The structure described by CuTa2O6 crystallizes in the orthorhombic Pmmm space group. Ta(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form corner-sharing TaO6 octahedra. The corner-sharing octahedral tilt angles range from 30-43°. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. In the second Cu site, Cu(2) is bonded in a square co-planar geometry to four equivalent O(2) atoms. In the third Cu site, Cu(3) is bonded in a square co-planar geometry to four equivalent O(4) atoms. In the fourth Cu site, Cu(4) is bonded in a square co-planar geometry to four equivalent O(5) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to two equivalent Ta(1) and one Cu(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Ta(1) and one Cu(2) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to two equivalent Ta(1) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Ta(1) and one Cu(3) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to two equivalent Ta(1) and one Cu(4) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to two equivalent Ta(1) atoms. is represented by the CIF card [CIF]
data_Ta2CuO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.547
_cell_length_b   7.566
_cell_length_c   7.608
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   434.374
_cell_formula_units_Z   4
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  0.248  0.256  0.250  1.0
  Ta  Ta1  1  0.248  0.256  0.750  1.0
  Ta  Ta2  1  0.248  0.744  0.250  1.0
  Ta  Ta3  1  0.248  0.744  0.750  1.0
  Ta  Ta4  1  0.752  0.256  0.250  1.0
  Ta  Ta5  1  0.752  0.256  0.750  1.0
  Ta  Ta6  1  0.752  0.744  0.250  1.0
  Ta  Ta7  1  0.752  0.744  0.750  1.0
  Cu  Cu8  1  0.500  0.000  0.500  1.0
  Cu  Cu9  1  0.500  0.500  0.000  1.0
  Cu  Cu10  1  0.000  0.000  0.000  1.0
  Cu  Cu11  1  0.000  0.000  0.500  1.0
  O  O12  1  0.500  0.820  0.688  1.0
  O  O13  1  0.500  0.820  0.312  1.0
  O  O14  1  0.320  0.308  0.000  1.0
  O  O15  1  0.320  0.692  0.000  1.0
  O  O16  1  0.298  0.500  0.694  1.0
  O  O17  1  0.298  0.500  0.306  1.0
  O  O18  1  0.191  0.000  0.821  1.0
  O  O19  1  0.191  0.000  0.179  1.0
  O  O20  1  0.185  0.812  0.500  1.0
  O  O21  1  0.185  0.188  0.500  1.0
  O  O22  1  0.000  0.698  0.796  1.0
  O  O23  1  0.000  0.302  0.204  1.0
  O  O24  1  0.000  0.302  0.796  1.0
  O  O25  1  0.000  0.698  0.204  1.0
  O  O26  1  0.815  0.188  0.500  1.0
  O  O27  1  0.815  0.812  0.500  1.0
  O  O28  1  0.809  0.000  0.821  1.0
  O  O29  1  0.809  0.000  0.179  1.0
  O  O30  1  0.702  0.500  0.694  1.0
  O  O31  1  0.702  0.500  0.306  1.0
  O  O32  1  0.680  0.308  0.000  1.0
  O  O33  1  0.680  0.692  0.000  1.0
  O  O34  1  0.500  0.180  0.688  1.0
  O  O35  1  0.500  0.180  0.312  1.0
[/CIF]
.
The structure described by CuTa2O6 crystallizes in the orthorhombic Pmmm space group. Ta(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form corner-sharing TaO6 octahedra. The corner-sharing octahedral tilt angles range from 30-43°. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. In the second Cu site, Cu(2) is bonded in a square co-planar geometry to four equivalent O(2) atoms. In the third Cu site, Cu(3) is bonded in a square co-planar geometry to four equivalent O(4) atoms. In the fourth Cu site, Cu(4) is bonded in a square co-planar geometry to four equivalent O(5) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to two equivalent Ta(1) and one Cu(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Ta(1) and one Cu(2) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to two equivalent Ta(1) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Ta(1) and one Cu(3) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to two equivalent Ta(1) and one Cu(4) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to two equivalent Ta(1) atoms. is represented by the CIF card [CIF]
data_Ta2CuO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.547
_cell_length_b   7.566
_cell_length_c   7.608
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   434.374
_cell_formula_units_Z   4
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  0.248  0.256  0.250  1.0
  Ta  Ta1  1  0.248  0.256  0.750  1.0
  Ta  Ta2  1  0.248  0.744  0.250  1.0
  Ta  Ta3  1  0.248  0.744  0.750  1.0
  Ta  Ta4  1  0.752  0.256  0.250  1.0
  Ta  Ta5  1  0.752  0.256  0.750  1.0
  Ta  Ta6  1  0.752  0.744  0.250  1.0
  Ta  Ta7  1  0.752  0.744  0.750  1.0
  Cu  Cu8  1  0.500  0.000  0.500  1.0
  Cu  Cu9  1  0.500  0.500  0.000  1.0
  Cu  Cu10  1  0.000  0.000  0.000  1.0
  Cu  Cu11  1  0.000  0.000  0.500  1.0
  O  O12  1  0.500  0.820  0.688  1.0
  O  O13  1  0.500  0.820  0.312  1.0
  O  O14  1  0.320  0.308  0.000  1.0
  O  O15  1  0.320  0.692  0.000  1.0
  O  O16  1  0.298  0.500  0.694  1.0
  O  O17  1  0.298  0.500  0.306  1.0
  O  O18  1  0.191  0.000  0.821  1.0
  O  O19  1  0.191  0.000  0.179  1.0
  O  O20  1  0.185  0.812  0.500  1.0
  O  O21  1  0.185  0.188  0.500  1.0
  O  O22  1  0.000  0.698  0.796  1.0
  O  O23  1  0.000  0.302  0.204  1.0
  O  O24  1  0.000  0.302  0.796  1.0
  O  O25  1  0.000  0.698  0.204  1.0
  O  O26  1  0.815  0.188  0.500  1.0
  O  O27  1  0.815  0.812  0.500  1.0
  O  O28  1  0.809  0.000  0.821  1.0
  O  O29  1  0.809  0.000  0.179  1.0
  O  O30  1  0.702  0.500  0.694  1.0
  O  O31  1  0.702  0.500  0.306  1.0
  O  O32  1  0.680  0.308  0.000  1.0
  O  O33  1  0.680  0.692  0.000  1.0
  O  O34  1  0.500  0.180  0.688  1.0
  O  O35  1  0.500  0.180  0.312  1.0
[/CIF]
.