data_Ba2SrYb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.77
_cell_length_b   6.77
_cell_length_c   6.77
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ba2SrYb
_chemical_formula_sum   'Ba2 Sr1 Yb1'
_cell_volume   219.89
_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
  Ba  Ba0  1  0.4  0.4  0.4  1.0
  Ba  Ba1  1  0.19  0.19  0.19  1.0
  Sr  Sr2  1  0.0  0.0  0.0  1.0
  Yb  Yb3  1  0.79  0.79  0.79  1.0

data_Ba2SrYb
_symmetry_space_group_name_H-M   R3m
_cell_length_a   6.77
_cell_length_b   6.77
_cell_length_c   16.6
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   Ba2SrYb
_chemical_formula_sum   'Ba6 Sr3 Yb3'
_cell_volume   659.68
_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
  Ba  Ba0  3  0.0  0.0  0.6  1.0
  Ba  Ba1  3  0.0  0.0  0.81  1.0
  Sr  Sr2  3  0.0  0.0  0.0  1.0
  Yb  Yb3  3  0.0  0.0  0.21  1.0

Ba Ba Sr Yb
Ba2SrYb crystallizes in the trigonal R3m space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 7-coordinate geometry to one Ba(2), three equivalent Sr(1), and three equivalent Yb(1) atoms. The Ba(1)-Ba(2) bond length is 3.47 Å. All Ba(1)-Sr(1) bond lengths are 4.04 Å. All Ba(1)-Yb(1) bond lengths are 4.04 Å. In the second Ba site, Ba(2) is bonded in a 5-coordinate geometry to one Ba(1), one Sr(1), and three equivalent Yb(1) atoms. The Ba(2)-Sr(1) bond length is 3.09 Å. All Ba(2)-Yb(1) bond lengths are 4.04 Å. Sr(1) is bonded in a distorted linear geometry to one Ba(2), three equivalent Ba(1), and one Yb(1) atom. The Sr(1)-Yb(1) bond length is 3.47 Å. Yb(1) is bonded in a 7-coordinate geometry to three equivalent Ba(1), three equivalent Ba(2), and one Sr(1) atom.