The structure described by W2Ni3Si is Hexagonal Laves-derived structured and crystallizes in the orthorhombic Amm2 space group. There are two inequivalent W sites. In the first W site, W(1) is bonded in a 16-coordinate geometry to one W(1), three equivalent W(2), one Ni(1), two equivalent Ni(3), three equivalent Ni(4), four equivalent Ni(2), and two equivalent Si(1) atoms. In the second W site, W(2) is bonded in a 12-coordinate geometry to three equivalent W(1), one Ni(3), two equivalent Ni(1), two equivalent Ni(2), three equivalent Ni(4), and four equivalent Si(1) atoms. There are four inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to two equivalent W(1), four equivalent W(2), two equivalent Ni(4), and four equivalent Si(1) atoms to form NiSi4Ni2W6 cuboctahedra that share corners with two equivalent Ni(3)Ni6W6 cuboctahedra, corners with four equivalent Ni(4)Si2Ni4W6 cuboctahedra, corners with four equivalent Ni(1)Si4Ni2W6 cuboctahedra, corners with eight equivalent Ni(2)Ni6W6 cuboctahedra, edges with two equivalent Ni(1)Si4Ni2W6 cuboctahedra, edges with four equivalent Ni(3)Ni6W6 cuboctahedra, faces with four equivalent Ni(2)Ni6W6 cuboctahedra, faces with six equivalent Ni(4)Si2Ni4W6 cuboctahedra, and faces with eight equivalent Si(1)Si2Ni4W6 cuboctahedra. In the second Ni site, Ni(2) is bonded to two equivalent W(2), four equivalent W(1), two equivalent Ni(2), two equivalent Ni(3), and two equivalent Ni(4) atoms to form NiNi6W6 cuboctahedra that share corners with four equivalent Ni(2)Ni6W6 cuboctahedra, corners with four equivalent Ni(4)Si2Ni4W6 cuboctahedra, corners with four equivalent Ni(1)Si4Ni2W6 cuboctahedra, corners with six equivalent Si(1)Si2Ni4W6 cuboctahedra, edges with two equivalent Ni(2)Ni6W6 cuboctahedra, edges with four equivalent Si(1)Si2Ni4W6 cuboctahedra, faces with two equivalent Ni(1)Si4Ni2W6 cuboctahedra, faces with two equivalent Si(1)Si2Ni4W6 cuboctahedra, faces with four equivalent Ni(2)Ni6W6 cuboctahedra, faces with four equivalent Ni(3)Ni6W6 cuboctahedra, and faces with six equivalent Ni(4)Si2Ni4W6 cuboctahedra. In the third Ni site, Ni(3) is bonded to two equivalent W(2), four equivalent W(1), two equivalent Ni(4), and four equivalent Ni(2) atoms to form NiNi6W6 cuboctahedra that share corners with two equivalent Ni(1)Si4Ni2W6 cuboctahedra, corners with four equivalent Ni(3)Ni6W6 cuboctahedra, corners with four equivalent Ni(4)Si2Ni4W6 cuboctahedra, corners with eight equivalent Si(1)Si2Ni4W6 cuboctahedra, edges with two equivalent Ni(3)Ni6W6 cuboctahedra, edges with four equivalent Ni(1)Si4Ni2W6 cuboctahedra, faces with four equivalent Si(1)Si2Ni4W6 cuboctahedra, faces with six equivalent Ni(4)Si2Ni4W6 cuboctahedra, and faces with eight equivalent Ni(2)Ni6W6 cuboctahedra. In the fourth Ni site, Ni(4) is bonded to three equivalent W(1), three equivalent W(2), one Ni(1), one Ni(3), two equivalent Ni(2), and two equivalent Si(1) atoms to form NiSi2Ni4W6 cuboctahedra that share corners with two equivalent Ni(3)Ni6W6 cuboctahedra, corners with two equivalent Ni(1)Si4Ni2W6 cuboctahedra, corners with four equivalent Ni(2)Ni6W6 cuboctahedra, corners with four equivalent Si(1)Si2Ni4W6 cuboctahedra, edges with six equivalent Ni(4)Si2Ni4W6 cuboctahedra, faces with two equivalent Ni(4)Si2Ni4W6 cuboctahedra, faces with three equivalent Ni(3)Ni6W6 cuboctahedra, faces with three equivalent Ni(1)Si4Ni2W6 cuboctahedra, faces with six equivalent Ni(2)Ni6W6 