Abstract
Spectral-luminescence properties of complex compounds of the composition Rb2TeHal6 (Hal = Cl, Br, I) have been investigated. The dependence of the luminescence intensity on the geometric structure of the tellurium(IV) coordination polyhedron of the anion sublattice type and the position of the A-band in the spectra has been revealed. Rb2TeCl6 has exhibited the maximum luminescence intensity at 77 and 300 K for isle-like octahedral coordination of the Te(IV) ion. Rb2TeCl6 and Rb2TeBr6 have demonstrated a reversible thermochromism determined by the temperature dependence of the Jahn–Teller splitting of the A-band in the absorption (reflection) spectra of the tellurium(IV) ion.
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