Synthesis, Structure and Properties of (BEDT-TTF)₄Hg₃I₈, a New Organic Bis(ethylenedithio)tetrathiafulvalene-Based Conductor with an Octaiodinemercurate Anion

T. G. Takhirov The Institute of Chemical Physics of the USSR Academy of Sciences, Chernogolovka, 142 432, USSR

O. N. Krasochka The Institute of Chemical Physics of the USSR Academy of Sciences, Chernogolovka, 142 432, USSR

O. A. Dyachenko The Institute of Chemical Physics of the USSR Academy of Sciences, Chernogolovka, 142 432, USSR

L. O. Atovmyan The Institute of Chemical Physics of the USSR Academy of Sciences, Chernogolovka, 142 432, USSR

M. Z. Aldoshina The Institute of Chemical Physics of the USSR Academy of Sciences, Chernogolovka, 142 432, USSR

L. M. Goldenberg The Institute of Chemical Physics of the USSR Academy of Sciences, Chernogolovka, 142 432, USSR

R. N. Lyubovskaya The Institute of Chemical Physics of the USSR Academy of Sciences, Chernogolovka, 142 432, USSR

V. A. Merzhanov The Institute of Chemical Physics of the USSR Academy of Sciences, Chernogolovka, 142 432, USSR

R. B. Lyubovskii The Institute of Chemical Physics of the USSR Academy of Sciences, Chernogolovka, 142 432, USSR

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Abstract

The structure of a new organic conductor, (BEDT-TTF)₄Hg₃I₈, has been solved, temperature dependences on conductivity, thermopower and magnetic susceptibility studied. The BEDT-TTF molecules form two different types of stacks. At 260 K a jump in a conductor and thermopower takes place, characterized by a hysteresis of ca. 8 K. At this temperature the phase transition of the first order occurs in (BEDT-TTF)₄Hg₃I₈. Below and above the transition temperature the conductivity has an activation character. At a pressure of 29 kbar the conductivity remains metallic up to 50 K. The paramagnetic susceptibility in this temperature range has a maximum.

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Synthesis, Structure and Properties of (BEDT-TTF)₄Hg₃I₈, a New Organic Bis(ethylenedithio)tetrathiafulvalene-Based Conductor with an Octaiodinemercurate Anion

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Synthesis, Structure and Properties of (BEDT-TTF)4Hg3I8, a New Organic Bis(ethylenedithio)tetrathiafulvalene-Based Conductor with an Octaiodinemercurate Anion

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Synthesis, Structure and Properties of (BEDT-TTF)₄Hg₃I₈, a New Organic Bis(ethylenedithio)tetrathiafulvalene-Based Conductor with an Octaiodinemercurate Anion