The crystal structure described by MgDy6(Sb5O12)2 crystallizes in the tetragonal I-42m space group. Mg(1) is bonded in a tetrahedral geometry to four equivalent O(3) atoms. There are six inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the second Dy site, Dy(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the third Dy site, Dy(2) is bonded in a distorted body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. In the fourth Dy site, Dy(2) is bonded in a distorted body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. In the fifth Dy site, Dy(2) is bonded in a distorted body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. In the sixth Dy site, Dy(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. There are eight inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 3-coordinate geometry to one O(4) and two equivalent O(1) atoms. In the second Sb site, Sb(2) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. In the third Sb site, Sb(2) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. In the fourth Sb site, Sb(2) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. In the fifth Sb site, Sb(1) is bonded in a 3-coordinate geometry to one O(4) and two equivalent O(1) atoms. In the sixth Sb site, Sb(1) is bonded in a 3-coordinate geometry to one O(4) and two equivalent O(1) atoms. In the seventh Sb site, Sb(3) is bonded in a 4-coordinate geometry to two equivalent O(3) and two equivalent O(4) atoms. In the eighth Sb site, Sb(1) is bonded in a 3-coordinate geometry to one O(4) and two equivalent O(1) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Dy(1), one Dy(2), one Sb(1), and one Sb(2) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Dy(1), one Dy(2), and one Sb(2) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Mg(1); two Dy(1,1); and one Sb(3) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two Dy(1,1); one Sb(1); and one Sb(3) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Dy6Mg(Sb5O12)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.488
_cell_length_b   9.488
_cell_length_c   9.488
_cell_angle_alpha   109.769
_cell_angle_beta   109.322
_cell_angle_gamma   109.322
_symmetry_Int_Tables_number   1
_cell_volume   657.496
_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  0.737  0.237  0.500  1.0
  Dy  Dy1  1  0.737  0.500  0.237  1.0
  Dy  Dy2  1  0.500  0.250  0.750  1.0
  Dy  Dy3  1  0.500  0.750  0.250  1.0
  Dy  Dy4  1  0.263  0.763  0.500  1.0
  Dy  Dy5  1  0.263  0.500  0.763  1.0
  Mg  Mg6  1  0.000  0.500  0.500  1.0
  Sb  Sb7  1  0.512  0.005  0.005  1.0
  Sb  Sb8  1  0.281  0.000  0.281  1.0
  Sb  Sb9  1  0.281  0.281  0.000  1.0
  Sb  Sb10  1  0.719  0.000  0.719  1.0
  Sb  Sb11  1  0.719  0.719  0.000  1.0
  Sb  Sb12  1  0.000  0.507  0.995  1.0
  Sb  Sb13  1  0.000  0.995  0.507  1.0
  Sb  Sb14  1  0.488  0.493  0.493  1.0
  Sb  Sb15  1  0.000  0.245  0.245  1.0
  Sb  Sb16  1  0.000  0.755  0.755  1.0
  O  O17  1  0.484  0.009  0.212  1.0
  O  O18  1  0.484  0.212  0.009  1.0
  O  O19  1  0.705  0.501  0.994  1.0
  O  O20  1  0.705  0.994  0.501  1.0
  O  O21  1  0.799  0.302  0.302  1.0
  O  O22  1  0.493  0.499  0.204  1.0
  O  O23  1  0.493  0.204  0.499  1.0
  O  O24  1  0.507  0.711  0.006  1.0
  O  O25  1  0.507  0.006  0.711  1.0
  O  O26  1  0.732  0.545  0.545  1.0
  O  O27  1  0.797  0.272  0.788  1.0
  O  O28  1  0.797  0.788  0.272  1.0
  O  O29  1  0.203  0.475  0.991  1.0
  O  O30  1  0.203  0.991  0.475  1.0
  O  O31  1  0.516  0.728  0.525  1.0
  O  O32  1  0.516  0.525  0.728  1.0
  O  O33  1  0.000  0.455  0.187  1.0
  O  O34  1  0.000  0.187  0.455  1.0
  O  O35  1  0.295  0.796  0.289  1.0
  O  O36  1  0.295  0.289  0.796  1.0
  O  O37  1  0.201  0.503  0.503  1.0
  O  O38  1  0.000  0.698  0.497  1.0
  O  O39  1  0.000  0.497  0.698  1.0
  O  O40  1  0.268  0.813  0.813  1.0
[/CIF]
.
