Local structural analyses on molten terbium fluoride in lithium fluoride and lithium–calcium fluoride mixtures - Archive ouverte HAL Access content directly
Journal Articles Journal of Fluorine Chemistry Year : 2010

Local structural analyses on molten terbium fluoride in lithium fluoride and lithium–calcium fluoride mixtures

Abstract

X-ray absorption fine structure (XAFS) measurements on terbium fluoride in molten lithium fluoride and in molten lithium–calcium fluoride mixtures, (e.g. 0.20TbF3–0.80LiF, 0.20TbF3–0.62LiF–0.18CaF2, 0.20TbF3–0.48LiF–0.32CaF2, 0.50TbF3–0.50LiF, and 0.50TbF3–0.38LiF–0.12CaF2), have been carried out. In the solid state, coordination number of terbium (Ni) and inter ionic distances between terbium and fluorine in the first neighbor (ri) are nearly constant in all mixtures. In 0.20TbF3–0.80LiF, 0.20TbF3–0.62LiF–0.18CaF2 and 0.50TbF3–0.50LiF mixtures, Ni's decrease from ca. 8 to 6 and ri's also decrease from ca. 2.29 to 2.26 Å on melting. On the other hands, in molten 0.20TbF3–0.48LiF–0.32CaF2 and 0.50TbF3–0.38LiF–0.12CaF2 mixtures, Ni's are slightly larger than 6 and ri's do not change. These facts correspond to the amount of F− supplied by solvent melts, i.e. the effect of CaF2 becomes predominant at bCaF2 > 0.32 in ternary 0.20TbF3–aLiF–bCaF2 mixtures and at bCaF2 > 0.12 in ternary 0.50TbF3–aLiF–bCaF2 mixtures.
Fichier principal
Vignette du fichier
Numakura_5796.pdf (294.47 Ko) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-03547646 , version 1 (28-01-2022)

Identifiers

Cite

Masahiko Numakura, Yoshihiro Okamoto, Tsuyoshi Yaita, Hideaki Shiwaku, Hiroshi Akatsuka, et al.. Local structural analyses on molten terbium fluoride in lithium fluoride and lithium–calcium fluoride mixtures. Journal of Fluorine Chemistry, 2010, 131 (10), pp.1039-1043. ⟨10.1016/J.JFLUCHEM.2010.07.011⟩. ⟨hal-03547646⟩
11 View
18 Download

Altmetric

Share

Gmail Facebook X LinkedIn More