CsNH4F2 crystallizes in the orthorhombic Pnma space group. Cs(1) is bonded in a 7-coordinate geometry to three equivalent F(2) and four equivalent F(1) atoms. N(1) is bonded in a tetrahedral geometry to one H(1), one H(3), and two equivalent H(2) atoms. There are three inequivalent H sites. In the first H site, H(1) is bonded in a distorted single-bond geometry to one N(1) and one F(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one N(1) atom. In the third H site, H(3) is bonded in a single-bond geometry to one N(1) atom. There are two inequivalent F sites. In the first F site, F(1) is bonded in a 1-coordinate geometry to four equivalent Cs(1) and one H(1) atom. In the second F site, F(2) is bonded in a 5-coordinate geometry to three equivalent Cs(1) atoms.
CsNH4F2 crystallizes in the orthorhombic Pnma space group. Cs(1) is bonded in a 7-coordinate geometry to three equivalent F(2) and four equivalent F(1) atoms. There are two shorter (3.10 Å) and one longer (3.24 Å) Cs(1)-F(2) bond length. There are two shorter (3.13 Å) and two longer (3.19 Å) Cs(1)-F(1) bond lengths. N(1) is bonded in a tetrahedral geometry to one H(1), one H(3), and two equivalent H(2) atoms. The N(1)-H(1) bond length is 1.06 Å. The N(1)-H(3) bond length is 1.04 Å. Both N(1)-H(2) bond lengths are 1.06 Å. There are three inequivalent H sites. In the first H site, H(1) is bonded in a distorted single-bond geometry to one N(1) and one F(1) atom. The H(1)-F(1) bond length is 1.58 Å. In the second H site, H(2) is bonded in a single-bond geometry to one N(1) atom. In the third H site, H(3) is bonded in a single-bond geometry to one N(1) atom. There are two inequivalent F sites. In the first F site, F(1) is bonded in a 1-coordinate geometry to four equivalent Cs(1) and one H(1) atom. In the second F site, F(2) is bonded in a 5-coordinate geometry to three equivalent Cs(1) atoms.