The crystal structure described by Er4Ni10Ga21 crystallizes in the monoclinic C2/m space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 15-coordinate geometry to two equivalent Ni(2), two equivalent Ni(4), one Ga(1), one Ga(5), one Ga(6), one Ga(8), two equivalent Ga(2), two equivalent Ga(3), and three equivalent Ga(11) atoms. In the second Er site, Er(2) is bonded in a 15-coordinate geometry to two equivalent Ni(3), two equivalent Ni(5), one Ga(3), one Ga(4), one Ga(6), one Ga(8), two equivalent Ga(5), two equivalent Ga(7), and three equivalent Ga(10) atoms. There are five inequivalent Ni sites. In the first Ni site, Ni(5) is bonded in a 10-coordinate geometry to two equivalent Er(2), one Ni(2), one Ga(1), one Ga(5), one Ga(7), two equivalent Ga(4), and two equivalent Ga(6) atoms. In the second Ni site, Ni(1) is bonded in a 9-coordinate geometry to one Ga(6), two equivalent Ga(2), two equivalent Ga(7), two equivalent Ga(8), and two equivalent Ga(9) atoms. In the third Ni site, Ni(2) is bonded in a 10-coordinate geometry to two equivalent Er(1), one Ni(5), one Ga(1), one Ga(2), two equivalent Ga(6), and three equivalent Ga(11) atoms. In the fourth Ni site, Ni(3) is bonded in a 9-coordinate geometry to two equivalent Er(2), one Ga(5), one Ga(8), two equivalent Ga(3), and three equivalent Ga(10) atoms. In the fifth Ni site, Ni(4) is bonded in a 10-coordinate geometry to two equivalent Er(1), one Ga(11), one Ga(3), two equivalent Ga(1), two equivalent Ga(4), and two equivalent Ga(5) atoms. There are eleven inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 10-coordinate geometry to one Er(1), one Ni(2), one Ni(5), two equivalent Ni(4), one Ga(5), two equivalent Ga(11), and two equivalent Ga(4) atoms. In the second Ga site, Ga(2) is bonded in a 5-coordinate geometry to two equivalent Er(1), one Ni(2), two equivalent Ni(1), and one Ga(9) atom. In the third Ga site, Ga(3) is bonded in a 5-coordinate geometry to one Er(2), two equivalent Er(1), one Ni(4), two equivalent Ni(3), one Ga(10), and two equivalent Ga(5) atoms. In the fourth Ga site, Ga(4) is bonded in a 11-coordinate geometry to one Er(2), two equivalent Ni(4), two equivalent Ni(5), one Ga(4), one Ga(6), two equivalent Ga(1), and two equivalent Ga(5) atoms. In the fifth Ga site, Ga(5) is bonded in a 12-coordinate geometry to one Er(1), two equivalent Er(2), one Ni(3), one Ni(5), two equivalent Ni(4), one Ga(1), two equivalent Ga(3), and two equivalent Ga(4) atoms. In the sixth Ga site, Ga(6) is bonded in a 5-coordinate geometry to one Er(1), one Er(2), one Ni(1), two equivalent Ni(2), two equivalent Ni(5), one Ga(11), and one Ga(4) atom. In the seventh Ga site, Ga(7) is bonded in a 5-coordinate geometry to two equivalent Er(2), one Ni(5), two equivalent Ni(1), one Ga(10), and one Ga(9) atom. In the eighth Ga site, Ga(8) is bonded in a 3-coordinate geometry to one Er(1), one Er(2), one Ni(3), two equivalent Ni(1), two equivalent Ga(10), and two equivalent Ga(9) atoms. In the ninth Ga site, Ga(9) is bonded in a 12-coordinate geometry to four equivalent Ni(1), two equivalent Ga(2), two equivalent Ga(7), and four equivalent Ga(8) atoms. In the tenth Ga site, Ga(10) is bonded in a 12-coordinate geometry to three equivalent Er(2), three equivalent Ni(3), one Ga(3), one Ga(7), two equivalent Ga(10), and two equivalent Ga(8) atoms. In the eleventh Ga site, Ga(11) is bonded in a 12-coordinate geometry to three equivalent Er(1), one Ni(4), three equivalent Ni(2), one Ga(6), two equivalent Ga(1), and two equivalent Ga(11) atoms. is represented by the CIF card [CIF]
