Abstract

<b>The thermal decomposition of the hexahydrate of samarium trichloride under an air atmosphere and under low pressure has been monitored through the use of ultraviolet-visible (UV-vis) diffuse reflection spectroscopy. The unique ability of lanthanide spectroscopy to investigate the near environment surrounding the samarium ion allowed for the identification of the hexa-, penta-, tetra-, tri-, di-, and monohydrates in both cases, as well as the formation of samarium oxychloride formed as the final decomposition product. The decomposition temperatures and the products observed in this report are compared to those obtained by other thermal and iso-thermal analyses of this compound, as well as the analogous decomposition of europium trichloride hexahydrate. Structural and environmental variations associated with the compounds, as indicated by the reflectance spectra, are discussed.</b>

Quantification of solid-phase chemical reactions using the temperature-dependent terahertz pulsed spectroscopy, sum rule, and Arrhenius theory: thermal decomposition of α-lactose monohydrate

G. A. Komandin, K. I. Zaytsev, I. N. Dolganova, V. S. Nozdrin, S. V. Chuchupal, V. B. Anzin, and I. E. Spektor
Opt. Express 30(6) 9208-9221 (2022)

Study of thermal decomposition mechanisms and absorption cross section of nitro-rich phenyl- and bis-series 1,2,3-triazoles

A. K. Chaudhary, K. S. Rao, and A. Sudheer Kumar
Appl. Opt. 55(4) 817-824 (2016)

Measuring absolute diffuse reflectance in the ultraviolet

James B. Gillespie and James D. Lindberg
Appl. Opt. 31(7) 955-959 (1992)

Sequential estimation of optical properties of a two-layered epithelial tissue model from depth-resolved ultraviolet-visible diffuse reflectance spectra

Quan Liu and Nirmala Ramanujam
Appl. Opt. 45(19) 4776-4790 (2006)

The Quantitative Spectrographic Analysis of the Rare Earth Elements*I. Determination of Samarium in NeodymiumII. Determination of Europium in Samarium

Velmer A. Fassel and Harley A. Wilhelm
J. Opt. Soc. Am. 38(6) 518-526 (1948)