Visible and Ultraviolet Absorption Spectra of Nickel Chloride Dissolved in Fused LiCl–KCl Mixtures
Journal Article
·
· Journal of Physical Chemistry
Absorption spectra were measured for solutions of NiCl2 in fused LiCl--KCl mixtures near the eutectic composition over the wave length range of 220 to 750 m mu and at temperatures of 360 to 550 deg . In the ultraviolet region an absorption band was found with maximum at 260 m mu and a molar absorbancy index of (3.6 plus or minus 0.2) x 103 at 395 deg . The visible spectrum consisted of four overlapping bands with maxima at 512, ca. 590, 625, and 695 m mu at 398 deg . The highest of these bands (625 m mu ) had a molar absorbancy index of 61 plus or minus 3 at a temperature of 398 deg and a solvent salt composition of 41.0 mole% KCl. The absorbancy indices of all bands changed considerably with temperature. Furthermore, the ultraviolet band broadened and its maximum shifted to longer wave lengths with increasing temperature. It was shown that these absorption bands were caused by at least two light-absorbing species derived from NiCl2. With increasing temperature the concentration of one species decreased while the concentration of another species increased. At a constant temperature the concentration of all species giving rise to observed light absorption was proportional to the concentration of total nickel. The spectra were changed by a small but measurable amount with small changes in the composition of the solvent salt.
- Research Organization:
- Oak Ridge National Lab., Tenn.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-12-009759
- OSTI ID:
- 4309306
- Journal Information:
- Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 4 Vol. 62; ISSN 0022-3654
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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