The material structure described by Er2Fe2Si2C crystallizes in the monoclinic C2/m space group. Er(1) is bonded in a 2-coordinate geometry to five equivalent Si(1) and two equivalent C(1) atoms. Fe(1) is bonded in a distorted single-bond geometry to three equivalent Si(1) and one C(1) atom. Si(1) is bonded in a 9-coordinate geometry to five equivalent Er(1), three equivalent Fe(1), and one Si(1) atom. C(1) is bonded to four equivalent Er(1) and two equivalent Fe(1) atoms to form distorted edge-sharing CEr4Fe2 octahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Er2Fe2Si2C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.570
_cell_length_b   5.570
_cell_length_c   6.644
_cell_angle_alpha   53.348
_cell_angle_beta   53.348
_cell_angle_gamma   40.741
_symmetry_Int_Tables_number   1
_cell_volume   103.746
_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  0.442  0.442  0.292  1.0
  Er  Er1  1  0.558  0.558  0.708  1.0
  Fe  Fe2  1  0.798  0.798  0.097  1.0
  Fe  Fe3  1  0.202  0.202  0.903  1.0
  Si  Si4  1  0.839  0.839  0.715  1.0
  Si  Si5  1  0.161  0.161  0.285  1.0
  C  C6  1  0.000  0.000  0.000  1.0
[/CIF]
.
The material structure described by Er2Fe2Si2C crystallizes in the monoclinic C2/m space group. Er(1) is bonded in a 2-coordinate geometry to five equivalent Si(1) and two equivalent C(1) atoms. Fe(1) is bonded in a distorted single-bond geometry to three equivalent Si(1) and one C(1) atom. Si(1) is bonded in a 9-coordinate geometry to five equivalent Er(1), three equivalent Fe(1), and one Si(1) atom. C(1) is bonded to four equivalent Er(1) and two equivalent Fe(1) atoms to form distorted edge-sharing CEr4Fe2 octahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Er2Fe2Si2C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.570
_cell_length_b   5.570
_cell_length_c   6.644
_cell_angle_alpha   53.348
_cell_angle_beta   53.348
_cell_angle_gamma   40.741
_symmetry_Int_Tables_number   1
_cell_volume   103.746
_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  0.442  0.442  0.292  1.0
  Er  Er1  1  0.558  0.558  0.708  1.0
  Fe  Fe2  1  0.798  0.798  0.097  1.0
  Fe  Fe3  1  0.202  0.202  0.903  1.0
  Si  Si4  1  0.839  0.839  0.715  1.0
  Si  Si5  1  0.161  0.161  0.285  1.0
  C  C6  1  0.000  0.000  0.000  1.0
[/CIF]
.