The structure described by Nd4Ni2Ga17 crystallizes in the orthorhombic Imm2 space group. There are four inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 16-coordinate geometry to two equivalent Ga(10), two equivalent Ga(13), two equivalent Ga(14), two equivalent Ga(9), four equivalent Ga(12), and four equivalent Ga(6) atoms. In the second Nd site, Nd(2) is bonded in a 16-coordinate geometry to two equivalent Ga(13), two equivalent Ga(14), two equivalent Ga(7), two equivalent Ga(8), four equivalent Ga(11), and four equivalent Ga(5) atoms. In the third Nd site, Nd(3) is bonded in a 16-coordinate geometry to two equivalent Ni(2), two equivalent Ga(15), two equivalent Ga(7), two equivalent Ga(8), four equivalent Ga(2), and four equivalent Ga(4) atoms. In the fourth Nd site, Nd(4) is bonded in a 16-coordinate geometry to two equivalent Ga(10), two equivalent Ga(16), two equivalent Ga(17), two equivalent Ga(9), four equivalent Ga(1), and four equivalent Ga(3) atoms. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 6-coordinate geometry to two equivalent Ni(2), two equivalent Ga(15), two equivalent Ga(16), and two equivalent Ga(17) atoms. In the second Ni site, Ni(2) is bonded in a 11-coordinate geometry to two equivalent Nd(3), two equivalent Ni(1), one Ga(16), two equivalent Ga(4), and four equivalent Ga(15) atoms. There are seventeen inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to four equivalent Nd(4), one Ga(3), two equivalent Ga(10), and two equivalent Ga(9) atoms. In the second Ga site, Ga(2) is bonded in a 9-coordinate geometry to four equivalent Nd(3), one Ga(4), two equivalent Ga(7), and two equivalent Ga(8) atoms. In the third Ga site, Ga(3) is bonded in a 9-coordinate geometry to four equivalent Nd(4), one Ga(1), two equivalent Ga(16), and two equivalent Ga(17) atoms. In the fourth Ga site, Ga(4) is bonded in a 9-coordinate geometry to four equivalent Nd(3), two equivalent Ni(2), one Ga(2), and two equivalent Ga(15) atoms. In the fifth Ga site, Ga(5) is bonded in a 9-coordinate geometry to four equivalent Nd(2), one Ga(11), two equivalent Ga(7), and two equivalent Ga(8) atoms. In the sixth Ga site, Ga(6) is bonded in a 9-coordinate geometry to four equivalent Nd(1), one Ga(12), two equivalent Ga(10), and two equivalent Ga(9) atoms. In the seventh Ga site, Ga(7) is bonded to two equivalent Nd(2), two equivalent Nd(3), two equivalent Ga(2), two equivalent Ga(5), and four equivalent Ga(8) atoms to form a mixture of distorted corner, face, and edge-sharing GaNd4Ga8 cuboctahedra. In the eighth Ga site, Ga(8) is bonded to two equivalent Nd(2), two equivalent Nd(3), two equivalent Ga(2), two equivalent Ga(5), and four equivalent Ga(7) atoms to form a mixture of distorted corner, face, and edge-sharing GaNd4Ga8 cuboctahedra. In the ninth Ga site, Ga(9) is bonded to two equivalent Nd(1), two equivalent Nd(4), two equivalent Ga(1), two equivalent Ga(6), and four equivalent Ga(10) atoms to form a mixture of distorted corner, face, and edge-sharing GaNd4Ga8 cuboctahedra. In the tenth Ga site, Ga(10) is bonded to two equivalent Nd(1), two equivalent Nd(4), two equivalent Ga(1), two equivalent Ga(6), and four equivalent Ga(9) atoms to form a mixture of distorted corner, face, and edge-sharing GaNd4Ga8 cuboctahedra. In the eleventh Ga site, Ga(11) is bonded in a 9-coordinate geometry to four equivalent Nd(2), one Ga(5), two equivalent Ga(13), and two equivalent Ga(14) atoms. In the twelfth Ga site, Ga(12) is bonded in a 9-coordinate geometry to four equivalent Nd(1), one Ga(6), two equivalent Ga(13), and two equivalent Ga(14) atoms. In the thirteenth Ga site, Ga(13) is bonded to two equivalent Nd(1), two equivalent Nd(2), two equivalent Ga(11), two equivalent Ga(12), and four equivalent Ga(14) atoms to form a mixture of distorted corner, face, and edge-sharing GaNd4Ga8 cuboctahedra. In the fourteenth Ga site, Ga(14) is bonded to two equivalent Nd(1), two