Abstract

Infrared emission spectra of molten alkali metal nitrates and chlorates were recorded over the frequency interval from 50 to 3000 cm^-1 employing a Fourier transform spectrometer. Emission spectra of molten mixtures of NaNO₃ and NaClO₃ also were measured, and the ν₃ mode of NO₃⁻ ion was observed with solutions containing about 0.1 mole % NaNO₃. Far infrared spectra of the melts revealed a broad band which progressively shifted to a lower frequency as the mass of the cation increased. The emission spectrum of each salt at a given temperature was recorded in fewer than 2 min and was of comparable or of better quality than previously reported infrared spectra.

Application of High Temperature Infrared Emission Spectroscopy to Molten Salts

T. R. Kozlowski
Appl. Opt. 7(5) 795-800 (1968)

Infrared Emission Spectra of Quartz*

Tunis Wentink and Walter G. Planet
J. Opt. Soc. Am. 51(6) 595-600 (1961)

Gradient-index profile control from mixed molten salt baths

Joan E. Samuels and Duncan T. Moore
Appl. Opt. 29(28) 4042-4050 (1990)

Progress of Radiometric Observation of Infrared Atomic Emission Spectra

Curtis J. Humphreys
J. Opt. Soc. Am. 50(12) 1171-1175 (1960)

Remarks on the Infrared Spectra of Metallic Salts Containing Groups of the XO₂-Type Ion

Clément Duval and Jean LeComte
J. Opt. Soc. Am. 44(4) 261-263 (1954)