cuboctahedra, corners with four equivalent Ni(1)V4Ni8 cuboctahedra, edges with four equivalent V(1)Ni12 cuboctahedra, edges with four equivalent Al(2)Ni12 cuboctahedra, edges with eight equivalent Ni(4)Al2V2Ni8 cuboctahedra, edges with eight equivalent Ni(5)Al4Ni8 cuboctahedra,  a faceface with one Ni(3)Al4Ni8 cuboctahedra,  a faceface with one Ni(1)V4Ni8 cuboctahedra, faces with four equivalent Ni(4)Al2V2Ni8 cuboctahedra, faces with four equivalent Ni(2)Al4Ni8 cuboctahedra, faces with four equivalent Ni(5)Al4Ni8 cuboctahedra, and faces with four equivalent Al(1)Ni12 cuboctahedra. In the third Ni site, Ni(3) is bonded to four equivalent Ni(5), four equivalent Ni(6), and four equivalent Al(2) atoms to form NiAl4Ni8 cuboctahedra that share corners with four equivalent Ni(2)Al4Ni8 cuboctahedra, corners with eight equivalent Ni(3)Al4Ni8 cuboctahedra, edges with four equivalent Al(1)Ni12 cuboctahedra, edges with four equivalent Al(2)Ni12 cuboctahedra, edges with eight equivalent Ni(5)Al4Ni8 cuboctahedra, edges with eight equivalent Ni(6)Al4Ni8 cuboctahedra,  a faceface with one Ni(2)Al4Ni8 cuboctahedra, faces with four equivalent Ni(5)Al4Ni8 cuboctahedra, faces with four equivalent Ni(6)Al4Ni8 cuboctahedra, faces with four equivalent Al(2)Ni12 cuboctahedra, and faces with five equivalent Ni(3)Al4Ni8 cuboctahedra. In the fourth Ni site, Ni(4) is bonded to two equivalent V(1), two equivalent Ni(1), two equivalent Ni(2), four equivalent Ni(4), and two equivalent Al(1) atoms to form distorted NiAl2V2Ni8 cuboctahedra that share corners with four equivalent Ni(5)Al4Ni8 cuboctahedra, corners with eight equivalent Ni(4)Al2V2Ni8 cuboctahedra, edges with four equivalent V(1)Ni12 cuboctahedra, edges with four equivalent Ni(4)Al2V2Ni8 cuboctahedra, edges with four equivalent Ni(2)Al4Ni8 cuboctahedra, edges with four equivalent Ni(5)Al4Ni8 cuboctahedra, edges with four equivalent Ni(1)V4Ni8 cuboctahedra, edges with four equivalent Al(1)Ni12 cuboctahedra,  a faceface with one Ni(5)Al4Ni8 cuboctahedra, faces with two equivalent V(1)Ni12 cuboctahedra, faces with two equivalent Ni(2)Al4Ni8 cuboctahedra, faces with two equivalent Ni(1)V4Ni8 cuboctahedra, faces with two equivalent Al(1)Ni12 cuboctahedra, and faces with nine equivalent Ni(4)Al2V2Ni8 cuboctahedra. In the fifth Ni site, Ni(5) is bonded to two equivalent Ni(2), two equivalent Ni(3), four equivalent Ni(5), two equivalent Al(1), and two equivalent Al(2) atoms to form NiAl4Ni8 cuboctahedra that share corners with four equivalent Ni(4)Al2V2Ni8 cuboctahedra, corners with four equivalent Ni(5)Al4Ni8 cuboctahedra, corners with four equivalent Ni(6)Al4Ni8 cuboctahedra, edges with four equivalent Ni(4)Al2V2Ni8 cuboctahedra, edges with four equivalent Ni(2)Al4Ni8 cuboctahedra, edges with four equivalent Ni(3)Al4Ni8 cuboctahedra, edges with four equivalent Ni(6)Al4Ni8 cuboctahedra, edges with four equivalent Al(1)Ni12 cuboctahedra, edges with four equivalent Al(2)Ni12 cuboctahedra,  