The material described by Pt3As is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Pt(1) is bonded to eight equivalent Pt(1) and four equivalent As(1) atoms to form PtAs4Pt8 cuboctahedra that share corners with four equivalent As(1)Pt12 cuboctahedra, corners with fourteen equivalent Pt(1)As4Pt8 cuboctahedra, edges with six equivalent As(1)Pt12 cuboctahedra, edges with twelve equivalent Pt(1)As4Pt8 cuboctahedra, faces with four equivalent As(1)Pt12 cuboctahedra, and faces with sixteen equivalent Pt(1)As4Pt8 cuboctahedra. As(1) is bonded to twelve equivalent Pt(1) atoms to form AsPt12 cuboctahedra that share corners with six equivalent As(1)Pt12 cuboctahedra, corners with twelve equivalent Pt(1)As4Pt8 cuboctahedra, edges with eighteen equivalent Pt(1)As4Pt8 cuboctahedra, faces with eight equivalent As(1)Pt12 cuboctahedra, and faces with twelve equivalent Pt(1)As4Pt8 cuboctahedra. is represented by the CIF file [CIF]
data_AsPt3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.587
_cell_length_b   5.587
_cell_length_c   4.771
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   128.971
_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
  As  As0  1  0.333  0.667  0.750  1.0
  As  As1  1  0.667  0.333  0.250  1.0
  Pt  Pt2  1  0.166  0.333  0.250  1.0
  Pt  Pt3  1  0.667  0.834  0.250  1.0
  Pt  Pt4  1  0.166  0.834  0.250  1.0
  Pt  Pt5  1  0.834  0.667  0.750  1.0
  Pt  Pt6  1  0.333  0.166  0.750  1.0
  Pt  Pt7  1  0.834  0.166  0.750  1.0
[/CIF]
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The material described by Pt3As is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Pt(1) is bonded to eight equivalent Pt(1) and four equivalent As(1) atoms to form PtAs4Pt8 cuboctahedra that share corners with four equivalent As(1)Pt12 cuboctahedra, corners with fourteen equivalent Pt(1)As4Pt8 cuboctahedra, edges with six equivalent As(1)Pt12 cuboctahedra, edges with twelve equivalent Pt(1)As4Pt8 cuboctahedra, faces with four equivalent As(1)Pt12 cuboctahedra, and faces with sixteen equivalent Pt(1)As4Pt8 cuboctahedra. As(1) is bonded to twelve equivalent Pt(1) atoms to form AsPt12 cuboctahedra that share corners with six equivalent As(1)Pt12 cuboctahedra, corners with twelve equivalent Pt(1)As4Pt8 cuboctahedra, edges with eighteen equivalent Pt(1)As4Pt8 cuboctahedra, faces with eight equivalent As(1)Pt12 cuboctahedra, and faces with twelve equivalent Pt(1)As4Pt8 cuboctahedra. is represented by the CIF file [CIF]
data_AsPt3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.587
_cell_length_b   5.587
_cell_length_c   4.771
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   128.971
_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
  As  As0  1  0.333  0.667  0.750  1.0
  As  As1  1  0.667  0.333  0.250  1.0
  Pt  Pt2  1  0.166  0.333  0.250  1.0
  Pt  Pt3  1  0.667  0.834  0.250  1.0
  Pt  Pt4  1  0.166  0.834  0.250  1.0
  Pt  Pt5  1  0.834  0.667  0.750  1.0
  Pt  Pt6  1  0.333  0.166  0.750  1.0
  Pt  Pt7  1  0.834  0.166  0.750  1.0
[/CIF]
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