The structure described by Co2NiAl is beta Cu3Ti-derived structured and crystallizes in the tetragonal I4/mmm space group. Co(1) is bonded to four equivalent Co(1), four equivalent Ni(1), and four equivalent Al(1) atoms to form CoAl4Co4Ni4 cuboctahedra that share corners with twelve equivalent Co(1)Al4Co4Ni4 cuboctahedra, edges with eight equivalent Co(1)Al4Co4Ni4 cuboctahedra, edges with eight equivalent Ni(1)Al4Co8 cuboctahedra, edges with eight equivalent Al(1)Co8Ni4 cuboctahedra, faces with four equivalent Ni(1)Al4Co8 cuboctahedra, faces with four equivalent Al(1)Co8Ni4 cuboctahedra, and faces with ten equivalent Co(1)Al4Co4Ni4 cuboctahedra. Ni(1) is bonded to eight equivalent Co(1) and four equivalent Al(1) atoms to form NiAl4Co8 cuboctahedra that share corners with four equivalent Ni(1)Al4Co8 cuboctahedra, corners with eight equivalent Al(1)Co8Ni4 cuboctahedra, edges with eight equivalent Ni(1)Al4Co8 cuboctahedra, edges with sixteen equivalent Co(1)Al4Co4Ni4 cuboctahedra, faces with four equivalent Ni(1)Al4Co8 cuboctahedra, faces with six equivalent Al(1)Co8Ni4 cuboctahedra, and faces with eight equivalent Co(1)Al4Co4Ni4 cuboctahedra. Al(1) is bonded to eight equivalent Co(1) and four equivalent Ni(1) atoms to form AlCo8Ni4 cuboctahedra that share corners with four equivalent Al(1)Co8Ni4 cuboctahedra, corners with eight equivalent Ni(1)Al4Co8 cuboctahedra, edges with eight equivalent Al(1)Co8Ni4 cuboctahedra, edges with sixteen equivalent Co(1)Al4Co4Ni4 cuboctahedra, faces with four equivalent Al(1)Co8Ni4 cuboctahedra, faces with six equivalent Ni(1)Al4Co8 cuboctahedra, and faces with eight equivalent Co(1)Al4Co4Ni4 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_AlCo2Ni
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.360
_cell_length_b   4.360
_cell_length_c   4.360
_cell_angle_alpha   131.686
_cell_angle_beta   131.686
_cell_angle_gamma   70.725
_symmetry_Int_Tables_number   1
_cell_volume   45.294
_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  0.000  1.0
  Co  Co1  1  0.750  0.250  0.500  1.0
  Co  Co2  1  0.250  0.750  0.500  1.0
  Ni  Ni3  1  0.500  0.500  0.000  1.0
[/CIF]
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The structure described by Co2NiAl is beta Cu3Ti-derived structured and crystallizes in the tetragonal I4/mmm space group. Co(1) is bonded to four equivalent Co(1), four equivalent Ni(1), and four equivalent Al(1) atoms to form CoAl4Co4Ni4 cuboctahedra that share corners with twelve equivalent Co(1)Al4Co4Ni4 cuboctahedra, edges with eight equivalent Co(1)Al4Co4Ni4 cuboctahedra, edges with eight equivalent Ni(1)Al4Co8 cuboctahedra, edges with eight equivalent Al(1)Co8Ni4 cuboctahedra, faces with four equivalent Ni(1)Al4Co8 cuboctahedra, faces with four equivalent Al(1)Co8Ni4 cuboctahedra, and faces with ten equivalent Co(1)Al4Co4Ni4 cuboctahedra. Ni(1) is bonded to eight equivalent Co(1) and four equivalent Al(1) atoms to form NiAl4Co8 cuboctahedra that share corners with four equivalent Ni(1)Al4Co8 cuboctahedra, corners with eight equivalent Al(1)Co8Ni4 cuboctahedra, edges with eight equivalent Ni(1)Al4Co8 cuboctahedra, edges with sixteen equivalent Co(1)Al4Co4Ni4 cuboctahedra, faces with four equivalent Ni(1)Al4Co8 cuboctahedra, faces with six equivalent Al(1)Co8Ni4 cuboctahedra, and faces with eight equivalent Co(1)Al4Co4Ni4 cuboctahedra. Al(1) is bonded to eight equivalent Co(1) and four equivalent Ni(1) atoms to form AlCo8Ni4 cuboctahedra that share corners with four equivalent Al(1)Co8Ni4 cuboctahedra, corners with eight equivalent Ni(1)Al4Co8 cuboctahedra, edges with eight equivalent Al(1)Co8Ni4 cuboctahedra, edges with sixteen equivalent Co(1)Al4Co4Ni4 cuboctahedra, faces with four equivalent Al(1)Co8Ni4 cuboctahedra, faces with six equivalent Ni(1)Al4Co8 cuboctahedra, and faces with eight equivalent Co(1)Al4Co4Ni4 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_AlCo2Ni
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.360
_cell_length_b   4.360
_cell_length_c   4.360
_cell_angle_alpha   131.686
_cell_angle_beta   131.686
_cell_angle_gamma   70.725
_symmetry_Int_Tables_number   1
_cell_volume   45.294
_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  0.000  1.0
  Co  Co1  1  0.750  0.250  0.500  1.0
  Co  Co2  1  0.250  0.750  0.500  1.0
  Ni  Ni3  1  0.500  0.500  0.000  1.0
[/CIF]
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