The compound described by Ba2Zn7F18 crystallizes in the triclinic P-1 space group. Ba(1) is bonded to one F(2), one F(6), one F(8), one F(9), two equivalent F(1), two equivalent F(3), two equivalent F(4), and two equivalent F(7) atoms to form BaF12 cuboctahedra that share  a cornercorner with one Zn(3)F6 octahedra, corners with two equivalent Zn(1)F6 octahedra, corners with two equivalent Zn(2)F6 octahedra, corners with two equivalent Zn(4)F6 octahedra, edges with two equivalent Ba(1)F12 cuboctahedra,  an edgeedge with one Zn(1)F6 octahedra,  an edgeedge with one Zn(2)F6 octahedra,  an edgeedge with one Zn(3)F6 octahedra, edges with two equivalent Zn(4)F6 octahedra,  a faceface with one Ba(1)F12 cuboctahedra,  a faceface with one Zn(2)F6 octahedra, and faces with two equivalent Zn(3)F6 octahedra. The corner-sharing octahedral tilt angles range from 28-54°. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent F(3), two equivalent F(4), and two equivalent F(5) atoms to form ZnF6 octahedra that share corners with four equivalent Ba(1)F12 cuboctahedra, corners with two equivalent Zn(3)F6 octahedra, corners with two equivalent Zn(4)F6 octahedra, edges with two equivalent Ba(1)F12 cuboctahedra, and edges with two equivalent Zn(2)F6 octahedra. The corner-sharing octahedral tilt angles are 54°. In the second Zn site, Zn(2) is bonded to one F(2), one F(3), one F(5), one F(6), one F(7), and one F(8) atom to form ZnF6 octahedra that share corners with two equivalent Ba(1)F12 cuboctahedra, corners with three equivalent Zn(3)F6 octahedra, corners with three equivalent Zn(4)F6 octahedra,  an edgeedge with one Ba(1)F12 cuboctahedra,  an edgeedge with one Zn(1)F6 octahedra, and  a faceface with one Ba(1)F12 cuboctahedra. The corner-sharing octahedral tilt angles range from 45-57°. In the third Zn site, Zn(3) is bonded to one F(1), one F(2), one F(4), one F(6), one F(7), and one F(9) atom to form ZnF6 octahedra that share  a cornercorner with one Ba(1)F12 cuboctahedra,  a cornercorner with one Zn(1)F6 octahedra, corners with three equivalent Zn(2)F6 octahedra,  an edgeedge with one Ba(1)F12 cuboctahedra, edges with two equivalent Zn(4)F6 octahedra, and faces with two equivalent Ba(1)F12 cuboctahedra. The corner-sharing octahedral tilt angles range from 51-56°. In the fourth Zn site, Zn(4) is bonded to one F(1), one F(5), one F(6), one F(8), and two equivalent F(9) atoms to form ZnF6 octahedra that share corners with two equivalent Ba(1)F12 cuboctahedra,  a cornercorner with one Zn(1)F6 octahedra, corners with three equivalent Zn(2)F6 octahedra, edges with two equivalent Ba(1)F12 cuboctahedra,  an edgeedge with one Zn(4)F6 octahedra, and edges with two equivalent Zn(3)F6 octahedra. The corner-sharing octahedral tilt angles range from 45-57°. There are nine inequivalent F sites. In the first F site, F(1) is bonded in a 4-coordinate geometry to two equivalent Ba(1), one Zn(3), and one Zn(4) atom. In the second F site, F(2) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Zn(2), and one Zn(3) atom. In the third F site, F(3) is bonded in a 4-coordinate geometry to two equivalent Ba(1), one Zn(1), and one Zn(2) atom. In the fourth F site, F(4) is bonded in a distorted bent 120 degrees geometry to two equivalent Ba(1), one Zn(1), and one Zn(3) atom. In the fifth F site, F(5) is bonded in a distorted trigonal planar geometry to one Zn(1), one Zn(2), and one Zn(4) atom. In the sixth F site, F(6) is bonded in a 3-coordinate geometry to one Ba(1), one Zn(2), one Zn(3), and one Zn(4) atom. In the seventh F site, F(7) is bonded in a distorted bent 120 degrees geometry to two equivalent Ba(1), one Zn(2), and one Zn(3) atom. In the eighth F site, F(8) is bonded in a 3-coordinate geometry to one Ba(1), one Zn(2), and one Zn(4) atom. In the ninth F site, F(9) is bonded in a 3-coordinate geometry to one Ba(1), one Zn(3), and two equivalent Zn(4) atoms. is represented by the CIF file [CIF]
