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crystal data
The new compound 7HgI2.Fe(C5H5)2 was prepared by the reaction of solid tetragonal mercuric iodide with ferrocene vapours at 423 K. The product is a dark green powder, stable in air, and decomposes at 463 K. The cubic unit-cell parameters (298 K) are: a = 20.12(2) Å, V = 8157.3 Å3, Z = 8, Mr = 3366.8, Dx = 5.49 Mg m−3; extinctions indicate a face-centered space group. X-ray (Cu Kα radiation) powder diffraction data (50 lines) are reported. The compound has interesting electrical properties. The JCPDS Diffraction File No. for 7HgI2.Fe(C5H5)2 is 35-2000.