Unfortunately, there appears to be a misunderstanding regarding the chemical compound Rb2SO6. Currently, there is no existence of a chemical compound with the formula Rb2SO6 in the list of recognized substances.
It can be seen that, Rb is the symbol of Rubidium – a chemical element in the periodic table with the atomic number 37 and belongs to group 1 – the group of alkali metals. Rubidium usually has an oxidation number of +1 in compounds.
SO6, meanwhile, does not seem to correspond to any known element or group of elements. S is the symbol for sulfur, but sulfur does not form atomic structures with 6 oxygen atoms in a molecule. Typically, sulfur combines with 4 oxygen atoms to form the sulfate ion SO4(2-).
This could be a spelling mistake or a misunderstanding of chemical formulas. You may want to review this information for a more accurate request.