STRUCTURAL STUDIES ON METAL BROMIDE GRAPHITE-INTERCALATION COMPOUNDS

Some improved X-ray diffraction techniques applied to the two 3rd stag e metal bromide graphite intercalation compounds with CdBr2 and CoBr2 should give some more detailed structure informations. However only fe w more informations have been obtained from precession photographs and high resolution powder diffraction on the two GICs. Measuring several flakes on an automatic four circle diffractometer did not yield addit ional informations. Some attempts to solve the structure by Rietveld-M ethodes using the powder diffraction intentisities failed. Using the f ew available informations, an idealized model for a 3rd stage GIC is p roposed. On the basis of this model some observations are discussed.