The structure described by DyGaSe3 crystallizes in the orthorhombic Pnma space group. Dy(1) is bonded to one Se(2), three equivalent Se(1), and three equivalent Se(3) atoms to form distorted DySe7 pentagonal bipyramids that share corners with eight equivalent Ga(1)Se5 square pyramids, edges with six equivalent Dy(1)Se7 pentagonal bipyramids, and  a faceface with one Ga(1)Se5 square pyramid. Ga(1) is bonded to one Se(1), two equivalent Se(2), and two equivalent Se(3) atoms to form distorted GaSe5 square pyramids that share corners with eight equivalent Dy(1)Se7 pentagonal bipyramids, edges with two equivalent Ga(1)Se5 square pyramids, and  a faceface with one Dy(1)Se7 pentagonal bipyramid. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded to three equivalent Dy(1) and one Ga(1) atom to form a mixture of distorted corner and edge-sharing SeDy3Ga trigonal pyramids. In the second Se site, Se(2) is bonded in a trigonal planar geometry to one Dy(1) and two equivalent Ga(1) atoms. In the third Se site, Se(3) is bonded in a 5-coordinate geometry to three equivalent Dy(1) and two equivalent Ga(1) atoms. is represented by the CIF file [CIF]
data_DyGaSe3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.935
_cell_length_b   7.924
_cell_length_c   16.255
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   506.784
_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  0.250  0.762  0.456  1.0
  Dy  Dy1  1  0.250  0.262  0.044  1.0
  Dy  Dy2  1  0.750  0.238  0.544  1.0
  Dy  Dy3  1  0.750  0.738  0.956  1.0
  Ga  Ga4  1  0.250  0.249  0.820  1.0
  Ga  Ga5  1  0.250  0.749  0.680  1.0
  Ga  Ga6  1  0.750  0.751  0.180  1.0
  Ga  Ga7  1  0.750  0.251  0.320  1.0
  Se  Se8  1  0.250  0.004  0.592  1.0
  Se  Se9  1  0.250  0.504  0.908  1.0
  Se  Se10  1  0.750  0.996  0.408  1.0
  Se  Se11  1  0.750  0.496  0.092  1.0
  Se  Se12  1  0.250  0.233  0.228  1.0
  Se  Se13  1  0.250  0.733  0.272  1.0
  Se  Se14  1  0.750  0.767  0.772  1.0
  Se  Se15  1  0.750  0.267  0.728  1.0
  Se  Se16  1  0.250  0.391  0.429  1.0
  Se  Se17  1  0.250  0.891  0.071  1.0
  Se  Se18  1  0.750  0.609  0.571  1.0
  Se  Se19  1  0.750  0.109  0.929  1.0
[/CIF]
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The structure described by DyGaSe3 crystallizes in the orthorhombic Pnma space group. Dy(1) is bonded to one Se(2), three equivalent Se(1), and three equivalent Se(3) atoms to form distorted DySe7 pentagonal bipyramids that share corners with eight equivalent Ga(1)Se5 square pyramids, edges with six equivalent Dy(1)Se7 pentagonal bipyramids, and  a faceface with one Ga(1)Se5 square pyramid. Ga(1) is bonded to one Se(1), two equivalent Se(2), and two equivalent Se(3) atoms to form distorted GaSe5 square pyramids that share corners with eight equivalent Dy(1)Se7 pentagonal bipyramids, edges with two equivalent Ga(1)Se5 square pyramids, and  a faceface with one Dy(1)Se7 pentagonal bipyramid. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded to three equivalent Dy(1) and one Ga(1) atom to form a mixture of distorted corner and edge-sharing SeDy3Ga trigonal pyramids. In the second Se site, Se(2) is bonded in a trigonal planar geometry to one Dy(1) and two equivalent Ga(1) atoms. In the third Se site, Se(3) is bonded in a 5-coordinate geometry to three equivalent Dy(1) and two equivalent Ga(1) atoms. is represented by the CIF file [CIF]
data_DyGaSe3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.935
_cell_length_b   7.924
_cell_length_c   16.255
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   506.784
_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  0.250  0.762  0.456  1.0
  Dy  Dy1  1  0.250  0.262  0.044  1.0
  Dy  Dy2  1  0.750  0.238  0.544  1.0
  Dy  Dy3  1  0.750  0.738  0.956  1.0
  Ga  Ga4  1  0.250  0.249  0.820  1.0
  Ga  Ga5  1  0.250  0.749  0.680  1.0
  Ga  Ga6  1  0.750  0.751  0.180  1.0
  Ga  Ga7  1  0.750  0.251  0.320  1.0
  Se  Se8  1  0.250  0.004  0.592  1.0
  Se  Se9  1  0.250  0.504  0.908  1.0
  Se  Se10  1  0.750  0.996  0.408  1.0
  Se  Se11  1  0.750  0.496  0.092  1.0
  Se  Se12  1  0.250  0.233  0.228  1.0
  Se  Se13  1  0.250  0.733  0.272  1.0
  Se  Se14  1  0.750  0.767  0.772  1.0
  Se  Se15  1  0.750  0.267  0.728  1.0
  Se  Se16  1  0.250  0.391  0.429  1.0
  Se  Se17  1  0.250  0.891  0.071  1.0
  Se  Se18  1  0.750  0.609  0.571  1.0
  Se  Se19  1  0.750  0.109  0.929  1.0
[/CIF]
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