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Synthetic metals based on tetramethyltetraselenafulvalene(TMTSF): Varied anisotropy in the low temperature (125K) structures of (TMTSF)2X, X=C104-, PF6-, and AsF6-.

Authors
Journal
Solid State Communications
0038-1098
Publisher
Elsevier
Publication Date
Volume
44
Issue
8
Identifiers
DOI: 10.1016/0038-1098(82)91084-5

Abstract

Abstract The low temperature (125K) X-ray crystal structures of (TMTSF) 2X, X= C10 4 -, PF 6 -, and AsF 6 - reveal decreases in the intermolecular interand intrastack Se-Se contact distances upon cooling (298K to 125K) which are highly anisotropic and different from one salt to another. The changes in the interstack distances, which are normal to the stacking direction, are approximately twice those involving intrastack Se-Se interactions. These observations establish that the anisotropic structural changes which accompany decreased temperature are common to numerous (TMTSF) 2X radical cation conducting salts.

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