data_KSrAlPt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.21
_cell_length_b   5.21
_cell_length_c   5.21
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   KSrAlPt
_chemical_formula_sum   'K1 Sr1 Al1 Pt1'
_cell_volume   99.97
_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
  K  K1  1  0.68  0.68  0.68  1.0
  Sr  Sr3  1  0.53  0.53  0.53  1.0
  Al  Al0  1  0.0  0.0  0.0  1.0
  Pt  Pt2  1  0.84  0.84  0.84  1.0

data_KSrAlPt
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.21
_cell_length_b   5.21
_cell_length_c   12.76
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   KSrAlPt
_chemical_formula_sum   'K3 Sr3 Al3 Pt3'
_cell_volume   299.9
_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
  K  K0  3  0.0  0.0  0.32  1.0
  Sr  Sr1  3  0.0  0.0  0.47  1.0
  Al  Al2  3  0.0  0.0  0.0  1.0
  Pt  Pt3  3  0.0  0.0  0.16  1.0

K Sr Al Pt
KSrPtAl crystallizes in the trigonal R3m space group. K(1) is bonded in a distorted single-bond geometry to one Sr(1), one Pt(1), and three equivalent Al(1) atoms. The K(1)-Sr(1) bond length is 2.02 Å. The K(1)-Pt(1) bond length is 2.02 Å. All K(1)-Al(1) bond lengths are 3.02 Å. Sr(1) is bonded to one K(1) and three equivalent Pt(1) atoms to form SrKPt3 trigonal pyramids that share  a cornercorner with one Pt(1)KSr3Al trigonal bipyramid and corners with six equivalent Sr(1)KPt3 trigonal pyramids. All Sr(1)-Pt(1) bond lengths are 3.02 Å. Pt(1) is bonded to one K(1), three equivalent Sr(1), and one Al(1) atom to form distorted PtKSr3Al trigonal bipyramids that share corners with six equivalent Pt(1)KSr3Al trigonal bipyramids and  a cornercorner with one Sr(1)KPt3 trigonal pyramid. The Pt(1)-Al(1) bond length is 2.02 Å. Al(1) is bonded in a distorted single-bond geometry to three equivalent K(1) and one Pt(1) atom.