data_YBeTlPb
_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   YBeTlPb
_chemical_formula_sum   'Y1 Be1 Tl1 Pb1'
_cell_volume   98.01
_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
  Y  Y3  1  0.66  0.66  0.66  1.0
  Be  Be0  1  0.0  0.0  0.0  1.0
  Tl  Tl2  1  0.83  0.83  0.83  1.0
  Pb  Pb1  1  0.49  0.49  0.49  1.0

data_YBeTlPb
_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   YBeTlPb
_chemical_formula_sum   'Y3 Be3 Tl3 Pb3'
_cell_volume   294.03
_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
  Y  Y0  3  0.0  0.0  0.34  1.0
  Be  Be1  3  0.0  0.0  0.0  1.0
  Tl  Tl2  3  0.0  0.0  0.17  1.0
  Pb  Pb3  3  0.0  0.0  0.51  1.0

Y Be Tl Pb
BeYTlPb crystallizes in the trigonal R3m space group. Be(1) is bonded to three equivalent Y(1) and one Tl(1) atom to form BeY3Tl trigonal pyramids that share corners with three equivalent Tl(1)YBePb3 trigonal bipyramids and corners with six equivalent Be(1)Y3Tl trigonal pyramids. All Be(1)-Y(1) bond lengths are 2.99 Å. The Be(1)-Tl(1) bond length is 2.16 Å. Y(1) is bonded in a distorted linear geometry to three equivalent Be(1), one Tl(1), and one Pb(1) atom. The Y(1)-Tl(1) bond length is 2.16 Å. The Y(1)-Pb(1) bond length is 2.16 Å. Tl(1) is bonded to one Be(1), one Y(1), and three equivalent Pb(1) atoms to form distorted TlYBePb3 trigonal bipyramids that share corners with six equivalent Tl(1)YBePb3 trigonal bipyramids and corners with three equivalent Be(1)Y3Tl trigonal pyramids. All Tl(1)-Pb(1) bond lengths are 2.99 Å. Pb(1) is bonded in a distorted single-bond geometry to one Y(1) and three equivalent Tl(1) atoms.