data_ErIn2Ga
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.18
_cell_length_b   5.18
_cell_length_c   5.18
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   ErIn2Ga
_chemical_formula_sum   'Er1 In2 Ga1'
_cell_volume   98.46
_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  0.67  0.67  0.67  1.0
  In  In2  1  0.83  0.83  0.83  1.0
  In  In3  1  0.5  0.5  0.5  1.0
  Ga  Ga1  1  0.0  0.0  0.0  1.0

data_ErIn2Ga
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.18
_cell_length_b   5.18
_cell_length_c   12.7
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   ErIn2Ga
_chemical_formula_sum   'Er3 In6 Ga3'
_cell_volume   295.39
_cell_formula_units_Z   3
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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  3  0.0  0.0  0.33  1.0
  In  In1  3  0.0  0.0  0.17  1.0
  In  In2  3  0.0  0.0  0.5  1.0
  Ga  Ga3  3  0.0  0.0  0.0  1.0

Er In In Ga
Er In In Ga 0 2 o o o 0 1 o o o 1 3 + + + 
ErIn2Ga crystallizes in the trigonal R3m space group. Er(1) is bonded to one In(1), one In(2), and three equivalent Ga(1) atoms to form distorted ErIn2Ga3 trigonal bipyramids that share corners with six equivalent Er(1)In2Ga3 trigonal bipyramids and  a cornercorner with one Ga(1)Er3In trigonal pyramid. The Er(1)-In(1) bond length is 2.13 Å. The Er(1)-In(2) bond length is 2.13 Å. All Er(1)-Ga(1) bond lengths are 2.99 Å. There are two inequivalent In sites. In the first In site, In(1) is bonded in a 1-coordinate geometry to one Er(1) and one Ga(1) atom. The In(1)-Ga(1) bond length is 2.13 Å. In the second In site, In(2) is bonded in a single-bond geometry to one Er(1) atom. Ga(1) is bonded to three equivalent Er(1) and one In(1) atom to form GaEr3In trigonal pyramids that share  a cornercorner with one Er(1)In2Ga3 trigonal bipyramid and corners with six equivalent Ga(1)Er3In trigonal pyramids.