The crystal structure described by Eu3SbO7 crystallizes in the orthorhombic C222_1 space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to one O(1), one O(2), one O(4), two equivalent O(3), and two equivalent O(5) atoms to form distorted EuO7 pentagonal bipyramids that share corners with two equivalent Sb(1)O6 octahedra,  a cornercorner with one Eu(1)O7 pentagonal bipyramid, edges with two equivalent Sb(1)O6 octahedra, and edges with three equivalent Eu(1)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 46-48°. In the second Eu site, Eu(2) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. Sb(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms to form SbO6 octahedra that share corners with two equivalent Sb(1)O6 octahedra, corners with four equivalent Eu(1)O7 pentagonal bipyramids, and edges with four equivalent Eu(1)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 39°. There are five inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Eu(1) and two equivalent Eu(2) atoms to form OEu4 tetrahedra that share corners with two equivalent O(1)Eu4 tetrahedra, corners with four equivalent O(3)Eu3Sb tetrahedra, corners with four equivalent O(4)Eu4 tetrahedra,  an edgeedge with one O(4)Eu4 tetrahedra, edges with two equivalent O(3)Eu3Sb tetrahedra, and  an edgeedge with one O(2)Eu2Sb2 trigonal pyramid. In the second O site, O(2) is bonded to two equivalent Eu(1) and two equivalent Sb(1) atoms to form distorted OEu2Sb2 trigonal pyramids that share corners with two equivalent O(4)Eu4 tetrahedra, corners with four equivalent O(3)Eu3Sb tetrahedra, corners with two equivalent O(2)Eu2Sb2 trigonal pyramids,  an edgeedge with one O(1)Eu4 tetrahedra, and edges with two equivalent O(3)Eu3Sb tetrahedra. In the third O site, O(3) is bonded to one Eu(2), two equivalent Eu(1), and one Sb(1) atom to form distorted OEu3Sb tetrahedra that share corners with two equivalent O(3)Eu3Sb tetrahedra, corners with two equivalent O(1)Eu4 tetrahedra, corners with two equivalent O(4)Eu4 tetrahedra, corners with two equivalent O(2)Eu2Sb2 trigonal pyramids,  an edgeedge with one O(3)Eu3Sb tetrahedra,  an edgeedge with one O(1)Eu4 tetrahedra,  an edgeedge with one O(4)Eu4 tetrahedra, and  an edgeedge with one O(2)Eu2Sb2 trigonal pyramid. In the fourth O site, O(4) is bonded to two equivalent Eu(1) and two equivalent Eu(2) atoms to form OEu4 tetrahedra that share corners with two equivalent O(4)Eu4 tetrahedra, corners with four equivalent O(3)Eu3Sb tetrahedra, corners with four equivalent O(1)Eu4 tetrahedra, corners with two equivalent O(2)Eu2Sb2 trigonal pyramids,  an edgeedge with one O(1)Eu4 tetrahedra, and edges with two equivalent O(3)Eu3Sb tetrahedra. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Eu(2), two equivalent Eu(1), and one Sb(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Eu3SbO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.617
_cell_length_b   6.617
_cell_length_c   7.713
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   110.141
_symmetry_Int_Tables_number   1
_cell_volume   317.055
_cell_formula_units_Z   2
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
  Eu  Eu0  1  0.003  0.472  0.749  1.0
  Eu  Eu1  1  0.997  0.528  0.249  1.0
  Eu  Eu2  1  0.528  0.997  0.751  1.0
  Eu  Eu3  1  0.472  0.003  0.251  1.0
  Eu  Eu4  1  0.503  0.503  0.500  1.0
  Eu  Eu5  1  0.497  0.497  0.000  1.0
  Sb  Sb6  1  0.998  0.998  0.500  1.0
  Sb  Sb7  1  0.002  0.002  0.000  1.0
  O  O8  1  0.638  0.362  0.750  1.0
  O  O9  1  0.362  0.638  0.250  1.0
  O  O10  1  0.937  0.063  0.750  1.0
  O  O11  1  0.063  0.937  0.250  1.0
  O  O12  1  0.923  0.679  0.527  1.0
  O  O13  1  0.077  0.321  0.027  1.0
  O  O14  1  0.321  0.077  0.973  1.0
  O  O15  1  0.679  0.923  0.473  1.0
  O  O16  1  0.372  0.628  0.750  1.0
  O  O17  1  0.628  0.372  0.250  1.0
  O  O18  1  0.935  0.686  0.969  1.0
  O  O19  1  0.065  0.314  0.469  1.0
  O  O20  1  0.314  0.065  0.531  1.0
  O  O21  1  0.686  0.935  0.031  1.0
[/CIF]
.
