Abstract
The effect of pressure on the Raman modes in TeO2 (paratellurite) has been investigated to 30GPa, using the diamond cell and argon as pressure medium. The pressure dependence of the Raman modes indicates four pressure-induced phase transitions near 1 GPa, 4.5 GPa, 11 GPa and 22 GPa. Of these the first is the well studied second-order transition fromD 44 symmetry toD 42 symmetry, driven by a soft acoustic shear mode instability. The remarkable similarity in the Raman spectra of phases I to IV suggest that only subtle changes in the structure are involved in these phase transitions. The totally different Raman spectral features of phase V indicate major structural changes at the 22GPa transition. It is suggested that this high pressure-phase is similar to PbCl2-type, from high pressure crystal chemical considerations. The need for a high pressure X-ray diffraction study on TeO2 is emphasized, to unravel the structure of the various high pressure phases in the system.
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References
Adams D M and Sharma S K 1978J. Phys. Chem. Solids 39 515
Ayrault B 1972Solid State Commun. 11 639
Barnett J D, Block S and Piermarini G J 1973Rev. Sci. Instrum. 44 1
Block S, da Jornada J A H and Piermarini G J 1985J. Am. Ceram. Soc. 68 497
Duclos S J, Vohra Y K, Ruoff A L, Jayaraman A and Epinosa G P 1988Phys. Rev. B38 7755
Durand M, Ayrault B, Marqueton Y and Decamps E A 1976Phys. Status Solidi L78 767
Jayaraman A 1983Rev. Mod. Phys. 55 65
Kabalkina S, Vereschagin L F and Kotilevets A 1967Sov. Phys. JETP 24 251
Kourouklis G A, Jayaraman A and Epinosa G P 1988Phys. Rev. B37 4250
Leciejewicz J 1961Z. Kristallogr. 116 345
Lindquist O 1968Acta Chemica. Scand. Ser. A22 977
Liu L G 1974Phys. Earth Planet. Interiors 9 338
Liu L G 1980aEarth Planet. Sci. Lett 49 166
Liu L G 1980bJ. Phys. Chem. Solids 4 331
Liu L G 1987J. Phys. Chem. Solids 48 719
Mammone J F and Sharma S K 1979 in Carnegie Instituting of Washington Yearbook79 667
Ming L C and Manghnani M H 1982 inHigh pressure research in geophysics, (eds) S Akhimoto and M H Manghanani p. 329 (Tokyo: Center Academic Publications)
Ming L C and Manghnani M H 1985 inSolid state physics under pressure: recent advances with anvil devices (ed) S Minomura (Tokyo: KTK Scientific) p. 135
Peercy P S, Fritz I J and Samara G A 1975J. Phys. Chem. Solids 36 1105
Pine A S and Dresselhaus G 1972Phys. Rev. B5 4087
Worlton T G and Beyerlein R A 1975Phys. Rev. B12 1899
Wyckoff E W 1963Crystal Structure (New York: Interscience)1 250
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Jayaraman, A., Kourouklis, G.A. A high pressure Raman study of TeO2 to 30 GPa and pressure-induced phase changes. Pramana - J Phys 36, 133–141 (1991). https://doi.org/10.1007/BF02845698
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DOI: https://doi.org/10.1007/BF02845698