The crystal structure described by MgDy2V2O7 crystallizes in the monoclinic Cm space group. Mg(1) is bonded in a 5-coordinate geometry to one O(4), two equivalent O(1), and two equivalent O(5) atoms. Dy(1) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(5) atoms to form distorted DyO6 pentagonal pyramids that share corners with two equivalent V(1)O5 trigonal bipyramids, corners with two equivalent V(2)O5 trigonal bipyramids, edges with three equivalent Dy(1)O6 pentagonal pyramids,  an edgeedge with one V(1)O5 trigonal bipyramid, and  an edgeedge with one V(2)O5 trigonal bipyramid. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(2), one O(3), one O(4), and two equivalent O(1) atoms to form distorted VO5 trigonal bipyramids that share corners with four equivalent Dy(1)O6 pentagonal pyramids,  a cornercorner with one V(2)O5 trigonal bipyramid, edges with two equivalent Dy(1)O6 pentagonal pyramids, and  an edgeedge with one V(2)O5 trigonal bipyramid. In the second V site, V(2) is bonded to one O(2), one O(3), one O(4), and two equivalent O(5) atoms to form VO5 trigonal bipyramids that share corners with four equivalent Dy(1)O6 pentagonal pyramids,  a cornercorner with one V(1)O5 trigonal bipyramid, edges with two equivalent Dy(1)O6 pentagonal pyramids, and  an edgeedge with one V(1)O5 trigonal bipyramid. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), two equivalent Dy(1), and one V(1) atom to form distorted ODy2MgV tetrahedra that share corners with two equivalent O(1)Dy2MgV tetrahedra,  a cornercorner with one O(3)Dy2V2 trigonal pyramid, corners with three equivalent O(2)Dy2V2 trigonal pyramids,  an edgeedge with one O(1)Dy2MgV tetrahedra, and  an edgeedge with one O(3)Dy2V2 trigonal pyramid. In the second O site, O(2) is bonded to two equivalent Dy(1), one V(1), and one V(2) atom to form ODy2V2 trigonal pyramids that share corners with six equivalent O(1)Dy2MgV tetrahedra and edges with two equivalent O(3)Dy2V2 trigonal pyramids. In the third O site, O(3) is bonded to two equivalent Dy(1), one V(1), and one V(2) atom to form ODy2V2 trigonal pyramids that share corners with two equivalent O(1)Dy2MgV tetrahedra, edges with two equivalent O(1)Dy2MgV tetrahedra, and edges with two equivalent O(2)Dy2V2 trigonal pyramids. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Mg(1), one V(1), and one V(2) atom. In the fifth O site, O(5) is bonded in a distorted see-saw-like geometry to one Mg(1), two equivalent Dy(1), and one V(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Dy2MgV2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.915
_cell_length_b   5.915
_cell_length_c   5.515
_cell_angle_alpha   85.686
_cell_angle_beta   94.325
_cell_angle_gamma   68.842
_symmetry_Int_Tables_number   1
_cell_volume   178.355
_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
  Dy  Dy0  1  0.328  0.313  0.501  1.0
  Dy  Dy1  1  0.687  0.672  0.501  1.0
  Mg  Mg2  1  0.056  0.945  0.411  1.0
  V  V3  1  0.259  0.741  0.905  1.0
  V  V4  1  0.728  0.272  0.099  1.0
  O  O5  1  0.059  0.657  0.640  1.0
  O  O6  1  0.343  0.941  0.640  1.0
  O  O7  1  0.435  0.565  0.230  1.0
  O  O8  1  0.564  0.436  0.776  1.0
  O  O9  1  0.019  0.981  0.044  1.0
  O  O10  1  0.655  0.048  0.332  1.0
  O  O11  1  0.952  0.345  0.332  1.0
[/CIF]
.
The crystal structure described by MgDy2V2O7 crystallizes in the monoclinic Cm space group. Mg(1) is bonded in a 5-coordinate geometry to one O(4), two equivalent O(1), and two equivalent O(5) atoms. Dy(1) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(5) atoms to form distorted DyO6 pentagonal pyramids that share corners with two equivalent V(1)O5 trigonal bipyramids, corners with two equivalent V(2)O5 trigonal bipyramids, edges with three equivalent Dy(1)O6 pentagonal pyramids,  an edgeedge with one V(1)O5 trigonal bipyramid, and  an edgeedge with one V(2)O5 trigonal bipyramid. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(2), one O(3), one O(4), and two equivalent O(1) atoms to form distorted VO5 trigonal bipyramids that share corners with four equivalent Dy(1)O6 pentagonal pyramids,  a cornercorner with one V(2)O5 trigonal bipyramid, edges with two equivalent Dy(1)O6 pentagonal pyramids, and  an edgeedge with one V(2)O5 trigonal bipyramid. In the second V site, V(2) is bonded to one O(2), one O(3), one O(4), and two equivalent O(5) atoms to form VO5 trigonal bipyramids that share corners with four equivalent Dy(1)O6 pentagonal pyramids,  a cornercorner with one V(1)O5 trigonal bipyramid, edges with two equivalent Dy(1)O6 pentagonal pyramids, and  an edgeedge with one V(1)O5 trigonal bipyramid. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), two equivalent Dy(1), and one V(1) atom to form distorted ODy2MgV tetrahedra that share corners with two equivalent O(1)Dy2MgV tetrahedra,  a cornercorner with one O(3)Dy2V2 trigonal pyramid, corners with three equivalent O(2)Dy2V2 trigonal pyramids,  an edgeedge with one O(1)Dy2MgV tetrahedra, and  an edgeedge with one O(3)Dy2V2 trigonal pyramid. In the second O site, O(2) is bonded to two equivalent Dy(1), one V(1), and one V(2) atom to form ODy2V2 trigonal pyramids that share corners with six equivalent O(1)Dy2MgV tetrahedra and edges with two equivalent O(3)Dy2V2 trigonal pyramids. In the third O site, O(3) is bonded to two equivalent Dy(1), one V(1), and one V(2) atom to form ODy2V2 trigonal pyramids that share corners with two equivalent O(1)Dy2MgV tetrahedra, edges with two equivalent O(1)Dy2MgV tetrahedra, and edges with two equivalent O(2)Dy2V2 trigonal pyramids. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Mg(1), one V(1), and one V(2) atom. In the fifth O site, O(5) is bonded in a distorted see-saw-like geometry to one Mg(1), two equivalent Dy(1), and one V(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Dy2MgV2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.915
_cell_length_b   5.915
_cell_length_c   5.515
_cell_angle_alpha   85.686
_cell_angle_beta   94.325
_cell_angle_gamma   68.842
_symmetry_Int_Tables_number   1
_cell_volume   178.355
_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
  Dy  Dy0  1  0.328  0.313  0.501  1.0
  Dy  Dy1  1  0.687  0.672  0.501  1.0
  Mg  Mg2  1  0.056  0.945  0.411  1.0
  V  V3  1  0.259  0.741  0.905  1.0
  V  V4  1  0.728  0.272  0.099  1.0
  O  O5  1  0.059  0.657  0.640  1.0
  O  O6  1  0.343  0.941  0.640  1.0
  O  O7  1  0.435  0.565  0.230  1.0
  O  O8  1  0.564  0.436  0.776  1.0
  O  O9  1  0.019  0.981  0.044  1.0
  O  O10  1  0.655  0.048  0.332  1.0
  O  O11  1  0.952  0.345  0.332  1.0
[/CIF]
.