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.

Chemical pressure effects on the spectroscopic properties of Nd³⁺-doped gallium nano-garnets

V. Monteseguro, M. Rathaiah, K. Linganna, A.D. Lozano-Gorrín, M.A. Hernández-Rodríguez, I.R. Martín, P. Babu, U.R. Rodríguez-Mendoza, F.J. Manjón, A. Muñoz, C.K. Jayasankar, V. Venkatramu, and V. Lavín
Opt. Mater. Express 5(8) 1661-1673 (2015)

Laser Raman Spectra of Liquid and Solid Bromine and Carbon Disulfide Under High Pressure

A. J. Melveger, J. W. Brasch, and E. R. Lippincott
Appl. Opt. 9(1) 11-15 (1970)

Infrared Spectroscopy at High Pressures: Polarized Spectra of Single Crystals of Acetonitrile

R. J. Jakobsen and Y. Mikawa
Appl. Opt. 9(1) 17-22 (1970)

Absorption Spectra of Mercury, Cadmium and Zinc at High Pressure*

F. L. Mohler and H. R. Moore
J. Opt. Soc. Am. 15(2) 74-81 (1927)

High Pressure Optics

A. Van Valkenburg
Appl. Opt. 9(1) 1-4 (1970)