The structure described by Ba2YbCl7 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 10-coordinate geometry to one Cl(1), one Cl(2), one Cl(3), one Cl(7), two equivalent Cl(4), two equivalent Cl(5), and two equivalent Cl(6) atoms. In the second Ba site, Ba(2) is bonded in a 10-coordinate geometry to one Cl(1), one Cl(4), one Cl(5), one Cl(6), two equivalent Cl(2), two equivalent Cl(3), and two equivalent Cl(7) atoms. Yb(1) is bonded in a 7-coordinate geometry to one Cl(1), one Cl(2), one Cl(3), one Cl(4), one Cl(5), one Cl(6), and one Cl(7) atom. There are seven inequivalent Cl sites. In the first Cl site, Cl(6) is bonded to one Ba(2), two equivalent Ba(1), and one Yb(1) atom to form a mixture of distorted corner and edge-sharing ClBa3Yb tetrahedra. In the second Cl site, Cl(7) is bonded to one Ba(1), two equivalent Ba(2), and one Yb(1) atom to form a mixture of distorted corner and edge-sharing ClBa3Yb tetrahedra. In the third Cl site, Cl(1) is bonded in a distorted T-shaped geometry to one Ba(1), one Ba(2), and one Yb(1) atom. In the fourth Cl site, Cl(2) is bonded to one Ba(1), two equivalent Ba(2), and one Yb(1) atom to form a mixture of corner and edge-sharing ClBa3Yb tetrahedra. In the fifth Cl site, Cl(3) is bonded in a 4-coordinate geometry to one Ba(1), two equivalent Ba(2), and one Yb(1) atom. In the sixth Cl site, Cl(4) is bonded in a 4-coordinate geometry to one Ba(2), two equivalent Ba(1), and one Yb(1) atom. In the seventh Cl site, Cl(5) is bonded to one Ba(2), two equivalent Ba(1), and one Yb(1) atom to form a mixture of distorted corner and edge-sharing ClBa3Yb tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ba2YbCl7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.027
_cell_length_b   11.033
_cell_length_c   16.459
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.304
_symmetry_Int_Tables_number   1
_cell_volume   1094.362
_cell_formula_units_Z   4
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  0.246  0.943  0.787  1.0
  Ba  Ba1  1  0.754  0.057  0.213  1.0
  Ba  Ba2  1  0.754  0.557  0.287  1.0
  Ba  Ba3  1  0.246  0.443  0.713  1.0
  Ba  Ba4  1  0.751  0.683  0.936  1.0
  Ba  Ba5  1  0.249  0.317  0.064  1.0
  Ba  Ba6  1  0.249  0.817  0.436  1.0
  Ba  Ba7  1  0.751  0.183  0.564  1.0
  Yb  Yb8  1  0.722  0.698  0.617  1.0
  Yb  Yb9  1  0.278  0.302  0.383  1.0
  Yb  Yb10  1  0.278  0.802  0.117  1.0
  Yb  Yb11  1  0.722  0.198  0.883  1.0
  Cl  Cl12  1  0.284  0.632  0.575  1.0
  Cl  Cl13  1  0.716  0.368  0.425  1.0
  Cl  Cl14  1  0.716  0.868  0.075  1.0
  Cl  Cl15  1  0.284  0.132  0.925  1.0
  Cl  Cl16  1  0.993  0.918  0.605  1.0
  Cl  Cl17  1  0.007  0.082  0.395  1.0
  Cl  Cl18  1  0.007  0.582  0.105  1.0
  Cl  Cl19  1  0.993  0.418  0.895  1.0
  Cl  Cl20  1  0.755  0.720  0.453  1.0
  Cl  Cl21  1  0.245  0.280  0.547  1.0
  Cl  Cl22  1  0.245  0.780  0.953  1.0
  Cl  Cl23  1  0.755  0.220  0.047  1.0
  Cl  Cl24  1  0.752  0.955  0.857  1.0
  Cl  Cl25  1  0.248  0.045  0.143  1.0
  Cl  Cl26  1  0.248  0.545  0.357  1.0
  Cl  Cl27  1  0.752  0.455  0.643  1.0
  Cl  Cl28  1  0.990  0.691  0.758  1.0
  Cl  Cl29  1  0.010  0.309  0.242  1.0
  Cl  Cl30  1  0.010  0.809  0.258  1.0
  Cl  Cl31  1  0.990  0.191  0.742  1.0
  Cl  Cl32  1  0.498  0.691  0.764  1.0
  Cl  Cl33  1  0.502  0.309  0.236  1.0
  Cl  Cl34  1  0.502  0.809  0.264  1.0
  Cl  Cl35  1  0.498  0.191  0.736  1.0
  Cl  Cl36  1  0.499  0.924  0.605  1.0
  Cl  Cl37  1  0.501  0.076  0.395  1.0
  Cl  Cl38  1  0.501  0.576  0.105  1.0
  Cl  Cl39  1  0.499  0.424  0.895  1.0
[/CIF]
.
