The material structure described by ErNiGa4 crystallizes in the orthorhombic Cmcm space group. Er(1) is bonded in a 15-coordinate geometry to two equivalent Ni(1), three equivalent Ga(2), four equivalent Ga(1), and six equivalent Ga(3) atoms. Ni(1) is bonded in a 9-coordinate geometry to two equivalent Er(1), one Ga(2), and six equivalent Ga(3) atoms. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a distorted q6 geometry to four equivalent Er(1), two equivalent Ga(3), and four equivalent Ga(2) atoms. In the second Ga site, Ga(2) is bonded in a distorted linear geometry to three equivalent Er(1), one Ni(1), four equivalent Ga(1), and four equivalent Ga(3) atoms. In the third Ga site, Ga(3) is bonded in a 12-coordinate geometry to three equivalent Er(1), three equivalent Ni(1), one Ga(1), two equivalent Ga(2), and three equivalent Ga(3) atoms. is represented by the CIF file [CIF]
data_ErGa4Ni
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.778
_cell_length_b   7.778
_cell_length_c   6.510
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   149.820
_symmetry_Int_Tables_number   1
_cell_volume   197.991
_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  0.880  0.120  0.750  1.0
  Er  Er1  1  0.120  0.880  0.250  1.0
  Ga  Ga2  1  0.500  0.500  0.000  1.0
  Ga  Ga3  1  0.500  0.500  0.500  1.0
  Ga  Ga4  1  0.070  0.930  0.750  1.0
  Ga  Ga5  1  0.930  0.070  0.250  1.0
  Ga  Ga6  1  0.685  0.315  0.949  1.0
  Ga  Ga7  1  0.315  0.685  0.051  1.0
  Ga  Ga8  1  0.685  0.315  0.551  1.0
  Ga  Ga9  1  0.315  0.685  0.449  1.0
  Ni  Ni10  1  0.224  0.776  0.750  1.0
  Ni  Ni11  1  0.776  0.224  0.250  1.0
[/CIF]
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The material structure described by ErNiGa4 crystallizes in the orthorhombic Cmcm space group. Er(1) is bonded in a 15-coordinate geometry to two equivalent Ni(1), three equivalent Ga(2), four equivalent Ga(1), and six equivalent Ga(3) atoms. Ni(1) is bonded in a 9-coordinate geometry to two equivalent Er(1), one Ga(2), and six equivalent Ga(3) atoms. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a distorted q6 geometry to four equivalent Er(1), two equivalent Ga(3), and four equivalent Ga(2) atoms. In the second Ga site, Ga(2) is bonded in a distorted linear geometry to three equivalent Er(1), one Ni(1), four equivalent Ga(1), and four equivalent Ga(3) atoms. In the third Ga site, Ga(3) is bonded in a 12-coordinate geometry to three equivalent Er(1), three equivalent Ni(1), one Ga(1), two equivalent Ga(2), and three equivalent Ga(3) atoms. is represented by the CIF file [CIF]
data_ErGa4Ni
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.778
_cell_length_b   7.778
_cell_length_c   6.510
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   149.820
_symmetry_Int_Tables_number   1
_cell_volume   197.991
_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  0.880  0.120  0.750  1.0
  Er  Er1  1  0.120  0.880  0.250  1.0
  Ga  Ga2  1  0.500  0.500  0.000  1.0
  Ga  Ga3  1  0.500  0.500  0.500  1.0
  Ga  Ga4  1  0.070  0.930  0.750  1.0
  Ga  Ga5  1  0.930  0.070  0.250  1.0
  Ga  Ga6  1  0.685  0.315  0.949  1.0
  Ga  Ga7  1  0.315  0.685  0.051  1.0
  Ga  Ga8  1  0.685  0.315  0.551  1.0
  Ga  Ga9  1  0.315  0.685  0.449  1.0
  Ni  Ni10  1  0.224  0.776  0.750  1.0
  Ni  Ni11  1  0.776  0.224  0.250  1.0
[/CIF]
.