ic9804521_si_001.cif (13.19 kB)
CuClCu2TeS3: Synthesis, Structure Determination, and Raman Spectroscopic Characterization of a New Zincblende Derivative†
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posted on 1998-09-12, 00:00 authored by A. PfitznerPure black CuClCu2TeS3 was prepared by reaction of stoichiometric amounts of CuCl, Cu, Te, and S in evacuated
silica ampules. The crystal structure was determined from single crystals at room temperature. The compound
crystallizes in the rhombohedral system, space group R3m with a = 7.361(1) Å and c = 10.401(1) Å (hexagonal
setting), and Z = 3. Structural considerations and group-subgroup relationships show that CuClCu2TeS3 can be
regarded as a new ordered zincblende derivative. In this material copper and sulfur are four-coordinate. By
contrast tellurium has a trigonal pyramidal coordination and chlorine is located in a trigonal planar surrounding.
Raman spectra are dominated by stretching modes of thiometalate ions [TeS3]2- at νasym = 359 cm-1 and νsym =
336 cm-1, respectively. DTA measurements reveal a peritectic decomposition of CuClCu2TeS3 at 448 °C.
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ν asym336 cmTeS 3Raman spectraNew Zincblende3. Structural considerationsperitectic decompositionRaman Spectroscopic CharacterizationDTA measurementsrhombohedral systemStructure Determinationmaterial copperν symcompound crystallizesspace group R 3 mthiometalate ionscrystal structurestoichiometric amountsCuClCu 2 TeS 3contrast tellurium359 cmsilica ampulesroom temperature