Polymorphic Transformation
in TlSe and the Electrical Properties of Phases

A. I. Najafov^a, G. G. Gusenov^b, O. Z. Alekperov^b,
R. M. Sardarly^a, A. P. Abdullaev^a, and N. A. Éyubova^a

^a Institute of Radiation Problems, Azerbaijan National Academy of Sciences, ul. F. Agayeva 9, Baku, AZ 1143 Azerbaijan

e-mail: sardarli@yahoo.com

^b Institute of Physics, Azerbaijan National Academy of Sciences, pr. Dzhavida 33, Baku, AZ 1143 Azerbaijan

Received November 1, 2007; in final form, February 20, 2008

Abstract—Alloys in the TlSe–Se system on the side of the TlSe compound in the phase diagram have been
investigated using differential thermal, X-ray powder diffraction, and microstructural analyses. The phase dia-
gram of the system has been constructed, and the temperature dependences of the electrical conductivity of the
phases obtained have been examined. An analysis of the thermograms of alloys in the (TlSe)_0.96–Se_0.04 system
has revealed a structural phase transition at a temperature of 470 1 K. Investigations into the temperature
dependences of the electrical conductivity in the range 120–450 K have demonstrated that the temperature
dependence of the electrical conductivity for the (TlSe)_0.96Se_0.04 alloy exhibits metallic behavior.

PACS numbers: 71.20.Nr, 72.20.-i, 78.70.Ck

DOI: 10.1134/S106377450805009X

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