The structure described by U3Ni5Al19 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 15-coordinate geometry to two equivalent Ni(1), one Al(10), two equivalent Al(3), two equivalent Al(7), four equivalent Al(2), and four equivalent Al(9) atoms. In the second U site, U(2) is bonded in a 15-coordinate geometry to two equivalent Ni(2), one Al(10), one Al(5), one Al(7), one Al(8), one Al(9), two equivalent Al(2), two equivalent Al(3), two equivalent Al(4), and two equivalent Al(6) atoms. There are three inequivalent Ni sites. In the first Ni site, Ni(2) is bonded in a 8-coordinate geometry to two equivalent U(2), one Al(1), one Al(4), one Al(6), two equivalent Al(8), and three equivalent Al(5) atoms. In the second Ni site, Ni(1) is bonded in a 7-coordinate geometry to two equivalent U(1), one Al(10), two equivalent Al(9), and four equivalent Al(3) atoms. In the third Ni site, Ni(3) is bonded in a 9-coordinate geometry to one Al(4), one Al(8), one Al(9), two equivalent Al(1), two equivalent Al(6), and two equivalent Al(7) atoms. There are ten inequivalent Al sites. In the first Al site, Al(6) is bonded in a 3-coordinate geometry to two equivalent U(2), one Ni(2), two equivalent Ni(3), and one Al(7) atom. In the second Al site, Al(7) is bonded to one U(1), one U(2), two equivalent Ni(3), one Al(1), one Al(6), two equivalent Al(2), two equivalent Al(4), and two equivalent Al(9) atoms to form a mixture of distorted face and corner-sharing AlU2Al8Ni2 cuboctahedra. In the third Al site, Al(8) is bonded in a distorted trigonal non-coplanar geometry to one U(2), one Ni(3), and two equivalent Ni(2) atoms. In the fourth Al site, Al(1) is bonded in a distorted trigonal planar geometry to one Ni(2), two equivalent Ni(3), and one Al(7) atom. In the fifth Al site, Al(9) is bonded in a distorted bent 150 degrees geometry to one U(2), two equivalent U(1), one Ni(1), one Ni(3), one Al(2), and two equivalent Al(7) atoms. In the sixth Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent U(1), two equivalent U(2), one Al(2), one Al(3), one Al(4), one Al(9), two equivalent Al(10), and two equivalent Al(7) atoms. In the seventh Al site, Al(10) is bonded in a distorted single-bond geometry to one U(1), two equivalent U(2), one Ni(1), and four equivalent Al(2) atoms. In the eighth Al site, Al(3) is bonded in a 2-coordinate geometry to one U(1), two equivalent U(2), two equivalent Ni(1), and one Al(2) atom. In the ninth Al site, Al(4) is bonded in a distorted bent 150 degrees geometry to two equivalent U(2), one Ni(2), one Ni(3), one Al(2), and two equivalent Al(7) atoms. In the tenth Al site, Al(5) is bonded in a 3-coordinate geometry to one U(2) and three equivalent Ni(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_U3Al19Ni5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.186
_cell_length_b   8.186
_cell_length_c   26.862
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   151.219
_symmetry_Int_Tables_number   1
_cell_volume   866.760
_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
  U  U0  1  0.884  0.116  0.250  1.0
  U  U1  1  0.116  0.884  0.750  1.0
  U  U2  1  0.668  0.332  0.136  1.0
  U  U3  1  0.332  0.668  0.864  1.0
  U  U4  1  0.668  0.332  0.364  1.0
  U  U5  1  0.332  0.668  0.636  1.0
  Al  Al6  1  0.907  0.093  0.463  1.0
  Al  Al7  1  0.093  0.907  0.537  1.0
  Al  Al8  1  0.907  0.093  0.037  1.0
  Al  Al9  1  0.093  0.907  0.963  1.0
  Al  Al10  1  0.276  0.724  0.194  1.0
