The compound described by TaCoNi2 is beta Cu3Ti-derived structured and crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to four Co(1,1,1,1); two equivalent Ni(1); two equivalent Ni(3); and four Ni(2,2) atoms to form TaCo4Ni8 cuboctahedra that share corners with four equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; corners with six equivalent Ta(1)Co4Ni8 cuboctahedra; corners with eight Co(1,1,1,1)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; edges with four Co(1,1,1,1)Ta4Co2Ni6 cuboctahedra; edges with four equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; edges with eight Ni(2,2)Ta4Co2Ni6 cuboctahedra; faces with two equivalent Ta(1)Co4Ni8 cuboctahedra; faces with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; faces with four Co(1,1,1,1)Ta4Co2Ni6 cuboctahedra; faces with four Ni(2,2)Ta4Co2Ni6 cuboctahedra; and faces with six equivalent Ta(2)Co4Ni8 cuboctahedra. In the second Ta site, Ta(2) is bonded to four Co(1,1); two equivalent Ni(1); two equivalent Ni(3); and four Ni(2,2) atoms to form TaCo4Ni8 cuboctahedra that share corners with four equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; corners with six equivalent Ta(2)Co4Ni8 cuboctahedra; corners with eight Ni(2,2)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; edges with four Ni(2,2)Ta4Co2Ni6 cuboctahedra; edges with four equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; edges with eight Co(1,1,1,1)Ta4Co2Ni6 cuboctahedra; faces with two equivalent Ta(2)Co4Ni8 cuboctahedra; faces with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; faces with four Co(1,1)Ta4Co2Ni6 cuboctahedra; faces with four Ni(2,2)Ta4Co2Ni6 cuboctahedra; and faces with six equivalent Ta(1)Co4Ni8 cuboctahedra. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent Ta(1), two equivalent Ta(2), two equivalent Co(1), two equivalent Ni(1), two equivalent Ni(2), and two equivalent Ni(3) atoms to form distorted CoTa4Co2Ni6 cuboctahedra that share corners with four equivalent Ta(1)Co4Ni8 cuboctahedra; corners with four equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; corners with ten Co(1,1,1)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ta(1)Co4Ni8 cuboctahedra; edges with two equivalent Co(1)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; edges with four equivalent Ta(2)Co4Ni8 cuboctahedra; edges with four equivalent Ni(2)Ta4Co2Ni6 cuboctahedra; edges with four equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ta(1)Co4Ni8 cuboctahedra; faces with two equivalent Ta(2)Co4Ni8 cuboctahedra; faces with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; faces with four Co(1,1)Ta4Co2Ni6 cuboctahedra; and faces with eight Ni(2,2)Ta4Co2Ni6 cuboctahedra. In the second Co site, Co(1) is bonded to two equivalent Ta(1), two equivalent Ta(2), two equivalent Co(1), two equivalent Ni(1), two equivalent Ni(2), and two equivalent Ni(3) atoms to form distorted CoTa4Co2Ni6 cuboctahedra that share corners with four equivalent Ta(1)Co4Ni8 cuboctahedra; corners with four equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; corners with ten Co(1,1,1)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ta(1)Co4Ni8 cuboctahedra; edges with two equivalent Co(1)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; edges with four equivalent Ta(2)Co4Ni8 cuboctahedra; edges with four equivalent Ni(2)Ta4Co2Ni6 cuboctahedra; edges with four equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ta(1)Co4Ni8 cuboctahedra; faces with two equivalent Ta(2)Co4Ni8 cuboctahedra; faces with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; faces with four Co(1,1)Ta4Co2Ni6 cuboctahedra; and faces with eight Ni(2,2)Ta4Co2Ni6 cuboctahedra. In the third Co site, Co(1) is bonded to two equivalent Ta(1), two equivalent Ta(2), two equivalent Co(1), two equivalent Ni(1), two equivalent Ni(2), and two equivalent Ni(3) atoms to form distorted CoTa4Co2Ni6 cuboctahedra that share corners with four equivalent Ta(1)Co4Ni8 cuboctahedra; corners with four equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; corners