a faceface with one Ni(4)Al2V2Ni8 cuboctahedra,  a faceface with one Ni(6)Al4Ni8 cuboctahedra, faces with two equivalent Ni(2)Al4Ni8 cuboctahedra, faces with two equivalent Ni(3)Al4Ni8 cuboctahedra, faces with two equivalent Al(1)Ni12 cuboctahedra, faces with two equivalent Al(2)Ni12 cuboctahedra, and faces with eight equivalent Ni(5)Al4Ni8 cuboctahedra. In the sixth Ni site, Ni(6) is bonded to four equivalent Ni(3), four equivalent Ni(6), and four equivalent Al(2) atoms to form NiAl4Ni8 cuboctahedra that share corners with four equivalent Ni(6)Al4Ni8 cuboctahedra, corners with eight equivalent Ni(5)Al4Ni8 cuboctahedra, edges with eight equivalent Ni(3)Al4Ni8 cuboctahedra, edges with eight equivalent Ni(5)Al4Ni8 cuboctahedra, edges with eight equivalent Al(2)Ni12 cuboctahedra, faces with two equivalent Ni(5)Al4Ni8 cuboctahedra, faces with four equivalent Ni(3)Al4Ni8 cuboctahedra, faces with four equivalent Al(2)Ni12 cuboctahedra, and faces with eight equivalent Ni(6)Al4Ni8 cuboctahedra. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to four equivalent Ni(2), four equivalent Ni(4), and four equivalent Ni(5) atoms to form AlNi12 cuboctahedra that share corners with four equivalent V(1)Ni12 cuboctahedra, corners with four equivalent Al(1)Ni12 cuboctahedra, corners with four equivalent Al(2)Ni12 cuboctahedra, edges with four equivalent Ni(3)Al4Ni8 cuboctahedra, edges with four equivalent Ni(1)V4Ni8 cuboctahedra, edges with eight equivalent Ni(4)Al2V2Ni8 cuboctahedra, edges with eight equivalent Ni(5)Al4Ni8 cuboctahedra,  a faceface with one V(1)Ni12 cuboctahedra,  a faceface with one Al(2)Ni12 cuboctahedra, faces with four equivalent Ni(4)Al2V2Ni8 cuboctahedra, faces with four equivalent Ni(2)Al4Ni8 cuboctahedra, faces with four equivalent Ni(5)Al4Ni8 cuboctahedra, and faces with four equivalent Al(1)Ni12 cuboctahedra. In the second Al site, Al(2) is bonded to four equivalent Ni(3), four equivalent Ni(5), and four equivalent Ni(6) atoms to form AlNi12 cuboctahedra that share corners with four equivalent Al(1)Ni12 cuboctahedra, corners with eight equivalent Al(2)Ni12 cuboctahedra, edges with four equivalent Ni(2)Al4Ni8 cuboctahedra, edges with four equivalent Ni(3)Al4Ni8 cuboctahedra, edges with eight equivalent Ni(5)Al4Ni8 cuboctahedra, edges with eight equivalent Ni(6)Al4Ni8 cuboctahedra,  a faceface with one Al(1)Ni12 cuboctahedra, faces with four equivalent Ni(3)Al4Ni8 cuboctahedra, faces with four equivalent Ni(5)Al4Ni8 cuboctahedra, faces with four equivalent Ni(6)Al4Ni8 cuboctahedra, and faces with five equivalent Al(2)Ni12 cuboctahedra. is represented by the CIF file [CIF]
data_Al4VNi15
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.542
_cell_length_b   3.542
_cell_length_c   17.963
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   225.381
_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  0.000  0.000  0.202  1.0
  Al  Al1  1  0.000  0.000  0.400  1.0
  Al  Al2  1  0.000  0.000  0.600  1.0
