The structure described by LuFe2Si2 crystallizes in the tetragonal I4/mmm space group. Lu(1) is bonded in a 16-coordinate geometry to eight equivalent Fe(1) and eight equivalent Si(1) atoms. Fe(1) is bonded to four equivalent Lu(1) and four equivalent Si(1) atoms to form a mixture of distorted corner, face, and edge-sharing FeLu4Si4 tetrahedra. Si(1) is bonded in a 9-coordinate geometry to four equivalent Lu(1), four equivalent Fe(1), and one Si(1) atom. is represented by the CIF file [CIF]
data_Lu(FeSi)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.841
_cell_length_b   3.841
_cell_length_c   5.571
_cell_angle_alpha   110.167
_cell_angle_beta   110.167
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   71.757
_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
  Lu  Lu0  1  0.000  0.000  0.000  1.0
  Fe  Fe1  1  0.250  0.750  0.500  1.0
  Fe  Fe2  1  0.750  0.250  0.500  1.0
  Si  Si3  1  0.374  0.374  0.748  1.0
  Si  Si4  1  0.626  0.626  0.252  1.0
[/CIF]
.
The structure described by LuFe2Si2 crystallizes in the tetragonal I4/mmm space group. Lu(1) is bonded in a 16-coordinate geometry to eight equivalent Fe(1) and eight equivalent Si(1) atoms. Fe(1) is bonded to four equivalent Lu(1) and four equivalent Si(1) atoms to form a mixture of distorted corner, face, and edge-sharing FeLu4Si4 tetrahedra. Si(1) is bonded in a 9-coordinate geometry to four equivalent Lu(1), four equivalent Fe(1), and one Si(1) atom. is represented by the CIF file [CIF]
data_Lu(FeSi)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.841
_cell_length_b   3.841
_cell_length_c   5.571
_cell_angle_alpha   110.167
_cell_angle_beta   110.167
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   71.757
_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
  Lu  Lu0  1  0.000  0.000  0.000  1.0
  Fe  Fe1  1  0.250  0.750  0.500  1.0
  Fe  Fe2  1  0.750  0.250  0.500  1.0
  Si  Si3  1  0.374  0.374  0.748  1.0
  Si  Si4  1  0.626  0.626  0.252  1.0
[/CIF]
.