Phase Homogeneity and Crystal Structure of Sb88Te12 Synthesized by Melt-quench Method

doi:10.1007/s40195-013-0005-3

Abstract

Abstract:

Phase homogeneity and crystal structure of Sb₈₈Te₁₂ alloy synthesized by melt-quench method have been analyzed using X-ray diffraction (XRD) and Raman spectroscopy. Rietveld refinement of crystal structure of Sb₈₈Te₁₂ has revealed the formation of Sb₈Te₃ and Sb phases respectively with 11R and A7 structures (space group is R3m). Phase fractions of the phases Sb₈Te₃ and Sb have been determined to be 44.44% and 55.56% respectively. Raman spectrum of Sb₈₈Te₁₂ has showed a highest intensity peak at 156 cm^{- 1} and another peak at 151.1 cm^{- 1}, which correspond to A_1g modes of Sb₈Te₃ and element Sb, respectively. Analysis of Raman spectrum has substantiated the results obtained from structure refinement regarding the presence of two different phases.

Key words: Sb₈₈Te₁₂ alloy, Melt-quench method, XRD, Rietveld refinement, Raman spectroscopy;, Multiphase formation

C. Rangasami. Phase Homogeneity and Crystal Structure of Sb₈₈Te₁₂ Synthesized by Melt-quench Method[J]. Acta Metallurgica Sinica (English Letters), 2013, 26(4): 441-446.

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Phase Homogeneity and Crystal Structure of Sb₈₈Te₁₂ Synthesized by Melt-quench Method

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