  Al  Al3  1  0.000  0.000  0.798  1.0
  V  V4  1  0.000  0.000  0.000  1.0
  Ni  Ni5  1  0.500  0.500  0.000  1.0
  Ni  Ni6  1  0.500  0.500  0.199  1.0
  Ni  Ni7  1  0.500  0.500  0.399  1.0
  Ni  Ni8  1  0.500  0.500  0.601  1.0
  Ni  Ni9  1  0.500  0.500  0.801  1.0
  Ni  Ni10  1  0.500  0.000  0.097  1.0
  Ni  Ni11  1  0.500  0.000  0.300  1.0
  Ni  Ni12  1  0.500  0.000  0.500  1.0
  Ni  Ni13  1  0.500  0.000  0.700  1.0
  Ni  Ni14  1  0.500  0.000  0.903  1.0
  Ni  Ni15  1  0.000  0.500  0.097  1.0
  Ni  Ni16  1  0.000  0.500  0.300  1.0
  Ni  Ni17  1  0.000  0.500  0.500  1.0
  Ni  Ni18  1  0.000  0.500  0.700  1.0
  Ni  Ni19  1  0.000  0.500  0.903  1.0
[/CIF]
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The material structure described by VNi15Al4 is Uranium Silicide-derived structured and crystallizes in the tetragonal P4/mmm space group. V(1) is bonded to four equivalent Ni(1) and eight equivalent Ni(4) atoms to form VNi12 cuboctahedra that share corners with four equivalent V(1)Ni12 cuboctahedra, corners with eight equivalent Al(1)Ni12 cuboctahedra, edges with eight equivalent Ni(2)Al4Ni8 cuboctahedra, edges with sixteen equivalent Ni(4)Al2V2Ni8 cuboctahedra, faces with two equivalent Al(1)Ni12 cuboctahedra, faces with four equivalent V(1)Ni12 cuboctahedra, faces with four equivalent Ni(1)V4Ni8 cuboctahedra, and faces with eight equivalent Ni(4)Al2V2Ni8 cuboctahedra. There are six inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to four equivalent V(1) and eight equivalent Ni(4) atoms to form NiV4Ni8 cuboctahedra that share corners with four equivalent Ni(1)V4Ni8 cuboctahedra, corners with eight equivalent Ni(2)Al4Ni8 cuboctahedra, edges with eight equivalent Al(1)Ni12 cuboctahedra, edges with sixteen equivalent Ni(4)Al2V2Ni8 cuboctahedra, faces with two equivalent Ni(2)Al4Ni8 cuboctahedra, faces with four equivalent V(1)Ni12 cuboctahedra, faces with four equivalent Ni(1)V4Ni8 cuboctahedra, and faces with eight equivalent Ni(4)Al2V2Ni8 cuboctahedra. In the second Ni site, Ni(2) is bonded to four equivalent Ni(4), four equivalent Ni(5), and four equivalent Al(1) atoms to form distorted NiAl4Ni8 cuboctahedra that share corners with four equivalent Ni(2)Al4Ni8 cuboctahedra, corners with four equivalent Ni(3)Al4Ni8 cuboctahedra, corners with four equivalent Ni(1)V4Ni8 cuboctahedra, edges with four equivalent V(1)Ni12 cuboctahedra, edges with four equivalent Al(2)Ni12 cuboctahedra, edges with eight equivalent Ni(4)Al2V2Ni8 cuboctahedra, edges with eight equivalent Ni(5)Al4Ni8 cuboctahedra,  a faceface with one Ni(3)Al4Ni8 cuboctahedra,  a faceface with one Ni(1)V4Ni8 cuboctahedra, faces with four equivalent Ni(4)Al2V2Ni8 cuboctahedra, faces with four equivalent Ni(2)Al4Ni8 cuboctahedra, faces with four equivalent Ni(5)Al4Ni8 cuboctahedra, and faces with four equivalent Al(1)Ni12 cuboctahedra. In the third Ni site, Ni(3) is bonded to four equivalent Ni(5), four equivalent Ni(6), and four