data_Ni2AsPt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.39
_cell_length_b   4.39
_cell_length_c   2.91
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   107.33
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ni2AsPt
_chemical_formula_sum   'Ni2 As1 Pt1'
_cell_volume   53.47
_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
  Ni  Ni1  1  0.3  0.77  0.45  1.0
  Ni  Ni2  1  0.3  0.23  0.45  1.0
  As  As0  1  0.0  0.0  0.0  1.0
  Pt  Pt3  1  0.6  0.0  0.0  1.0

data_Ni2AsPt
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.91
_cell_length_b   4.39
_cell_length_c   4.39
_cell_angle_alpha   107.33
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ni2AsPt
_chemical_formula_sum   'Ni2 As1 Pt1'
_cell_volume   53.47
_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
  Ni  Ni0  1  0.45  0.3  0.23  1.0
  Ni  Ni1  1  0.45  0.3  0.77  1.0
  As  As2  1  0.0  0.0  0.0  1.0
  Pt  Pt3  1  0.0  0.6  0.0  1.0

Ni Ni As Pt
PtNi2As crystallizes in the triclinic P1 space group. Pt(1) is bonded in a 5-coordinate geometry to two equivalent Ni(1), two equivalent Ni(2), and one As(1) atom. There is one shorter (1.93 Å) and one longer (2.12 Å) Pt(1)-Ni(1) bond length. There is one shorter (2.31 Å) and one longer (2.47 Å) Pt(1)-Ni(2) bond length. The Pt(1)-As(1) bond length is 1.75 Å. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 6-coordinate geometry to two equivalent Pt(1), two equivalent Ni(2), and two equivalent As(1) atoms. There is one shorter (2.04 Å) and one longer (2.35 Å) Ni(1)-Ni(2) bond length. There is one shorter (2.31 Å) and one longer (2.47 Å) Ni(1)-As(1) bond length. In the second Ni site, Ni(2) is bonded in a 6-coordinate geometry to two equivalent Pt(1), two equivalent Ni(1), and two equivalent As(1) atoms. There is one shorter (1.93 Å) and one longer (2.12 Å) Ni(2)-As(1) bond length. As(1) is bonded in a 5-coordinate geometry to one Pt(1), two equivalent Ni(1), and two equivalent Ni(2) atoms.