The material structure described by Ba2AlSn2F11 crystallizes in the trigonal P3_2 space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 9-coordinate geometry to one F(1), one F(10), one F(11), one F(2), one F(4), one F(6), one F(8), and two equivalent F(5) atoms. In the second Ba site, Ba(2) is bonded in a 8-coordinate geometry to one F(1), one F(10), one F(2), one F(3), one F(4), one F(7), one F(8), and one F(9) atom. Al(1) is bonded in an octahedral geometry to one F(10), one F(11), one F(3), one F(5), one F(7), and one F(9) atom. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 3-coordinate geometry to one F(3), one F(4), one F(5), and one F(6) atom. In the second Sn site, Sn(2) is bonded in a 3-coordinate geometry to one F(1), one F(2), one F(6), and one F(8) atom. There are eleven inequivalent F sites. In the first F site, F(10) is bonded in a distorted single-bond geometry to one Ba(1), one Ba(2), and one Al(1) atom. In the second F site, F(11) is bonded in a distorted single-bond geometry to one Ba(1) and one Al(1) atom. In the third F site, F(1) is bonded in a 3-coordinate geometry to one Ba(1), one Ba(2), and one Sn(2) atom. In the fourth F site, F(2) is bonded in a distorted trigonal non-coplanar geometry to one Ba(1), one Ba(2), and one Sn(2) atom. In the fifth F site, F(3) is bonded in a 3-coordinate geometry to one Ba(2), one Al(1), and one Sn(1) atom. In the sixth F site, F(4) is bonded in a distorted trigonal planar geometry to one Ba(1), one Ba(2), and one Sn(1) atom. In the seventh F site, F(5) is bonded in a 2-coordinate geometry to two equivalent Ba(1), one Al(1), and one Sn(1) atom. In the eighth F site, F(6) is bonded in a 3-coordinate geometry to one Ba(1), one Sn(1), and one Sn(2) atom. In the ninth F site, F(7) is bonded in a distorted single-bond geometry to one Ba(2) and one Al(1) atom. In the tenth F site, F(8) is bonded in a trigonal non-coplanar geometry to one Ba(1), one Ba(2), and one Sn(2) atom. In the eleventh F site, F(9) is bonded in a distorted single-bond geometry to one Ba(2) and one Al(1) atom. is represented by the CIF file [CIF]
data_Ba2AlSn2F11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.828
_cell_length_b   7.828
_cell_length_c   15.500
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   822.468
_cell_formula_units_Z   3
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  0.812  0.852  0.654  1.0
  Ba  Ba1  1  0.481  0.122  0.792  1.0
  Ba  Ba2  1  0.040  0.188  0.987  1.0
  Ba  Ba3  1  0.878  0.359  0.459  1.0
  Ba  Ba4  1  0.641  0.519  0.125  1.0
  Ba  Ba5  1  0.148  0.960  0.321  1.0
  Al  Al6  1  0.521  0.690  0.872  1.0
  Al  Al7  1  0.169  0.479  0.205  1.0
  Al  Al8  1  0.310  0.831  0.538  1.0
  Sn  Sn9  1  0.919  0.669  0.894  1.0
  Sn  Sn10  1  0.072  0.409  0.733  1.0
  Sn  Sn11  1  0.591  0.663  0.400  1.0
  Sn  Sn12  1  0.750  0.081  0.227  1.0
  Sn  Sn13  1  0.337  0.928  0.066  1.0
  Sn  Sn14  1  0.331  0.250  0.560  1.0
  F  F15  1  0.011  0.853  0.056  1.0
  F  F16  1  0.870  0.289  0.851  1.0
  F  F17  1  0.842  0.989  0.389  1.0
  F  F18  1  0.499  0.074  0.489  1.0
  F  F19  1  0.806  0.838  0.221  1.0
  F  F20  1  0.070  0.204  0.188  1.0
  F  F21  1  0.926  0.425  0.156  1.0
  F  F22  1  0.796  0.866  0.855  1.0
  F  F23  1  0.032  0.194  0.554  1.0
  F  F24  1  0.710  0.044  0.089  1.0
  F  F25  1  0.575  0.501  0.823  1.0
  F  F26  1  0.147  0.158  0.722  1.0
  F  F27  1  0.602  0.645  0.974  1.0
  F  F28  1  0.410  0.216  0.014  1.0
  F  F29  1  0.043  0.398  0.308  1.0
  F  F30  1  0.711  0.580  0.518  1.0
  F  F31  1  0.489  0.887  0.915  1.0
  F  F32  1  0.334  0.290  0.422  1.0
  F  F33  1  0.239  0.729  0.430  1.0
  F  F34  1  0.355  0.957  0.641  1.0
  F  F35  1  0.489  0.761  0.763  1.0
  F  F36  1  0.784  0.194  0.681  1.0
  F  F37  1  0.806  0.590  0.348  1.0
  F  F38  1  0.398  0.511  0.248  1.0
  F  F39  1  0.956  0.666  0.755  1.0
  F  F40  1  0.162  0.968  0.888  1.0
  F  F41  1  0.420  0.130  0.185  1.0
  F  F42  1  0.267  0.505  0.886  1.0
  F  F43  1  0.238  0.733  0.220  1.0
  F  F44  1  0.271  0.511  0.096  1.0
  F  F45  1  0.134  0.930  0.521  1.0
  F  F46  1  0.113  0.602  0.581  1.0
  F  F47  1  0.495  0.762  0.553  1.0
[/CIF]
.
