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Stability of new graphite-uranyl-sulfate intercalation compounds was studied experimentally as a function of temperature and concentration. The action of uranyl-sulfuric acid aqueous solution leads to the formation of two mixed-phase intercalation products: the usual sulfate phase (d i = 798 pm) and a new uranyl-sulfate phase (d i = 855 pm). This latter phase is obtained alone after...
Structural and spectroscopic studies of a new graphite uranyl sulfate phase are performed. By using X-ray diffraction, an electron distribution pattern along the graphite c-axis for stages 1-4 is calculated, based on [001] analysis; [hk0] and [hkl] reflection analysis allows the determination of the parameters of the planar primitive cell and demonstrates the existence of a three-dimensional order...
During the electrochemical intercalation and deintercalation processes of sulfuric acid into graphite, the electrical resistivity along the graphene layers was followed with a contactless method. At 20°C, the intercalation process is associated with a large decrease of resistivity; the lowest values are observed for stages 8 to 5 formation, and remain nearly constant until stage 1. However, the...
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