data_Ba2Zn7F18
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.029
_cell_length_b   7.306
_cell_length_c   7.504
_cell_angle_alpha   94.217
_cell_angle_beta   92.952
_cell_angle_gamma   116.292
_symmetry_Int_Tables_number   1
_cell_volume   342.995
_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  0.315  0.688  0.632  1.0
  Ba  Ba1  1  0.685  0.312  0.368  1.0
  Zn  Zn2  1  0.000  0.000  0.500  1.0
  Zn  Zn3  1  0.192  0.871  0.179  1.0
  Zn  Zn4  1  0.808  0.129  0.821  1.0
  Zn  Zn5  1  0.821  0.620  0.806  1.0
  Zn  Zn6  1  0.179  0.380  0.194  1.0
  Zn  Zn7  1  0.609  0.731  0.123  1.0
  Zn  Zn8  1  0.391  0.269  0.877  1.0
  F  F9  1  0.480  0.561  0.323  1.0
  F  F10  1  0.520  0.439  0.677  1.0
  F  F11  1  0.111  0.772  0.925  1.0
  F  F12  1  0.889  0.228  0.075  1.0
  F  F13  1  0.716  0.990  0.556  1.0
  F  F14  1  0.284  0.010  0.444  1.0
  F  F15  1  0.921  0.718  0.571  1.0
  F  F16  1  0.079  0.282  0.429  1.0
  F  F17  1  0.907  0.872  0.237  1.0
  F  F18  1  0.093  0.128  0.763  1.0
  F  F19  1  0.702  0.824  0.878  1.0
  F  F20  1  0.298  0.176  0.122  1.0
  F  F21  1  0.102  0.605  0.285  1.0
  F  F22  1  0.898  0.395  0.715  1.0
  F  F23  1  0.499  0.927  0.185  1.0
  F  F24  1  0.501  0.073  0.815  1.0
  F  F25  1  0.680  0.487  0.027  1.0
  F  F26  1  0.320  0.513  0.973  1.0
[/CIF]
.
The compound described by Ba2Zn7F18 crystallizes in the triclinic P-1 space group. Ba(1) is bonded to one F(2), one F(6), one F(8), one F(9), two equivalent F(1), two equivalent F(3), two equivalent F(4), and two equivalent F(7) atoms to form BaF12 cuboctahedra that share  a cornercorner with one Zn(3)F6 octahedra, corners with two equivalent Zn(1)F6 octahedra, corners with two equivalent Zn(2)F6 octahedra, corners with two equivalent Zn(4)F6 octahedra, edges with two equivalent Ba(1)F12 cuboctahedra,  an edgeedge with one Zn(1)F6 octahedra,  an edgeedge with one Zn(2)F6 octahedra,  an edgeedge with one Zn(3)F6 octahedra, edges with two equivalent Zn(4)F6 octahedra,  a faceface with one Ba(1)F12 cuboctahedra,  a faceface with one Zn(2)F6 octahedra, and faces with two equivalent Zn(3)F6 octahedra. The corner-sharing octahedral tilt angles range from 28-54°. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent F(3), two equivalent F(4), and two equivalent F(5) atoms to form ZnF6 octahedra that share corners with four equivalent Ba(1)F12 cuboctahedra, corners with two equivalent Zn(3)F6 octahedra, corners with two equivalent Zn(4)F6 octahedra, edges with two equivalent Ba(1)F12 cuboctahedra, and edges with two equivalent Zn(2)F6 octahedra. The corner-sharing octahedral tilt angles are 54°. In the second Zn site, Zn(2) is bonded to one F(2), one F(3), one F(5), one F(6), one F(7), and one F(8) atom to form ZnF6 octahedra that share corners with two equivalent Ba(1)F12 cuboctahedra, corners with three equivalent Zn(3)F6 octahedra, corners with three equivalent Zn(4)F6 octahedra,  an edgeedge with one Ba(1)F12 cuboctahedra,  an edgeedge with one Zn(1)F6 octahedra, and  a faceface with one Ba(1)F12 cuboctahedra. The corner-sharing