The structure described by TiNiCu2O4 crystallizes in the trigonal R-3m space group. Ti(1) is bonded to six equivalent O(2) atoms to form edge-sharing TiO6 octahedra. Ni(1) is bonded to six equivalent O(1) atoms to form edge-sharing NiO6 octahedra. Cu(1) is bonded in a linear geometry to one O(1) and one O(2) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Ni(1) and one Cu(1) atom to form distorted OCuNi3 trigonal pyramids that share  a cornercorner with one O(2)Ti3Cu trigonal pyramid, corners with nine equivalent O(1)CuNi3 trigonal pyramids, and edges with three equivalent O(1)CuNi3 trigonal pyramids. In the second O site, O(2) is bonded to three equivalent Ti(1) and one Cu(1) atom to form distorted OTi3Cu trigonal pyramids that share  a cornercorner with one O(1)CuNi3 trigonal pyramid, corners with nine equivalent O(2)Ti3Cu trigonal pyramids, and edges with three equivalent O(2)Ti3Cu trigonal pyramids. In the third O site, O(2) is bonded to three equivalent Ti(1) and one Cu(1) atom to form distorted OTi3Cu trigonal pyramids that share  a cornercorner with one O(1)CuNi3 trigonal pyramid; corners with nine O(2,2)Ti3Cu trigonal pyramids; and edges with three equivalent O(2)Ti3Cu trigonal pyramids. In the fourth O site, O(2) is bonded to three equivalent Ti(1) and one Cu(1) atom to form distorted OTi3Cu trigonal pyramids that share  a cornercorner with one O(1)CuNi3 trigonal pyramid; corners with nine O(2,2)Ti3Cu trigonal pyramids; and edges with three equivalent O(2)Ti3Cu trigonal pyramids. is represented by the CIF card [CIF]
data_TiCu2NiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.648
_cell_length_b   11.648
_cell_length_c   11.648
_cell_angle_alpha   14.904
_cell_angle_beta   14.904
_cell_angle_gamma   14.904
_symmetry_Int_Tables_number   1
_cell_volume   91.048
_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
  Ti  Ti0  1  0.000  0.000  0.000  1.0
  Cu  Cu1  1  0.752  0.752  0.752  1.0
  Cu  Cu2  1  0.248  0.248  0.248  1.0
  Ni  Ni3  1  0.500  0.500  0.500  1.0
  O  O4  1  0.197  0.197  0.197  1.0
  O  O5  1  0.697  0.697  0.697  1.0
  O  O6  1  0.803  0.803  0.803  1.0
  O  O7  1  0.303  0.303  0.303  1.0
[/CIF]
.
The structure described by TiNiCu2O4 crystallizes in the trigonal R-3m space group. Ti(1) is bonded to six equivalent O(2) atoms to form edge-sharing TiO6 octahedra. Ni(1) is bonded to six equivalent O(1) atoms to form edge-sharing NiO6 octahedra. Cu(1) is bonded in a linear geometry to one O(1) and one O(2) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Ni(1) and one Cu(1) atom to form distorted OCuNi3 trigonal pyramids that share  a cornercorner with one O(2)Ti3Cu trigonal pyramid, corners with nine equivalent O(1)CuNi3 trigonal pyramids, and edges with three equivalent O(1)CuNi3 trigonal pyramids. In the second O site, O(2) is bonded to three equivalent Ti(1) and one Cu(1) atom to form distorted OTi3Cu trigonal pyramids that share  a cornercorner with one O(1)CuNi3 trigonal pyramid, corners with nine equivalent O(2)Ti3Cu trigonal pyramids, and edges with three equivalent O(2)Ti3Cu trigonal pyramids. In the third O site, O(2) is bonded to three equivalent Ti(1) and one Cu(1) atom to form distorted OTi3Cu trigonal pyramids that share  a cornercorner with one O(1)CuNi3 trigonal pyramid; corners with nine O(2,2)Ti3Cu trigonal pyramids; and edges with three equivalent O(2)Ti3Cu trigonal pyramids. In the fourth O site, O(2) is bonded to three equivalent Ti(1) and one Cu(1) atom to form distorted OTi3Cu trigonal pyramids that share  a cornercorner with one O(1)CuNi3 trigonal pyramid; corners with nine O(2,2)Ti3Cu trigonal pyramids; and edges with three equivalent O(2)Ti3Cu trigonal pyramids. is represented by the CIF card [CIF]
data_TiCu2NiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.648
_cell_length_b   11.648
_cell_length_c   11.648
_cell_angle_alpha   14.904
_cell_angle_beta   14.904
_cell_angle_gamma   14.904
_symmetry_Int_Tables_number   1
_cell_volume   91.048
_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
  Ti  Ti0  1  0.000  0.000  0.000  1.0
  Cu  Cu1  1  0.752  0.752  0.752  1.0
  Cu  Cu2  1  0.248  0.248  0.248  1.0
  Ni  Ni3  1  0.500  0.500  0.500  1.0
  O  O4  1  0.197  0.197  0.197  1.0
  O  O5  1  0.697  0.697  0.697  1.0
  O  O6  1  0.803  0.803  0.803  1.0
  O  O7  1  0.303  0.303  0.303  1.0
[/CIF]
.