The structure described by Dy2SiO5 crystallizes in the monoclinic P2_1/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(5), two equivalent O(2), two equivalent O(3), and three equivalent O(1) atoms. In the second Dy site, Dy(2) is bonded in a 7-coordinate geometry to one O(3), three equivalent O(4), and three equivalent O(5) atoms. Si(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to three equivalent Dy(1) and one Si(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Dy(1) and one Si(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Dy(2), two equivalent Dy(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to three equivalent Dy(2) and one Si(1) atom. In the fifth O site, O(5) is bonded to one Dy(1) and three equivalent Dy(2) atoms to form a mixture of corner and edge-sharing ODy4 tetrahedra. is represented by the CIF card [CIF]
data_Dy2SiO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.903
_cell_length_b   6.753
_cell_length_c   9.140
_cell_angle_alpha   74.132
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   409.888
_cell_formula_units_Z   4
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  0.360  0.443  0.874  1.0
  Dy  Dy1  1  0.140  0.943  0.874  1.0
  Dy  Dy2  1  0.124  0.769  0.529  1.0
  Dy  Dy3  1  0.624  0.731  0.471  1.0
  Dy  Dy4  1  0.376  0.269  0.529  1.0
  Dy  Dy5  1  0.876  0.231  0.471  1.0
  Dy  Dy6  1  0.860  0.057  0.126  1.0
  Dy  Dy7  1  0.640  0.557  0.126  1.0
  Si  Si8  1  0.910  0.475  0.799  1.0
  Si  Si9  1  0.590  0.975  0.799  1.0
  Si  Si10  1  0.410  0.025  0.201  1.0
  Si  Si11  1  0.090  0.525  0.201  1.0
  O  O12  1  0.050  0.276  0.872  1.0
  O  O13  1  0.717  0.480  0.896  1.0
  O  O14  1  0.450  0.776  0.872  1.0
  O  O15  1  0.072  0.662  0.792  1.0
  O  O16  1  0.783  0.980  0.896  1.0
  O  O17  1  0.864  0.514  0.615  1.0
  O  O18  1  0.381  0.561  0.614  1.0
  O  O19  1  0.428  0.162  0.792  1.0
  O  O20  1  0.636  0.014  0.615  1.0
  O  O21  1  0.119  0.061  0.614  1.0
  O  O22  1  0.881  0.939  0.386  1.0
  O  O23  1  0.364  0.986  0.385  1.0
  O  O24  1  0.572  0.838  0.208  1.0
  O  O25  1  0.619  0.439  0.386  1.0
  O  O26  1  0.136  0.486  0.385  1.0
  O  O27  1  0.217  0.020  0.104  1.0
  O  O28  1  0.928  0.338  0.208  1.0
  O  O29  1  0.550  0.224  0.128  1.0
  O  O30  1  0.283  0.520  0.104  1.0
  O  O31  1  0.950  0.724  0.128  1.0
[/CIF]
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The structure described by Dy2SiO5 crystallizes in the monoclinic P2_1/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(5), two equivalent O(2), two equivalent O(3), and three equivalent O(1) atoms. In the second Dy site, Dy(2) is bonded in a 7-coordinate geometry to one O(3), three equivalent O(4), and three equivalent O(5) atoms. Si(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to three equivalent Dy(1) and one Si(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Dy(1) and one Si(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Dy(2), two equivalent Dy(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to three equivalent Dy(2) and one Si(1) atom. In the fifth O site, O(5) is bonded to one Dy(1) and three equivalent Dy(2) atoms to form a mixture of corner and edge-sharing ODy4 tetrahedra. is represented by the CIF card [CIF]
data_Dy2SiO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.903
_cell_length_b   6.753
_cell_length_c   9.140
_cell_angle_alpha   74.132
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   409.888
_cell_formula_units_Z   4
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  0.360  0.443  0.874  1.0
  Dy  Dy1  1  0.140  0.943  0.874  1.0
  Dy  Dy2  1  0.124  0.769  0.529  1.0
  Dy  Dy3  1  0.624  0.731  0.471  1.0
  Dy  Dy4  1  0.376  0.269  0.529  1.0
  Dy  Dy5  1  0.876  0.231  0.471  1.0
  Dy  Dy6  1  0.860  0.057  0.126  1.0
  Dy  Dy7  1  0.640  0.557  0.126  1.0
  Si  Si8  1  0.910  0.475  0.799  1.0
  Si  Si9  1  0.590  0.975  0.799  1.0
  Si  Si10  1  0.410  0.025  0.201  1.0
  Si  Si11  1  0.090  0.525  0.201  1.0
  O  O12  1  0.050  0.276  0.872  1.0
  O  O13  1  0.717  0.480  0.896  1.0
  O  O14  1  0.450  0.776  0.872  1.0
  O  O15  1  0.072  0.662  0.792  1.0
  O  O16  1  0.783  0.980  0.896  1.0
  O  O17  1  0.864  0.514  0.615  1.0
  O  O18  1  0.381  0.561  0.614  1.0
  O  O19  1  0.428  0.162  0.792  1.0
  O  O20  1  0.636  0.014  0.615  1.0
  O  O21  1  0.119  0.061  0.614  1.0
  O  O22  1  0.881  0.939  0.386  1.0
  O  O23  1  0.364  0.986  0.385  1.0
  O  O24  1  0.572  0.838  0.208  1.0
  O  O25  1  0.619  0.439  0.386  1.0
  O  O26  1  0.136  0.486  0.385  1.0
  O  O27  1  0.217  0.020  0.104  1.0
  O  O28  1  0.928  0.338  0.208  1.0
  O  O29  1  0.550  0.224  0.128  1.0
  O  O30  1  0.283  0.520  0.104  1.0
  O  O31  1  0.950  0.724  0.128  1.0
[/CIF]
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