data_Na2CoPt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.53
_cell_length_b   4.53
_cell_length_c   4.53
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2CoPt
_chemical_formula_sum   'Na2 Co1 Pt1'
_cell_volume   65.8
_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
  Na  Na1  1  0.0  0.0  0.0  1.0
  Na  Na2  1  0.6  0.6  0.6  1.0
  Co  Co0  1  0.2  0.2  0.2  1.0
  Pt  Pt3  1  0.81  0.81  0.81  1.0

data_Na2CoPt
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.53
_cell_length_b   4.53
_cell_length_c   11.1
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   Na2CoPt
_chemical_formula_sum   'Na6 Co3 Pt3'
_cell_volume   197.4
_cell_formula_units_Z   3
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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
  Na  Na0  3  0.0  0.0  0.0  1.0
  Na  Na1  3  0.0  0.0  0.4  1.0
  Co  Co2  3  0.0  0.0  0.8  1.0
  Pt  Pt3  3  0.0  0.0  0.19  1.0

Na Na Co Pt
Na2CoPt crystallizes in the trigonal R3m space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted linear geometry to four equivalent Co(1) and one Pt(1) atom. There is one shorter (2.27 Å) and three longer (2.98 Å) Na(1)-Co(1) bond lengths. The Na(1)-Pt(1) bond length is 2.15 Å. In the second Na site, Na(2) is bonded in a 1-coordinate geometry to three equivalent Co(1) and one Pt(1) atom. All Na(2)-Co(1) bond lengths are 2.71 Å. The Na(2)-Pt(1) bond length is 2.27 Å. Co(1) is bonded in a 10-coordinate geometry to three equivalent Na(2), four equivalent Na(1), and three equivalent Pt(1) atoms. All Co(1)-Pt(1) bond lengths are 2.71 Å. Pt(1) is bonded in a distorted linear geometry to one Na(1), one Na(2), and three equivalent Co(1) atoms.