Optical spectra of Yb(III) in melting fluorides of alkali metals

A. A. Khokhryakov, A. S. Paivin, М. А. Samoylova.

ABSTRACT

  This article is devoted to investigation of optical spectra of molten systems MeF–YbF₃ (M =Li, Na, K, Cs). It was found from spectral data that complex groupings YbF₆^3- were formed. The formation of grouping YbF₆^4- was discovered in melt LiF–YbF₃ causes from partly restorative atmosphere in stove-unit. It was assumed that sharp jump of wave number corresponding to electronic transition ²F_7/2 → Г₈²F_5/2 Yb(III) from LiF, NaF melts to KF, CsF ones caused by decrease of second coordination number from 14 to 13.

KEYWORDS:

micro-inhomogeneity, micro-heterogeneity, structural transformations, overheating, aluminum alloys

DOI:10.31857/S0235010620020073