Abstract

Using high-resolution electron diffraction we have studied the in-plane superlattice structure of stage-2, -3, and -4 antimony pentachloride--intercalated graphite. We used an analytical scanning transmission electron microscope with a microdiffraction resolution of 100 A\r{}. The samples were examined over a wide temperature range (77--295 K) with no indication of any phase change. Two previously unknown long-range superlattices, with structures (\ensuremath{\surd}31 \ifmmode\times\else\texttimes\fi{} \ensuremath{\surd}31 )R\ifmmode\pm\else\textpm\fi{}8.95\ifmmode^\circ\else\textdegree\fi{} and (\ensuremath{\surd}19 \ifmmode\times\else\texttimes\fi{} \ensuremath{\surd}19 )R\ifmmode\pm\else\textpm\fi{}23.4\ifmmode^\circ\else\textdegree\fi{}, and unit cells with long-range molecular orientational ordering were found.

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