Materials Data on CuPbF6 by Materials Project
CuPbF4F2 crystallizes in the triclinic P-1 space group. The structure is one-dimensional and consists of two hydrofluoric acid molecules and one CuPbF4 ribbon oriented in the (1, 1, 1) direction. In the CuPbF4 ribbon, Cu2+ is bonded in a square co-planar geometry to four F1- atoms. There is two shorter (1.93 Å) and two longer (1.95 Å) Cu–F bond length. Pb4+ is bonded in a linear geometry to two equivalent F1- atoms. Both Pb–F bond lengths are 1.25 Å. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one Cu2+ atom. In the second F1- site, F1- is bonded in a distorted bent 150 degrees geometry to one Cu2+ and one Pb4+ atom.
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