equivalent Nd(2), two equivalent Ga(11), two equivalent Ga(12), and four equivalent Ga(13) atoms to form a mixture of distorted corner, face, and edge-sharing GaNd4Ga8 cuboctahedra. In the fifteenth Ga site, Ga(15) is bonded in a 11-coordinate geometry to two equivalent Nd(3), two equivalent Ni(1), four equivalent Ni(2), one Ga(17), and two equivalent Ga(4) atoms. In the sixteenth Ga site, Ga(16) is bonded in a 3-coordinate geometry to two equivalent Nd(4), one Ni(2), two equivalent Ni(1), and two equivalent Ga(3) atoms. In the seventeenth Ga site, Ga(17) is bonded in a 7-coordinate geometry to two equivalent Nd(4), two equivalent Ni(1), one Ga(15), and two equivalent Ga(3) atoms. is represented by the CIF file [CIF]
data_Nd4Ga17Ni2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   24.079
_cell_length_b   24.079
_cell_length_c   24.079
_cell_angle_alpha   169.769
_cell_angle_beta   169.623
_cell_angle_gamma   14.592
_symmetry_Int_Tables_number   1
_cell_volume   446.673
_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
  Nd  Nd0  1  0.306  0.306  0.000  1.0
  Nd  Nd1  1  0.694  0.694  0.000  1.0
  Nd  Nd2  1  0.078  0.078  0.000  1.0
  Nd  Nd3  1  0.921  0.921  0.000  1.0
  Ga  Ga4  1  0.391  0.391  0.000  1.0
  Ga  Ga5  1  0.608  0.608  0.000  1.0
  Ga  Ga6  1  0.442  0.442  0.000  1.0
  Ga  Ga7  1  0.555  0.555  0.000  1.0
  Ga  Ga8  1  0.169  0.169  0.000  1.0
  Ga  Ga9  1  0.831  0.831  0.000  1.0
  Ga  Ga10  1  0.639  0.139  0.500  1.0
  Ga  Ga11  1  0.139  0.639  0.500  1.0
  Ga  Ga12  1  0.361  0.861  0.500  1.0
  Ga  Ga13  1  0.861  0.361  0.500  1.0
  Ga  Ga14  1  0.221  0.221  0.000  1.0
  Ga  Ga15  1  0.779  0.779  0.000  1.0
  Ga  Ga16  1  0.750  0.250  0.500  1.0
  Ga  Ga17  1  0.250  0.750  0.500  1.0
  Ga  Ga18  1  0.026  0.526  0.500  1.0
  Ga  Ga19  1  0.478  0.978  0.500  1.0
  Ga  Ga20  1  0.973  0.473  0.500  1.0
  Ni  Ni21  1  0.999  0.999  0.000  1.0
  Ni  Ni22  1  0.531  0.031  0.500  1.0
[/CIF]
.
The structure described by Nd4Ni2Ga17 crystallizes in the orthorhombic Imm2 space group. There are four inequivalent Nd sites. In the first Nd site, Nd(1) is bonded in a 16-coordinate geometry to two equivalent Ga(10), two equivalent Ga(13), two equivalent Ga(14), two equivalent Ga(9), four equivalent Ga(12), and four equivalent Ga(6) atoms. In the second Nd site, Nd(2) is bonded in a 16-coordinate geometry to two equivalent Ga(13), two equivalent Ga(14), two equivalent Ga(7), two equivalent Ga(8), four equivalent Ga(11), and four equivalent Ga(5) atoms. In the third Nd site, Nd(3) is bonded in a 16-coordinate geometry to two equivalent Ni(2), two equivalent Ga(15), two equivalent Ga(7), two equivalent Ga(8), four equivalent Ga(2), and four equivalent Ga(4) atoms. In the fourth Nd site, Nd(4) is bonded in a 16-coordinate geometry to two equivalent Ga(10), two equivalent Ga(16), two equivalent Ga(17), two equivalent Ga(9), four equivalent Ga(1), and four equivalent Ga(3) atoms. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 6-coordinate geometry to two equivalent Ni(2), two equivalent Ga(15), two equivalent Ga(16), and two equivalent Ga(17) atoms. In the second Ni site, Ni(2) is bonded in a 11-coordinate geometry to two equivalent Nd(3), two equivalent Ni(1), one Ga(16), two equivalent Ga(4), and four equivalent Ga(15) atoms. There are seventeen inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to four equivalent Nd(4), one Ga(3), two equivalent Ga(10), and two equivalent Ga(9) atoms. In the second Ga site, Ga(2) is bonded in a 9-coordinate geometry to four equivalent Nd(3), one Ga(4), two equivalent Ga(7), and two equivalent Ga(8) atoms. In the third Ga site, Ga(3) is bonded in a 9-coordinate geometry to four equivalent Nd(4), one Ga(1), two equivalent Ga(16), and two equivalent Ga(17) atoms. In the fourth Ga site, Ga(4) is bonded in a 9-coordinate geometry to four equivalent Nd(3), two equivalent Ni(2), one Ga(2), and two