The structure described by Dy3Fe2Si7 crystallizes in the orthorhombic Amm2 space group. There are three inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 14-coordinate geometry to four equivalent Fe(1), two equivalent Si(4), two equivalent Si(5), two equivalent Si(7), and four equivalent Si(2) atoms. In the second Dy site, Dy(2) is bonded in a 14-coordinate geometry to four equivalent Fe(2), two equivalent Si(1), two equivalent Si(2), two equivalent Si(3), and four equivalent Si(4) atoms. In the third Dy site, Dy(3) is bonded in a 14-coordinate geometry to one Fe(1), one Fe(2), two equivalent Si(1), two equivalent Si(3), two equivalent Si(5), two equivalent Si(7), and four equivalent Si(6) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 5-coordinate geometry to one Dy(3), four equivalent Dy(1), one Si(2), two equivalent Si(5), and two equivalent Si(7) atoms. In the second Fe site, Fe(2) is bonded in a 5-coordinate geometry to one Dy(3), four equivalent Dy(2), one Si(4), two equivalent Si(1), and two equivalent Si(3) atoms. There are seven inequivalent Si sites. In the first Si site, Si(1) is bonded in a 2-coordinate geometry to two equivalent Dy(2), two equivalent Dy(3), and two equivalent Fe(2) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Dy(2), four equivalent Dy(1), one Fe(1), and two equivalent Si(4) atoms. In the third Si site, Si(3) is bonded in a 2-coordinate geometry to two equivalent Dy(2), two equivalent Dy(3), and two equivalent Fe(2) atoms. In the fourth Si site, Si(4) is bonded in a 9-coordinate geometry to two equivalent Dy(1), four equivalent Dy(2), one Fe(2), and two equivalent Si(2) atoms. In the fifth Si site, Si(5) is bonded in a 6-coordinate geometry to two equivalent Dy(1), two equivalent Dy(3), and two equivalent Fe(1) atoms. In the sixth Si site, Si(6) is bonded in a distorted rectangular see-saw-like geometry to four equivalent Dy(3) atoms. In the seventh Si site, Si(7) is bonded in a 6-coordinate geometry to two equivalent Dy(1), two equivalent Dy(3), and two equivalent Fe(1) atoms. is represented by the CIF card [CIF]
data_Dy3Fe2Si7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.404
_cell_length_b   12.404
_cell_length_c   4.088
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   161.295
_symmetry_Int_Tables_number   1
_cell_volume   201.707
_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  0.098  0.902  0.500  1.0
  Dy  Dy1  1  0.467  0.533  0.500  1.0
  Dy  Dy2  1  0.782  0.218  0.000  1.0
  Fe  Fe3  1  0.655  0.345  0.000  1.0
  Fe  Fe4  1  0.910  0.090  0.000  1.0
  Si  Si5  1  0.371  0.629  0.000  1.0
  Si  Si6  1  0.563  0.437  0.000  1.0
  Si  Si7  1  0.872  0.128  0.500  1.0
  Si  Si8  1  0.003  0.997  0.000  1.0
  Si  Si9  1  0.194  0.806  0.000  1.0
  Si  Si10  1  0.289  0.711  0.500  1.0
  Si  Si11  1  0.693  0.307  0.500  1.0
[/CIF]
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The structure described by Dy3Fe2Si7 crystallizes in the orthorhombic Amm2 space group. There are three inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 14-coordinate geometry to four equivalent Fe(1), two equivalent Si(4), two equivalent Si(5), two equivalent Si(7), and four equivalent Si(2) atoms. In the second Dy site, Dy(2) is bonded in a 14-coordinate geometry to four equivalent Fe(2), two equivalent Si(1), two equivalent Si(2), two equivalent Si(3), and four equivalent Si(4) atoms. In the third Dy site, Dy(3) is bonded in a 14-coordinate geometry to one Fe(1), one Fe(2), two equivalent Si(1), two equivalent Si(3), two equivalent Si(5), two equivalent Si(7), and four equivalent Si(6) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 5-coordinate geometry to one Dy(3), four equivalent Dy(1), one Si(2), two equivalent Si(5), and two equivalent Si(7) atoms. In the second Fe site, Fe(2) is bonded in a 5-coordinate geometry to one Dy(3), four equivalent Dy(2), one Si(4), two equivalent Si(1), and two equivalent Si(3) atoms. There are seven inequivalent Si sites. In the first Si site, Si(1) is bonded in a 2-coordinate geometry to two equivalent Dy(2), two equivalent Dy(3), and two equivalent Fe(2) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Dy(2), four equivalent Dy(1), one Fe(1), and two equivalent Si(4) atoms. In the third Si site, Si(3) is bonded in a 2-coordinate geometry to two equivalent Dy(2), two equivalent Dy(3), and two equivalent Fe(2) atoms. In the fourth Si site, Si(4) is bonded in a 9-coordinate geometry to two equivalent Dy(1), four equivalent Dy(2), one Fe(2), and two equivalent Si(2) atoms. In the fifth Si site, Si(5) is bonded in a 6-coordinate geometry to two equivalent Dy(1), two equivalent Dy(3), and two equivalent Fe(1) atoms. In the sixth Si site, Si(6) is bonded in a distorted rectangular see-saw-like geometry to four equivalent Dy(3) atoms. In the seventh Si site, Si(7) is bonded in a 6-coordinate geometry to two equivalent Dy(1), two equivalent Dy(3), and two equivalent Fe(1) atoms. is represented by the CIF card [CIF]
data_Dy3Fe2Si7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.404
_cell_length_b   12.404
_cell_length_c   4.088
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   161.295
_symmetry_Int_Tables_number   1
_cell_volume   201.707
_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  0.098  0.902  0.500  1.0
  Dy  Dy1  1  0.467  0.533  0.500  1.0
  Dy  Dy2  1  0.782  0.218  0.000  1.0
  Fe  Fe3  1  0.655  0.345  0.000  1.0
  Fe  Fe4  1  0.910  0.090  0.000  1.0
  Si  Si5  1  0.371  0.629  0.000  1.0
  Si  Si6  1  0.563  0.437  0.000  1.0
  Si  Si7  1  0.872  0.128  0.500  1.0
  Si  Si8  1  0.003  0.997  0.000  1.0
  Si  Si9  1  0.194  0.806  0.000  1.0
  Si  Si10  1  0.289  0.711  0.500  1.0
  Si  Si11  1  0.693  0.307  0.500  1.0
[/CIF]
.