The structure described by Gd(BiO2)4 crystallizes in the monoclinic Cm space group. Gd(1) is bonded to one O(2), one O(4), one O(5), two equivalent O(1), and two equivalent O(8) atoms to form distorted GdO7 pentagonal bipyramids that share  a cornercorner with one Bi(1)O6 octahedra, edges with two equivalent Bi(1)O6 octahedra, edges with two equivalent Gd(1)O7 pentagonal bipyramids, and edges with two equivalent Bi(2)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 41°. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form BiO6 octahedra that share  a cornercorner with one Gd(1)O7 pentagonal bipyramid,  a cornercorner with one Bi(2)O7 pentagonal bipyramid, edges with two equivalent Bi(1)O6 octahedra, edges with two equivalent Gd(1)O7 pentagonal bipyramids, and edges with two equivalent Bi(2)O7 pentagonal bipyramids. In the second Bi site, Bi(2) is bonded to one O(1), one O(3), one O(6), two equivalent O(4), and two equivalent O(7) atoms to form distorted BiO7 pentagonal bipyramids that share  a cornercorner with one Bi(1)O6 octahedra, edges with two equivalent Bi(1)O6 octahedra, edges with two equivalent Gd(1)O7 pentagonal bipyramids, and edges with two equivalent Bi(2)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 48°. In the third Bi site, Bi(3) is bonded in a 6-coordinate geometry to one O(3), one O(6), one O(7), one O(8), and two equivalent O(5) atoms. In the fourth Bi site, Bi(4) is bonded in a 6-coordinate geometry to one O(2), one O(5), one O(7), one O(8), and two equivalent O(6) atoms. There are eight inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Gd(1), one Bi(1), and one Bi(2) atom to form OGd2Bi2 tetrahedra that share  a cornercorner with one O(6)Bi4 tetrahedra,  a cornercorner with one O(4)GdBi3 tetrahedra, corners with two equivalent O(7)Bi4 tetrahedra, corners with two equivalent O(1)Gd2Bi2 tetrahedra, corners with two equivalent O(8)Gd2Bi2 tetrahedra, corners with two equivalent O(5)GdBi3 tetrahedra, corners with three equivalent O(3)Bi4 tetrahedra,  an edgeedge with one O(8)Gd2Bi2 tetrahedra, edges with two equivalent O(2)GdBi3 tetrahedra, and edges with two equivalent O(4)GdBi3 tetrahedra. In the second O site, O(2) is bonded to one Gd(1), one Bi(4), and two equivalent Bi(1) atoms to form OGdBi3 tetrahedra that share  a cornercorner with one O(7)Bi4 tetrahedra, corners with two equivalent O(3)Bi4 tetrahedra, corners with two equivalent O(6)Bi4 tetrahedra, corners with two equivalent O(2)GdBi3 tetrahedra, corners with three equivalent O(8)Gd2Bi2 tetrahedra, corners with three equivalent O(4)GdBi3 tetrahedra,  an edgeedge with one O(3)Bi4 tetrahedra,  an edgeedge with one O(5)GdBi3 tetrahedra, and edges with two equivalent O(1)Gd2Bi2 tetrahedra. In the third O site, O(3) is bonded to one Bi(2), one Bi(3), and two equivalent Bi(1) atoms to form distorted OBi4 tetrahedra that share  a cornercorner with one O(8)Gd2Bi2 tetrahedra, corners with two equivalent O(3)Bi4 tetrahedra, corners with two equivalent O(2)GdBi3 tetrahedra, corners with two equivalent O(5)GdBi3 tetrahedra, corners with three equivalent O(7)Bi4 tetrahedra, corners with three equivalent O(1)Gd2Bi2 tetrahedra,  an edgeedge with one O(6)Bi4 tetrahedra,  an edgeedge with one O(2)GdBi3 tetrahedra, and edges with two equivalent O(4)GdBi3 tetrahedra. In the fourth O site, O(4) is bonded to one Gd(1), one Bi(1), and two equivalent Bi(2) atoms to form distorted OGdBi3 tetrahedra that share  a cornercorner with one O(1)Gd2Bi2 tetrahedra,  a cornercorner with one O(5)GdBi3 tetrahedra, corners with two equivalent O(6)Bi4 tetrahedra, corners with two equivalent O(7)Bi4 tetrahedra, corners with two equivalent O(8)Gd2Bi2 tetrahedra, corners with two equivalent O(4)GdBi3 tetrahedra, corners with three equivalent O(2)GdBi3 tetrahedra,  an edgeedge with one O(7)Bi4 tetrahedra, edges with two equivalent O(3)Bi4 tetrahedra, and edges with two equivalent O(1)Gd2Bi2 tetrahedra. In the fifth O site, O(5) is bonded to one Gd(1), one Bi(4), and two equivalent Bi(3) atoms to form OGdBi3 tetrahedra that share  a cornercorner with one O(8)Gd2Bi2 tetrahedra,  a cornercorner with one O(4)GdBi3 tetrahedra, corners with two equivalent O(3)Bi4 tetrahedra, corners with two equivalent O(1)Gd2Bi2 tetrahedra, corners with two equivalent O(5)GdBi3 tetrahedra, corners with three equivalent O(7)Bi4 tetrahedra,  an edgeedge with one O(2)GdBi3 tetrahedra, edges with two equivalent O(6)Bi4 tetrahedra, and edges with two equivalent O(8)Gd2Bi2 tetrahedra. In the sixth O site, O(6) is bonded to one Bi(2), one Bi(3), and two equivalent Bi(4) atoms to form OBi4 tetrahedra that share  a cornercorner with one O(7)Bi4 tetrahedra,  a cornercorner with one O(1)Gd2Bi2 tetrahedra, corners with two equivalent O(6)Bi4 tetrahedra, corners with two equivalent O(2)GdBi3 tetrahedra, corners with two equivalent O(4)GdBi3 tetrahedra, corners with three equivalent O(8)Gd2Bi2 tetrahedra,  an edgeedge with one O(3)Bi4 tetrahedra, edges with two equivalent O(7)Bi4 tetrahedra, and edges with two equivalent O(5)GdBi3 tetrahedra. In the seventh O site, O(7) is bonded to one Bi(3), one Bi(4), and two equivalent Bi(2) atoms to form OBi4 tetrahedra that share  a cornercorner with one O(6)Bi4 tetrahedra,  a cornercorner with one O(2)GdBi3 tetrahedra, corners with two equivalent O(7)Bi4 tetrahedra, corners with two equivalent O(1)Gd2Bi2 tetrahedra, corners with two equivalent O(4)GdBi3 tetrahedra, corners with three equivalent O(3)Bi4 tetrahedra, corners with three equivalent O(5)GdBi3 tetrahedra,  an edgeedge with one O(8)Gd2Bi2 tetrahedra,  an edgeedge with one O(4)GdBi3 tetrahedra, and edges with two equivalent O(6)Bi4 tetrahedra. In the eighth O site, O(8) is bonded to two equivalent Gd(1), one Bi(3), and one Bi(4) atom to form OGd2Bi2 tetrahedra that share  a cornercorner with one O(3)Bi4 tetrahedra,  a cornercorner with one O(5)GdBi3 tetrahedra, corners with two equivalent O(1)Gd2Bi2 tetrahedra, corners with two equivalent O(8)Gd2Bi2 tetrahedra, corners with two equivalent O(4)GdBi3 tetrahedra, corners with three equivalent O(6)Bi4 tetrahedra, corners with three equivalent O(2)GdBi3 tetrahedra,  an edgeedge with one O(7)Bi4 tetrahedra,  an edgeedge with one O(1)Gd2Bi2 tetrahedra, and edges with two equivalent O(5)GdBi3 tetrahedra. is represented by the CIF card [CIF]
data_Gd(BiO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.000
_cell_length_b   7.000
_cell_length_c   9.877
_cell_angle_alpha   60.606
_cell_angle_beta   60.606
_cell_angle_gamma   31.164
_symmetry_Int_Tables_number   1
_cell_volume   215.474
_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  0.021  0.021  0.987  1.0
  Bi  Bi1  1  0.796  0.796  0.799  1.0
  Bi  Bi2  1  0.573  0.573  0.619  1.0
  Bi  Bi3  1  0.407  0.407  0.361  1.0
  Bi  Bi4  1  0.191  0.191  0.232  1.0
  O  O5  1  0.624  0.624  0.814  1.0
  O  O6  1  0.214  0.214  0.959  1.0
  O  O7  1  0.373  0.373  0.640  1.0
  O  O8  1  0.960  0.960  0.803  1.0
  O  O9  1  0.000  0.000  0.244  1.0
  O  O10  1  0.597  0.597  0.348  1.0
  O  O11  1  0.193  0.193  0.473  1.0
  O  O12  1  0.406  0.406  0.123  1.0
[/CIF]
.
