The material structure described by Er2GaAl3 is Cubic Laves-derived structured and crystallizes in the trigonal R-3m space group. Er(1) is bonded in a 16-coordinate geometry to four equivalent Er(1), three equivalent Ga(1), and nine equivalent Al(1) atoms. Ga(1) is bonded to six equivalent Er(1) and six equivalent Al(1) atoms to form GaEr6Al6 cuboctahedra that share corners with six equivalent Ga(1)Er6Al6 cuboctahedra, corners with twelve equivalent Al(1)Er6Al4Ga2 cuboctahedra, edges with six equivalent Ga(1)Er6Al6 cuboctahedra, and faces with eighteen equivalent Al(1)Er6Al4Ga2 cuboctahedra. Al(1) is bonded to six equivalent Er(1), two equivalent Ga(1), and four equivalent Al(1) atoms to form AlEr6Al4Ga2 cuboctahedra that share corners with four equivalent Ga(1)Er6Al6 cuboctahedra, corners with fourteen equivalent Al(1)Er6Al4Ga2 cuboctahedra, edges with six equivalent Al(1)Er6Al4Ga2 cuboctahedra, faces with six equivalent Ga(1)Er6Al6 cuboctahedra, and faces with twelve equivalent Al(1)Er6Al4Ga2 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Er2Al3Ga
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.475
_cell_length_b   5.475
_cell_length_c   5.475
_cell_angle_alpha   59.874
_cell_angle_beta   59.874
_cell_angle_gamma   59.874
_symmetry_Int_Tables_number   1
_cell_volume   115.714
_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  0.124  0.124  0.124  1.0
  Er  Er1  1  0.876  0.876  0.876  1.0
  Al  Al2  1  0.500  0.000  0.500  1.0
  Al  Al3  1  0.000  0.500  0.500  1.0
  Al  Al4  1  0.500  0.500  0.000  1.0
  Ga  Ga5  1  0.500  0.500  0.500  1.0
[/CIF]
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The material structure described by Er2GaAl3 is Cubic Laves-derived structured and crystallizes in the trigonal R-3m space group. Er(1) is bonded in a 16-coordinate geometry to four equivalent Er(1), three equivalent Ga(1), and nine equivalent Al(1) atoms. Ga(1) is bonded to six equivalent Er(1) and six equivalent Al(1) atoms to form GaEr6Al6 cuboctahedra that share corners with six equivalent Ga(1)Er6Al6 cuboctahedra, corners with twelve equivalent Al(1)Er6Al4Ga2 cuboctahedra, edges with six equivalent Ga(1)Er6Al6 cuboctahedra, and faces with eighteen equivalent Al(1)Er6Al4Ga2 cuboctahedra. Al(1) is bonded to six equivalent Er(1), two equivalent Ga(1), and four equivalent Al(1) atoms to form AlEr6Al4Ga2 cuboctahedra that share corners with four equivalent Ga(1)Er6Al6 cuboctahedra, corners with fourteen equivalent Al(1)Er6Al4Ga2 cuboctahedra, edges with six equivalent Al(1)Er6Al4Ga2 cuboctahedra, faces with six equivalent Ga(1)Er6Al6 cuboctahedra, and faces with twelve equivalent Al(1)Er6Al4Ga2 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Er2Al3Ga
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.475
_cell_length_b   5.475
_cell_length_c   5.475
_cell_angle_alpha   59.874
_cell_angle_beta   59.874
_cell_angle_gamma   59.874
_symmetry_Int_Tables_number   1
_cell_volume   115.714
_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  0.124  0.124  0.124  1.0
  Er  Er1  1  0.876  0.876  0.876  1.0
  Al  Al2  1  0.500  0.000  0.500  1.0
  Al  Al3  1  0.000  0.500  0.500  1.0
  Al  Al4  1  0.500  0.500  0.000  1.0
  Ga  Ga5  1  0.500  0.500  0.500  1.0
[/CIF]
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