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Characterization of tantalum pentachloride containing melts by Raman spectroscopy

Journal Article · · Inorg. Chem.; (United States)
DOI:https://doi.org/10.1021/ic50199a044· OSTI ID:5879274

Raman spectroscopy has been used to obtain information on various TaCl/sub 5/ containing melts. In molten TaCl/sub 5/, studied between 220 and 350/sup 0/C, a gradual dissociation of molecular Ta/sub 2/Cl/sub 10/(D/sub 2h/) to monomeric TaCl/sub 5/(D/sub 3h/) appears to take place. Evidence for a stable octahedral TaCl/sub 6//sup -/ ion in molten KTaCl/sub 6/ at 420/sup 0/C is presented. The binary TaCl/sub 5/-AlCl/sub 3/ system at approx. 200/sup 0/C contains noninteracting Ta/sub 2/Cl/sub 10/ and Al/sub 2/Cl/sub 6/ molecules. The complexes formed when TaCl/sub 5/ is dissolved in AlCl/sub 3/-NaCl and AlCl/sub 3/-KCl melts depend on acidity and temperature: TaCl/sub 6//sup -/(O/sub h/) is present only in basic to slightly acidic melts; TaCl/sub 5/(D/sub 3h/) is mainly stable in neutral and acidic melts at high temperature; Ta/sub 2/Cl/sub 10/ is found only in acidic melts at lower temperatures.

Research Organization:
Univ. of Tennessee, Knoxville
OSTI ID:
5879274
Journal Information:
Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 18:9; ISSN INOCA
Country of Publication:
United States
Language:
English