The structure described by Gd(BiO2)4 crystallizes in the monoclinic Cm space group. Gd(1) is bonded to one O(2), one O(4), one O(5), two equivalent O(1), and two equivalent O(8) atoms to form distorted GdO7 pentagonal bipyramids that share  a cornercorner with one Bi(1)O6 octahedra, edges with two equivalent Bi(1)O6 octahedra, edges with two equivalent Gd(1)O7 pentagonal bipyramids, and edges with two equivalent Bi(2)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 41°. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form BiO6 octahedra that share  a cornercorner with one Gd(1)O7 pentagonal bipyramid,  a cornercorner with one Bi(2)O7 pentagonal bipyramid, edges with two equivalent Bi(1)O6 octahedra, edges with two equivalent Gd(1)O7 pentagonal bipyramids, and edges with two equivalent Bi(2)O7 pentagonal bipyramids. In the second Bi site, Bi(2) is bonded to one O(1), one O(3), one O(6), two equivalent O(4), and two equivalent O(7) atoms to form distorted BiO7 pentagonal bipyramids that share  a cornercorner with one Bi(1)O6 octahedra, edges with two equivalent Bi(1)O6 octahedra, edges with two equivalent Gd(1)O7 pentagonal bipyramids, and edges with two equivalent Bi(2)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 48°. In the third Bi site, Bi(3) is bonded in a 6-coordinate geometry to one O(3), one O(6), one O(7), one O(8), and two equivalent O(5) atoms. In the fourth Bi site, Bi(4) is bonded in a 6-coordinate geometry to one O(2), one O(5), one O(7), one O(8), and two equivalent O(6) atoms. There are eight inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Gd(1), one Bi(1), and one Bi(2) atom to form OGd2Bi2 tetrahedra that share  a cornercorner with one O(6)Bi4 tetrahedra,  a cornercorner with one O(4)GdBi3 tetrahedra, corners with two equivalent O(7)Bi4 tetrahedra, corners with two equivalent O(1)Gd2Bi2 tetrahedra, corners with two equivalent O(8)Gd2Bi2 tetrahedra, corners with two equivalent O(5)GdBi3 tetrahedra, corners with three equivalent O(3)Bi4 tetrahedra,  an edgeedge with one O(8)Gd2Bi2 tetrahedra, edges with two equivalent O(2)GdBi3 tetrahedra, and edges with two equivalent O(4)GdBi3 tetrahedra. In the second O site, O(2) is bonded to one Gd(1), one Bi(4), and two equivalent Bi(1) atoms to form OGdBi3 tetrahedra that share  a cornercorner with one O(7)Bi4 tetrahedra, corners with two equivalent O(3)Bi4 tetrahedra, corners with two equivalent O(6)Bi4 tetrahedra, corners with two equivalent O(2)GdBi3 tetrahedra, corners with three equivalent O(8)Gd2Bi2 tetrahedra, corners with three equivalent O(4)GdBi3 tetrahedra,  an edgeedge with one O(3)Bi4 tetrahedra,  an edgeedge with one O(5)GdBi3 tetrahedra, and edges with two equivalent O(1)Gd2Bi2 tetrahedra. In the third O site, O(3) is bonded to one Bi(2), one Bi(3), and two equivalent Bi(1) atoms to form distorted OBi4 tetrahedra that share  a cornercorner with one O(8)Gd2Bi2 tetrahedra, corners with two equivalent O(3)Bi4 tetrahedra, corners with two equivalent O(2)GdBi3 tetrahedra, corners with two equivalent O(5)GdBi3 tetrahedra, corners with three equivalent O(7)Bi4 tetrahedra, corners with three equivalent O(1)Gd2Bi2 tetrahedra,  an edgeedge with one O(6)Bi4 tetrahedra,  an edgeedge with one O(2)GdBi3 tetrahedra, and edges with two equivalent O(4)GdBi3 tetrahedra. In the fourth O site, O(4) is bonded to one Gd(1), one Bi(1), and two equivalent Bi(2) atoms to form distorted OGdBi3 tetrahedra that share  a cornercorner with one O(1)Gd2Bi2 tetrahedra,  a cornercorner with one O(5)GdBi3 tetrahedra, corners with two