common sources of ion of rubidium cation

rubidium cation | common sources of ion

rubidium tetraphenylborate (1 eq) | rubidium perchlorate (1 eq) | rubidium nitrate (1 eq) | rubidium iodide (1 eq) | rubidium hydroxide hydrate (1 eq) | rubidium formate (1 eq) | rubidium fluoride (1 eq) | rubidium chloride (1 eq) | rubidium carbonate (2 eq)