EXPERIMENTAL-STUDY OF A NEW URANYL SULFATE GIC

Stability of new graphite uranyl sulfate intercalation compounds has b een studied as a function of temperature and concentration. The action of uranyl sulfuric acid aqueous solution on graphite leads to the for mation of two mixed phases of intercalation products: the usual sulfat e phase (di=800 pm) and a uranyl sulfate phase (di=855 pm). The struct ure of uranyl sulfate phase has been characterized by X-ray diffractio n. The electronic distribution pattern along the graphite c axis has b een established with [001] reflections while [hk0] reflections has led to the determination of the planar primitive cell. A complete Raman m icrospetroscopic study has been done with pure uranyl sulfate graphite compounds from HOPG to stage 1. This technique has also displayed int ercalated species.