Action of monoatomic cations on the structure and spectra of Mx(1)M1-x(2)UO2(NO3)3 crystals |
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Authors: | A P Zazhogin V V Sytko and D S Umreiko |
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Institution: | (1) Belarusian State University, Minsk, Belarus;(2) F. Skorina Gomel State University, 104 Sovetskaya Str., 246699 Gomel , Belarus;(3) A. N. Sevchenko Scientific-Research Institute of Applied Physical Problems, Belarusian State University, Minsk, Belarus |
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Abstract: | The action of the monovalent M+ cations on the luminescent properties of the mixed M
x
(1)
M
1-x
(2)
UO2(NO3)3 crystals, where M is Na, K, Rb, Cs, or NH4 , has been investigated. It has been established that the spectral positions of the bands of vibronic transitions depend linearly on the ratio between the concentrations of the M(10) and M(2) cations. It is shown that the crystals considered are composed of lRbUO2(NO3)3] nCsUO2(NO3)3] clusters, where l/n = x/(1 - x). The spectral regularities revealed are determined by the partial contributions of the M(1) and M(2) cations to their combined, polarizing action on the uranyl complex and are explained by the ligand nature of its highest occupied molecular orbital.Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 71, No. 6, pp. 827–830, November–December, 2004.This revised version was published online in April 2005 with a corrected cover date. |
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Keywords: | mixed crystals of uranyl nitrates luminescence influence of cations polarizing action |
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