equivalent O(6)Bi4 tetrahedra, corners with two equivalent O(7)Bi4 tetrahedra, corners with two equivalent O(8)Gd2Bi2 tetrahedra, corners with two equivalent O(4)GdBi3 tetrahedra, corners with three equivalent O(2)GdBi3 tetrahedra,  an edgeedge with one O(7)Bi4 tetrahedra, edges with two equivalent O(3)Bi4 tetrahedra, and edges with two equivalent O(1)Gd2Bi2 tetrahedra. In the fifth O site, O(5) is bonded to one Gd(1), one Bi(4), and two equivalent Bi(3) atoms to form OGdBi3 tetrahedra that share  a cornercorner with one O(8)Gd2Bi2 tetrahedra,  a cornercorner with one O(4)GdBi3 tetrahedra, corners with two equivalent O(3)Bi4 tetrahedra, corners with two equivalent O(1)Gd2Bi2 tetrahedra, corners with two equivalent O(5)GdBi3 tetrahedra, corners with three equivalent O(7)Bi4 tetrahedra,  an edgeedge with one O(2)GdBi3 tetrahedra, edges with two equivalent O(6)Bi4 tetrahedra, and edges with two equivalent O(8)Gd2Bi2 tetrahedra. In the sixth O site, O(6) is bonded to one Bi(2), one Bi(3), and two equivalent Bi(4) atoms to form OBi4 tetrahedra that share  a cornercorner with one O(7)Bi4 tetrahedra,  a cornercorner with one O(1)Gd2Bi2 tetrahedra, corners with two equivalent O(6)Bi4 tetrahedra, corners with two equivalent O(2)GdBi3 tetrahedra, corners with two equivalent O(4)GdBi3 tetrahedra, corners with three equivalent O(8)Gd2Bi2 tetrahedra,  an edgeedge with one O(3)Bi4 tetrahedra, edges with two equivalent O(7)Bi4 tetrahedra, and edges with two equivalent O(5)GdBi3 tetrahedra. In the seventh O site, O(7) is bonded to one Bi(3), one Bi(4), and two equivalent Bi(2) atoms to form OBi4 tetrahedra that share  a cornercorner with one O(6)Bi4 tetrahedra,  a cornercorner with one O(2)GdBi3 tetrahedra, corners with two equivalent O(7)Bi4 tetrahedra, corners with two equivalent O(1)Gd2Bi2 tetrahedra, corners with two equivalent O(4)GdBi3 tetrahedra, corners with three equivalent O(3)Bi4 tetrahedra, corners with three equivalent O(5)GdBi3 tetrahedra,  an edgeedge with one O(8)Gd2Bi2 tetrahedra,  an edgeedge with one O(4)GdBi3 tetrahedra, and edges with two equivalent O(6)Bi4 tetrahedra. In the eighth O site, O(8) is bonded to two equivalent Gd(1), one Bi(3), and one Bi(4) atom to form OGd2Bi2 tetrahedra that share  a cornercorner with one O(3)Bi4 tetrahedra,  a cornercorner with one O(5)GdBi3 tetrahedra, corners with two equivalent O(1)Gd2Bi2 tetrahedra, corners with two equivalent O(8)Gd2Bi2 tetrahedra, corners with two equivalent O(4)GdBi3 tetrahedra, corners with three equivalent O(6)Bi4 tetrahedra, corners with three equivalent O(2)GdBi3 tetrahedra,  an edgeedge with one O(7)Bi4 tetrahedra,  an edgeedge with one O(1)Gd2Bi2 tetrahedra, and edges with two equivalent O(5)GdBi3 tetrahedra. is represented by the CIF card [CIF]
data_Gd(BiO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.000
_cell_length_b   7.000
_cell_length_c   9.877
_cell_angle_alpha   60.606
_cell_angle_beta   60.606
_cell_angle_gamma   31.164
_symmetry_Int_Tables_number   1
_cell_volume   215.474
_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  0.021  0.021  0.987  1.0
  Bi  Bi1  1  0.796  0.796  0.799  1.0
  Bi  Bi2  1  0.573  0.573  0.619  1.0
  Bi  Bi3  1  0.407  0.407  0.361  1.0
  Bi  Bi4  1  0.191  0.191  0.232  1.0
  O  O5  1  0.624  0.624  0.814  1.0
  O  O6  1  0.214  0.214  0.959  1.0
  O  O7  1  0.373  0.373  0.640  1.0
  O  O8  1  0.960  0.960  0.803  1.0
  O  O9  1  0.000  0.000  0.244  1.0
  O  O10  1  0.597  0.597  0.348  1.0
  O  O11  1  0.193  0.193  0.473  1.0
  O  O12  1  0.406  0.406  0.123  1.0
[/CIF]
.