equivalent Ga(15) atoms. In the fifth Ga site, Ga(5) is bonded in a 9-coordinate geometry to four equivalent Nd(2), one Ga(11), two equivalent Ga(7), and two equivalent Ga(8) atoms. In the sixth Ga site, Ga(6) is bonded in a 9-coordinate geometry to four equivalent Nd(1), one Ga(12), two equivalent Ga(10), and two equivalent Ga(9) atoms. In the seventh Ga site, Ga(7) is bonded to two equivalent Nd(2), two equivalent Nd(3), two equivalent Ga(2), two equivalent Ga(5), and four equivalent Ga(8) atoms to form a mixture of distorted corner, face, and edge-sharing GaNd4Ga8 cuboctahedra. In the eighth Ga site, Ga(8) is bonded to two equivalent Nd(2), two equivalent Nd(3), two equivalent Ga(2), two equivalent Ga(5), and four equivalent Ga(7) atoms to form a mixture of distorted corner, face, and edge-sharing GaNd4Ga8 cuboctahedra. In the ninth Ga site, Ga(9) is bonded to two equivalent Nd(1), two equivalent Nd(4), two equivalent Ga(1), two equivalent Ga(6), and four equivalent Ga(10) atoms to form a mixture of distorted corner, face, and edge-sharing GaNd4Ga8 cuboctahedra. In the tenth Ga site, Ga(10) is bonded to two equivalent Nd(1), two equivalent Nd(4), two equivalent Ga(1), two equivalent Ga(6), and four equivalent Ga(9) atoms to form a mixture of distorted corner, face, and edge-sharing GaNd4Ga8 cuboctahedra. In the eleventh Ga site, Ga(11) is bonded in a 9-coordinate geometry to four equivalent Nd(2), one Ga(5), two equivalent Ga(13), and two equivalent Ga(14) atoms. In the twelfth Ga site, Ga(12) is bonded in a 9-coordinate geometry to four equivalent Nd(1), one Ga(6), two equivalent Ga(13), and two equivalent Ga(14) atoms. In the thirteenth Ga site, Ga(13) is bonded to two equivalent Nd(1), two equivalent Nd(2), two equivalent Ga(11), two equivalent Ga(12), and four equivalent Ga(14) atoms to form a mixture of distorted corner, face, and edge-sharing GaNd4Ga8 cuboctahedra. In the fourteenth Ga site, Ga(14) is bonded to two equivalent Nd(1), two equivalent Nd(2), two equivalent Ga(11), two equivalent Ga(12), and four equivalent Ga(13) atoms to form a mixture of distorted corner, face, and edge-sharing GaNd4Ga8 cuboctahedra. In the fifteenth Ga site, Ga(15) is bonded in a 11-coordinate geometry to two equivalent Nd(3), two equivalent Ni(1), four equivalent Ni(2), one Ga(17), and two equivalent Ga(4) atoms. In the sixteenth Ga site, Ga(16) is bonded in a 3-coordinate geometry to two equivalent Nd(4), one Ni(2), two equivalent Ni(1), and two equivalent Ga(3) atoms. In the seventeenth Ga site, Ga(17) is bonded in a 7-coordinate geometry to two equivalent Nd(4), two equivalent Ni(1), one Ga(15), and two equivalent Ga(3) atoms. is represented by the CIF file [CIF]
data_Nd4Ga17Ni2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   24.079
_cell_length_b   24.079
_cell_length_c   24.079
_cell_angle_alpha   169.769
_cell_angle_beta   169.623
_cell_angle_gamma   14.592
_symmetry_Int_Tables_number   1
_cell_volume   446.673
_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
  Nd  Nd0  1  0.306  0.306  0.000  1.0
  Nd  Nd1  1  0.694  0.694  0.000  1.0
  Nd  Nd2  1  0.078  0.078  0.000  1.0
  Nd  Nd3  1  0.921  0.921  0.000  1.0
  Ga  Ga4  1  0.391  0.391  0.000  1.0
  Ga  Ga5  1  0.608  0.608  0.000  1.0
  Ga  Ga6  1  0.442  0.442  0.000  1.0
  Ga  Ga7  1  0.555  0.555  0.000  1.0
  Ga  Ga8  1  0.169  0.169  0.000  1.0
  Ga  Ga9  1  0.831  0.831  0.000  1.0
  Ga  Ga10  1  0.639  0.139  0.500  1.0
  Ga  Ga11  1  0.139  0.639  0.500  1.0
  Ga  Ga12  1  0.361  0.861  0.500  1.0
  Ga  Ga13  1  0.861  0.361  0.500  1.0
  Ga  Ga14  1  0.221  0.221  0.000  1.0
  Ga  Ga15  1  0.779  0.779  0.000  1.0
  Ga  Ga16  1  0.750  0.250  0.500  1.0
  Ga  Ga17  1  0.250  0.750  0.500  1.0
  Ga  Ga18  1  0.026  0.526  0.500  1.0
  Ga  Ga19  1  0.478  0.978  0.500  1.0
  Ga  Ga20  1  0.973  0.473  0.500  1.0
  Ni  Ni21  1  0.999  0.999  0.000  1.0
  Ni  Ni22  1  0.531  0.031  0.500  1.0
[/CIF]
.