with ten Co(1,1,1)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ta(1)Co4Ni8 cuboctahedra; edges with two equivalent Co(1)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; edges with four equivalent Ta(2)Co4Ni8 cuboctahedra; edges with four equivalent Ni(2)Ta4Co2Ni6 cuboctahedra; edges with four equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ta(1)Co4Ni8 cuboctahedra; faces with two equivalent Ta(2)Co4Ni8 cuboctahedra; faces with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; faces with four Co(1,1)Ta4Co2Ni6 cuboctahedra; and faces with eight Ni(2,2)Ta4Co2Ni6 cuboctahedra. In the fourth Co site, Co(1) is bonded to two equivalent Ta(1), two equivalent Ta(2), two equivalent Co(1), two equivalent Ni(1), two equivalent Ni(2), and two equivalent Ni(3) atoms to form distorted CoTa4Co2Ni6 cuboctahedra that share corners with four equivalent Ta(1)Co4Ni8 cuboctahedra; corners with four equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; corners with ten Co(1,1,1)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ta(1)Co4Ni8 cuboctahedra; edges with two equivalent Co(1)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; edges with four equivalent Ta(2)Co4Ni8 cuboctahedra; edges with four equivalent Ni(2)Ta4Co2Ni6 cuboctahedra; edges with four equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ta(1)Co4Ni8 cuboctahedra; faces with two equivalent Ta(2)Co4Ni8 cuboctahedra; faces with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; faces with four Co(1,1)Ta4Co2Ni6 cuboctahedra; and faces with eight Ni(2,2)Ta4Co2Ni6 cuboctahedra. There are four inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to two equivalent Ta(1); two equivalent Ta(2); four Co(1,1,1,1); and four Ni(2,2) atoms to form NiTa4Co4Ni4 cuboctahedra that share corners with four equivalent Ta(1)Co4Ni8 cuboctahedra; corners with six equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; corners with eight Co(1,1,1,1)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ta(1)Co4Ni8 cuboctahedra; edges with four equivalent Ta(2)Co4Ni8 cuboctahedra; edges with four Co(1,1,1,1)Ta4Co2Ni6 cuboctahedra; edges with eight Ni(2,2)Ta4Co2Ni6 cuboctahedra; faces with two equivalent Ta(1)Co4Ni8 cuboctahedra; faces with two equivalent Ta(2)Co4Ni8 cuboctahedra; faces with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; faces with four Co(1,1,1,1)Ta4Co2Ni6 cuboctahedra; faces with four Ni(2,2)Ta4Co2Ni6 cuboctahedra; and faces with six equivalent Ni(3)Ta4Co4Ni4 cuboctahedra. In the second Ni site, Ni(2) is bonded to two equivalent Ta(1), two equivalent Ta(2), two equivalent Co(1), two equivalent Ni(1), two equivalent Ni(2), and two equivalent Ni(3) atoms to form distorted NiTa4Co2Ni6 cuboctahedra that share corners with four equivalent Ta(2)Co4Ni8 cuboctahedra; corners with four equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; corners with ten Ni(2,2)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ta(2)Co4Ni8 cuboctahedra; edges with two equivalent Ni(2)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; edges with four equivalent Ta(1)Co4Ni8 cuboctahedra; edges with four equivalent Co(1)Ta4Co2Ni6 cuboctahedra; edges with four equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ta(1)Co4Ni8 cuboctahedra; faces with two equivalent Ta(2)Co4Ni8 cuboctahedra; faces with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; faces with four Ni(2,2)Ta4Co2Ni6 cuboctahedra; and faces with eight Co(1,1,1)Ta4Co2Ni6 cuboctahedra. In the third Ni site, Ni(2) is bonded to two equivalent Ta(1), two equivalent Ta(2), two equivalent Co(1), two equivalent Ni(1), two equivalent Ni(2), and two equivalent Ni(3) atoms to form distorted NiTa4Co2Ni6 cuboctahedra that share corners with four equivalent Ta(2)Co4Ni8 cuboctahedra; corners with four equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; corners with ten Ni(2,2)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ta(2)Co4Ni8 cuboctahedra; edges with two equivalent