The material structure described by Ba2AlSn2F11 crystallizes in the trigonal P3_2 space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 9-coordinate geometry to one F(1), one F(10), one F(11), one F(2), one F(4), one F(6), one F(8), and two equivalent F(5) atoms. In the second Ba site, Ba(2) is bonded in a 8-coordinate geometry to one F(1), one F(10), one F(2), one F(3), one F(4), one F(7), one F(8), and one F(9) atom. Al(1) is bonded in an octahedral geometry to one F(10), one F(11), one F(3), one F(5), one F(7), and one F(9) atom. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 3-coordinate geometry to one F(3), one F(4), one F(5), and one F(6) atom. In the second Sn site, Sn(2) is bonded in a 3-coordinate geometry to one F(1), one F(2), one F(6), and one F(8) atom. There are eleven inequivalent F sites. In the first F site, F(10) is bonded in a distorted single-bond geometry to one Ba(1), one Ba(2), and one Al(1) atom. In the second F site, F(11) is bonded in a distorted single-bond geometry to one Ba(1) and one Al(1) atom. In the third F site, F(1) is bonded in a 3-coordinate geometry to one Ba(1), one Ba(2), and one Sn(2) atom. In the fourth F site, F(2) is bonded in a distorted trigonal non-coplanar geometry to one Ba(1), one Ba(2), and one Sn(2) atom. In the fifth F site, F(3) is bonded in a 3-coordinate geometry to one Ba(2), one Al(1), and one Sn(1) atom. In the sixth F site, F(4) is bonded in a distorted trigonal planar geometry to one Ba(1), one Ba(2), and one Sn(1) atom. In the seventh F site, F(5) is bonded in a 2-coordinate geometry to two equivalent Ba(1), one Al(1), and one Sn(1) atom. In the eighth F site, F(6) is bonded in a 3-coordinate geometry to one Ba(1), one Sn(1), and one Sn(2) atom. In the ninth F site, F(7) is bonded in a distorted single-bond geometry to one Ba(2) and one Al(1) atom. In the tenth F site, F(8) is bonded in a trigonal non-coplanar geometry to one Ba(1), one Ba(2), and one Sn(2) atom. In the eleventh F site, F(9) is bonded in a distorted single-bond geometry to one Ba(2) and one Al(1) atom. is represented by the CIF file [CIF]
data_Ba2AlSn2F11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.828
_cell_length_b   7.828
_cell_length_c   15.500
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   822.468
_cell_formula_units_Z   3
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  0.812  0.852  0.654  1.0
  Ba  Ba1  1  0.481  0.122  0.792  1.0
  Ba  Ba2  1  0.040  0.188  0.987  1.0
  Ba  Ba3  1  0.878  0.359  0.459  1.0
  Ba  Ba4  1  0.641  0.519  0.125  1.0
  Ba  Ba5  1  0.148  0.960  0.321  1.0
  Al  Al6  1  0.521  0.690  0.872  1.0
  Al  Al7  1  0.169  0.479  0.205  1.0
  Al  Al8  1  0.310  0.831  0.538  1.0
  Sn  Sn9  1  0.919  0.669  0.894  1.0
  Sn  Sn10  1  0.072  0.409  0.733  1.0
  Sn  Sn11  1  0.591  0.663  0.400  1.0
  Sn  Sn12  1  0.750  0.081  0.227  1.0
  Sn  Sn13  1  0.337  0.928  0.066  1.0
  Sn  Sn14  1  0.331  0.250  0.560  1.0
  F  F15  1  0.011  0.853  0.056  1.0
  F  F16  1  0.870  0.289  0.851  1.0
  F  F17  1  0.842  0.989  0.389  1.0
  F  F18  1  0.499  0.074  0.489  1.0
  F  F19  1  0.806  0.838  0.221  1.0
  F  F20  1  0.070  0.204  0.188  1.0
  F  F21  1  0.926  0.425  0.156  1.0
  F  F22  1  0.796  0.866  0.855  1.0
  F  F23  1  0.032  0.194  0.554  1.0
  F  F24  1  0.710  0.044  0.089  1.0
  F  F25  1  0.575  0.501  0.823  1.0
  F  F26  1  0.147  0.158  0.722  1.0
  F  F27  1  0.602  0.645  0.974  1.0
  F  F28  1  0.410  0.216  0.014  1.0
  F  F29  1  0.043  0.398  0.308  1.0
  F  F30  1  0.711  0.580  0.518  1.0
  F  F31  1  0.489  0.887  0.915  1.0
  F  F32  1  0.334  0.290  0.422  1.0
  F  F33  1  0.239  0.729  0.430  1.0
  F  F34  1  0.355  0.957  0.641  1.0
  F  F35  1  0.489  0.761  0.763  1.0
  F  F36  1  0.784  0.194  0.681  1.0
  F  F37  1  0.806  0.590  0.348  1.0
  F  F38  1  0.398  0.511  0.248  1.0
  F  F39  1  0.956  0.666  0.755  1.0
  F  F40  1  0.162  0.968  0.888  1.0
  F  F41  1  0.420  0.130  0.185  1.0
  F  F42  1  0.267  0.505  0.886  1.0
  F  F43  1  0.238  0.733  0.220  1.0
  F  F44  1  0.271  0.511  0.096  1.0
  F  F45  1  0.134  0.930  0.521  1.0
  F  F46  1  0.113  0.602  0.581  1.0
  F  F47  1  0.495  0.762  0.553  1.0
[/CIF]
.