AN ORDERING TRANSITION IN INCL3 STAGE-2 INTERCALATED GRAPHITE

An ordering transition at 155 K is reported for the stage 2 InCl3 grap hite intercalation compound. It was detected as a sharp decrease in th e resistivity during the first cooling of a sample. It was observed al so by differential thermal analysis during both warming and cooling. X -ray diffraction from intercalated single crystals showed an ordered p hase at room temperature after a sample was cooled below the transitio n temperature. The ordered phase has a (4 root 3 x 4 root 3)R30 degree s unit cell with respect to the hexagonal graphite lattice.