cuboctahedra, and faces with six equivalent Si(1)Si2Ni4W6 cuboctahedra. Si(1) is bonded to two equivalent W(1), four equivalent W(2), two equivalent Ni(1), two equivalent Ni(4), and two equivalent Si(1) atoms to form SiSi2Ni4W6 cuboctahedra that share corners with four equivalent Ni(3)Ni6W6 cuboctahedra, corners with four equivalent Ni(4)Si2Ni4W6 cuboctahedra, corners with four equivalent Si(1)Si2Ni4W6 cuboctahedra, corners with six equivalent Ni(2)Ni6W6 cuboctahedra, edges with two equivalent Si(1)Si2Ni4W6 cuboctahedra, edges with four equivalent Ni(2)Ni6W6 cuboctahedra, faces with two equivalent Ni(2)Ni6W6 cuboctahedra, faces with two equivalent Ni(3)Ni6W6 cuboctahedra, faces with four equivalent Ni(1)Si4Ni2W6 cuboctahedra, faces with four equivalent Si(1)Si2Ni4W6 cuboctahedra, and faces with six equivalent Ni(4)Si2Ni4W6 cuboctahedra. is represented by the CIF card [CIF]
data_SiNi3W2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.721
_cell_length_b   4.721
_cell_length_c   7.592
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.333
_symmetry_Int_Tables_number   1
_cell_volume   147.490
_cell_formula_units_Z   2
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
  Si  Si0  1  0.171  0.336  0.000  1.0
  Si  Si1  1  0.664  0.829  0.000  1.0
  Ni  Ni2  1  0.181  0.819  0.000  1.0
  Ni  Ni3  1  0.831  0.661  0.500  1.0
  Ni  Ni4  1  0.339  0.169  0.500  1.0
  Ni  Ni5  1  0.831  0.169  0.500  1.0
  Ni  Ni6  1  0.994  0.006  0.241  1.0
  Ni  Ni7  1  0.994  0.006  0.759  1.0
  W  W8  1  0.334  0.666  0.683  1.0
  W  W9  1  0.664  0.336  0.809  1.0
  W  W10  1  0.664  0.336  0.191  1.0
  W  W11  1  0.334  0.666  0.317  1.0
[/CIF]
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The structure described by W2Ni3Si is Hexagonal Laves-derived structured and crystallizes in the orthorhombic Amm2 space group. There are two inequivalent W sites. In the first W site, W(1) is bonded in a 16-coordinate geometry to one W(1), three equivalent W(2), one Ni(1), two equivalent Ni(3), three equivalent Ni(4), four equivalent Ni(2), and two equivalent Si(1) atoms. In the second W site, W(2) is bonded in a 12-coordinate geometry to three equivalent W(1), one Ni(3), two equivalent Ni(1), two equivalent Ni(2), three equivalent Ni(4), and four equivalent Si(1) atoms. There are four inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to two equivalent W(1), four equivalent W(2), two equivalent Ni(4), and four equivalent Si(1) atoms to form NiSi4Ni2W6 cuboctahedra that share corners with two equivalent Ni(3)Ni6W6 cuboctahedra, corners with four equivalent Ni(4)Si2Ni4W6 cuboctahedra, corners with four equivalent Ni(1)Si4Ni2W6 cuboctahedra, corners with eight equivalent Ni(2)Ni6W6 cuboctahedra, edges with two equivalent Ni(1)Si4Ni2W6 cuboctahedra, edges with four equivalent Ni(3)Ni6W6 cuboctahedra, faces with four equivalent Ni(2)Ni6W6 cuboctahedra, faces with six equivalent Ni(4)Si2Ni4W6 cuboctahedra, and faces with eight equivalent Si(1)Si2Ni4W6 cuboctahedra. In the second Ni site, Ni(2) is bonded to two equivalent W(2), four equivalent W(1), two equivalent Ni(2), two equivalent Ni(3), and two equivalent Ni(4) atoms to form NiNi6W6 cuboctahedra that share corners with four equivalent Ni(2)Ni6W6 cuboctahedra, corners with four equivalent Ni(4)Si2Ni4W6 cuboctahedra, corners with four equivalent Ni(1)Si4Ni2W6 cuboctahedra, corners with six equivalent Si(1)Si2Ni4W6 cuboctahedra, edges with