octahedral tilt angles range from 45-57°. In the third Zn site, Zn(3) is bonded to one F(1), one F(2), one F(4), one F(6), one F(7), and one F(9) atom to form ZnF6 octahedra that share  a cornercorner with one Ba(1)F12 cuboctahedra,  a cornercorner with one Zn(1)F6 octahedra, corners with three equivalent Zn(2)F6 octahedra,  an edgeedge with one Ba(1)F12 cuboctahedra, edges with two equivalent Zn(4)F6 octahedra, and faces with two equivalent Ba(1)F12 cuboctahedra. The corner-sharing octahedral tilt angles range from 51-56°. In the fourth Zn site, Zn(4) is bonded to one F(1), one F(5), one F(6), one F(8), and two equivalent F(9) atoms to form ZnF6 octahedra that share corners with two equivalent Ba(1)F12 cuboctahedra,  a cornercorner with one Zn(1)F6 octahedra, corners with three equivalent Zn(2)F6 octahedra, edges with two equivalent Ba(1)F12 cuboctahedra,  an edgeedge with one Zn(4)F6 octahedra, and edges with two equivalent Zn(3)F6 octahedra. The corner-sharing octahedral tilt angles range from 45-57°. There are nine inequivalent F sites. In the first F site, F(1) is bonded in a 4-coordinate geometry to two equivalent Ba(1), one Zn(3), and one Zn(4) atom. In the second F site, F(2) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Zn(2), and one Zn(3) atom. In the third F site, F(3) is bonded in a 4-coordinate geometry to two equivalent Ba(1), one Zn(1), and one Zn(2) atom. In the fourth F site, F(4) is bonded in a distorted bent 120 degrees geometry to two equivalent Ba(1), one Zn(1), and one Zn(3) atom. In the fifth F site, F(5) is bonded in a distorted trigonal planar geometry to one Zn(1), one Zn(2), and one Zn(4) atom. In the sixth F site, F(6) is bonded in a 3-coordinate geometry to one Ba(1), one Zn(2), one Zn(3), and one Zn(4) atom. In the seventh F site, F(7) is bonded in a distorted bent 120 degrees geometry to two equivalent Ba(1), one Zn(2), and one Zn(3) atom. In the eighth F site, F(8) is bonded in a 3-coordinate geometry to one Ba(1), one Zn(2), and one Zn(4) atom. In the ninth F site, F(9) is bonded in a 3-coordinate geometry to one Ba(1), one Zn(3), and two equivalent Zn(4) atoms. is represented by the CIF file [CIF]
data_Ba2Zn7F18
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.029
_cell_length_b   7.306
_cell_length_c   7.504
_cell_angle_alpha   94.217
_cell_angle_beta   92.952
_cell_angle_gamma   116.292
_symmetry_Int_Tables_number   1
_cell_volume   342.995
_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  0.315  0.688  0.632  1.0
  Ba  Ba1  1  0.685  0.312  0.368  1.0
  Zn  Zn2  1  0.000  0.000  0.500  1.0
  Zn  Zn3  1  0.192  0.871  0.179  1.0
  Zn  Zn4  1  0.808  0.129  0.821  1.0
  Zn  Zn5  1  0.821  0.620  0.806  1.0
  Zn  Zn6  1  0.179  0.380  0.194  1.0
  Zn  Zn7  1  0.609  0.731  0.123  1.0
  Zn  Zn8  1  0.391  0.269  0.877  1.0
  F  F9  1  0.480  0.561  0.323  1.0
  F  F10  1  0.520  0.439  0.677  1.0
  F  F11  1  0.111  0.772  0.925  1.0
  F  F12  1  0.889  0.228  0.075  1.0
  F  F13  1  0.716  0.990  0.556  1.0
  F  F14  1  0.284  0.010  0.444  1.0
  F  F15  1  0.921  0.718  0.571  1.0
  F  F16  1  0.079  0.282  0.429  1.0
  F  F17  1  0.907  0.872  0.237  1.0
  F  F18  1  0.093  0.128  0.763  1.0
  F  F19  1  0.702  0.824  0.878  1.0
  F  F20  1  0.298  0.176  0.122  1.0
  F  F21  1  0.102  0.605  0.285  1.0
  F  F22  1  0.898  0.395  0.715  1.0
  F  F23  1  0.499  0.927  0.185  1.0
  F  F24  1  0.501  0.073  0.815  1.0
  F  F25  1  0.680  0.487  0.027  1.0
  F  F26  1  0.320  0.513  0.973  1.0
[/CIF]
.