Mid-IR and Raman Spectral Properties of Clinoatacamite-Structure Basic Copper Chlorides
Basic copper chloride Cu2(OH)3Cl and Cu2(OD)3Cl polycrystalline sample were successfully synthesized in the same single phase of clinoatacamite-structure, and the latter’s mid-infrared absorption spectra (4000-400cm–1) and Raman spectra (4000-95cm–1) were first, to the best of our knowledge, measured respectively by FTIR spectroscopy and Micro-Raman spectroscopy to study the corresponding relationship between their spectral properties and crystal structure. Through the comparative analysis of the four spectra we definitely assign or tentatively suggest the vibration modes of OH/D groups in the trimeric hydrogen bond environment, (H/DO)–Cu–(OH/D), Cl–Cu–Cl. These results can be propitious to their low temperature spectral properties which must help to understand the underlying physics of their exotic geometric frustration phenomenon.
Sihai Jiao, Zhengyi Jiang and Jinglong Bu
X. D. Liu et al., "Mid-IR and Raman Spectral Properties of Clinoatacamite-Structure Basic Copper Chlorides", Advanced Materials Research, Vols. 146-147, pp. 1202-1205, 2011