equivalent Al(2) atoms to form NiAl4Ni8 cuboctahedra that share corners with four equivalent Ni(2)Al4Ni8 cuboctahedra, corners with eight equivalent Ni(3)Al4Ni8 cuboctahedra, edges with four equivalent Al(1)Ni12 cuboctahedra, edges with four equivalent Al(2)Ni12 cuboctahedra, edges with eight equivalent Ni(5)Al4Ni8 cuboctahedra, edges with eight equivalent Ni(6)Al4Ni8 cuboctahedra,  a faceface with one Ni(2)Al4Ni8 cuboctahedra, faces with four equivalent Ni(5)Al4Ni8 cuboctahedra, faces with four equivalent Ni(6)Al4Ni8 cuboctahedra, faces with four equivalent Al(2)Ni12 cuboctahedra, and faces with five equivalent Ni(3)Al4Ni8 cuboctahedra. In the fourth Ni site, Ni(4) is bonded to two equivalent V(1), two equivalent Ni(1), two equivalent Ni(2), four equivalent Ni(4), and two equivalent Al(1) atoms to form distorted NiAl2V2Ni8 cuboctahedra that share corners with four equivalent Ni(5)Al4Ni8 cuboctahedra, corners with eight equivalent Ni(4)Al2V2Ni8 cuboctahedra, edges with four equivalent V(1)Ni12 cuboctahedra, edges with four equivalent Ni(4)Al2V2Ni8 cuboctahedra, edges with four equivalent Ni(2)Al4Ni8 cuboctahedra, edges with four equivalent Ni(5)Al4Ni8 cuboctahedra, edges with four equivalent Ni(1)V4Ni8 cuboctahedra, edges with four equivalent Al(1)Ni12 cuboctahedra,  a faceface with one Ni(5)Al4Ni8 cuboctahedra, faces with two equivalent V(1)Ni12 cuboctahedra, faces with two equivalent Ni(2)Al4Ni8 cuboctahedra, faces with two equivalent Ni(1)V4Ni8 cuboctahedra, faces with two equivalent Al(1)Ni12 cuboctahedra, and faces with nine equivalent Ni(4)Al2V2Ni8 cuboctahedra. In the fifth Ni site, Ni(5) is bonded to two equivalent Ni(2), two equivalent Ni(3), four equivalent Ni(5), two equivalent Al(1), and two equivalent Al(2) atoms to form NiAl4Ni8 cuboctahedra that share corners with four equivalent Ni(4)Al2V2Ni8 cuboctahedra, corners with four equivalent Ni(5)Al4Ni8 cuboctahedra, corners with four equivalent Ni(6)Al4Ni8 cuboctahedra, edges with four equivalent Ni(4)Al2V2Ni8 cuboctahedra, edges with four equivalent Ni(2)Al4Ni8 cuboctahedra, edges with four equivalent Ni(3)Al4Ni8 cuboctahedra, edges with four equivalent Ni(6)Al4Ni8 cuboctahedra, edges with four equivalent Al(1)Ni12 cuboctahedra, edges with four equivalent Al(2)Ni12 cuboctahedra,  a faceface with one Ni(4)Al2V2Ni8 cuboctahedra,  a faceface with one Ni(6)Al4Ni8 cuboctahedra, faces with two equivalent Ni(2)Al4Ni8 cuboctahedra, faces with two equivalent Ni(3)Al4Ni8 cuboctahedra, faces with two equivalent Al(1)Ni12 cuboctahedra, faces with two equivalent Al(2)Ni12 cuboctahedra, and faces with eight equivalent Ni(5)Al4Ni8 cuboctahedra. In the sixth Ni site, Ni(6) is bonded to four equivalent Ni(3), four equivalent Ni(6), and four equivalent Al(2) atoms to form NiAl4Ni8 cuboctahedra that share corners with four equivalent Ni(6)Al4Ni8 cuboctahedra, corners with eight equivalent Ni(5)Al4Ni8 cuboctahedra, edges with eight equivalent Ni(3)Al4Ni8 cuboctahedra, edges with eight equivalent Ni(5)Al4Ni8 cuboctahedra, edges with eight equivalent Al(2)Ni12 cuboctahedra, faces with two equivalent Ni(5)Al4Ni8 cuboctahedra, faces with four equivalent Ni(3)Al4Ni8 cuboctahedra, faces with four equivalent Al(2)Ni12 cuboctahedra, and faces with eight equivalent Ni(6)Al4Ni8 cuboctahedra. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to four equivalent Ni(2), four equivalent Ni(4), and four equivalent Ni(5) atoms to form AlNi12 cuboctahedra that share corners with four equivalent V(1)Ni12 cuboctahedra, corners with four equivalent Al(1)Ni12 cuboctahedra, corners with four equivalent Al(2)Ni12 cuboctahedra, edges with four equivalent Ni(3)Al4Ni8 cuboctahedra, edges with four equivalent Ni(1)V4Ni8 cuboctahedra, edges with eight equivalent Ni(4)Al2V2Ni8 cuboctahedra, edges with eight equivalent Ni(5)Al4Ni8 cuboctahedra,  a faceface with one V(1)Ni12 cuboctahedra,  a faceface with one Al(2)Ni12 cuboctahedra, faces with four equivalent Ni(4)Al2V2Ni8 cuboctahedra, faces with four equivalent Ni(2)Al4Ni8 cuboctahedra, faces with four equivalent Ni(5)Al4Ni8 cuboctahedra, and faces with four equivalent Al(1)Ni12 cuboctahedra. In the second Al site, Al(2) is bonded to four equivalent Ni(3), four equivalent Ni(5), and four equivalent Ni(6) atoms to form AlNi12 cuboctahedra that share corners with four equivalent Al(1)Ni12 cuboctahedra, corners with eight equivalent Al(2)Ni12 cuboctahedra, edges with four equivalent Ni(2)Al4Ni8 cuboctahedra, edges with four equivalent Ni(3)Al4Ni8 cuboctahedra, edges with eight equivalent Ni(5)Al4Ni8 cuboctahedra, edges with eight equivalent Ni(6)Al4Ni8 cuboctahedra,  a faceface with one Al(1)Ni12 cuboctahedra, faces with four equivalent Ni(3)Al4Ni8 cuboctahedra, faces with four equivalent Ni(5)Al4Ni8 cuboctahedra, faces with four equivalent Ni(6)Al4Ni8 cuboctahedra, and faces with five equivalent Al(2)Ni12 cuboctahedra. is represented by the CIF file [CIF]
data_Al4VNi15
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.542
_cell_length_b   3.542
_cell_length_c   17.963
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   225.381
_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  0.000  0.000  0.202  1.0
  Al  Al1  1  0.000  0.000  0.400  1.0
  Al  Al2  1  0.000  0.000  0.600  1.0
  Al  Al3  1  0.000  0.000  0.798  1.0
  V  V4  1  0.000  0.000  0.000  1.0
  Ni  Ni5  1  0.500  0.500  0.000  1.0
  Ni  Ni6  1  0.500  0.500  0.199  1.0
  Ni  Ni7  1  0.500  0.500  0.399  1.0
  Ni  Ni8  1  0.500  0.500  0.601  1.0
  Ni  Ni9  1  0.500  0.500  0.801  1.0
  Ni  Ni10  1  0.500  0.000  0.097  1.0
  Ni  Ni11  1  0.500  0.000  0.300  1.0
  Ni  Ni12  1  0.500  0.000  0.500  1.0
  Ni  Ni13  1  0.500  0.000  0.700  1.0
  Ni  Ni14  1  0.500  0.000  0.903  1.0
  Ni  Ni15  1  0.000  0.500  0.097  1.0
  Ni  Ni16  1  0.000  0.500  0.300  1.0
  Ni  Ni17  1  0.000  0.500  0.500  1.0
  Ni  Ni18  1  0.000  0.500  0.700  1.0
  Ni  Ni19  1  0.000  0.500  0.903  1.0
[/CIF]
.