BARC/PUB/2004/0147

 
 

Pressure Induced Phase Transitions in Hydroquinone

 
     
 
Author(s)

Rao, R.; Sakuntala, T.; Arora, A. K.; Deb, S. K.
(HPPD;SSPD)

Source

Journal of Chemical Physics, 2004. Vol. 121 (15): pp. 7320-7325

ABSTRACT

High pressure behavior of α-hydroquinone (1,4-dihydroxybenzene) has been studied using Raman spectroscopy up to pressures of 19 GPa. Evolution of Raman spectra suggests two transitions around 3.3 and 12.0 GPa. The first transition appears to be associated with the lowering of crystal symmetry. Above 12.0 GPa, Raman bands in the internal modes region exhibit continuous broadening suggesting that the system is progressively evolving into a disordered state. This disorder is understood as arising due to distortion of the hydrogen-bonded cage across the second transition around 12 GPa.

 
 
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