  Al  Al11  1  0.724  0.276  0.806  1.0
  Al  Al12  1  0.276  0.724  0.306  1.0
  Al  Al13  1  0.724  0.276  0.694  1.0
  Al  Al14  1  0.922  0.078  0.799  1.0
  Al  Al15  1  0.078  0.922  0.201  1.0
  Al  Al16  1  0.922  0.078  0.701  1.0
  Al  Al17  1  0.078  0.922  0.299  1.0
  Al  Al18  1  0.708  0.292  0.911  1.0
  Al  Al19  1  0.292  0.708  0.089  1.0
  Al  Al20  1  0.708  0.292  0.589  1.0
  Al  Al21  1  0.292  0.708  0.411  1.0
  Al  Al22  1  0.736  0.264  0.029  1.0
  Al  Al23  1  0.264  0.736  0.971  1.0
  Al  Al24  1  0.736  0.264  0.471  1.0
  Al  Al25  1  0.264  0.736  0.529  1.0
  Al  Al26  1  0.963  0.037  0.898  1.0
  Al  Al27  1  0.037  0.963  0.102  1.0
  Al  Al28  1  0.963  0.037  0.602  1.0
  Al  Al29  1  0.037  0.963  0.398  1.0
  Al  Al30  1  0.868  0.132  0.364  1.0
  Al  Al31  1  0.132  0.868  0.636  1.0
  Al  Al32  1  0.868  0.132  0.136  1.0
  Al  Al33  1  0.132  0.868  0.864  1.0
  Al  Al34  1  0.432  0.568  0.969  1.0
  Al  Al35  1  0.568  0.432  0.031  1.0
  Al  Al36  1  0.432  0.568  0.531  1.0
  Al  Al37  1  0.568  0.432  0.469  1.0
  Al  Al38  1  0.463  0.537  0.174  1.0
  Al  Al39  1  0.537  0.463  0.826  1.0
  Al  Al40  1  0.463  0.537  0.326  1.0
  Al  Al41  1  0.537  0.463  0.674  1.0
  Al  Al42  1  0.695  0.305  0.250  1.0
  Al  Al43  1  0.305  0.695  0.750  1.0
  Ni  Ni44  1  0.544  0.456  0.250  1.0
  Ni  Ni45  1  0.456  0.544  0.750  1.0
  Ni  Ni46  1  0.840  0.160  0.957  1.0
  Ni  Ni47  1  0.160  0.840  0.043  1.0
  Ni  Ni48  1  0.840  0.160  0.543  1.0
  Ni  Ni49  1  0.160  0.840  0.457  1.0
  Ni  Ni50  1  0.553  0.447  0.916  1.0
  Ni  Ni51  1  0.447  0.553  0.084  1.0
  Ni  Ni52  1  0.553  0.447  0.584  1.0
  Ni  Ni53  1  0.447  0.553  0.416  1.0
[/CIF]
.
The structure described by U3Ni5Al19 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 15-coordinate geometry to two equivalent Ni(1), one Al(10), two equivalent Al(3), two equivalent Al(7), four equivalent Al(2), and four equivalent Al(9) atoms. In the second U site, U(2) is bonded in a 15-coordinate geometry to two equivalent Ni(2), one Al(10), one Al(5), one Al(7), one Al(8), one Al(9), two equivalent Al(2), two equivalent Al(3), two equivalent Al(4), and two equivalent Al(6) atoms. There are three inequivalent Ni sites. In the first Ni site, Ni(2) is bonded in a 8-coordinate geometry to two equivalent U(2), one Al(1), one Al(4), one Al(6), two equivalent Al(8), and three equivalent Al(5) atoms. In the second Ni site, Ni(1) is bonded in a 7-coordinate geometry to two equivalent U(1), one Al(10), two equivalent Al(9), and four equivalent Al(3) atoms. In the third Ni site, Ni(3) is bonded in a 9-coordinate geometry to one Al(4), one Al(8), one Al(9), two equivalent Al(1), two equivalent Al(6), and two equivalent Al(7) atoms. There are ten inequivalent Al sites. In the first Al site, Al(6) is bonded in a 3-coordinate geometry to two equivalent U(2), one Ni(2), two equivalent Ni(3), and one Al(7) atom. In the second Al site, Al(7) is bonded to one U(1), one U(2), two equivalent Ni(3), one Al(1), one Al(6), two equivalent Al(2), two equivalent Al(4), and two equivalent Al(9) atoms to form a mixture of distorted face and corner-sharing AlU2Al8Ni2 cuboctahedra. In the third Al site, Al(8) is bonded in a distorted trigonal non-coplanar geometry to one U(2), one Ni(3), and two equivalent Ni(2) atoms. In the fourth Al site, Al(1) is bonded in a distorted trigonal planar geometry to one Ni(2), two equivalent