data_Er4Ga21Ni10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.644
_cell_length_b   10.644
_cell_length_c   15.544
_cell_angle_alpha   55.501
_cell_angle_beta   55.501
_cell_angle_gamma   21.989
_symmetry_Int_Tables_number   1
_cell_volume   538.610
_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  0.771  0.771  0.324  1.0
  Er  Er1  1  0.229  0.229  0.676  1.0
  Er  Er2  1  0.120  0.120  0.167  1.0
  Er  Er3  1  0.880  0.880  0.833  1.0
  Ga  Ga4  1  0.398  0.398  0.497  1.0
  Ga  Ga5  1  0.602  0.602  0.503  1.0
  Ga  Ga6  1  0.386  0.386  0.205  1.0
  Ga  Ga7  1  0.614  0.614  0.795  1.0
  Ga  Ga8  1  0.248  0.248  0.206  1.0
  Ga  Ga9  1  0.752  0.752  0.794  1.0
  Ga  Ga10  1  0.007  0.007  0.409  1.0
  Ga  Ga11  1  0.993  0.993  0.591  1.0
  Ga  Ga12  1  0.627  0.627  0.306  1.0
  Ga  Ga13  1  0.373  0.373  0.694  1.0
  Ga  Ga14  1  0.936  0.936  0.295  1.0
  Ga  Ga15  1  0.064  0.064  0.705  1.0
  Ga  Ga16  1  0.540  0.540  0.132  1.0
  Ga  Ga17  1  0.460  0.460  0.868  1.0
  Ga  Ga18  1  0.882  0.882  0.055  1.0
  Ga  Ga19  1  0.118  0.118  0.945  1.0
  Ga  Ga20  1  0.500  0.500  0.000  1.0
  Ga  Ga21  1  0.298  0.298  0.003  1.0
  Ga  Ga22  1  0.702  0.702  0.997  1.0
  Ga  Ga23  1  0.799  0.799  0.502  1.0
  Ga  Ga24  1  0.201  0.201  0.498  1.0
  Ni  Ni25  1  0.976  0.976  0.106  1.0
  Ni  Ni26  1  0.024  0.024  0.894  1.0
  Ni  Ni27  1  0.347  0.347  0.388  1.0
  Ni  Ni28  1  0.653  0.653  0.612  1.0
  Ni  Ni29  1  0.749  0.749  0.115  1.0
  Ni  Ni30  1  0.251  0.251  0.885  1.0
  Ni  Ni31  1  0.133  0.133  0.398  1.0
  Ni  Ni32  1  0.867  0.867  0.602  1.0
  Ni  Ni33  1  0.503  0.503  0.314  1.0
  Ni  Ni34  1  0.497  0.497  0.686  1.0
[/CIF]
.
The crystal structure described by Er4Ni10Ga21 crystallizes in the monoclinic C2/m space group. There are two inequivalent Er sites. In the first Er site, Er(1) is bonded in a 15-coordinate geometry to two equivalent Ni(2), two equivalent Ni(4), one Ga(1), one Ga(5), one Ga(6), one Ga(8), two equivalent Ga(2), two equivalent Ga(3), and three equivalent Ga(11) atoms. In the second Er site, Er(2) is bonded in a 15-coordinate geometry to two equivalent Ni(3), two equivalent Ni(5), one Ga(3), one Ga(4), one Ga(6), one Ga(8), two equivalent Ga(5), two equivalent Ga(7), and three equivalent Ga(10) atoms. There are five inequivalent Ni sites. In the first Ni site, Ni(5) is bonded in a 10-coordinate geometry to two equivalent Er(2), one Ni(2), one Ga(1), one Ga(5), one Ga(7), two equivalent Ga(4), and two equivalent Ga(6) atoms. In the second Ni site, Ni(1) is bonded in a 9-coordinate geometry to one Ga(6), two equivalent Ga(2), two equivalent Ga(7), two equivalent Ga(8), and two equivalent Ga(9) atoms. In the third Ni site, Ni(2) is bonded in a 10-coordinate geometry to two equivalent Er(1), one Ni(5), one Ga(1), one Ga(2), two equivalent Ga(6), and three equivalent Ga(11) atoms. In the fourth Ni site, Ni(3) is bonded in a 9-coordinate geometry to two equivalent Er(2), one Ga(5), one Ga(8), two equivalent Ga(3), and three equivalent Ga(10) atoms. In the fifth Ni site, Ni(4) is bonded in a 10-coordinate geometry to two equivalent Er(1), one Ga(11), one Ga(3), two equivalent Ga(1), two equivalent Ga(4), and two equivalent Ga(5) atoms. There are eleven inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 10-coordinate geometry to one Er(1), one Ni(2), one Ni(5), two equivalent Ni(4), one Ga(5), two equivalent Ga(11), and two equivalent Ga(4) atoms. In the second