A new crystal structure for (BEDT-TTF)2SbF6 and some of its physical properties |
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Authors: | G. K. R. Senadeera T. Mori |
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Affiliation: | (1) Institute of Fundamental Studies, Hantane Road, Kandy, Sri Lanka;(2) Department of Organic and Polymeric Materials, Tokyo Institute of Technology, O-okayama, 152-8552 Tokyo, Japan |
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Abstract: | A new crystal structure forbis (ethylenedithio)tetrathiafulvalene [(BEDT-TTF) 2 SbF6] was determined by single crystal X-ray diffraction. The crystal structure was refined in theP - 1 space group at room temperature. Crystal data for new structure are as follows: triclinic, a = 8.670 (2) Å,b = 8 664 (2) Å,c = 16.842 (5) Å,α = 89°.29 (2),β = 90°.71 (3),γ = 92°.67 (1),V = 1263.64 Å 3,Z = 2,D x = 2.136 g cm -3, (Mo-Kα),λ = 0.7107 Å,R = 0.057 for a total of 5517 independent reflections. The donors form a trimerized column, and the band structure calculated by the tightbinding approximation shows band insulator properties. The temperature dependent of the d.c. resistivity shows a semiconducting behaviour with room temperature resistivity along the c-axis; ρ 290 K = 5.6 ohm cm. |
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Keywords: | Organic conductors β -(ET) 2PF6 (ET2)SbF6 electrocrystallization |
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