Synthesis and structure of layered compounds in the PbTe−Bi2Te3 and PbTe−Sb2Te3 systems
—A number of tetradymite-like layered compounds in the PbTe−Bi2Te3 and PbTe−Sb2Te3 systems were prepared by a vertical Bridgman process, and their crystal structures were investigated by x-ray diffraction using single-crystal cleaved specimens. The atomic positional parameters and bond distances in PbBi4Te7 were determined. In the pseudobinary system PbTe−Sb2Te3, two new compounds were identified, PbSb2Te4 and PbSb4Te7, isostructural with PbBi2Te4 and PbBi4Te7, respectively. The positional parameters, site occupancies, and bond distances in the structure of PbSb2Te4 were determined. The room-temperature thermoelectric power of the grown ingots was measured along their length. All of the Sb compounds studied were found to be p-type, in contrast to the compounds of the PbTe−Bi2Te3 system.
KeywordsCrystal Structure Inorganic Chemistry Bond Distance PbTe Bi2Te3
Unable to display preview. Download preview PDF.
- 1.Kanatzidis, M.G. 2001The Role of Solid State Chemistry in the Discovery of New Thermoelectric MaterialsSemicond. Semimet.695198Google Scholar
- 2.Goldsmid, H.J. 1999Possibilities for Improvement in Thermoelectric RefrigerationProc. 18th Int. Conf. on Thermoelectrics (Baltimore, 1999)IEEEPiscataway531535Google Scholar
- 3.Shelimova, L.E., Konstantinov, P.P., Karpinsky, O.G., et al. 2001X-ray Diffraction Study and Electrical and Thermal Transport Properties of nGeTe · mBi2Te3 Homologous Series CompoundsJ. Alloys Compd.3295062Google Scholar
- 4.Karpinskii, O.G., Shelimova, L.E., Avilov, E.S., et al. 2002X-ray Diffraction Study of Mixed-Layer Compounds in the PbTe−Bi2Te3 SystemNeorg. Mater.382432Inorg. Mater. (Engl. Transl.), vol. 38, no. 1, pp. 17-24Google Scholar
- 5.Golovanova, N.S., Zlomanov, V.P., Tananaeva, O.I. 1983System PbTe−Bi3Te2Izv. Akad. Nauk SSSR, Neorg. Mater.19740743Google Scholar
- 6.Abrikosov, N., Elagina, E.I., Popova, M.A. 1965System PbTe−Sb2Te3Izv. Akad. Nauk SSSR, Neorg. Mater.121512154Google Scholar
- 7.Hirai, T., Takeda, Y., Kurota, K. 1967The Pseudo-Binary V2VI3−IVVI Compounds Systems, Bi2Te3−PbTe, Bi2Te3−SnTe, Sb2Te3−PbTe, Sb2Te3−SnTe, and Bi2Se3−SnSeJ. Less-Common Met.13352356Google Scholar
- 8.Reynolds, R.A. 1967Phase Relations and Thermoelectric Properties of the Alloy Systems SnTe−Bi2Te3 and PbTe−Sb2Te3J. Electrochem. Soc.114526529Google Scholar
- 9.Andrianov, V.I. 1989Structure Refinement with the AREN PackKristallografiya3413871391Google Scholar
- 10.Svechnikova, T.E., Konstantinov, P.P., Alekseeva, G.T. 2000Physical Properties of Bi2Te2.85Se0.15 Single Crystals Doped with Cu, Cd, In, Ge, S, or SeNeorg. Mater.36677681Inorg. Mater. (Engl. Transl.), vol. 36, no. 6, pp. 556-560Google Scholar
- 11.Petrov, I.I., Imamov, R.M. 1969Electron Diffraction Study of PbTe−Bi2Te3 PhasesKristallografiya14699703Google Scholar