two equivalent Ni(2)Ni6W6 cuboctahedra, edges with four equivalent Si(1)Si2Ni4W6 cuboctahedra, faces with two equivalent Ni(1)Si4Ni2W6 cuboctahedra, faces with two equivalent Si(1)Si2Ni4W6 cuboctahedra, faces with four equivalent Ni(2)Ni6W6 cuboctahedra, faces with four equivalent Ni(3)Ni6W6 cuboctahedra, and faces with six equivalent Ni(4)Si2Ni4W6 cuboctahedra. In the third Ni site, Ni(3) is bonded to two equivalent W(2), four equivalent W(1), two equivalent Ni(4), and four equivalent Ni(2) atoms to form NiNi6W6 cuboctahedra that share corners with two equivalent Ni(1)Si4Ni2W6 cuboctahedra, corners with four equivalent Ni(3)Ni6W6 cuboctahedra, corners with four equivalent Ni(4)Si2Ni4W6 cuboctahedra, corners with eight equivalent Si(1)Si2Ni4W6 cuboctahedra, edges with two equivalent Ni(3)Ni6W6 cuboctahedra, edges with four equivalent Ni(1)Si4Ni2W6 cuboctahedra, faces with four equivalent Si(1)Si2Ni4W6 cuboctahedra, faces with six equivalent Ni(4)Si2Ni4W6 cuboctahedra, and faces with eight equivalent Ni(2)Ni6W6 cuboctahedra. In the fourth Ni site, Ni(4) is bonded to three equivalent W(1), three equivalent W(2), one Ni(1), one Ni(3), two equivalent Ni(2), and two equivalent Si(1) atoms to form NiSi2Ni4W6 cuboctahedra that share corners with two equivalent Ni(3)Ni6W6 cuboctahedra, corners with two equivalent Ni(1)Si4Ni2W6 cuboctahedra, corners with four equivalent Ni(2)Ni6W6 cuboctahedra, corners with four equivalent Si(1)Si2Ni4W6 cuboctahedra, edges with six equivalent Ni(4)Si2Ni4W6 cuboctahedra, faces with two equivalent Ni(4)Si2Ni4W6 cuboctahedra, faces with three equivalent Ni(3)Ni6W6 cuboctahedra, faces with three equivalent Ni(1)Si4Ni2W6 cuboctahedra, faces with six equivalent Ni(2)Ni6W6 cuboctahedra, and faces with six equivalent Si(1)Si2Ni4W6 cuboctahedra. Si(1) is bonded to two equivalent W(1), four equivalent W(2), two equivalent Ni(1), two equivalent Ni(4), and two equivalent Si(1) atoms to form SiSi2Ni4W6 cuboctahedra that share corners with four equivalent Ni(3)Ni6W6 cuboctahedra, corners with four equivalent Ni(4)Si2Ni4W6 cuboctahedra, corners with four equivalent Si(1)Si2Ni4W6 cuboctahedra, corners with six equivalent Ni(2)Ni6W6 cuboctahedra, edges with two equivalent Si(1)Si2Ni4W6 cuboctahedra, edges with four equivalent Ni(2)Ni6W6 cuboctahedra, faces with two equivalent Ni(2)Ni6W6 cuboctahedra, faces with two equivalent Ni(3)Ni6W6 cuboctahedra, faces with four equivalent Ni(1)Si4Ni2W6 cuboctahedra, faces with four equivalent Si(1)Si2Ni4W6 cuboctahedra, and faces with six equivalent Ni(4)Si2Ni4W6 cuboctahedra. is represented by the CIF card [CIF]
data_SiNi3W2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.721
_cell_length_b   4.721
_cell_length_c   7.592
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.333
_symmetry_Int_Tables_number   1
_cell_volume   147.490
_cell_formula_units_Z   2
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
  Si  Si0  1  0.171  0.336  0.000  1.0
  Si  Si1  1  0.664  0.829  0.000  1.0
  Ni  Ni2  1  0.181  0.819  0.000  1.0
  Ni  Ni3  1  0.831  0.661  0.500  1.0
  Ni  Ni4  1  0.339  0.169  0.500  1.0
  Ni  Ni5  1  0.831  0.169  0.500  1.0
  Ni  Ni6  1  0.994  0.006  0.241  1.0
  Ni  Ni7  1  0.994  0.006  0.759  1.0
  W  W8  1  0.334  0.666  0.683  1.0
  W  W9  1  0.664  0.336  0.809  1.0
  W  W10  1  0.664  0.336  0.191  1.0
  W  W11  1  0.334  0.666  0.317  1.0
[/CIF]
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