The structure described by LaPtNi4 crystallizes in the orthorhombic Cmmm space group. La(1) is bonded in a 18-coordinate geometry to four equivalent Pt(1), six equivalent Ni(1), and eight equivalent Ni(2) atoms. Pt(1) is bonded to four equivalent La(1), four equivalent Ni(1), and four equivalent Ni(2) atoms to form PtLa4Ni8 cuboctahedra that share corners with eight equivalent Pt(1)La4Ni8 cuboctahedra, corners with eight equivalent Ni(2)La4Ni6Pt2 cuboctahedra, edges with two equivalent Pt(1)La4Ni8 cuboctahedra, edges with eight equivalent Ni(2)La4Ni6Pt2 cuboctahedra, faces with two equivalent Pt(1)La4Ni8 cuboctahedra, and faces with eight equivalent Ni(2)La4Ni6Pt2 cuboctahedra. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 11-coordinate geometry to three equivalent La(1), two equivalent Pt(1), two equivalent Ni(1), and four equivalent Ni(2) atoms. In the second Ni site, Ni(2) is bonded to four equivalent La(1), two equivalent Pt(1), two equivalent Ni(2), and four equivalent Ni(1) atoms to form distorted NiLa4Ni6Pt2 cuboctahedra that share corners with four equivalent Pt(1)La4Ni8 cuboctahedra, corners with twelve equivalent Ni(2)La4Ni6Pt2 cuboctahedra, edges with four equivalent Pt(1)La4Ni8 cuboctahedra, edges with six equivalent Ni(2)La4Ni6Pt2 cuboctahedra, faces with four equivalent Pt(1)La4Ni8 cuboctahedra, and faces with six equivalent Ni(2)La4Ni6Pt2 cuboctahedra. is represented by the CIF file [CIF]
data_LaNi4Pt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.163
_cell_length_b   5.163
_cell_length_c   4.007
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   123.326
_symmetry_Int_Tables_number   1
_cell_volume   89.230
_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  0.500  0.500  0.000  1.0
  Ni  Ni1  1  0.183  0.817  0.000  1.0
  Ni  Ni2  1  0.817  0.183  0.000  1.0
  Ni  Ni3  1  0.000  0.500  0.500  1.0
  Ni  Ni4  1  0.500  0.000  0.500  1.0
  Pt  Pt5  1  0.000  0.000  0.500  1.0
[/CIF]
.
The structure described by LaPtNi4 crystallizes in the orthorhombic Cmmm space group. La(1) is bonded in a 18-coordinate geometry to four equivalent Pt(1), six equivalent Ni(1), and eight equivalent Ni(2) atoms. Pt(1) is bonded to four equivalent La(1), four equivalent Ni(1), and four equivalent Ni(2) atoms to form PtLa4Ni8 cuboctahedra that share corners with eight equivalent Pt(1)La4Ni8 cuboctahedra, corners with eight equivalent Ni(2)La4Ni6Pt2 cuboctahedra, edges with two equivalent Pt(1)La4Ni8 cuboctahedra, edges with eight equivalent Ni(2)La4Ni6Pt2 cuboctahedra, faces with two equivalent Pt(1)La4Ni8 cuboctahedra, and faces with eight equivalent Ni(2)La4Ni6Pt2 cuboctahedra. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 11-coordinate geometry to three equivalent La(1), two equivalent Pt(1), two equivalent Ni(1), and four equivalent Ni(2) atoms. In the second Ni site, Ni(2) is bonded to four equivalent La(1), two equivalent Pt(1), two equivalent Ni(2), and four equivalent Ni(1) atoms to form distorted NiLa4Ni6Pt2 cuboctahedra that share corners with four equivalent Pt(1)La4Ni8 cuboctahedra, corners with twelve equivalent Ni(2)La4Ni6Pt2 cuboctahedra, edges with four equivalent Pt(1)La4Ni8 cuboctahedra, edges with six equivalent Ni(2)La4Ni6Pt2 cuboctahedra, faces with four equivalent Pt(1)La4Ni8 cuboctahedra, and faces with six equivalent Ni(2)La4Ni6Pt2 cuboctahedra. is represented by the CIF file [CIF]
data_LaNi4Pt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.163
_cell_length_b   5.163
_cell_length_c   4.007
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   123.326
_symmetry_Int_Tables_number   1
_cell_volume   89.230
_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  0.500  0.500  0.000  1.0
  Ni  Ni1  1  0.183  0.817  0.000  1.0
  Ni  Ni2  1  0.817  0.183  0.000  1.0
  Ni  Ni3  1  0.000  0.500  0.500  1.0
  Ni  Ni4  1  0.500  0.000  0.500  1.0
  Pt  Pt5  1  0.000  0.000  0.500  1.0
[/CIF]
.