K2SrBe2F8 crystallizes in the trigonal R-3m space group. K(1) is bonded in a 10-coordinate geometry to one F(2) and nine equivalent F(1) atoms. Sr(1) is bonded in a 6-coordinate geometry to six equivalent F(1) atoms. Be(1) is bonded in a tetrahedral geometry to one F(2) and three equivalent F(1) atoms. There are two inequivalent F sites. In the first F site, F(1) is bonded in a distorted single-bond geometry to three equivalent K(1), one Sr(1), and one Be(1) atom. In the second F site, F(2) is bonded in a distorted single-bond geometry to one K(1) and one Be(1) atom.
K2SrBe2F8 crystallizes in the trigonal R-3m space group. K(1) is bonded in a 10-coordinate geometry to one F(2) and nine equivalent F(1) atoms. The K(1)-F(2) bond length is 2.58 Å. There are three shorter (2.83 Å) and six longer (2.86 Å) K(1)-F(1) bond lengths. Sr(1) is bonded in a 6-coordinate geometry to six equivalent F(1) atoms. All Sr(1)-F(1) bond lengths are 2.55 Å. Be(1) is bonded in a tetrahedral geometry to one F(2) and three equivalent F(1) atoms. The Be(1)-F(2) bond length is 1.55 Å. All Be(1)-F(1) bond lengths are 1.57 Å. There are two inequivalent F sites. In the first F site, F(1) is bonded in a distorted single-bond geometry to three equivalent K(1), one Sr(1), and one Be(1) atom. In the second F site, F(2) is bonded in a distorted single-bond geometry to one K(1) and one Be(1) atom.