BaYb2F8 crystallizes in the monoclinic C2/m space group. Ba(1) is bonded to two equivalent F(2), two equivalent F(3), and eight equivalent F(1) atoms to form face-sharing BaF12 cuboctahedra. Yb(1) is bonded in a 8-coordinate geometry to two equivalent F(2), two equivalent F(3), and four equivalent F(1) atoms. There are three inequivalent F sites. In the first F site, F(1) is bonded in a 4-coordinate geometry to two equivalent Ba(1) and two equivalent Yb(1) atoms. In the second F site, F(2) is bonded in a distorted trigonal non-coplanar geometry to one Ba(1) and two equivalent Yb(1) atoms. In the third F site, F(3) is bonded in a 3-coordinate geometry to one Ba(1) and two equivalent Yb(1) atoms.
BaYb2F8 crystallizes in the monoclinic C2/m space group. Ba(1) is bonded to two equivalent F(2), two equivalent F(3), and eight equivalent F(1) atoms to form face-sharing BaF12 cuboctahedra. Both Ba(1)-F(2) bond lengths are 2.95 Å. Both Ba(1)-F(3) bond lengths are 2.60 Å. There are four shorter (2.81 Å) and four longer (2.83 Å) Ba(1)-F(1) bond lengths. Yb(1) is bonded in a 8-coordinate geometry to two equivalent F(2), two equivalent F(3), and four equivalent F(1) atoms. Both Yb(1)-F(2) bond lengths are 2.35 Å. Both Yb(1)-F(3) bond lengths are 2.19 Å. There are two shorter (2.22 Å) and two longer (2.32 Å) Yb(1)-F(1) bond lengths. There are three inequivalent F sites. In the first F site, F(1) is bonded in a 4-coordinate geometry to two equivalent Ba(1) and two equivalent Yb(1) atoms. In the second F site, F(2) is bonded in a distorted trigonal non-coplanar geometry to one Ba(1) and two equivalent Yb(1) atoms. In the third F site, F(3) is bonded in a 3-coordinate geometry to one Ba(1) and two equivalent Yb(1) atoms.