66089

JOURNAL OF APPLIED SPECTROSCOPY

ELECTRON SPECTRA OF Me₇Eu₂UO₂(PO₄)₅ CRYSTALS

UDC 543.43:546.79

V. V. Syt'ko, N A. Aleshkevich, E. L. Tikhova, D. S. Umreiko,* and I. A. Khartonik Absorption and luminescence spectra of Me₇Eu₂UO₂(PO₄)₅ crystals (Me represents Na, Rb, or Cs) are investigated. It is established that the luminescence of Eu³⁺ ions in these crystals is sensitized by uranyl. The effect of the outer-sphere cation Me⁺ on the spectroscopic properties and structural features of the compounds under study is considered.

Key words: spectrum, crystal, uranyl, europium, energy tranfer.