Sr2PrF6 is Fluorite-derived structured and crystallizes in the orthorhombic Immm space group. Sr(1) is bonded in a body-centered cubic geometry to two equivalent F(1) and six equivalent F(2) atoms. Pr(1) is bonded in a body-centered cubic geometry to four equivalent F(1) and four equivalent F(2) atoms. There are two inequivalent F sites. In the first F site, F(1) is bonded to two equivalent Sr(1) and two equivalent Pr(1) atoms to form FSr2Pr2 tetrahedra that share corners with four equivalent F(1)Sr2Pr2 tetrahedra, corners with twelve equivalent F(2)Sr3Pr tetrahedra, edges with two equivalent F(1)Sr2Pr2 tetrahedra, and edges with four equivalent F(2)Sr3Pr tetrahedra. In the second F site, F(2) is bonded to three equivalent Sr(1) and one Pr(1) atom to form FSr3Pr tetrahedra that share corners with six equivalent F(1)Sr2Pr2 tetrahedra, corners with ten equivalent F(2)Sr3Pr tetrahedra, edges with two equivalent F(1)Sr2Pr2 tetrahedra, and edges with four equivalent F(2)Sr3Pr tetrahedra.
Sr2PrF6 is Fluorite-derived structured and crystallizes in the orthorhombic Immm space group. Sr(1) is bonded in a body-centered cubic geometry to two equivalent F(1) and six equivalent F(2) atoms. Both Sr(1)-F(1) bond lengths are 2.55 Å. There are four shorter (2.52 Å) and two longer (2.57 Å) Sr(1)-F(2) bond lengths. Pr(1) is bonded in a body-centered cubic geometry to four equivalent F(1) and four equivalent F(2) atoms. All Pr(1)-F(1) bond lengths are 2.58 Å. All Pr(1)-F(2) bond lengths are 2.52 Å. There are two inequivalent F sites. In the first F site, F(1) is bonded to two equivalent Sr(1) and two equivalent Pr(1) atoms to form FSr2Pr2 tetrahedra that share corners with four equivalent F(1)Sr2Pr2 tetrahedra, corners with twelve equivalent F(2)Sr3Pr tetrahedra, edges with two equivalent F(1)Sr2Pr2 tetrahedra, and edges with four equivalent F(2)Sr3Pr tetrahedra. In the second F site, F(2) is bonded to three equivalent Sr(1) and one Pr(1) atom to form FSr3Pr tetrahedra that share corners with six equivalent F(1)Sr2Pr2 tetrahedra, corners with ten equivalent F(2)Sr3Pr tetrahedra, edges with two equivalent F(1)Sr2Pr2 tetrahedra, and edges with four equivalent F(2)Sr3Pr tetrahedra.