The optical constants <i>n</i>(ν) and <i>k</i>(ν) for 1.0- and 0.5-M concentrations of sodium sulfate at ambient temperatures were determined by Kramers-Kronig phase-shift analyses of the near-normal reflectances over the spectral region from 2 to 20 µ<i>m</i>. For the absorption that is due to the ν<sub>3</sub> vibration of the SO<sub>4</sub><sup>2-</sup> ion, total band strengths, in reciprocal centimeters/(mol/liter), of 14.2 and 13.6 were measured for the 1.0- and 0.5-M concentrations, respectively. Changes in band position and intensity are discussed for this absorption.
© 1982 Optical Society of America
R. W. Adams, K. A. Fuller, and H. D. Downing, "Infrared optical constants of aqueous solutions of sodium sulfate," J. Opt. Soc. Am. 72, 893-894 (1982)