OSA's Digital Library

Applied Spectroscopy

Applied Spectroscopy


  • Vol. 48, Iss. 12 — Dec. 1, 1994
  • pp: 1477–1482

Molten KF-AlF3 System: A Study by Raman Spectroscopy

E. Tixhon, E. Robert, and B. Gilbert

Applied Spectroscopy, Vol. 48, Issue 12, pp. 1477-1482 (1994)

View Full Text Article

Acrobat PDF (548 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

  • Export Citation/Save Click for help


Molten AlF3-KF mixtures have been investigated in a wide composition range by Raman spectroscopy and with the use of a graphite windowless cell. The results of this study clearly show that the most intense spectrum components are made of three distinct bands whose intensities vary when the composition is changed. The most probable interpretation of our data is to consider the existence of an equilibrium between AlF63-, AlF52-, and AlF4-, This explanation is a confirmation of the conclusions of recent papers suggesting the presence of these species in similar AlF3-NaF mixtures. The presence of only one major polarized band for AlF52- is explained by considering a fast exchange between the axial and equatorial fluoride at the elevated experimental temperature (1300 K). A quantitative analysis of the distribution of the fluoroaluminate species has been performed by decomposition of the Raman-band envelope. The calculated equilibrium constants (expressed in mole fraction units) for AlF52- ⇌ AlF4- + F- and AlF63- ⇌ AlF52- + F- are KA = 0.11 ± 0.01 and KB = 5 ± 1, respectively. Compared with the NaF-AlF3 system, these constants correspond to a stabilization of less coordinated fluoroaluminates when the size of the counterion increases.

E. Tixhon, E. Robert, and B. Gilbert, "Molten KF-AlF3 System: A Study by Raman Spectroscopy," Appl. Spectrosc. 48, 1477-1482 (1994)

Sort:  Journal  |  Reset


References are not available for this paper.

Cited By

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited