data_LaBeTlCo
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.91
_cell_length_b   4.91
_cell_length_c   4.91
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   LaBeTlCo
_chemical_formula_sum   'La1 Be1 Tl1 Co1'
_cell_volume   83.73
_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
  La  La2  1  0.47  0.47  0.47  1.0
  Be  Be0  1  0.0  0.0  0.0  1.0
  Tl  Tl3  1  0.74  0.74  0.74  1.0
  Co  Co1  1  0.21  0.21  0.21  1.0

data_LaBeTlCo
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.91
_cell_length_b   4.91
_cell_length_c   12.03
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   LaBeTlCo
_chemical_formula_sum   'La3 Be3 Tl3 Co3'
_cell_volume   251.19
_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
  La  La0  3  0.0  0.0  0.53  1.0
  Be  Be1  3  0.0  0.0  -0.0  1.0
  Tl  Tl2  3  0.0  0.0  0.26  1.0
  Co  Co3  3  0.0  0.0  0.79  1.0

La Be Tl Co
La Be Tl Co 0 3 o o o 0 3 o o + 0 3 o + o 0 3 + o o 0 1 o o + 0 1 o + o 0 1 + o o 0 2 - o o 0 2 o - o 0 2 o o - 0 2 o o o 1 3 o - o 1 3 - o o 1 3 o o - 1 3 o o o 1 2 - - - 1 2 - - o 1 2 - o - 1 2 o - - 2 3 o + + 2 3 + o + 2 3 + + o 
BeLaCoTl crystallizes in the trigonal R3m space group. Be(1) is bonded in a distorted single-bond geometry to one Co(1) and three equivalent Tl(1) atoms. The Be(1)-Co(1) bond length is 2.51 Å. All Be(1)-Tl(1) bond lengths are 2.96 Å. La(1) is bonded in a 8-coordinate geometry to four equivalent Co(1) and four equivalent Tl(1) atoms. There are three shorter (2.96 Å) and one longer (3.17 Å) La(1)-Co(1) bond length. There are three shorter (2.96 Å) and one longer (3.17 Å) La(1)-Tl(1) bond length. Co(1) is bonded in a 5-coordinate geometry to one Be(1) and four equivalent La(1) atoms. Tl(1) is bonded in a 7-coordinate geometry to three equivalent Be(1) and four equivalent La(1) atoms.