data_SrTlCoHg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.2
_cell_length_b   5.2
_cell_length_c   5.2
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrTlCoHg
_chemical_formula_sum   'Sr1 Tl1 Co1 Hg1'
_cell_volume   99.14
_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  Sr2  1  0.84  0.84  0.84  1.0
  Tl  Tl3  1  0.67  0.67  0.67  1.0
  Co  Co0  1  0.0  0.0  0.0  1.0
  Hg  Hg1  1  0.51  0.51  0.51  1.0

data_SrTlCoHg
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.2
_cell_length_b   5.2
_cell_length_c   12.73
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   SrTlCoHg
_chemical_formula_sum   'Sr3 Tl3 Co3 Hg3'
_cell_volume   297.43
_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  0.16  1.0
  Tl  Tl1  3  0.0  0.0  0.33  1.0
  Co  Co2  3  0.0  0.0  0.0  1.0
  Hg  Hg3  3  0.0  0.0  0.49  1.0

Sr Tl Co Hg
SrCoHgTl crystallizes in the trigonal R3m space group. Sr(1) is bonded to one Co(1), three equivalent Hg(1), and one Tl(1) atom to form distorted SrTlCoHg3 trigonal bipyramids that share corners with six equivalent Sr(1)TlCoHg3 trigonal bipyramids and  a cornercorner with one Hg(1)Sr3Tl trigonal pyramid. The Sr(1)-Co(1) bond length is 2.08 Å. All Sr(1)-Hg(1) bond lengths are 3.00 Å. The Sr(1)-Tl(1) bond length is 2.08 Å. Co(1) is bonded in a distorted single-bond geometry to one Sr(1) atom. Hg(1) is bonded to three equivalent Sr(1) and one Tl(1) atom to form HgSr3Tl trigonal pyramids that share  a cornercorner with one Sr(1)TlCoHg3 trigonal bipyramid and corners with six equivalent Hg(1)Sr3Tl trigonal pyramids. The Hg(1)-Tl(1) bond length is 2.08 Å. Tl(1) is bonded in a distorted linear geometry to one Sr(1) and one Hg(1) atom.