Ba2PrF7 crystallizes in the triclinic P1 space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 10-coordinate geometry to one F(6), two equivalent F(2), two equivalent F(3), two equivalent F(5), and three equivalent F(4) atoms. In the second Ba site, Ba(2) is bonded in a body-centered cubic geometry to two equivalent F(1), two equivalent F(2), two equivalent F(3), and two equivalent F(7) atoms. Pr(1) is bonded to one F(1), one F(4), one F(7), two equivalent F(5), and two equivalent F(6) atoms to form distorted corner-sharing PrF7 pentagonal bipyramids. There are seven inequivalent F sites. In the first F site, F(1) is bonded in a trigonal non-coplanar geometry to two equivalent Ba(2) and one Pr(1) atom. In the second F site, F(2) is bonded to two equivalent Ba(1) and two equivalent Ba(2) atoms to form a mixture of corner and edge-sharing FBa4 tetrahedra. In the third F site, F(3) is bonded to two equivalent Ba(1) and two equivalent Ba(2) atoms to form a mixture of corner and edge-sharing FBa4 tetrahedra. In the fourth F site, F(4) is bonded in a 1-coordinate geometry to three equivalent Ba(1) and one Pr(1) atom. In the fifth F site, F(5) is bonded in a 4-coordinate geometry to two equivalent Ba(1) and two equivalent Pr(1) atoms. In the sixth F site, F(6) is bonded in a 3-coordinate geometry to one Ba(1) and two equivalent Pr(1) atoms. In the seventh F site, F(7) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Ba(2) and one Pr(1) atom.
Ba2PrF7 crystallizes in the triclinic P1 space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 10-coordinate geometry to one F(6), two equivalent F(2), two equivalent F(3), two equivalent F(5), and three equivalent F(4) atoms. The Ba(1)-F(6) bond length is 2.78 Å. There is one shorter (2.68 Å) and one longer (2.76 Å) Ba(1)-F(2) bond length. There is one shorter (2.68 Å) and one longer (2.73 Å) Ba(1)-F(3) bond length. There is one shorter (2.99 Å) and one longer (3.19 Å) Ba(1)-F(5) bond length. There are a spread of Ba(1)-F(4) bond distances ranging from 2.90-3.19 Å. In the second Ba site, Ba(2) is bonded in a body-centered cubic geometry to two equivalent F(1), two equivalent F(2), two equivalent F(3), and two equivalent F(7) atoms. There is one shorter (2.69 Å) and one longer (2.76 Å) Ba(2)-F(1) bond length. There is one shorter (2.65 Å) and one longer (2.66 Å) Ba(2)-F(2) bond length. There is one shorter (2.66 Å) and one longer (2.67 Å) Ba(2)-F(3) bond length. There is one shorter (2.76 Å) and one longer (2.83 Å) Ba(2)-F(7) bond length. Pr(1) is bonded to one F(1), one F(4), one F(7), two equivalent F(5), and two equivalent F(6) atoms to form distorted corner-sharing PrF7 pentagonal bipyramids. The Pr(1)-F(1) bond length is 2.37 Å. The Pr(1)-F(4) bond length is 2.40 Å. The Pr(1)-F(7) bond length is 2.39 Å. There is one shorter (2.35 Å) and one longer (2.38 Å) Pr(1)-F(5) bond length. There is one shorter (2.35 Å) and one longer (2.37 Å) Pr(1)-F(6) bond length. There are seven inequivalent F sites. In the first F site, F(1) is bonded in a trigonal non-coplanar geometry to two equivalent Ba(2) and one Pr(1) atom. In the second F site, F(2) is bonded to two equivalent Ba(1) and two equivalent Ba(2) atoms to form a mixture of corner and edge-sharing FBa4 tetrahedra. In the third F site, F(3) is bonded to two equivalent Ba(1) and two equivalent Ba(2) atoms to form a mixture of corner and edge-sharing FBa4 tetrahedra. In the fourth F site, F(4) is bonded in a 1-coordinate geometry to three equivalent Ba(1) and one Pr(1) atom. In the fifth F site, F(5) is bonded in a 4-coordinate geometry to two equivalent Ba(1) and two equivalent Pr(1) atoms. In the sixth F site, F(6) is bonded in a 3-coordinate geometry to one Ba(1) and two equivalent Pr(1) atoms. In the seventh F site, F(7) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Ba(2) and one Pr(1) atom.