SYNTHESIS AND CHARACTERIZATION OF THE LAMELLAR OXYCHLORIDE CO2CU4TE4O11CL4

Abstract

In this work we describe the synthesis and characterization of the Co2Cu4Te4O11Cl4 phase prepared by the hydrothermal technique. From the polycrystalline X-ray diffraction pattern the obtained new phase was indexed in the P-1 space group with cell parameters a= 9.274(7), b= 12.132(2), c= 9.252(2) Å, α= 98.18(14), β= 108.22(13) and γ= 111.07(8) º. The nominal composition and morphology were obtained using SEM-EDX measurements. The optical band gap of the material corresponds to an insulating system with 2.7 eV, and the thermogravimetric data shows that the phase is stable up to 700 ºC.