The structure described by Er2Cu11Ga6 crystallizes in the trigonal R-3m space group. Er(1) is bonded in a 19-coordinate geometry to one Cu(1), three equivalent Cu(2), six equivalent Cu(3), and nine equivalent Ga(1) atoms. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 14-coordinate geometry to one Er(1), one Cu(1), three equivalent Cu(2), six equivalent Cu(3), and three equivalent Ga(1) atoms. In the second Cu site, Cu(2) is bonded to two equivalent Er(1), two equivalent Cu(1), four equivalent Cu(3), and four equivalent Ga(1) atoms to form distorted CuEr2Ga4Cu6 cuboctahedra that share corners with four equivalent Cu(2)Er2Ga4Cu6 cuboctahedra, corners with ten equivalent Ga(1)Er3Ga2Cu7 cuboctahedra, edges with six equivalent Ga(1)Er3Ga2Cu7 cuboctahedra, faces with four equivalent Cu(2)Er2Ga4Cu6 cuboctahedra, and faces with six equivalent Ga(1)Er3Ga2Cu7 cuboctahedra. In the third Cu site, Cu(3) is bonded in a 12-coordinate geometry to two equivalent Er(1), two equivalent Cu(1), two equivalent Cu(2), two equivalent Cu(3), and four equivalent Ga(1) atoms. Ga(1) is bonded to three equivalent Er(1), one Cu(1), two equivalent Cu(2), four equivalent Cu(3), and two equivalent Ga(1) atoms to form distorted GaEr3Ga2Cu7 cuboctahedra that share corners with five equivalent Cu(2)Er2Ga4Cu6 cuboctahedra, corners with ten equivalent Ga(1)Er3Ga2Cu7 cuboctahedra, edges with three equivalent Cu(2)Er2Ga4Cu6 cuboctahedra, edges with five equivalent Ga(1)Er3Ga2Cu7 cuboctahedra, faces with three equivalent Cu(2)Er2Ga4Cu6 cuboctahedra, and faces with seven equivalent Ga(1)Er3Ga2Cu7 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Er2Ga6Cu11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.561
_cell_length_b   6.561
_cell_length_c   6.561
_cell_angle_alpha   83.570
_cell_angle_beta   83.570
_cell_angle_gamma   83.570
_symmetry_Int_Tables_number   1
_cell_volume   277.426
_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  0.661  0.661  0.661  1.0
  Er  Er1  1  0.339  0.339  0.339  1.0
  Ga  Ga2  1  0.344  0.854  0.344  1.0
  Ga  Ga3  1  0.344  0.344  0.854  1.0
  Ga  Ga4  1  0.854  0.344  0.344  1.0
  Ga  Ga5  1  0.656  0.146  0.656  1.0
  Ga  Ga6  1  0.656  0.656  0.146  1.0
  Ga  Ga7  1  0.146  0.656  0.656  1.0
  Cu  Cu8  1  0.900  0.900  0.900  1.0
  Cu  Cu9  1  0.100  0.100  0.100  1.0
  Cu  Cu10  1  0.000  0.000  0.500  1.0
  Cu  Cu11  1  0.500  0.000  0.000  1.0
  Cu  Cu12  1  0.000  0.500  0.000  1.0
  Cu  Cu13  1  0.704  0.296  0.000  1.0
  Cu  Cu14  1  0.000  0.704  0.296  1.0
  Cu  Cu15  1  0.296  0.000  0.704  1.0
  Cu  Cu16  1  0.000  0.296  0.704  1.0
  Cu  Cu17  1  0.704  0.000  0.296  1.0
  Cu  Cu18  1  0.296  0.704  0.000  1.0
[/CIF]
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The structure described by Er2Cu11Ga6 crystallizes in the trigonal R-3m space group. Er(1) is bonded in a 19-coordinate geometry to one Cu(1), three equivalent Cu(2), six equivalent Cu(3), and nine equivalent Ga(1) atoms. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 14-coordinate geometry to one Er(1), one Cu(1), three equivalent Cu(2), six equivalent Cu(3), and three equivalent Ga(1) atoms. In the second Cu site, Cu(2) is bonded to two equivalent Er(1), two equivalent Cu(1), four equivalent Cu(3), and four equivalent Ga(1) atoms to form distorted CuEr2Ga4Cu6 cuboctahedra that share corners with four equivalent Cu(2)Er2Ga4Cu6 cuboctahedra, corners with ten equivalent Ga(1)Er3Ga2Cu7 cuboctahedra, edges with six equivalent Ga(1)Er3Ga2Cu7 cuboctahedra, faces with four equivalent Cu(2)Er2Ga4Cu6 cuboctahedra, and faces with six equivalent Ga(1)Er3Ga2Cu7 cuboctahedra. In the third Cu site, Cu(3) is bonded in a 12-coordinate geometry to two equivalent Er(1), two equivalent Cu(1), two equivalent Cu(2), two equivalent Cu(3), and four equivalent Ga(1) atoms. Ga(1) is bonded to three equivalent Er(1), one Cu(1), two equivalent Cu(2), four equivalent Cu(3), and two equivalent Ga(1) atoms to form distorted GaEr3Ga2Cu7 cuboctahedra that share corners with five equivalent Cu(2)Er2Ga4Cu6 cuboctahedra, corners with ten equivalent Ga(1)Er3Ga2Cu7 cuboctahedra, edges with three equivalent Cu(2)Er2Ga4Cu6 cuboctahedra, edges with five equivalent Ga(1)Er3Ga2Cu7 cuboctahedra, faces with three equivalent Cu(2)Er2Ga4Cu6 cuboctahedra, and faces with seven equivalent Ga(1)Er3Ga2Cu7 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Er2Ga6Cu11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.561
_cell_length_b   6.561
_cell_length_c   6.561
_cell_angle_alpha   83.570
_cell_angle_beta   83.570
_cell_angle_gamma   83.570
_symmetry_Int_Tables_number   1
_cell_volume   277.426
_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  0.661  0.661  0.661  1.0
  Er  Er1  1  0.339  0.339  0.339  1.0
  Ga  Ga2  1  0.344  0.854  0.344  1.0
  Ga  Ga3  1  0.344  0.344  0.854  1.0
  Ga  Ga4  1  0.854  0.344  0.344  1.0
  Ga  Ga5  1  0.656  0.146  0.656  1.0
  Ga  Ga6  1  0.656  0.656  0.146  1.0
  Ga  Ga7  1  0.146  0.656  0.656  1.0
  Cu  Cu8  1  0.900  0.900  0.900  1.0
  Cu  Cu9  1  0.100  0.100  0.100  1.0
  Cu  Cu10  1  0.000  0.000  0.500  1.0
  Cu  Cu11  1  0.500  0.000  0.000  1.0
  Cu  Cu12  1  0.000  0.500  0.000  1.0
  Cu  Cu13  1  0.704  0.296  0.000  1.0
  Cu  Cu14  1  0.000  0.704  0.296  1.0
  Cu  Cu15  1  0.296  0.000  0.704  1.0
  Cu  Cu16  1  0.000  0.296  0.704  1.0
  Cu  Cu17  1  0.704  0.000  0.296  1.0
  Cu  Cu18  1  0.296  0.704  0.000  1.0
[/CIF]
.