The compound described by EuSi6 crystallizes in the orthorhombic Cmcm space group. Eu(1) is bonded in a 18-coordinate geometry to six equivalent Si(1), six equivalent Si(2), and six equivalent Si(3) atoms. There are three inequivalent Si sites. In the first Si site, Si(2) is bonded in a 7-coordinate geometry to three equivalent Eu(1), one Si(1), one Si(2), and two equivalent Si(3) atoms. In the second Si site, Si(1) is bonded in a 7-coordinate geometry to three equivalent Eu(1), one Si(2), one Si(3), and two equivalent Si(1) atoms. In the third Si site, Si(3) is bonded in a 7-coordinate geometry to three equivalent Eu(1), one Si(1), one Si(3), and two equivalent Si(2) atoms. is represented by the CIF card [CIF]
data_EuSi6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.567
_cell_length_b   5.567
_cell_length_c   11.549
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   132.336
_symmetry_Int_Tables_number   1
_cell_volume   264.578
_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  0.727  0.273  0.750  1.0
  Eu  Eu1  1  0.273  0.727  0.250  1.0
  Si  Si2  1  0.753  0.247  0.463  1.0
  Si  Si3  1  0.247  0.753  0.537  1.0
  Si  Si4  1  0.247  0.753  0.963  1.0
  Si  Si5  1  0.753  0.247  0.037  1.0
  Si  Si6  1  0.444  0.556  0.647  1.0
  Si  Si7  1  0.556  0.444  0.353  1.0
  Si  Si8  1  0.556  0.444  0.147  1.0
  Si  Si9  1  0.444  0.556  0.853  1.0
  Si  Si10  1  0.978  0.022  0.397  1.0
  Si  Si11  1  0.022  0.978  0.603  1.0
  Si  Si12  1  0.022  0.978  0.897  1.0
  Si  Si13  1  0.978  0.022  0.103  1.0
[/CIF]
.
The compound described by EuSi6 crystallizes in the orthorhombic Cmcm space group. Eu(1) is bonded in a 18-coordinate geometry to six equivalent Si(1), six equivalent Si(2), and six equivalent Si(3) atoms. There are three inequivalent Si sites. In the first Si site, Si(2) is bonded in a 7-coordinate geometry to three equivalent Eu(1), one Si(1), one Si(2), and two equivalent Si(3) atoms. In the second Si site, Si(1) is bonded in a 7-coordinate geometry to three equivalent Eu(1), one Si(2), one Si(3), and two equivalent Si(1) atoms. In the third Si site, Si(3) is bonded in a 7-coordinate geometry to three equivalent Eu(1), one Si(1), one Si(3), and two equivalent Si(2) atoms. is represented by the CIF card [CIF]
data_EuSi6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.567
_cell_length_b   5.567
_cell_length_c   11.549
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   132.336
_symmetry_Int_Tables_number   1
_cell_volume   264.578
_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  0.727  0.273  0.750  1.0
  Eu  Eu1  1  0.273  0.727  0.250  1.0
  Si  Si2  1  0.753  0.247  0.463  1.0
  Si  Si3  1  0.247  0.753  0.537  1.0
  Si  Si4  1  0.247  0.753  0.963  1.0
  Si  Si5  1  0.753  0.247  0.037  1.0
  Si  Si6  1  0.444  0.556  0.647  1.0
  Si  Si7  1  0.556  0.444  0.353  1.0
  Si  Si8  1  0.556  0.444  0.147  1.0
  Si  Si9  1  0.444  0.556  0.853  1.0
  Si  Si10  1  0.978  0.022  0.397  1.0
  Si  Si11  1  0.022  0.978  0.603  1.0
  Si  Si12  1  0.022  0.978  0.897  1.0
  Si  Si13  1  0.978  0.022  0.103  1.0
[/CIF]
.