data_SrLaHgPt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.16
_cell_length_b   5.16
_cell_length_c   5.16
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrLaHgPt
_chemical_formula_sum   'Sr1 La1 Hg1 Pt1'
_cell_volume   97.16
_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
  Sr  Sr3  1  0.0  0.0  0.0  1.0
  La  La1  1  0.47  0.47  0.47  1.0
  Hg  Hg0  1  0.82  0.82  0.82  1.0
  Pt  Pt2  1  0.65  0.65  0.65  1.0

data_SrLaHgPt
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.16
_cell_length_b   5.16
_cell_length_c   12.64
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   SrLaHgPt
_chemical_formula_sum   'Sr3 La3 Hg3 Pt3'
_cell_volume   291.49
_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
  Sr  Sr0  3  0.0  0.0  0.0  1.0
  La  La1  3  0.0  0.0  0.53  1.0
  Hg  Hg2  3  0.0  0.0  0.18  1.0
  Pt  Pt3  3  0.0  0.0  0.35  1.0

Sr La Hg Pt
Sr La Hg Pt 0 2 - - - 1 3 o o o 2 3 o o o 
SrLaPtHg crystallizes in the trigonal R3m space group. Sr(1) is bonded to three equivalent Pt(1) and one Hg(1) atom to form distorted SrHgPt3 trigonal pyramids that share  a cornercorner with one Pt(1)Sr3LaHg trigonal bipyramid and corners with six equivalent Sr(1)HgPt3 trigonal pyramids. All Sr(1)-Pt(1) bond lengths are 2.99 Å. The Sr(1)-Hg(1) bond length is 2.22 Å. La(1) is bonded in a distorted single-bond geometry to one Pt(1) and three equivalent Hg(1) atoms. The La(1)-Pt(1) bond length is 2.22 Å. All La(1)-Hg(1) bond lengths are 2.99 Å. Pt(1) is bonded to three equivalent Sr(1), one La(1), and one Hg(1) atom to form distorted PtSr3LaHg trigonal bipyramids that share corners with six equivalent Pt(1)Sr3LaHg trigonal bipyramids and  a cornercorner with one Sr(1)HgPt3 trigonal pyramid. The Pt(1)-Hg(1) bond length is 2.22 Å. Hg(1) is bonded in a 5-coordinate geometry to one Sr(1), three equivalent La(1), and one Pt(1) atom.