Ba2YW2F11 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 7-coordinate geometry to one F(1), one F(11), one F(3), one F(4), one F(5), one F(6), and one F(8) atom. In the second Ba site, Ba(2) is bonded in a 9-coordinate geometry to one F(1), one F(11), one F(2), one F(3), one F(4), one F(5), one F(7), one F(8), and one F(9) atom. Y(1) is bonded to one F(10), one F(11), one F(3), one F(5), one F(6), one F(7), and one F(9) atom to form distorted YF7 pentagonal bipyramids that share  a cornercorner with one W(2)F5 square pyramid and  an edgeedge with one W(2)F5 square pyramid. There are two inequivalent W sites. In the first W site, W(1) is bonded in a 4-coordinate geometry to one F(2), one F(4), one F(7), and one F(9) atom. In the second W site, W(2) is bonded to one F(1), one F(10), one F(6), one F(8), and one F(9) atom to form distorted WF5 square pyramids that share  a cornercorner with one Y(1)F7 pentagonal bipyramid and  an edgeedge with one Y(1)F7 pentagonal bipyramid. There are eleven inequivalent F sites. In the first F site, F(10) is bonded in a water-like geometry to one Y(1) and one W(2) atom. In the second F site, F(11) is bonded in a 3-coordinate geometry to one Ba(1), one Ba(2), and one Y(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 W(2) atom. In the fourth F site, F(2) is bonded in a bent 120 degrees geometry to one Ba(2) and one W(1) atom. In the fifth F site, F(3) is bonded in a 3-coordinate geometry to one Ba(1), one Ba(2), and one Y(1) atom. In the sixth F site, F(4) is bonded in a 1-coordinate geometry to one Ba(1), one Ba(2), and one W(1) atom. In the seventh F site, F(5) is bonded in a 2-coordinate geometry to one Ba(1), one Ba(2), and one Y(1) atom. In the eighth F site, F(6) is bonded in a distorted trigonal non-coplanar geometry to one Ba(1), one Y(1), and one W(2) atom. In the ninth F site, F(7) is bonded in a 3-coordinate geometry to one Ba(2), one Y(1), and one W(1) atom. In the tenth F site, F(8) is bonded in a 3-coordinate geometry to one Ba(1), one Ba(2), and one W(2) atom. In the eleventh F site, F(9) is bonded in a distorted tetrahedral geometry to one Ba(2), one Y(1), one W(1), and one W(2) atom.
Ba2YW2F11 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 7-coordinate geometry to one F(1), one F(11), one F(3), one F(4), one F(5), one F(6), and one F(8) atom. The Ba(1)-F(1) bond length is 2.74 Å. The Ba(1)-F(11) bond length is 2.69 Å. The Ba(1)-F(3) bond length is 2.85 Å. The Ba(1)-F(4) bond length is 2.92 Å. The Ba(1)-F(5) bond length is 2.68 Å. The Ba(1)-F(6) bond length is 2.71 Å. The Ba(1)-F(8) bond length is 2.97 Å. In the second Ba site, Ba(2) is bonded in a 9-coordinate geometry to one F(1), one F(11), one F(2), one F(3), one F(4), one F(5), one F(7), one F(8), and one F(9) atom. The Ba(2)-F(1) bond length is 3.00 Å. The Ba(2)-F(11) bond length is 2.85 Å. The Ba(2)-F(2) bond length is 2.77 Å. The Ba(2)-F(3) bond length is 2.70 Å. The Ba(2)-F(4) bond length is 2.92 Å. The Ba(2)-F(5) bond length is 3.27 Å. The Ba(2)-F(7) bond length is 2.75 Å. The Ba(2)-F(8) bond length is 2.80 Å. The Ba(2)-F(9) bond length is 3.07 Å. Y(1) is bonded to one F(10), one F(11), one F(3), one F(5), one F(6), one F(7), and one F(9) atom to form distorted YF7 pentagonal bipyramids that share  a cornercorner with one W(2)F5 square pyramid and  an edgeedge with one W(2)F5 square pyramid. The Y(1)-F(10) bond length is 2.37 Å. The Y(1)-F(11) bond length is 2.19 Å. The Y(1)-F(3) bond length is 2.22 Å. The Y(1)-F(5) bond length is 2.16 Å. The Y(1)-F(6) bond length is 2.39 Å. The Y(1)-F(7) bond length is 2.23 Å. The Y(1)-F(9) bond length is 2.33 Å. There are two inequivalent W sites. In the first W site, W(1) is bonded in a 4-coordinate geometry to one F(2), one F(4), one F(7), and one F(9) atom. The W(1)-F(2) bond length is 2.03 Å. The W(1)-F(4) bond length is 2.11 Å. The W(1)-F(7) bond length is 2.43 Å. The W(1)-F(9) bond length is 2.21 Å. In the second W site, W(2) is bonded to one F(1), one F(10), one F(6), one F(8), and one F(9) atom to form distorted WF5 square pyramids that share  a cornercorner with one Y(1)F7 pentagonal bipyramid and  an edgeedge with one Y(1)F7 pentagonal bipyramid. The W(2)-F(1) bond length is 2.14 Å. The W(2)-F(10) bond length is 2.16 Å. The W(2)-F(6) bond length is 2.14 Å. The W(2)-F(8) bond length is 2.10 Å. The W(2)-F(9) bond length is 2.36 Å. There are eleven inequivalent F sites. In the first F site, F(10) is bonded in a water-like geometry to one Y(1) and one W(2) atom. In the second F site, F(11) is bonded in a 3-coordinate geometry to one Ba(1), one Ba(2), and one Y(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 W(2) atom. In the fourth F site, F(2) is bonded in a bent 120 degrees geometry to one Ba(2) and one W(1) atom. In the fifth F site, F(3) is bonded in a 3-coordinate geometry to one Ba(1), one Ba(2), and one Y(1) atom. In the sixth F site, F(4) is bonded in a 1-coordinate geometry to one Ba(1), one Ba(2), and one W(1) atom. In the seventh F site, F(5) is bonded in a 2-coordinate geometry to one Ba(1), one Ba(2), and one Y(1) atom. In the eighth F site, F(6) is bonded in a distorted trigonal non-coplanar geometry to one Ba(1), one Y(1), and one W(2) atom. In the ninth F site, F(7) is bonded in a 3-coordinate geometry to one Ba(2), one Y(1), and one W(1) atom. In the tenth F site, F(8) is bonded in a 3-coordinate geometry to one Ba(1), one Ba(2), and one W(2) atom. In the eleventh F site, F(9) is bonded in a distorted tetrahedral geometry to one Ba(2), one Y(1), one W(1), and one W(2) atom.