The structure described by Ce5Si3 crystallizes in the orthorhombic Cmcm space group. There are three inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 6-coordinate geometry to two equivalent Si(1) and four equivalent Si(2) atoms. In the second Ce site, Ce(2) is bonded in a 5-coordinate geometry to two equivalent Si(2) and three equivalent Si(1) atoms. In the third Ce site, Ce(3) is bonded in a 5-coordinate geometry to one Si(1) and four equivalent Si(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to two equivalent Ce(3), three equivalent Ce(2), and four equivalent Ce(1) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to one Ce(2), four equivalent Ce(1), and four equivalent Ce(3) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ce5Si3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.972
_cell_length_b   8.875
_cell_length_c   8.836
_cell_angle_alpha   120.146
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   404.957
_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
  Ce  Ce0  1  0.500  0.333  0.666  1.0
  Ce  Ce1  1  0.500  0.667  0.334  1.0
  Ce  Ce2  1  0.000  0.667  0.334  1.0
  Ce  Ce3  1  0.000  0.333  0.666  1.0
  Ce  Ce4  1  0.750  0.261  0.000  1.0
  Ce  Ce5  1  0.750  0.739  0.739  1.0
  Ce  Ce6  1  0.750  0.000  0.261  1.0
  Ce  Ce7  1  0.250  0.739  0.000  1.0
  Ce  Ce8  1  0.250  0.261  0.261  1.0
  Ce  Ce9  1  0.250  1.000  0.739  1.0
  Si  Si10  1  0.750  0.616  0.000  1.0
  Si  Si11  1  0.750  0.384  0.384  1.0
  Si  Si12  1  0.750  1.000  0.616  1.0
  Si  Si13  1  0.250  0.384  0.000  1.0
  Si  Si14  1  0.250  0.616  0.616  1.0
  Si  Si15  1  0.250  0.000  0.384  1.0
[/CIF]
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The structure described by Ce5Si3 crystallizes in the orthorhombic Cmcm space group. There are three inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 6-coordinate geometry to two equivalent Si(1) and four equivalent Si(2) atoms. In the second Ce site, Ce(2) is bonded in a 5-coordinate geometry to two equivalent Si(2) and three equivalent Si(1) atoms. In the third Ce site, Ce(3) is bonded in a 5-coordinate geometry to one Si(1) and four equivalent Si(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to two equivalent Ce(3), three equivalent Ce(2), and four equivalent Ce(1) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to one Ce(2), four equivalent Ce(1), and four equivalent Ce(3) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ce5Si3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.972
_cell_length_b   8.875
_cell_length_c   8.836
_cell_angle_alpha   120.146
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   404.957
_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
  Ce  Ce0  1  0.500  0.333  0.666  1.0
  Ce  Ce1  1  0.500  0.667  0.334  1.0
  Ce  Ce2  1  0.000  0.667  0.334  1.0
  Ce  Ce3  1  0.000  0.333  0.666  1.0
  Ce  Ce4  1  0.750  0.261  0.000  1.0
  Ce  Ce5  1  0.750  0.739  0.739  1.0
  Ce  Ce6  1  0.750  0.000  0.261  1.0
  Ce  Ce7  1  0.250  0.739  0.000  1.0
  Ce  Ce8  1  0.250  0.261  0.261  1.0
  Ce  Ce9  1  0.250  1.000  0.739  1.0
  Si  Si10  1  0.750  0.616  0.000  1.0
  Si  Si11  1  0.750  0.384  0.384  1.0
  Si  Si12  1  0.750  1.000  0.616  1.0
  Si  Si13  1  0.250  0.384  0.000  1.0
  Si  Si14  1  0.250  0.616  0.616  1.0
  Si  Si15  1  0.250  0.000  0.384  1.0
[/CIF]
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