Ni(3), and one Al(7) atom. In the fifth Al site, Al(9) is bonded in a distorted bent 150 degrees geometry to one U(2), two equivalent U(1), one Ni(1), one Ni(3), one Al(2), and two equivalent Al(7) atoms. In the sixth Al site, Al(2) is bonded in a 12-coordinate geometry to two equivalent U(1), two equivalent U(2), one Al(2), one Al(3), one Al(4), one Al(9), two equivalent Al(10), and two equivalent Al(7) atoms. In the seventh Al site, Al(10) is bonded in a distorted single-bond geometry to one U(1), two equivalent U(2), one Ni(1), and four equivalent Al(2) atoms. In the eighth Al site, Al(3) is bonded in a 2-coordinate geometry to one U(1), two equivalent U(2), two equivalent Ni(1), and one Al(2) atom. In the ninth Al site, Al(4) is bonded in a distorted bent 150 degrees geometry to two equivalent U(2), one Ni(2), one Ni(3), one Al(2), and two equivalent Al(7) atoms. In the tenth Al site, Al(5) is bonded in a 3-coordinate geometry to one U(2) and three equivalent Ni(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_U3Al19Ni5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.186
_cell_length_b   8.186
_cell_length_c   26.862
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   151.219
_symmetry_Int_Tables_number   1
_cell_volume   866.760
_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
  U  U0  1  0.884  0.116  0.250  1.0
  U  U1  1  0.116  0.884  0.750  1.0
  U  U2  1  0.668  0.332  0.136  1.0
  U  U3  1  0.332  0.668  0.864  1.0
  U  U4  1  0.668  0.332  0.364  1.0
  U  U5  1  0.332  0.668  0.636  1.0
  Al  Al6  1  0.907  0.093  0.463  1.0
  Al  Al7  1  0.093  0.907  0.537  1.0
  Al  Al8  1  0.907  0.093  0.037  1.0
  Al  Al9  1  0.093  0.907  0.963  1.0
  Al  Al10  1  0.276  0.724  0.194  1.0
  Al  Al11  1  0.724  0.276  0.806  1.0
  Al  Al12  1  0.276  0.724  0.306  1.0
  Al  Al13  1  0.724  0.276  0.694  1.0
  Al  Al14  1  0.922  0.078  0.799  1.0
  Al  Al15  1  0.078  0.922  0.201  1.0
  Al  Al16  1  0.922  0.078  0.701  1.0
  Al  Al17  1  0.078  0.922  0.299  1.0
  Al  Al18  1  0.708  0.292  0.911  1.0
  Al  Al19  1  0.292  0.708  0.089  1.0
  Al  Al20  1  0.708  0.292  0.589  1.0
  Al  Al21  1  0.292  0.708  0.411  1.0
  Al  Al22  1  0.736  0.264  0.029  1.0
  Al  Al23  1  0.264  0.736  0.971  1.0
  Al  Al24  1  0.736  0.264  0.471  1.0
  Al  Al25  1  0.264  0.736  0.529  1.0
  Al  Al26  1  0.963  0.037  0.898  1.0
  Al  Al27  1  0.037  0.963  0.102  1.0
  Al  Al28  1  0.963  0.037  0.602  1.0
  Al  Al29  1  0.037  0.963  0.398  1.0
  Al  Al30  1  0.868  0.132  0.364  1.0
  Al  Al31  1  0.132  0.868  0.636  1.0
  Al  Al32  1  0.868  0.132  0.136  1.0
  Al  Al33  1  0.132  0.868  0.864  1.0
  Al  Al34  1  0.432  0.568  0.969  1.0
  Al  Al35  1  0.568  0.432  0.031  1.0
  Al  Al36  1  0.432  0.568  0.531  1.0
  Al  Al37  1  0.568  0.432  0.469  1.0
  Al  Al38  1  0.463  0.537  0.174  1.0
  Al  Al39  1  0.537  0.463  0.826  1.0
  Al  Al40  1  0.463  0.537  0.326  1.0
  Al  Al41  1  0.537  0.463  0.674  1.0
  Al  Al42  1  0.695  0.305  0.250  1.0
  Al  Al43  1  0.305  0.695  0.750  1.0
  Ni  Ni44  1  0.544  0.456  0.250  1.0
  Ni  Ni45  1  0.456  0.544  0.750  1.0
  Ni  Ni46  1  0.840  0.160  0.957  1.0
  Ni  Ni47  1  0.160  0.840  0.043  1.0
  Ni  Ni48  1  0.840  0.160  0.543  1.0
  Ni  Ni49  1  0.160  0.840  0.457  1.0
  Ni  Ni50  1  0.553  0.447  0.916  1.0
  Ni  Ni51  1  0.447  0.553  0.084  1.0
  Ni  Ni52  1  0.553  0.447  0.584  1.0
  Ni  Ni53  1  0.447  0.553  0.416  1.0
[/CIF]
.