The structure described by Er3(FeGe)4 crystallizes in the orthorhombic Immm space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded to two equivalent Ge(1) and four equivalent Ge(2) atoms to form distorted edge-sharing ErGe6 octahedra. In the second Er site, Er(2) is bonded in a 12-coordinate geometry to six equivalent Fe(1), two equivalent Ge(1), and four equivalent Ge(2) atoms. Fe(1) is bonded in a 8-coordinate geometry to three equivalent Er(2), one Fe(1), one Ge(2), and three equivalent Ge(1) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to one Er(1), two equivalent Er(2), and six equivalent Fe(1) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Er(1), four equivalent Er(2), two equivalent Fe(1), and one Ge(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Er3(FeGe)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.821
_cell_length_b   7.821
_cell_length_c   7.821
_cell_angle_alpha   149.005
_cell_angle_beta   129.174
_cell_angle_gamma   60.733
_symmetry_Int_Tables_number   1
_cell_volume   189.335
_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  0.000  0.500  1.0
  Er  Er1  1  0.871  0.871  0.000  1.0
  Er  Er2  1  0.129  0.129  0.000  1.0
  Fe  Fe3  1  0.855  0.675  0.181  1.0
  Fe  Fe4  1  0.494  0.675  0.819  1.0
  Fe  Fe5  1  0.506  0.325  0.181  1.0
  Fe  Fe6  1  0.145  0.325  0.819  1.0
  Ge  Ge7  1  0.279  0.779  0.500  1.0
  Ge  Ge8  1  0.721  0.221  0.500  1.0
  Ge  Ge9  1  0.196  0.500  0.696  1.0
  Ge  Ge10  1  0.804  0.500  0.304  1.0
[/CIF]
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The structure described by Er3(FeGe)4 crystallizes in the orthorhombic Immm space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded to two equivalent Ge(1) and four equivalent Ge(2) atoms to form distorted edge-sharing ErGe6 octahedra. In the second Er site, Er(2) is bonded in a 12-coordinate geometry to six equivalent Fe(1), two equivalent Ge(1), and four equivalent Ge(2) atoms. Fe(1) is bonded in a 8-coordinate geometry to three equivalent Er(2), one Fe(1), one Ge(2), and three equivalent Ge(1) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to one Er(1), two equivalent Er(2), and six equivalent Fe(1) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Er(1), four equivalent Er(2), two equivalent Fe(1), and one Ge(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Er3(FeGe)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.821
_cell_length_b   7.821
_cell_length_c   7.821
_cell_angle_alpha   149.005
_cell_angle_beta   129.174
_cell_angle_gamma   60.733
_symmetry_Int_Tables_number   1
_cell_volume   189.335
_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  0.000  0.500  1.0
  Er  Er1  1  0.871  0.871  0.000  1.0
  Er  Er2  1  0.129  0.129  0.000  1.0
  Fe  Fe3  1  0.855  0.675  0.181  1.0
  Fe  Fe4  1  0.494  0.675  0.819  1.0
  Fe  Fe5  1  0.506  0.325  0.181  1.0
  Fe  Fe6  1  0.145  0.325  0.819  1.0
  Ge  Ge7  1  0.279  0.779  0.500  1.0
  Ge  Ge8  1  0.721  0.221  0.500  1.0
  Ge  Ge9  1  0.196  0.500  0.696  1.0
  Ge  Ge10  1  0.804  0.500  0.304  1.0
[/CIF]
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