Ni(2)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; edges with four equivalent Ta(1)Co4Ni8 cuboctahedra; edges with four equivalent Co(1)Ta4Co2Ni6 cuboctahedra; edges with four equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ta(1)Co4Ni8 cuboctahedra; faces with two equivalent Ta(2)Co4Ni8 cuboctahedra; faces with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; faces with four Ni(2,2)Ta4Co2Ni6 cuboctahedra; and faces with eight Co(1,1,1)Ta4Co2Ni6 cuboctahedra. In the fourth Ni site, Ni(3) is bonded to two equivalent Ta(1); two equivalent Ta(2); four Co(1,1); and four Ni(2,2) atoms to form distorted NiTa4Co4Ni4 cuboctahedra that share corners with four equivalent Ta(2)Co4Ni8 cuboctahedra; corners with six equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; corners with eight Ni(2,2)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ta(2)Co4Ni8 cuboctahedra; edges with four equivalent Ta(1)Co4Ni8 cuboctahedra; edges with four Ni(2,2)Ta4Co2Ni6 cuboctahedra; edges with eight Co(1,1,1,1)Ta4Co2Ni6 cuboctahedra; faces with two equivalent Ta(1)Co4Ni8 cuboctahedra; faces with two equivalent Ta(2)Co4Ni8 cuboctahedra; faces with two equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; faces with four Co(1,1)Ta4Co2Ni6 cuboctahedra; faces with four Ni(2,2)Ta4Co2Ni6 cuboctahedra; and faces with six equivalent Ni(1)Ta4Co4Ni4 cuboctahedra. is represented by the CIF card [CIF]
data_TaCoNi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.114
_cell_length_b   5.114
_cell_length_c   4.147
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.082
_symmetry_Int_Tables_number   1
_cell_volume   94.791
_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
  Ta  Ta0  1  0.338  0.662  0.000  1.0
  Ta  Ta1  1  0.662  0.338  0.500  1.0
  Co  Co2  1  0.844  0.681  0.000  1.0
  Co  Co3  1  0.319  0.156  0.000  1.0
  Ni  Ni4  1  0.840  0.160  0.000  1.0
  Ni  Ni5  1  0.156  0.319  0.500  1.0
  Ni  Ni6  1  0.681  0.844  0.500  1.0
  Ni  Ni7  1  0.160  0.840  0.500  1.0
[/CIF]
.
The compound described by TaCoNi2 is beta Cu3Ti-derived structured and crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded to four Co(1,1,1,1); two equivalent Ni(1); two equivalent Ni(3); and four Ni(2,2) atoms to form TaCo4Ni8 cuboctahedra that share corners with four equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; corners with six equivalent Ta(1)Co4Ni8 cuboctahedra; corners with eight Co(1,1,1,1)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; edges with four Co(1,1,1,1)Ta4Co2Ni6 cuboctahedra; edges with four equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; edges with eight Ni(2,2)Ta4Co2Ni6 cuboctahedra; faces with two equivalent Ta(1)Co4Ni8 cuboctahedra; faces with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; faces with four Co(1,1,1,1)Ta4Co2Ni6 cuboctahedra; faces with four Ni(2,2)Ta4Co2Ni6 cuboctahedra; and faces with six equivalent Ta(2)Co4Ni8 cuboctahedra. In the second Ta site, Ta(2) is bonded to four Co(1,1); two equivalent Ni(1); two equivalent Ni(3); and four Ni(2,2) atoms to form TaCo4Ni8 cuboctahedra that share corners with four equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; corners with six equivalent Ta(2)Co4Ni8 cuboctahedra; corners with eight Ni(2,2)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; edges with four Ni(2,2)Ta4Co2Ni6 cuboctahedra; edges with four equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; edges with eight Co(1,1,1,1)Ta4Co2Ni6 cuboctahedra; faces with two equivalent Ta(2)Co4Ni8 cuboctahedra; faces with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; faces with four Co(1,1)Ta4Co2Ni6 cuboctahedra; faces with four Ni(2,2)Ta4Co2Ni6 cuboctahedra; and faces with six equivalent Ta(1)Co4Ni8 cuboctahedra. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent Ta(1), two equivalent Ta(2), two equivalent Co(1), two equivalent Ni(1), two equivalent Ni(2), and two equivalent Ni(3) atoms to form distorted CoTa4Co2Ni6 cuboctahedra that share corners with four equivalent Ta(1)Co4Ni8 cuboctahedra; corners with four equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; corners with ten Co(1,1,1)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ta(1)Co4Ni8 cuboctahedra; edges with two equivalent Co(1)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; edges with four equivalent Ta(2)Co4Ni8 cuboctahedra; edges with four equivalent Ni(2)Ta4Co2Ni6 cuboctahedra; edges with four equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ta(1)Co4Ni8 cuboctahedra; faces with two equivalent Ta(2)Co4Ni8 cuboctahedra; faces with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; faces with four Co(1,1)Ta4Co2Ni6 cuboctahedra; and faces with eight Ni(2,2)Ta4Co2Ni6 cuboctahedra. In the second Co site, Co(1) is bonded to two equivalent Ta(1), two equivalent Ta(2), two equivalent Co(1), two equivalent Ni(1), two equivalent Ni(2), and two equivalent Ni(3) atoms to form distorted CoTa4Co2Ni6 cuboctahedra that share corners with four equivalent Ta(1)Co4Ni8 cuboctahedra; corners with four equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; corners with ten Co(1,1,1)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ta(1)Co4Ni8 cuboctahedra; edges with two equivalent Co(1)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; edges with four equivalent Ta(2)Co4Ni8 cuboctahedra; edges with four equivalent Ni(2)Ta4Co2Ni6 cuboctahedra; edges with four equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ta(1)Co4Ni8 cuboctahedra; faces with two equivalent Ta(2)Co4Ni8 cuboctahedra; faces with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; faces with four Co(1,1)Ta4Co2Ni6 cuboctahedra; and faces with eight Ni(2,2)Ta4Co2Ni6 cuboctahedra. In the third Co site, Co(1) is bonded to two equivalent Ta(1), two equivalent Ta(2), two equivalent Co(1), two equivalent Ni(1), two equivalent Ni(2), and two equivalent Ni(3) atoms to form distorted CoTa4Co2Ni6 cuboctahedra that share corners with four equivalent Ta(1)Co4Ni8 cuboctahedra; corners with four equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; corners with ten Co(1,1,1)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ta(1)Co4Ni8 cuboctahedra; edges with two equivalent Co(1)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; edges with four equivalent Ta(2)Co4Ni8 cuboctahedra; edges with four equivalent Ni(2)Ta4Co2Ni6 cuboctahedra; edges with four equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ta(1)Co4Ni8 cuboctahedra; faces with two equivalent Ta(2)Co4Ni8 cuboctahedra; faces with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; faces with four Co(1,1)Ta4Co2Ni6 cuboctahedra; and faces with eight Ni(2,2)Ta4Co2Ni6 cuboctahedra. In the fourth Co site, Co(1) is bonded to two equivalent Ta(1), two equivalent Ta(2), two equivalent Co(1), two equivalent Ni(1), two equivalent Ni(2), and two equivalent Ni(3) atoms to form distorted CoTa4Co2Ni6 cuboctahedra that share corners with four equivalent Ta(1)Co4Ni8 cuboctahedra; corners with four equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; corners with ten Co(1,1,1)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ta(1)Co4Ni8 cuboctahedra; edges with two equivalent Co(1)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; edges with four equivalent Ta(2)Co4Ni8 cuboctahedra; edges with four equivalent Ni(2)Ta4Co2Ni6 cuboctahedra; edges with four equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ta(1)Co4Ni8 cuboctahedra; faces with two equivalent Ta(2)Co4Ni8 cuboctahedra; faces with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; faces with four Co(1,1)Ta4Co2Ni6 cuboctahedra; and faces with eight Ni(2,2)Ta4Co2Ni6 cuboctahedra. There are four inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to two equivalent Ta(1); two equivalent Ta(2); four Co(1,1,1,1); and four Ni(2,2) atoms to form NiTa4Co4Ni4 cuboctahedra that share corners with four equivalent Ta(1)Co4Ni8 cuboctahedra; corners with six equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; corners with eight Co(1,1,1,1)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ta(1)Co4Ni8 