The effect of electron irradiation on the optical properties of the natural armenian zeolite-clinoptilolite

Hrant Yeritsyan 1 , Vachagan Harutiunian 1 , Volodia Gevorkyan 1 , Norair Grigoryan 1 , Eleonora Hakhverdyan 1 , Sergey Nikoghosyan 1 , Aram Sahakyan 1 , Rudolf Gevorgyan 2 , Hakob Sargisyan 2 , and Yeghis Keheyan 3
  • 1 Yerevan Physics Institute, 2 Alikhanian Bros. str., 375036, Yerevan, Armenia
  • 2 Yerevan State University, 1 Aleck Manoukyan str., 375049, Yerevan, Armenia
  • 3 Istituto per lo studio dei Materiali Nanostruttutturati Dipartimento di Chimica Roma 1, Piazzale Aldo Moro, 5-00185, CNR, Roma, Italy

Abstract

Infrared (IR) absorption and luminescence in chemically and radiation-modified natural Armenian Zeolite (clinoptilolite) samples have been studied. The luminescence was studied in 390–450 nm and 620–710 nm wavelength bands, and the IR measurements were carried out in the 400–5400 cm−1 range. It is shown that the luminescence intensity depends on the content of pure clinoptilolite in the samples and, probably on the distribution of “passive” luminescence centers over Si and Al sites that became “active” under radiation or chemical treatment. The samples of electron irradiated clinoptilolite have higher luminescence intensity than the chemically and thermally treated ones. A decrease in the intensity of IR absorption bands at 3550 cm−1 and 3650 cm−1 was found after irradiation.

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