KH3F4 crystallizes in the trigonal R-3c space group. K(1) is bonded in a body-centered cubic geometry to two equivalent F(2) and six equivalent F(1) atoms. H(1) is bonded in a linear geometry to one F(1) and one F(2) atom. There are two inequivalent F sites. In the first F site, F(1) is bonded in a single-bond geometry to two equivalent K(1) and one H(1) atom. In the second F site, F(2) is bonded in a trigonal planar geometry to two equivalent K(1) and three equivalent H(1) atoms.
KH3F4 crystallizes in the trigonal R-3c space group. K(1) is bonded in a body-centered cubic geometry to two equivalent F(2) and six equivalent F(1) atoms. Both K(1)-F(2) bond lengths are 2.86 Å. All K(1)-F(1) bond lengths are 2.68 Å. H(1) is bonded in a linear geometry to one F(1) and one F(2) atom. The H(1)-F(1) bond length is 0.99 Å. The H(1)-F(2) bond length is 1.41 Å. There are two inequivalent F sites. In the first F site, F(1) is bonded in a single-bond geometry to two equivalent K(1) and one H(1) atom. In the second F site, F(2) is bonded in a trigonal planar geometry to two equivalent K(1) and three equivalent H(1) atoms.