The crystal structure described by Eu3SbO7 crystallizes in the orthorhombic C222_1 space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to one O(1), one O(2), one O(4), two equivalent O(3), and two equivalent O(5) atoms to form distorted EuO7 pentagonal bipyramids that share corners with two equivalent Sb(1)O6 octahedra,  a cornercorner with one Eu(1)O7 pentagonal bipyramid, edges with two equivalent Sb(1)O6 octahedra, and edges with three equivalent Eu(1)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 46-48°. In the second Eu site, Eu(2) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. Sb(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms to form SbO6 octahedra that share corners with two equivalent Sb(1)O6 octahedra, corners with four equivalent Eu(1)O7 pentagonal bipyramids, and edges with four equivalent Eu(1)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 39°. There are five inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Eu(1) and two equivalent Eu(2) atoms to form OEu4 tetrahedra that share corners with two equivalent O(1)Eu4 tetrahedra, corners with four equivalent O(3)Eu3Sb tetrahedra, corners with four equivalent O(4)Eu4 tetrahedra,  an edgeedge with one O(4)Eu4 tetrahedra, edges with two equivalent O(3)Eu3Sb tetrahedra, and  an edgeedge with one O(2)Eu2Sb2 trigonal pyramid. In the second O site, O(2) is bonded to two equivalent Eu(1) and two equivalent Sb(1) atoms to form distorted OEu2Sb2 trigonal pyramids that share corners with two equivalent O(4)Eu4 tetrahedra, corners with four equivalent O(3)Eu3Sb tetrahedra, corners with two equivalent O(2)Eu2Sb2 trigonal pyramids,  an edgeedge with one O(1)Eu4 tetrahedra, and edges with two equivalent O(3)Eu3Sb tetrahedra. In the third O site, O(3) is bonded to one Eu(2), two equivalent Eu(1), and one Sb(1) atom to form distorted OEu3Sb tetrahedra that share corners with two equivalent O(3)Eu3Sb tetrahedra, corners with two equivalent O(1)Eu4 tetrahedra, corners with two equivalent O(4)Eu4 tetrahedra, corners with two equivalent O(2)Eu2Sb2 trigonal pyramids,  an edgeedge with one O(3)Eu3Sb tetrahedra,  an edgeedge with one O(1)Eu4 tetrahedra,  an edgeedge with one O(4)Eu4 tetrahedra, and  an edgeedge with one O(2)Eu2Sb2 trigonal pyramid. In the fourth O site, O(4) is bonded to two equivalent Eu(1) and two equivalent Eu(2) atoms to form OEu4 tetrahedra that share corners with two equivalent O(4)Eu4 tetrahedra, corners with four equivalent O(3)Eu3Sb tetrahedra, corners with four equivalent O(1)Eu4 tetrahedra, corners with two equivalent O(2)Eu2Sb2 trigonal pyramids,  an edgeedge with one O(1)Eu4 tetrahedra, and edges with two equivalent O(3)Eu3Sb tetrahedra. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Eu(2), two equivalent Eu(1), and one Sb(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Eu3SbO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.617
_cell_length_b   6.617
_cell_length_c   7.713
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   110.141
_symmetry_Int_Tables_number   1
_cell_volume   317.055
_cell_formula_units_Z   2
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
  Eu  Eu0  1  0.003  0.472  0.749  1.0
  Eu  Eu1  1  0.997  0.528  0.249  1.0
  Eu  Eu2  1  0.528  0.997  0.751  1.0
  Eu  Eu3  1  0.472  0.003  0.251  1.0
  Eu  Eu4  1  0.503  0.503  0.500  1.0
  Eu  Eu5  1  0.497  0.497  0.000  1.0
  Sb  Sb6  1  0.998  0.998  0.500  1.0
  Sb  Sb7  1  0.002  0.002  0.000  1.0
  O  O8  1  0.638  0.362  0.750  1.0
  O  O9  1  0.362  0.638  0.250  1.0
  O  O10  1  0.937  0.063  0.750  1.0
  O  O11  1  0.063  0.937  0.250  1.0
  O  O12  1  0.923  0.679  0.527  1.0
  O  O13  1  0.077  0.321  0.027  1.0
  O  O14  1  0.321  0.077  0.973  1.0
  O  O15  1  0.679  0.923  0.473  1.0
  O  O16  1  0.372  0.628  0.750  1.0
  O  O17  1  0.628  0.372  0.250  1.0
  O  O18  1  0.935  0.686  0.969  1.0
  O  O19  1  0.065  0.314  0.469  1.0
  O  O20  1  0.314  0.065  0.531  1.0
  O  O21  1  0.686  0.935  0.031  1.0
[/CIF]
.