Materials Data on K2FeCuC12 by Materials Project
(K)2FeCuC12 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional and consists of eight potassium molecules and one FeCuC12 framework. In the FeCuC12 framework, Fe3+ is bonded in an octahedral geometry to six equivalent C+0.50- atoms. All Fe–C bond lengths are 1.91 Å. Cu1+ is bonded in an octahedral geometry to six equivalent C+0.50- atoms. All Cu–C bond lengths are 1.90 Å. There are two inequivalent C+0.50- sites. In the first C+0.50- site, C+0.50- is bonded in a linear geometry to one Fe3+ and one C+0.50- atom. The C–C bond length is 1.24 Å. In the second C+0.50- site, C+0.50- is bonded in a linear geometry to one Cu1+ and one C+0.50- atom.
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