The structure described by ErGd3Ni4 crystallizes in the orthorhombic Pmm2 space group. Er(1) is bonded in a 7-coordinate geometry to one Ni(1), two equivalent Ni(2), and four equivalent Ni(3) atoms. There are three inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 7-coordinate geometry to one Ni(2), two equivalent Ni(1), and four equivalent Ni(4) atoms. In the second Gd site, Gd(2) is bonded in a 7-coordinate geometry to one Ni(3), two equivalent Ni(4), and four equivalent Ni(1) atoms. In the third Gd site, Gd(3) is bonded in a 7-coordinate geometry to one Ni(4), two equivalent Ni(3), and four equivalent Ni(2) atoms. There are four inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 9-coordinate geometry to one Er(1), two equivalent Gd(1), four equivalent Gd(2), and two equivalent Ni(4) atoms. In the second Ni site, Ni(2) is bonded in a 9-coordinate geometry to two equivalent Er(1), one Gd(1), four equivalent Gd(3), and two equivalent Ni(3) atoms. In the third Ni site, Ni(3) is bonded in a 9-coordinate geometry to four equivalent Er(1), one Gd(2), two equivalent Gd(3), and two equivalent Ni(2) atoms. In the fourth Ni site, Ni(4) is bonded in a 9-coordinate geometry to one Gd(3), two equivalent Gd(2), four equivalent Gd(1), and two equivalent Ni(1) atoms. is represented by the CIF file [CIF]
data_Gd3ErNi4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.726
_cell_length_b   4.201
_cell_length_c   10.183
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   159.376
_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
  Gd  Gd0  1  0.000  0.750  0.861  1.0
  Gd  Gd1  1  0.000  0.250  0.144  1.0
  Gd  Gd2  1  0.500  0.250  0.637  1.0
  Er  Er3  1  0.500  0.750  0.362  1.0
  Ni  Ni4  1  0.500  0.750  0.073  1.0
  Ni  Ni5  1  0.000  0.750  0.565  1.0
  Ni  Ni6  1  0.000  0.250  0.426  1.0
  Ni  Ni7  1  0.500  0.250  0.931  1.0
[/CIF]
.
The structure described by ErGd3Ni4 crystallizes in the orthorhombic Pmm2 space group. Er(1) is bonded in a 7-coordinate geometry to one Ni(1), two equivalent Ni(2), and four equivalent Ni(3) atoms. There are three inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 7-coordinate geometry to one Ni(2), two equivalent Ni(1), and four equivalent Ni(4) atoms. In the second Gd site, Gd(2) is bonded in a 7-coordinate geometry to one Ni(3), two equivalent Ni(4), and four equivalent Ni(1) atoms. In the third Gd site, Gd(3) is bonded in a 7-coordinate geometry to one Ni(4), two equivalent Ni(3), and four equivalent Ni(2) atoms. There are four inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 9-coordinate geometry to one Er(1), two equivalent Gd(1), four equivalent Gd(2), and two equivalent Ni(4) atoms. In the second Ni site, Ni(2) is bonded in a 9-coordinate geometry to two equivalent Er(1), one Gd(1), four equivalent Gd(3), and two equivalent Ni(3) atoms. In the third Ni site, Ni(3) is bonded in a 9-coordinate geometry to four equivalent Er(1), one Gd(2), two equivalent Gd(3), and two equivalent Ni(2) atoms. In the fourth Ni site, Ni(4) is bonded in a 9-coordinate geometry to one Gd(3), two equivalent Gd(2), four equivalent Gd(1), and two equivalent Ni(1) atoms. is represented by the CIF file [CIF]
data_Gd3ErNi4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.726
_cell_length_b   4.201
_cell_length_c   10.183
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   159.376
_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
  Gd  Gd0  1  0.000  0.750  0.861  1.0
  Gd  Gd1  1  0.000  0.250  0.144  1.0
  Gd  Gd2  1  0.500  0.250  0.637  1.0
  Er  Er3  1  0.500  0.750  0.362  1.0
  Ni  Ni4  1  0.500  0.750  0.073  1.0
  Ni  Ni5  1  0.000  0.750  0.565  1.0
  Ni  Ni6  1  0.000  0.250  0.426  1.0
  Ni  Ni7  1  0.500  0.250  0.931  1.0
[/CIF]
.