Na2UF6 is Fluorite-derived structured and crystallizes in the orthorhombic Immm space group. Na(1) is bonded in a body-centered cubic geometry to two equivalent F(2) and six equivalent F(1) atoms. U(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(2) is bonded to two equivalent Na(1) and two equivalent U(1) atoms to form FNa2U2 tetrahedra that share corners with four equivalent F(2)Na2U2 tetrahedra, corners with twelve equivalent F(1)Na3U tetrahedra, edges with two equivalent F(2)Na2U2 tetrahedra, and edges with four equivalent F(1)Na3U tetrahedra. In the second F site, F(1) is bonded to three equivalent Na(1) and one U(1) atom to form FNa3U tetrahedra that share corners with six equivalent F(2)Na2U2 tetrahedra, corners with ten equivalent F(1)Na3U tetrahedra, edges with two equivalent F(2)Na2U2 tetrahedra, and edges with four equivalent F(1)Na3U tetrahedra.
Na2UF6 is Fluorite-derived structured and crystallizes in the orthorhombic Immm space group. Na(1) is bonded in a body-centered cubic geometry to two equivalent F(2) and six equivalent F(1) atoms. Both Na(1)-F(2) bond lengths are 2.40 Å. There are two shorter (2.37 Å) and four longer (2.45 Å) Na(1)-F(1) bond lengths. U(1) is bonded in a body-centered cubic geometry to four equivalent F(1) and four equivalent F(2) atoms. All U(1)-F(1) bond lengths are 2.20 Å. All U(1)-F(2) bond lengths are 2.38 Å. There are two inequivalent F sites. In the first F site, F(2) is bonded to two equivalent Na(1) and two equivalent U(1) atoms to form FNa2U2 tetrahedra that share corners with four equivalent F(2)Na2U2 tetrahedra, corners with twelve equivalent F(1)Na3U tetrahedra, edges with two equivalent F(2)Na2U2 tetrahedra, and edges with four equivalent F(1)Na3U tetrahedra. In the second F site, F(1) is bonded to three equivalent Na(1) and one U(1) atom to form FNa3U tetrahedra that share corners with six equivalent F(2)Na2U2 tetrahedra, corners with ten equivalent F(1)Na3U tetrahedra, edges with two equivalent F(2)Na2U2 tetrahedra, and edges with four equivalent F(1)Na3U tetrahedra.