The crystal structure described by Dy4(B2O5)3 crystallizes in the monoclinic C2/c space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 8-coordinate geometry to one O(1), one O(3), one O(4), one O(5), one O(6), one O(7), and two equivalent O(2) atoms. In the second Dy site, Dy(2) is bonded in a 8-coordinate geometry to one O(5), one O(8), two equivalent O(1), two equivalent O(4), and two equivalent O(7) atoms. There are three inequivalent B sites. In the first B site, B(1) is bonded to one O(5), one O(6), and two equivalent O(2) atoms to form a mixture of edge and corner-sharing BO4 tetrahedra. In the second B site, B(2) is bonded to one O(3), one O(4), one O(7), and one O(8) atom to form corner-sharing BO4 tetrahedra. In the third B site, B(3) is bonded to one O(1), one O(3), one O(5), and one O(6) atom to form corner-sharing BO4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(8) is bonded in a 4-coordinate geometry to two equivalent Dy(2) and two equivalent B(2) atoms. In the second O site, O(1) is bonded in a 4-coordinate geometry to one Dy(1), two equivalent Dy(2), and one B(3) atom. In the third O site, O(2) is bonded in a distorted L-shaped geometry to two equivalent Dy(1) and two equivalent B(1) atoms. In the fourth O site, O(3) is bonded in a 3-coordinate geometry to one Dy(1), one B(2), and one B(3) atom. In the fifth O site, O(4) is bonded in a 4-coordinate geometry to one Dy(1), two equivalent Dy(2), and one B(2) atom. In the sixth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Dy(1), one Dy(2), one B(1), and one B(3) atom. In the seventh O site, O(6) is bonded in a 3-coordinate geometry to one Dy(1), one B(1), and one B(3) atom. In the eighth O site, O(7) is bonded in a 4-coordinate geometry to one Dy(1), two equivalent Dy(2), and one B(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Dy4(B2O5)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.276
_cell_length_b   6.276
_cell_length_c   18.968
_cell_angle_alpha   83.921
_cell_angle_beta   83.921
_cell_angle_gamma   41.109
_symmetry_Int_Tables_number   1
_cell_volume   488.093
_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
  Dy  Dy0  1  0.066  0.668  0.099  1.0
  Dy  Dy1  1  0.332  0.934  0.401  1.0
  Dy  Dy2  1  0.934  0.332  0.901  1.0
  Dy  Dy3  1  0.668  0.066  0.599  1.0
  Dy  Dy4  1  0.348  0.927  0.197  1.0
  Dy  Dy5  1  0.073  0.652  0.303  1.0
  Dy  Dy6  1  0.652  0.073  0.803  1.0
  Dy  Dy7  1  0.927  0.348  0.697  1.0
  B  B8  1  0.361  0.978  0.026  1.0
  B  B9  1  0.022  0.639  0.474  1.0
  B  B10  1  0.639  0.022  0.974  1.0
  B  B11  1  0.978  0.361  0.526  1.0
  B  B12  1  0.794  0.341  0.306  1.0
  B  B13  1  0.659  0.206  0.194  1.0
  B  B14  1  0.206  0.659  0.694  1.0
  B  B15  1  0.341  0.794  0.806  1.0
  B  B16  1  0.196  0.609  0.912  1.0
  B  B17  1  0.391  0.804  0.588  1.0
  B  B18  1  0.804  0.391  0.088  1.0
  B  B19  1  0.609  0.196  0.412  1.0
  O  O20  1  0.078  0.560  0.861  1.0
  O  O21  1  0.922  0.440  0.139  1.0
  O  O22  1  0.088  0.496  0.549  1.0
  O  O23  1  0.504  0.912  0.951  1.0
  O  O24  1  0.912  0.504  0.451  1.0
  O  O25  1  0.496  0.088  0.049  1.0
  O  O26  1  0.163  0.810  0.622  1.0
  O  O27  1  0.190  0.837  0.878  1.0
  O  O28  1  0.560  0.078  0.361  1.0
  O  O29  1  0.810  0.163  0.122  1.0
  O  O30  1  0.664  0.466  0.803  1.0
  O  O31  1  0.534  0.336  0.697  1.0
  O  O32  1  0.336  0.534  0.197  1.0
  O  O33  1  0.466  0.664  0.303  1.0
  O  O34  1  0.711  0.460  0.570  1.0
  O  O35  1  0.540  0.289  0.930  1.0
  O  O36  1  0.289  0.540  0.430  1.0
  O  O37  1  0.460  0.711  0.070  1.0
  O  O38  1  0.753  0.991  0.478  1.0
  O  O39  1  0.009  0.247  0.022  1.0
  O  O40  1  0.247  0.009  0.522  1.0
  O  O41  1  0.991  0.753  0.978  1.0
  O  O42  1  0.953  0.686  0.703  1.0
  O  O43  1  0.314  0.047  0.797  1.0
  O  O44  1  0.047  0.314  0.297  1.0
  O  O45  1  0.686  0.953  0.203  1.0
  O  O46  1  0.865  0.135  0.250  1.0
  O  O47  1  0.135  0.865  0.750  1.0
  O  O48  1  0.837  0.190  0.378  1.0
  O  O49  1  0.440  0.922  0.639  1.0
[/CIF]
.
