A. Yu. Orlova, R. R. Gainov, A. V. Dooglav, I. N. Pen'kov, E. A. Korolev, “Structure and transport properties of stephanite (Ag$_5$SbS$_4$) according to antimony nuclear quadrupole resonance”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2012, Volume 96, Issue 6,Pages 407

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CONDENSED MATTER

Structure and transport properties of stephanite (Ag$_5$SbS$_4$) according to antimony nuclear quadrupole resonance

A. Yu. Orlova^a, R. R. Gainov^a, A. V. Dooglav^a, I. N. Pen'kov^b, E. A. Korolev^b

^a Institute of Physics, Kazan (Volga region) Federal University
^b Institute of Geology and Petroleum Technologies, Kazan Federal University

Abstract: Silver sulfo-antimonide Ag$_5$SbS$_4$ (stephanite) has been studied by nuclear quadrupole resonance (NQR) spectroscopy on antimony nuclei. The temperature dependences of the spectroscopic and relaxation parameters have been examined in the range of $4.2$–$395$ K. A phase transition at $140$ K and internal motions with an activation energy of $0.29$ eV have been experimentally detected. The nature of the phase transition and diffusion of silver ions has been discussed in view of the reported data.

Received: 18.07.2012