Effect of temperature and pressure on the raman spectrum of As4S3

Chattopadhyay, T. ; Carlone, C. ; Jayaraman, A. ; Schnering, H. G. v. (1982) Effect of temperature and pressure on the raman spectrum of As4S3 Journal of Physics and Chemistry of Solids, 43 (3). pp. 277-284. ISSN 0022-3697

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Official URL: http://www.sciencedirect.com/science/article/pii/0...

Related URL: http://dx.doi.org/10.1016/0022-3697(82)90190-1


The Raman spectrum of crystalline As4S3 has been investigated as a function of temperature from 4 to 430 K at ambient pressure, and as a function of pressure to 70 kbar at ambient temperature. The external mode frequencies which appear clearly separated from the internal modes exhibit stronger pressure and temperature sensitivity compared to the latter modes. At the β-As4S3 to α-As4S3 phase transition near 410 K, the external modes change discontinuously indicating a first-order phase transition. The internal mode frequencies remain practically unaffected. The dv/dP and dv/dT data are analyzed using well established approaches. Application of non-hydrostatic pressure (>60 kbar) appears to destroy the crystallinity of As4S3.

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ID Code:96024
Deposited On:30 Nov 2012 07:29
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