data_EuTl2Ag
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.18
_cell_length_b   5.18
_cell_length_c   5.18
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   EuTl2Ag
_chemical_formula_sum   'Eu1 Tl2 Ag1'
_cell_volume   98.04
_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
  Eu  Eu1  1  0.66  0.66  0.66  1.0
  Tl  Tl2  1  0.49  0.49  0.49  1.0
  Tl  Tl3  1  0.83  0.83  0.83  1.0
  Ag  Ag0  1  0.0  0.0  0.0  1.0

data_EuTl2Ag
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.18
_cell_length_b   5.18
_cell_length_c   12.68
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   EuTl2Ag
_chemical_formula_sum   'Eu3 Tl6 Ag3'
_cell_volume   294.13
_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
  Eu  Eu0  3  0.0  0.0  0.34  1.0
  Tl  Tl1  3  0.0  0.0  0.17  1.0
  Tl  Tl2  3  0.0  0.0  0.51  1.0
  Ag  Ag3  3  0.0  0.0  0.0  1.0

Eu Tl Tl Ag
EuAgTl2 crystallizes in the trigonal R3m space group. Eu(1) is bonded to three equivalent Ag(1), one Tl(1), and one Tl(2) atom to form distorted EuTl2Ag3 trigonal bipyramids that share corners with six equivalent Eu(1)Tl2Ag3 trigonal bipyramids and  a cornercorner with one Ag(1)Eu3Tl trigonal pyramid. All Eu(1)-Ag(1) bond lengths are 2.99 Å. The Eu(1)-Tl(1) bond length is 2.16 Å. The Eu(1)-Tl(2) bond length is 2.16 Å. Ag(1) is bonded to three equivalent Eu(1) and one Tl(2) atom to form distorted AgEu3Tl trigonal pyramids that share  a cornercorner with one Eu(1)Tl2Ag3 trigonal bipyramid and corners with six equivalent Ag(1)Eu3Tl trigonal pyramids. The Ag(1)-Tl(2) bond length is 2.16 Å. There are two inequivalent Tl sites. In the first Tl site, Tl(1) is bonded in a single-bond geometry to one Eu(1) atom. In the second Tl site, Tl(2) is bonded in a linear geometry to one Eu(1) and one Ag(1) atom.