The crystal structure described by Eu3Sn5 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 10-coordinate geometry to two equivalent Sn(2), four equivalent Sn(1), and four equivalent Sn(3) atoms. In the second Eu site, Eu(2) is bonded in a 9-coordinate geometry to one Sn(2), four equivalent Sn(1), and four equivalent Sn(3) atoms. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 9-coordinate geometry to two equivalent Eu(2), four equivalent Eu(1), one Sn(2), and two equivalent Sn(3) atoms. In the second Sn site, Sn(2) is bonded in a 9-coordinate geometry to one Eu(2), four equivalent Eu(1), two equivalent Sn(1), and two equivalent Sn(3) atoms. In the third Sn site, Sn(3) is bonded in a 10-coordinate geometry to two equivalent Eu(2), four equivalent Eu(1), one Sn(2), one Sn(3), and two equivalent Sn(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Eu3Sn5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.729
_cell_length_b   6.729
_cell_length_c   10.616
_cell_angle_alpha   90.002
_cell_angle_beta   90.002
_cell_angle_gamma   102.121
_symmetry_Int_Tables_number   1
_cell_volume   469.994
_cell_formula_units_Z   2
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
  Eu  Eu0  1  0.206  0.794  1.000  1.0
  Eu  Eu1  1  0.794  0.206  0.000  1.0
  Eu  Eu2  1  0.795  0.205  0.500  1.0
  Eu  Eu3  1  0.205  0.795  0.500  1.0
  Eu  Eu4  1  0.638  0.638  0.250  1.0
  Eu  Eu5  1  0.362  0.362  0.750  1.0
  Sn  Sn6  1  0.490  0.081  0.250  1.0
  Sn  Sn7  1  0.510  0.919  0.750  1.0
  Sn  Sn8  1  0.081  0.490  0.250  1.0
  Sn  Sn9  1  0.919  0.510  0.750  1.0
  Sn  Sn10  1  0.031  0.031  0.250  1.0
  Sn  Sn11  1  0.969  0.969  0.750  1.0
  Sn  Sn12  1  0.307  0.307  0.051  1.0
  Sn  Sn13  1  0.693  0.693  0.949  1.0
  Sn  Sn14  1  0.693  0.693  0.551  1.0
  Sn  Sn15  1  0.307  0.307  0.449  1.0
[/CIF]
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The crystal structure described by Eu3Sn5 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 10-coordinate geometry to two equivalent Sn(2), four equivalent Sn(1), and four equivalent Sn(3) atoms. In the second Eu site, Eu(2) is bonded in a 9-coordinate geometry to one Sn(2), four equivalent Sn(1), and four equivalent Sn(3) atoms. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 9-coordinate geometry to two equivalent Eu(2), four equivalent Eu(1), one Sn(2), and two equivalent Sn(3) atoms. In the second Sn site, Sn(2) is bonded in a 9-coordinate geometry to one Eu(2), four equivalent Eu(1), two equivalent Sn(1), and two equivalent Sn(3) atoms. In the third Sn site, Sn(3) is bonded in a 10-coordinate geometry to two equivalent Eu(2), four equivalent Eu(1), one Sn(2), one Sn(3), and two equivalent Sn(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Eu3Sn5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.729
_cell_length_b   6.729
_cell_length_c   10.616
_cell_angle_alpha   90.002
_cell_angle_beta   90.002
_cell_angle_gamma   102.121
_symmetry_Int_Tables_number   1
_cell_volume   469.994
_cell_formula_units_Z   2
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
  Eu  Eu0  1  0.206  0.794  1.000  1.0
  Eu  Eu1  1  0.794  0.206  0.000  1.0
  Eu  Eu2  1  0.795  0.205  0.500  1.0
  Eu  Eu3  1  0.205  0.795  0.500  1.0
  Eu  Eu4  1  0.638  0.638  0.250  1.0
  Eu  Eu5  1  0.362  0.362  0.750  1.0
  Sn  Sn6  1  0.490  0.081  0.250  1.0
  Sn  Sn7  1  0.510  0.919  0.750  1.0
  Sn  Sn8  1  0.081  0.490  0.250  1.0
  Sn  Sn9  1  0.919  0.510  0.750  1.0
  Sn  Sn10  1  0.031  0.031  0.250  1.0
  Sn  Sn11  1  0.969  0.969  0.750  1.0
  Sn  Sn12  1  0.307  0.307  0.051  1.0
  Sn  Sn13  1  0.693  0.693  0.949  1.0
  Sn  Sn14  1  0.693  0.693  0.551  1.0
  Sn  Sn15  1  0.307  0.307  0.449  1.0
[/CIF]
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