The Effect of Pressure on the Raman and Absorption Spectra of PrCl3, PrBr3, and NdBr3
Applied Spectroscopy, Vol. 43, Issue 6, pp. 1038-1045 (1989)
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Abstract
Solid-state absorption and Raman phonon spectroscopic investigations of PrCl3, PrBr3, and NdBr3 under high pressure have been carried out at room temperature. These studies showed that the UCl3-type hexagonal form of PrCl3 and PrBr3 converts with the application of pressure to the PuBr3-type orthorhombic crystal structure. The absorption and Raman spectra obtained from PrBr3 and NdBr3 at pressures above ~260 kbar exhibit differences from spectra obtained at lower pressures, where they exhibit the PuBr3-type orthorhombic structure. These spectral differences suggest that a phase transformation might have taken place to an as-yet-unidentified crystal structure.
Citation
W. R. Wilmarth, G. M. Begun, R. G. Haire, J. P. Young, and J. R. Peterson, "The Effect of Pressure on the Raman and Absorption Spectra of PrCl3, PrBr3, and NdBr3," Appl. Spectrosc. 43, 1038-1045 (1989)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-43-6-1038
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