The structure described by Ba2YbCl7 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 10-coordinate geometry to one Cl(1), one Cl(2), one Cl(3), one Cl(7), two equivalent Cl(4), two equivalent Cl(5), and two equivalent Cl(6) atoms. In the second Ba site, Ba(2) is bonded in a 10-coordinate geometry to one Cl(1), one Cl(4), one Cl(5), one Cl(6), two equivalent Cl(2), two equivalent Cl(3), and two equivalent Cl(7) atoms. Yb(1) is bonded in a 7-coordinate geometry to one Cl(1), one Cl(2), one Cl(3), one Cl(4), one Cl(5), one Cl(6), and one Cl(7) atom. There are seven inequivalent Cl sites. In the first Cl site, Cl(6) is bonded to one Ba(2), two equivalent Ba(1), and one Yb(1) atom to form a mixture of distorted corner and edge-sharing ClBa3Yb tetrahedra. In the second Cl site, Cl(7) is bonded to one Ba(1), two equivalent Ba(2), and one Yb(1) atom to form a mixture of distorted corner and edge-sharing ClBa3Yb tetrahedra. In the third Cl site, Cl(1) is bonded in a distorted T-shaped geometry to one Ba(1), one Ba(2), and one Yb(1) atom. In the fourth Cl site, Cl(2) is bonded to one Ba(1), two equivalent Ba(2), and one Yb(1) atom to form a mixture of corner and edge-sharing ClBa3Yb tetrahedra. In the fifth Cl site, Cl(3) is bonded in a 4-coordinate geometry to one Ba(1), two equivalent Ba(2), and one Yb(1) atom. In the sixth Cl site, Cl(4) is bonded in a 4-coordinate geometry to one Ba(2), two equivalent Ba(1), and one Yb(1) atom. In the seventh Cl site, Cl(5) is bonded to one Ba(2), two equivalent Ba(1), and one Yb(1) atom to form a mixture of distorted corner and edge-sharing ClBa3Yb tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ba2YbCl7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.027
_cell_length_b   11.033
_cell_length_c   16.459
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.304
_symmetry_Int_Tables_number   1
_cell_volume   1094.362
_cell_formula_units_Z   4
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  0.246  0.943  0.787  1.0
  Ba  Ba1  1  0.754  0.057  0.213  1.0
  Ba  Ba2  1  0.754  0.557  0.287  1.0
  Ba  Ba3  1  0.246  0.443  0.713  1.0
  Ba  Ba4  1  0.751  0.683  0.936  1.0
  Ba  Ba5  1  0.249  0.317  0.064  1.0
  Ba  Ba6  1  0.249  0.817  0.436  1.0
  Ba  Ba7  1  0.751  0.183  0.564  1.0
  Yb  Yb8  1  0.722  0.698  0.617  1.0
  Yb  Yb9  1  0.278  0.302  0.383  1.0
  Yb  Yb10  1  0.278  0.802  0.117  1.0
  Yb  Yb11  1  0.722  0.198  0.883  1.0
  Cl  Cl12  1  0.284  0.632  0.575  1.0
  Cl  Cl13  1  0.716  0.368  0.425  1.0
  Cl  Cl14  1  0.716  0.868  0.075  1.0
  Cl  Cl15  1  0.284  0.132  0.925  1.0
  Cl  Cl16  1  0.993  0.918  0.605  1.0
  Cl  Cl17  1  0.007  0.082  0.395  1.0
  Cl  Cl18  1  0.007  0.582  0.105  1.0
  Cl  Cl19  1  0.993  0.418  0.895  1.0
  Cl  Cl20  1  0.755  0.720  0.453  1.0
  Cl  Cl21  1  0.245  0.280  0.547  1.0
  Cl  Cl22  1  0.245  0.780  0.953  1.0
  Cl  Cl23  1  0.755  0.220  0.047  1.0
  Cl  Cl24  1  0.752  0.955  0.857  1.0
  Cl  Cl25  1  0.248  0.045  0.143  1.0
  Cl  Cl26  1  0.248  0.545  0.357  1.0
  Cl  Cl27  1  0.752  0.455  0.643  1.0
  Cl  Cl28  1  0.990  0.691  0.758  1.0
  Cl  Cl29  1  0.010  0.309  0.242  1.0
  Cl  Cl30  1  0.010  0.809  0.258  1.0
  Cl  Cl31  1  0.990  0.191  0.742  1.0
  Cl  Cl32  1  0.498  0.691  0.764  1.0
  Cl  Cl33  1  0.502  0.309  0.236  1.0
  Cl  Cl34  1  0.502  0.809  0.264  1.0
  Cl  Cl35  1  0.498  0.191  0.736  1.0
  Cl  Cl36  1  0.499  0.924  0.605  1.0
  Cl  Cl37  1  0.501  0.076  0.395  1.0
  Cl  Cl38  1  0.501  0.576  0.105  1.0
  Cl  Cl39  1  0.499  0.424  0.895  1.0
[/CIF]
.