The compound described by La7Ni16 is Bergman Structure: Mg32(Al,Zn)49 Bergman-derived structured and crystallizes in the tetragonal I-42m space group. There are three inequivalent La sites. In the first La site, La(1) is bonded in a 6-coordinate geometry to three equivalent Ni(1), three equivalent Ni(3), and six equivalent Ni(2) atoms. In the second La site, La(2) is bonded in a 12-coordinate geometry to four equivalent Ni(1), four equivalent Ni(2), and four equivalent Ni(3) atoms. In the third La site, La(3) is bonded in a 12-coordinate geometry to four equivalent Ni(1) and eight equivalent Ni(2) atoms. There are three inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 12-coordinate geometry to one La(3), two equivalent La(2), three equivalent La(1), one Ni(1), two equivalent Ni(2), and three equivalent Ni(3) atoms. In the second Ni site, Ni(2) is bonded in a 11-coordinate geometry to one La(2), one La(3), three equivalent La(1), one Ni(1), one Ni(3), and four equivalent Ni(2) atoms. In the third Ni site, Ni(3) is bonded in a 11-coordinate geometry to two equivalent La(2), three equivalent La(1), one Ni(3), two equivalent Ni(2), and three equivalent Ni(1) atoms. is represented by the CIF file [CIF]
data_La7Ni16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.266
_cell_length_b   7.266
_cell_length_c   8.828
_cell_angle_alpha   114.306
_cell_angle_beta   114.306
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   379.025
_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
  La  La0  1  0.593  0.201  0.794  1.0
  La  La1  1  0.201  0.593  0.794  1.0
  La  La2  1  0.407  0.407  0.206  1.0
  La  La3  1  0.250  0.750  0.500  1.0
  La  La4  1  0.000  0.000  1.000  1.0
  La  La5  1  0.799  0.799  0.206  1.0
  La  La6  1  0.750  0.250  0.500  1.0
  Ni  Ni7  1  0.933  0.933  0.630  1.0
  Ni  Ni8  1  0.182  0.697  0.131  1.0
  Ni  Ni9  1  0.434  0.948  0.131  1.0
  Ni  Ni10  1  0.697  0.697  0.630  1.0
  Ni  Ni11  1  0.817  0.566  0.869  1.0
  Ni  Ni12  1  0.439  0.439  0.602  1.0
  Ni  Ni13  1  0.303  0.067  0.370  1.0
  Ni  Ni14  1  0.566  0.817  0.869  1.0
  Ni  Ni15  1  0.561  0.837  0.397  1.0
  Ni  Ni16  1  0.163  0.163  0.603  1.0
  Ni  Ni17  1  0.067  0.303  0.370  1.0
  Ni  Ni18  1  0.303  0.052  0.869  1.0
  Ni  Ni19  1  0.052  0.303  0.869  1.0
  Ni  Ni20  1  0.697  0.182  0.131  1.0
  Ni  Ni21  1  0.837  0.561  0.397  1.0
  Ni  Ni22  1  0.948  0.434  0.131  1.0
[/CIF]
.
The compound described by La7Ni16 is Bergman Structure: Mg32(Al,Zn)49 Bergman-derived structured and crystallizes in the tetragonal I-42m space group. There are three inequivalent La sites. In the first La site, La(1) is bonded in a 6-coordinate geometry to three equivalent Ni(1), three equivalent Ni(3), and six equivalent Ni(2) atoms. In the second La site, La(2) is bonded in a 12-coordinate geometry to four equivalent Ni(1), four equivalent Ni(2), and four equivalent Ni(3) atoms. In the third La site, La(3) is bonded in a 12-coordinate geometry to four equivalent Ni(1) and eight equivalent Ni(2) atoms. There are three inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 12-coordinate geometry to one La(3), two equivalent La(2), three equivalent La(1), one Ni(1), two equivalent Ni(2), and three equivalent Ni(3) atoms. In the second Ni site, Ni(2) is bonded in a 11-coordinate geometry to one La(2), one La(3), three equivalent La(1), one Ni(1), one Ni(3), and four equivalent Ni(2) atoms. In the third Ni site, Ni(3) is bonded in a 11-coordinate geometry to two equivalent La(2), three equivalent La(1), one Ni(3), two equivalent Ni(2), and three equivalent Ni(1) atoms. is represented by the CIF file [CIF]
data_La7Ni16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.266
_cell_length_b   7.266
_cell_length_c   8.828
_cell_angle_alpha   114.306
_cell_angle_beta   114.306
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   379.025
_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
  La  La0  1  0.593  0.201  0.794  1.0
  La  La1  1  0.201  0.593  0.794  1.0
  La  La2  1  0.407  0.407  0.206  1.0
  La  La3  1  0.250  0.750  0.500  1.0
  La  La4  1  0.000  0.000  1.000  1.0
  La  La5  1  0.799  0.799  0.206  1.0
  La  La6  1  0.750  0.250  0.500  1.0
  Ni  Ni7  1  0.933  0.933  0.630  1.0
  Ni  Ni8  1  0.182  0.697  0.131  1.0
  Ni  Ni9  1  0.434  0.948  0.131  1.0
  Ni  Ni10  1  0.697  0.697  0.630  1.0
  Ni  Ni11  1  0.817  0.566  0.869  1.0
  Ni  Ni12  1  0.439  0.439  0.602  1.0
  Ni  Ni13  1  0.303  0.067  0.370  1.0
  Ni  Ni14  1  0.566  0.817  0.869  1.0
  Ni  Ni15  1  0.561  0.837  0.397  1.0
  Ni  Ni16  1  0.163  0.163  0.603  1.0
  Ni  Ni17  1  0.067  0.303  0.370  1.0
  Ni  Ni18  1  0.303  0.052  0.869  1.0
  Ni  Ni19  1  0.052  0.303  0.869  1.0
  Ni  Ni20  1  0.697  0.182  0.131  1.0
  Ni  Ni21  1  0.837  0.561  0.397  1.0
  Ni  Ni22  1  0.948  0.434  0.131  1.0
[/CIF]
.