The crystal structure described by MgDy6(Sb5O12)2 crystallizes in the tetragonal I-42m space group. Mg(1) is bonded in a tetrahedral geometry to four equivalent O(3) atoms. There are six inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the second Dy site, Dy(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the third Dy site, Dy(2) is bonded in a distorted body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. In the fourth Dy site, Dy(2) is bonded in a distorted body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. In the fifth Dy site, Dy(2) is bonded in a distorted body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. In the sixth Dy site, Dy(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. There are eight inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 3-coordinate geometry to one O(4) and two equivalent O(1) atoms. In the second Sb site, Sb(2) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. In the third Sb site, Sb(2) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. In the fourth Sb site, Sb(2) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. In the fifth Sb site, Sb(1) is bonded in a 3-coordinate geometry to one O(4) and two equivalent O(1) atoms. In the sixth Sb site, Sb(1) is bonded in a 3-coordinate geometry to one O(4) and two equivalent O(1) atoms. In the seventh Sb site, Sb(3) is bonded in a 4-coordinate geometry to two equivalent O(3) and two equivalent O(4) atoms. In the eighth Sb site, Sb(1) is bonded in a 3-coordinate geometry to one O(4) and two equivalent O(1) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Dy(1), one Dy(2), one Sb(1), and one Sb(2) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Dy(1), one Dy(2), and one Sb(2) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Mg(1); two Dy(1,1); and one Sb(3) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two Dy(1,1); one Sb(1); and one Sb(3) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Dy6Mg(Sb5O12)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.488
_cell_length_b   9.488
_cell_length_c   9.488
_cell_angle_alpha   109.769
_cell_angle_beta   109.322
_cell_angle_gamma   109.322
_symmetry_Int_Tables_number   1
_cell_volume   657.496
_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  0.737  0.237  0.500  1.0
  Dy  Dy1  1  0.737  0.500  0.237  1.0
  Dy  Dy2  1  0.500  0.250  0.750  1.0
  Dy  Dy3  1  0.500  0.750  0.250  1.0
  Dy  Dy4  1  0.263  0.763  0.500  1.0
  Dy  Dy5  1  0.263  0.500  0.763  1.0
  Mg  Mg6  1  0.000  0.500  0.500  1.0
  Sb  Sb7  1  0.512  0.005  0.005  1.0
  Sb  Sb8  1  0.281  0.000  0.281  1.0
  Sb  Sb9  1  0.281  0.281  0.000  1.0
  Sb  Sb10  1  0.719  0.000  0.719  1.0
  Sb  Sb11  1  0.719  0.719  0.000  1.0
  Sb  Sb12  1  0.000  0.507  0.995  1.0
  Sb  Sb13  1  0.000  0.995  0.507  1.0
  Sb  Sb14  1  0.488  0.493  0.493  1.0
  Sb  Sb15  1  0.000  0.245  0.245  1.0
  Sb  Sb16  1  0.000  0.755  0.755  1.0
  O  O17  1  0.484  0.009  0.212  1.0
  O  O18  1  0.484  0.212  0.009  1.0
  O  O19  1  0.705  0.501  0.994  1.0
  O  O20  1  0.705  0.994  0.501  1.0
  O  O21  1  0.799  0.302  0.302  1.0
  O  O22  1  0.493  0.499  0.204  1.0
  O  O23  1  0.493  0.204  0.499  1.0
  O  O24  1  0.507  0.711  0.006  1.0
  O  O25  1  0.507  0.006  0.711  1.0
  O  O26  1  0.732  0.545  0.545  1.0
  O  O27  1  0.797  0.272  0.788  1.0
  O  O28  1  0.797  0.788  0.272  1.0
  O  O29  1  0.203  0.475  0.991  1.0
  O  O30  1  0.203  0.991  0.475  1.0
  O  O31  1  0.516  0.728  0.525  1.0
  O  O32  1  0.516  0.525  0.728  1.0
  O  O33  1  0.000  0.455  0.187  1.0
  O  O34  1  0.000  0.187  0.455  1.0
  O  O35  1  0.295  0.796  0.289  1.0
  O  O36  1  0.295  0.289  0.796  1.0
  O  O37  1  0.201  0.503  0.503  1.0
  O  O38  1  0.000  0.698  0.497  1.0
  O  O39  1  0.000  0.497  0.698  1.0
  O  O40  1  0.268  0.813  0.813  1.0
[/CIF]
.