data_Er2InCu2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.61
_cell_length_b   7.61
_cell_length_c   3.59
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Er2InCu2
_chemical_formula_sum   'Er4 In2 Cu4'
_cell_volume   207.92
_cell_formula_units_Z   2
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  0.13  0.33  0.8  1.0
  Er  Er1  1  0.48  0.28  0.8  1.0
  Er  Er2  1  0.33  0.48  0.8  1.0
  Er  Er3  1  0.28  0.13  0.8  1.0
  In  In4  1  0.81  0.81  0.0  1.0
  In  In5  1  0.0  0.0  0.0  1.0
  Cu  Cu6  1  0.9  0.71  0.0  1.0
  Cu  Cu7  1  0.71  0.9  0.0  1.0
  Cu  Cu8  1  0.71  0.71  0.0  1.0
  Cu  Cu9  1  0.9  0.9  0.0  1.0

data_Er2InCu2
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.59
_cell_length_b   7.61
_cell_length_c   7.61
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Er2InCu2
_chemical_formula_sum   'Er4 In2 Cu4'
_cell_volume   207.92
_cell_formula_units_Z   2
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  0.8  0.13  0.33  1.0
  Er  Er1  1  0.8  0.28  0.13  1.0
  Er  Er2  1  0.8  0.33  0.48  1.0
  Er  Er3  1  0.8  0.48  0.28  1.0
  In  In4  1  -0.0  0.81  0.81  1.0
  In  In5  1  0.0  0.0  0.0  1.0
  Cu  Cu6  1  -0.0  0.71  0.9  1.0
  Cu  Cu7  1  -0.0  0.9  0.9  1.0
  Cu  Cu8  1  -0.0  0.71  0.71  1.0
  Cu  Cu9  1  -0.0  0.9  0.71  1.0

Er Er Er Er In In Cu Cu Cu Cu
Er2Cu2In crystallizes in the triclinic P1 space group. There are four inequivalent Er sites. In the first Er site, Er(1) is bonded in a 4-coordinate geometry to one Er(3), one Er(4), one Cu(1), and one In(2) atom. The Er(1)-Er(3) bond length is 1.88 Å. The Er(1)-Er(4) bond length is 1.88 Å. The Er(1)-Cu(1) bond length is 3.46 Å. The Er(1)-In(2) bond length is 2.77 Å. In the second Er site, Er(2) is bonded in a 6-coordinate geometry to one Er(3), one Er(4), two equivalent Er(2), one Cu(2), and one Cu(3) atom. The Er(2)-Er(3) bond length is 1.88 Å. The Er(2)-Er(4) bond length is 1.88 Å. Both Er(2)-Er(2) bond lengths are 3.59 Å. The Er(2)-Cu(2) bond length is 3.46 Å. The Er(2)-Cu(3) bond length is 3.74 Å. In the third Er site, Er(3) is bonded in a 6-coordinate geometry to one Er(1), one Er(2), two equivalent Er(3), one Cu(1), and one Cu(3) atom. Both Er(3)-Er(3) bond lengths are 3.59 Å. The Er(3)-Cu(1) bond length is 3.74 Å. The Er(3)-Cu(3) bond length is 3.46 Å. In the fourth Er site, Er(4) is bonded in a 3-coordinate geometry to one Er(1), one Er(2), and one In(2) atom. The Er(4)-In(2) bond length is 2.49 Å. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a single-bond geometry to one Er(1), one Er(3), and one In(1) atom. The Cu(1)-In(1) bond length is 1.05 Å. In the second Cu site, Cu(2) is bonded in a single-bond geometry to one Er(2) and one In(1) atom. The Cu(2)-In(1) bond length is 1.05 Å. In the third Cu site, Cu(3) is bonded in a single-bond geometry to one Er(2), one Er(3), and one In(1) atom. The Cu(3)-In(1) bond length is 1.05 Å. In the fourth Cu site, Cu(4) is bonded in a linear geometry to one In(1) and one In(2) atom. The Cu(4)-In(1) bond length is 1.05 Å. The Cu(4)-In(2) bond length is 1.05 Å. There are two inequivalent In sites. In the first In site, In(1) is bonded in a square co-planar geometry to one Cu(1), one Cu(2), one Cu(3), and one Cu(4) atom. In the second In site, In(2) is bonded in a distorted single-bond geometry to one Er(1), one Er(4), and one Cu(4) atom.