Rubidium iodate, RbIO₃

Iodic anhydride reacts with rubidium carbonate to form the Rubidium iodate, RbIO₃, and the salt is also produced by passing chlorine into a hot concentrated solution of rubidium iodide and hydroxide. It forms monoclinic crystals isomorphous with those of potassium iodate, and of density 4.559 at 14° C. At 23° C. the solubility is 2.1 grams in 100 grams of water. It yields acid iodates, such as RbIO₃,HIO₃ and RbIO₃,2HIO₃, and also compounds of the type RbIO₃,F₂ and RbIO₃,HIO₃,4HF.