ChemInform Abstract: Synthesis and Thermal Conductivities of ZnIn₂Te₄ and CdIn₂Te₄ with Defect‐Chalcopyrite Structure.

Abstract

Structure. -The title compounds are prepared by solid state reactions of stoichiometric mixtures of Zn or Cd, In2Te3, and Te (sealed silica tubes, 1053-1173 K, 3 d). The compounds have a defect-chalcopyrite tetragonal structure with vacancies (powder XRD). Thermal conductivity measurements are performed in the temperature range from room temperature to 850 K. The lattice thermal conductivities are compared with those of Zn-and Cd chalcopyrite compounds with no vacancies, revealing that the vacancies in the defect-chalcopyrite compounds are not responsible for the reduction of the lattice thermal conductivity. It is concluded that the presence of vacancies alone in the defect-chalcopyrite structure does not result in effective phonon scattering. -(SURIWONG, T.; KUROSAKI*, K.; THONGTEM, S.; HARNWUNGGMOUNG, A.; PLIRDPRING, T.; SUGAHARA, T.; OHISHI, Y.; MUTA, H.; YAMANAKA, S.; J. Alloys Compd. 509 (2011) 27, 7484-7487, http://dx.