The material structure described by Gd3TaO7 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(4) atoms. In the second Gd site, Gd(2) is bonded to one O(3), two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form distorted GdO7 pentagonal bipyramids that share corners with two equivalent Ta(1)O6 octahedra, corners with three equivalent Gd(2)O7 pentagonal bipyramids, edges with two equivalent Ta(1)O6 octahedra, and edges with two equivalent Gd(2)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 35-44°. Ta(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form TaO6 octahedra that share corners with two equivalent Ta(1)O6 octahedra, corners with four equivalent Gd(2)O7 pentagonal bipyramids, and edges with four equivalent Gd(2)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 34°. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Gd(1), two equivalent Gd(2), and one Ta(1) atom to form distorted OGd3Ta tetrahedra that share corners with four equivalent O(4)Gd4 tetrahedra, edges with two equivalent O(1)Gd3Ta tetrahedra, and edges with two equivalent O(4)Gd4 tetrahedra. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Gd(2) and one Ta(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to two equivalent Gd(2) and two equivalent Ta(1) atoms. In the fourth O site, O(4) is bonded to two equivalent Gd(1) and two equivalent Gd(2) atoms to form OGd4 tetrahedra that share corners with four equivalent O(1)Gd3Ta tetrahedra, corners with six equivalent O(4)Gd4 tetrahedra,  an edgeedge with one O(4)Gd4 tetrahedra, and edges with two equivalent O(1)Gd3Ta tetrahedra. is represented by the CIF card [CIF]
data_Gd3TaO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.572
_cell_length_b   7.613
_cell_length_c   10.757
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   620.128
_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
  Gd  Gd0  1  0.011  0.791  0.250  1.0
  Gd  Gd1  1  0.252  0.966  0.520  1.0
  Gd  Gd2  1  0.252  0.966  0.980  1.0
  Gd  Gd3  1  0.248  0.466  0.020  1.0
  Gd  Gd4  1  0.248  0.466  0.480  1.0
  Gd  Gd5  1  0.489  0.291  0.750  1.0
  Gd  Gd6  1  0.511  0.709  0.250  1.0
  Gd  Gd7  1  0.752  0.534  0.520  1.0
  Gd  Gd8  1  0.752  0.534  0.980  1.0
  Gd  Gd9  1  0.748  0.034  0.020  1.0
  Gd  Gd10  1  0.748  0.034  0.480  1.0
  Gd  Gd11  1  0.989  0.209  0.750  1.0
  Ta  Ta12  1  0.999  0.749  0.750  1.0
  Ta  Ta13  1  0.501  0.249  0.250  1.0
  Ta  Ta14  1  0.499  0.751  0.750  1.0
  Ta  Ta15  1  0.001  0.251  0.250  1.0
  O  O16  1  0.034  0.049  0.126  1.0
  O  O17  1  0.034  0.049  0.374  1.0
  O  O18  1  0.038  0.583  0.614  1.0
  O  O19  1  0.038  0.583  0.886  1.0
  O  O20  1  0.248  0.326  0.250  1.0
  O  O21  1  0.255  0.732  0.117  1.0
  O  O22  1  0.255  0.732  0.383  1.0
  O  O23  1  0.245  0.232  0.617  1.0
  O  O24  1  0.245  0.232  0.883  1.0
  O  O25  1  0.252  0.826  0.750  1.0
  O  O26  1  0.462  0.083  0.114  1.0
  O  O27  1  0.462  0.083  0.386  1.0
  O  O28  1  0.466  0.549  0.626  1.0
  O  O29  1  0.466  0.549  0.874  1.0
  O  O30  1  0.534  0.451  0.126  1.0
  O  O31  1  0.534  0.451  0.374  1.0
  O  O32  1  0.538  0.917  0.614  1.0
  O  O33  1  0.538  0.917  0.886  1.0
  O  O34  1  0.748  0.174  0.250  1.0
  O  O35  1  0.755  0.768  0.117  1.0
  O  O36  1  0.755  0.768  0.383  1.0
  O  O37  1  0.745  0.268  0.617  1.0
  O  O38  1  0.745  0.268  0.883  1.0
  O  O39  1  0.752  0.674  0.750  1.0
  O  O40  1  0.962  0.417  0.114  1.0
  O  O41  1  0.962  0.417  0.386  1.0
  O  O42  1  0.966  0.951  0.626  1.0
  O  O43  1  0.966  0.951  0.874  1.0
[/CIF]
.