cuboctahedra; edges with four equivalent Ta(2)Co4Ni8 cuboctahedra; edges with four Co(1,1,1,1)Ta4Co2Ni6 cuboctahedra; edges with eight Ni(2,2)Ta4Co2Ni6 cuboctahedra; faces with two equivalent Ta(1)Co4Ni8 cuboctahedra; faces with two equivalent Ta(2)Co4Ni8 cuboctahedra; faces with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; faces with four Co(1,1,1,1)Ta4Co2Ni6 cuboctahedra; faces with four Ni(2,2)Ta4Co2Ni6 cuboctahedra; and faces with six equivalent Ni(3)Ta4Co4Ni4 cuboctahedra. In the second Ni site, Ni(2) is bonded to two equivalent Ta(1), two equivalent Ta(2), two equivalent Co(1), two equivalent Ni(1), two equivalent Ni(2), and two equivalent Ni(3) atoms to form distorted NiTa4Co2Ni6 cuboctahedra that share corners with four equivalent Ta(2)Co4Ni8 cuboctahedra; corners with four equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; corners with ten Ni(2,2)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ta(2)Co4Ni8 cuboctahedra; edges with two equivalent Ni(2)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; edges with four equivalent Ta(1)Co4Ni8 cuboctahedra; edges with four equivalent Co(1)Ta4Co2Ni6 cuboctahedra; edges with four equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ta(1)Co4Ni8 cuboctahedra; faces with two equivalent Ta(2)Co4Ni8 cuboctahedra; faces with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; faces with four Ni(2,2)Ta4Co2Ni6 cuboctahedra; and faces with eight Co(1,1,1)Ta4Co2Ni6 cuboctahedra. In the third Ni site, Ni(2) is bonded to two equivalent Ta(1), two equivalent Ta(2), two equivalent Co(1), two equivalent Ni(1), two equivalent Ni(2), and two equivalent Ni(3) atoms to form distorted NiTa4Co2Ni6 cuboctahedra that share corners with four equivalent Ta(2)Co4Ni8 cuboctahedra; corners with four equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; corners with ten Ni(2,2)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ta(2)Co4Ni8 cuboctahedra; edges with two equivalent Ni(2)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; edges with four equivalent Ta(1)Co4Ni8 cuboctahedra; edges with four equivalent Co(1)Ta4Co2Ni6 cuboctahedra; edges with four equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ta(1)Co4Ni8 cuboctahedra; faces with two equivalent Ta(2)Co4Ni8 cuboctahedra; faces with two equivalent Ni(1)Ta4Co4Ni4 cuboctahedra; faces with two equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; faces with four Ni(2,2)Ta4Co2Ni6 cuboctahedra; and faces with eight Co(1,1,1)Ta4Co2Ni6 cuboctahedra. In the fourth Ni site, Ni(3) is bonded to two equivalent Ta(1); two equivalent Ta(2); four Co(1,1); and four Ni(2,2) atoms to form distorted NiTa4Co4Ni4 cuboctahedra that share corners with four equivalent Ta(2)Co4Ni8 cuboctahedra; corners with six equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; corners with eight Ni(2,2)Ta4Co2Ni6 cuboctahedra; edges with two equivalent Ta(2)Co4Ni8 cuboctahedra; edges with four equivalent Ta(1)Co4Ni8 cuboctahedra; edges with four Ni(2,2)Ta4Co2Ni6 cuboctahedra; edges with eight Co(1,1,1,1)Ta4Co2Ni6 cuboctahedra; faces with two equivalent Ta(1)Co4Ni8 cuboctahedra; faces with two equivalent Ta(2)Co4Ni8 cuboctahedra; faces with two equivalent Ni(3)Ta4Co4Ni4 cuboctahedra; faces with four Co(1,1)Ta4Co2Ni6 cuboctahedra; faces with four Ni(2,2)Ta4Co2Ni6 cuboctahedra; and faces with six equivalent Ni(1)Ta4Co4Ni4 cuboctahedra. is represented by the CIF card [CIF]
data_TaCoNi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.114
_cell_length_b   5.114
_cell_length_c   4.147
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.082
_symmetry_Int_Tables_number   1
_cell_volume   94.791
_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
  Ta  Ta0  1  0.338  0.662  0.000  1.0
  Ta  Ta1  1  0.662  0.338  0.500  1.0
  Co  Co2  1  0.844  0.681  0.000  1.0
  Co  Co3  1  0.319  0.156  0.000  1.0
  Ni  Ni4  1  0.840  0.160  0.000  1.0
  Ni  Ni5  1  0.156  0.319  0.500  1.0
  Ni  Ni6  1  0.681  0.844  0.500  1.0
  Ni  Ni7  1  0.160  0.840  0.500  1.0
[/CIF]
.