The crystal structure described by GdTa4O12 crystallizes in the orthorhombic Amm2 space group. Gd(1) is bonded in a 12-coordinate geometry to two equivalent O(1), two equivalent O(5), four equivalent O(2), and four equivalent O(3) atoms. Ta(1) is bonded to one O(1), one O(3), one O(4), one O(5), and two equivalent O(2) atoms to form corner-sharing TaO6 octahedra. The corner-sharing octahedral tilt angles range from 7-16°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Gd(1) and two equivalent Ta(1) atoms. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Gd(1) and two equivalent Ta(1) atoms. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Gd(1) and two equivalent Ta(1) atoms. In the fourth O site, O(4) is bonded in a linear geometry to two equivalent Ta(1) atoms. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Gd(1) and two equivalent Ta(1) atoms. is represented by the CIF file [CIF]
data_GdTa4O12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.588
_cell_length_b   5.588
_cell_length_c   7.943
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.051
_symmetry_Int_Tables_number   1
_cell_volume   248.064
_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
  Gd  Gd0  1  0.713  0.287  0.000  1.0
  Ta  Ta1  1  0.748  0.758  0.257  1.0
  Ta  Ta2  1  0.242  0.252  0.257  1.0
  Ta  Ta3  1  0.748  0.758  0.743  1.0
  Ta  Ta4  1  0.242  0.252  0.743  1.0
  O  O5  1  0.998  0.002  0.236  1.0
  O  O6  1  0.998  0.002  0.764  1.0
  O  O7  1  0.514  0.011  0.228  1.0
  O  O8  1  0.989  0.486  0.772  1.0
  O  O9  1  0.514  0.011  0.772  1.0
  O  O10  1  0.989  0.486  0.228  1.0
  O  O11  1  0.752  0.730  0.000  1.0
  O  O12  1  0.270  0.248  0.000  1.0
  O  O13  1  0.740  0.739  0.500  1.0
  O  O14  1  0.261  0.260  0.500  1.0
  O  O15  1  0.513  0.487  0.226  1.0
  O  O16  1  0.513  0.487  0.774  1.0
[/CIF]
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The crystal structure described by GdTa4O12 crystallizes in the orthorhombic Amm2 space group. Gd(1) is bonded in a 12-coordinate geometry to two equivalent O(1), two equivalent O(5), four equivalent O(2), and four equivalent O(3) atoms. Ta(1) is bonded to one O(1), one O(3), one O(4), one O(5), and two equivalent O(2) atoms to form corner-sharing TaO6 octahedra. The corner-sharing octahedral tilt angles range from 7-16°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Gd(1) and two equivalent Ta(1) atoms. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Gd(1) and two equivalent Ta(1) atoms. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Gd(1) and two equivalent Ta(1) atoms. In the fourth O site, O(4) is bonded in a linear geometry to two equivalent Ta(1) atoms. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Gd(1) and two equivalent Ta(1) atoms. is represented by the CIF file [CIF]
data_GdTa4O12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.588
_cell_length_b   5.588
_cell_length_c   7.943
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.051
_symmetry_Int_Tables_number   1
_cell_volume   248.064
_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
  Gd  Gd0  1  0.713  0.287  0.000  1.0
  Ta  Ta1  1  0.748  0.758  0.257  1.0
  Ta  Ta2  1  0.242  0.252  0.257  1.0
  Ta  Ta3  1  0.748  0.758  0.743  1.0
  Ta  Ta4  1  0.242  0.252  0.743  1.0
  O  O5  1  0.998  0.002  0.236  1.0
  O  O6  1  0.998  0.002  0.764  1.0
  O  O7  1  0.514  0.011  0.228  1.0
  O  O8  1  0.989  0.486  0.772  1.0
  O  O9  1  0.514  0.011  0.772  1.0
  O  O10  1  0.989  0.486  0.228  1.0
  O  O11  1  0.752  0.730  0.000  1.0
  O  O12  1  0.270  0.248  0.000  1.0
  O  O13  1  0.740  0.739  0.500  1.0
  O  O14  1  0.261  0.260  0.500  1.0
  O  O15  1  0.513  0.487  0.226  1.0
  O  O16  1  0.513  0.487  0.774  1.0
[/CIF]
.