The material structure described by Gd3TaO7 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(4) atoms. In the second Gd site, Gd(2) is bonded to one O(3), two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form distorted GdO7 pentagonal bipyramids that share corners with two equivalent Ta(1)O6 octahedra, corners with three equivalent Gd(2)O7 pentagonal bipyramids, edges with two equivalent Ta(1)O6 octahedra, and edges with two equivalent Gd(2)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 35-44°. Ta(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form TaO6 octahedra that share corners with two equivalent Ta(1)O6 octahedra, corners with four equivalent Gd(2)O7 pentagonal bipyramids, and edges with four equivalent Gd(2)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 34°. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Gd(1), two equivalent Gd(2), and one Ta(1) atom to form distorted OGd3Ta tetrahedra that share corners with four equivalent O(4)Gd4 tetrahedra, edges with two equivalent O(1)Gd3Ta tetrahedra, and edges with two equivalent O(4)Gd4 tetrahedra. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Gd(2) and one Ta(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to two equivalent Gd(2) and two equivalent Ta(1) atoms. In the fourth O site, O(4) is bonded to two equivalent Gd(1) and two equivalent Gd(2) atoms to form OGd4 tetrahedra that share corners with four equivalent O(1)Gd3Ta tetrahedra, corners with six equivalent O(4)Gd4 tetrahedra,  an edgeedge with one O(4)Gd4 tetrahedra, and edges with two equivalent O(1)Gd3Ta tetrahedra. is represented by the CIF card [CIF]
data_Gd3TaO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.572
_cell_length_b   7.613
_cell_length_c   10.757
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   620.128
_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
  Gd  Gd0  1  0.011  0.791  0.250  1.0
  Gd  Gd1  1  0.252  0.966  0.520  1.0
  Gd  Gd2  1  0.252  0.966  0.980  1.0
  Gd  Gd3  1  0.248  0.466  0.020  1.0
  Gd  Gd4  1  0.248  0.466  0.480  1.0
  Gd  Gd5  1  0.489  0.291  0.750  1.0
  Gd  Gd6  1  0.511  0.709  0.250  1.0
  Gd  Gd7  1  0.752  0.534  0.520  1.0
  Gd  Gd8  1  0.752  0.534  0.980  1.0
  Gd  Gd9  1  0.748  0.034  0.020  1.0
  Gd  Gd10  1  0.748  0.034  0.480  1.0
  Gd  Gd11  1  0.989  0.209  0.750  1.0
  Ta  Ta12  1  0.999  0.749  0.750  1.0
  Ta  Ta13  1  0.501  0.249  0.250  1.0
  Ta  Ta14  1  0.499  0.751  0.750  1.0
  Ta  Ta15  1  0.001  0.251  0.250  1.0
  O  O16  1  0.034  0.049  0.126  1.0
  O  O17  1  0.034  0.049  0.374  1.0
  O  O18  1  0.038  0.583  0.614  1.0
  O  O19  1  0.038  0.583  0.886  1.0
  O  O20  1  0.248  0.326  0.250  1.0
  O  O21  1  0.255  0.732  0.117  1.0
  O  O22  1  0.255  0.732  0.383  1.0
  O  O23  1  0.245  0.232  0.617  1.0
  O  O24  1  0.245  0.232  0.883  1.0
  O  O25  1  0.252  0.826  0.750  1.0
  O  O26  1  0.462  0.083  0.114  1.0
  O  O27  1  0.462  0.083  0.386  1.0
  O  O28  1  0.466  0.549  0.626  1.0
  O  O29  1  0.466  0.549  0.874  1.0
  O  O30  1  0.534  0.451  0.126  1.0
  O  O31  1  0.534  0.451  0.374  1.0
  O  O32  1  0.538  0.917  0.614  1.0
  O  O33  1  0.538  0.917  0.886  1.0
  O  O34  1  0.748  0.174  0.250  1.0
  O  O35  1  0.755  0.768  0.117  1.0
  O  O36  1  0.755  0.768  0.383  1.0
  O  O37  1  0.745  0.268  0.617  1.0
  O  O38  1  0.745  0.268  0.883  1.0
  O  O39  1  0.752  0.674  0.750  1.0
  O  O40  1  0.962  0.417  0.114  1.0
  O  O41  1  0.962  0.417  0.386  1.0
  O  O42  1  0.966  0.951  0.626  1.0
  O  O43  1  0.966  0.951  0.874  1.0
[/CIF]
.