The crystal structure described by Dy4(B2O5)3 crystallizes in the monoclinic C2/c space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 8-coordinate geometry to one O(1), one O(3), one O(4), one O(5), one O(6), one O(7), and two equivalent O(2) atoms. In the second Dy site, Dy(2) is bonded in a 8-coordinate geometry to one O(5), one O(8), two equivalent O(1), two equivalent O(4), and two equivalent O(7) atoms. There are three inequivalent B sites. In the first B site, B(1) is bonded to one O(5), one O(6), and two equivalent O(2) atoms to form a mixture of edge and corner-sharing BO4 tetrahedra. In the second B site, B(2) is bonded to one O(3), one O(4), one O(7), and one O(8) atom to form corner-sharing BO4 tetrahedra. In the third B site, B(3) is bonded to one O(1), one O(3), one O(5), and one O(6) atom to form corner-sharing BO4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(8) is bonded in a 4-coordinate geometry to two equivalent Dy(2) and two equivalent B(2) atoms. In the second O site, O(1) is bonded in a 4-coordinate geometry to one Dy(1), two equivalent Dy(2), and one B(3) atom. In the third O site, O(2) is bonded in a distorted L-shaped geometry to two equivalent Dy(1) and two equivalent B(1) atoms. In the fourth O site, O(3) is bonded in a 3-coordinate geometry to one Dy(1), one B(2), and one B(3) atom. In the fifth O site, O(4) is bonded in a 4-coordinate geometry to one Dy(1), two equivalent Dy(2), and one B(2) atom. In the sixth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Dy(1), one Dy(2), one B(1), and one B(3) atom. In the seventh O site, O(6) is bonded in a 3-coordinate geometry to one Dy(1), one B(1), and one B(3) atom. In the eighth O site, O(7) is bonded in a 4-coordinate geometry to one Dy(1), two equivalent Dy(2), and one B(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Dy4(B2O5)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.276
_cell_length_b   6.276
_cell_length_c   18.968
_cell_angle_alpha   83.921
_cell_angle_beta   83.921
_cell_angle_gamma   41.109
_symmetry_Int_Tables_number   1
_cell_volume   488.093
_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
  Dy  Dy0  1  0.066  0.668  0.099  1.0
  Dy  Dy1  1  0.332  0.934  0.401  1.0
  Dy  Dy2  1  0.934  0.332  0.901  1.0
  Dy  Dy3  1  0.668  0.066  0.599  1.0
  Dy  Dy4  1  0.348  0.927  0.197  1.0
  Dy  Dy5  1  0.073  0.652  0.303  1.0
  Dy  Dy6  1  0.652  0.073  0.803  1.0
  Dy  Dy7  1  0.927  0.348  0.697  1.0
  B  B8  1  0.361  0.978  0.026  1.0
  B  B9  1  0.022  0.639  0.474  1.0
  B  B10  1  0.639  0.022  0.974  1.0
  B  B11  1  0.978  0.361  0.526  1.0
  B  B12  1  0.794  0.341  0.306  1.0
  B  B13  1  0.659  0.206  0.194  1.0
  B  B14  1  0.206  0.659  0.694  1.0
  B  B15  1  0.341  0.794  0.806  1.0
  B  B16  1  0.196  0.609  0.912  1.0
  B  B17  1  0.391  0.804  0.588  1.0
  B  B18  1  0.804  0.391  0.088  1.0
  B  B19  1  0.609  0.196  0.412  1.0
  O  O20  1  0.078  0.560  0.861  1.0
  O  O21  1  0.922  0.440  0.139  1.0
  O  O22  1  0.088  0.496  0.549  1.0
  O  O23  1  0.504  0.912  0.951  1.0
  O  O24  1  0.912  0.504  0.451  1.0
  O  O25  1  0.496  0.088  0.049  1.0
  O  O26  1  0.163  0.810  0.622  1.0
  O  O27  1  0.190  0.837  0.878  1.0
  O  O28  1  0.560  0.078  0.361  1.0
  O  O29  1  0.810  0.163  0.122  1.0
  O  O30  1  0.664  0.466  0.803  1.0
  O  O31  1  0.534  0.336  0.697  1.0
  O  O32  1  0.336  0.534  0.197  1.0
  O  O33  1  0.466  0.664  0.303  1.0
  O  O34  1  0.711  0.460  0.570  1.0
  O  O35  1  0.540  0.289  0.930  1.0
  O  O36  1  0.289  0.540  0.430  1.0
  O  O37  1  0.460  0.711  0.070  1.0
  O  O38  1  0.753  0.991  0.478  1.0
  O  O39  1  0.009  0.247  0.022  1.0
  O  O40  1  0.247  0.009  0.522  1.0
  O  O41  1  0.991  0.753  0.978  1.0
  O  O42  1  0.953  0.686  0.703  1.0
  O  O43  1  0.314  0.047  0.797  1.0
  O  O44  1  0.047  0.314  0.297  1.0
  O  O45  1  0.686  0.953  0.203  1.0
  O  O46  1  0.865  0.135  0.250  1.0
  O  O47  1  0.135  0.865  0.750  1.0
  O  O48  1  0.837  0.190  0.378  1.0
  O  O49  1  0.440  0.922  0.639  1.0
[/CIF]
.