Ga site, Ga(2) is bonded in a 5-coordinate geometry to two equivalent Er(1), one Ni(2), two equivalent Ni(1), and one Ga(9) atom. In the third Ga site, Ga(3) is bonded in a 5-coordinate geometry to one Er(2), two equivalent Er(1), one Ni(4), two equivalent Ni(3), one Ga(10), and two equivalent Ga(5) atoms. In the fourth Ga site, Ga(4) is bonded in a 11-coordinate geometry to one Er(2), two equivalent Ni(4), two equivalent Ni(5), one Ga(4), one Ga(6), two equivalent Ga(1), and two equivalent Ga(5) atoms. In the fifth Ga site, Ga(5) is bonded in a 12-coordinate geometry to one Er(1), two equivalent Er(2), one Ni(3), one Ni(5), two equivalent Ni(4), one Ga(1), two equivalent Ga(3), and two equivalent Ga(4) atoms. In the sixth Ga site, Ga(6) is bonded in a 5-coordinate geometry to one Er(1), one Er(2), one Ni(1), two equivalent Ni(2), two equivalent Ni(5), one Ga(11), and one Ga(4) atom. In the seventh Ga site, Ga(7) is bonded in a 5-coordinate geometry to two equivalent Er(2), one Ni(5), two equivalent Ni(1), one Ga(10), and one Ga(9) atom. In the eighth Ga site, Ga(8) is bonded in a 3-coordinate geometry to one Er(1), one Er(2), one Ni(3), two equivalent Ni(1), two equivalent Ga(10), and two equivalent Ga(9) atoms. In the ninth Ga site, Ga(9) is bonded in a 12-coordinate geometry to four equivalent Ni(1), two equivalent Ga(2), two equivalent Ga(7), and four equivalent Ga(8) atoms. In the tenth Ga site, Ga(10) is bonded in a 12-coordinate geometry to three equivalent Er(2), three equivalent Ni(3), one Ga(3), one Ga(7), two equivalent Ga(10), and two equivalent Ga(8) atoms. In the eleventh Ga site, Ga(11) is bonded in a 12-coordinate geometry to three equivalent Er(1), one Ni(4), three equivalent Ni(2), one Ga(6), two equivalent Ga(1), and two equivalent Ga(11) atoms. is represented by the CIF card [CIF]
data_Er4Ga21Ni10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.644
_cell_length_b   10.644
_cell_length_c   15.544
_cell_angle_alpha   55.501
_cell_angle_beta   55.501
_cell_angle_gamma   21.989
_symmetry_Int_Tables_number   1
_cell_volume   538.610
_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  0.771  0.771  0.324  1.0
  Er  Er1  1  0.229  0.229  0.676  1.0
  Er  Er2  1  0.120  0.120  0.167  1.0
  Er  Er3  1  0.880  0.880  0.833  1.0
  Ga  Ga4  1  0.398  0.398  0.497  1.0
  Ga  Ga5  1  0.602  0.602  0.503  1.0
  Ga  Ga6  1  0.386  0.386  0.205  1.0
  Ga  Ga7  1  0.614  0.614  0.795  1.0
  Ga  Ga8  1  0.248  0.248  0.206  1.0
  Ga  Ga9  1  0.752  0.752  0.794  1.0
  Ga  Ga10  1  0.007  0.007  0.409  1.0
  Ga  Ga11  1  0.993  0.993  0.591  1.0
  Ga  Ga12  1  0.627  0.627  0.306  1.0
  Ga  Ga13  1  0.373  0.373  0.694  1.0
  Ga  Ga14  1  0.936  0.936  0.295  1.0
  Ga  Ga15  1  0.064  0.064  0.705  1.0
  Ga  Ga16  1  0.540  0.540  0.132  1.0
  Ga  Ga17  1  0.460  0.460  0.868  1.0
  Ga  Ga18  1  0.882  0.882  0.055  1.0
  Ga  Ga19  1  0.118  0.118  0.945  1.0
  Ga  Ga20  1  0.500  0.500  0.000  1.0
  Ga  Ga21  1  0.298  0.298  0.003  1.0
  Ga  Ga22  1  0.702  0.702  0.997  1.0
  Ga  Ga23  1  0.799  0.799  0.502  1.0
  Ga  Ga24  1  0.201  0.201  0.498  1.0
  Ni  Ni25  1  0.976  0.976  0.106  1.0
  Ni  Ni26  1  0.024  0.024  0.894  1.0
  Ni  Ni27  1  0.347  0.347  0.388  1.0
  Ni  Ni28  1  0.653  0.653  0.612  1.0
  Ni  Ni29  1  0.749  0.749  0.115  1.0
  Ni  Ni30  1  0.251  0.251  0.885  1.0
  Ni  Ni31  1  0.133  0.133  0.398  1.0
  Ni  Ni32  1  0.867  0.867  0.602  1.0
  Ni  Ni33  1  0.503  0.503  0.314  1.0
  Ni  Ni34  1  0.497  0.497  0.686  1.0
[/CIF]
.