The structure described by Er4AlSi3 is Heusler-like structured and crystallizes in the tetragonal P4/mmm space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a body-centered cubic geometry to four equivalent Al(1) and four equivalent Si(1) atoms. In the second Er site, Er(2) is bonded in a body-centered cubic geometry to four equivalent Si(1) and four equivalent Si(2) atoms. Al(1) is bonded in a body-centered cubic geometry to eight equivalent Er(1) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a body-centered cubic geometry to four equivalent Er(1) and four equivalent Er(2) atoms. In the second Si site, Si(2) is bonded in a body-centered cubic geometry to eight equivalent Er(2) atoms. is represented by the CIF file [CIF]
data_Er4AlSi3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.575
_cell_length_b   3.575
_cell_length_c   13.530
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   172.936
_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
  Er  Er0  1  0.500  0.500  0.130  1.0
  Er  Er1  1  0.500  0.500  0.376  1.0
  Er  Er2  1  0.500  0.500  0.624  1.0
  Er  Er3  1  0.500  0.500  0.870  1.0
  Al  Al4  1  0.000  0.000  0.000  1.0
  Si  Si5  1  0.000  0.000  0.248  1.0
  Si  Si6  1  0.000  0.000  0.500  1.0
  Si  Si7  1  0.000  0.000  0.752  1.0
[/CIF]
.
The structure described by Er4AlSi3 is Heusler-like structured and crystallizes in the tetragonal P4/mmm space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a body-centered cubic geometry to four equivalent Al(1) and four equivalent Si(1) atoms. In the second Er site, Er(2) is bonded in a body-centered cubic geometry to four equivalent Si(1) and four equivalent Si(2) atoms. Al(1) is bonded in a body-centered cubic geometry to eight equivalent Er(1) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a body-centered cubic geometry to four equivalent Er(1) and four equivalent Er(2) atoms. In the second Si site, Si(2) is bonded in a body-centered cubic geometry to eight equivalent Er(2) atoms. is represented by the CIF file [CIF]
data_Er4AlSi3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.575
_cell_length_b   3.575
_cell_length_c   13.530
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   172.936
_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
  Er  Er0  1  0.500  0.500  0.130  1.0
  Er  Er1  1  0.500  0.500  0.376  1.0
  Er  Er2  1  0.500  0.500  0.624  1.0
  Er  Er3  1  0.500  0.500  0.870  1.0
  Al  Al4  1  0.000  0.000  0.000  1.0
  Si  Si5  1  0.000  0.000  0.248  1.0
  Si  Si6  1  0.000  0.000  0.500  1.0
  Si  Si7  1  0.000  0.000  0.752  1.0
[/CIF]
.