. . . "Examples of suitable anions An??? are Hal???, wherein Hal is halogen, for example Br???, F, J??? or particularly Cl???, furthermore HCO3 ???, CO3 2???, H2PO4 ???, HPO4 2???, PO4 3???, HSO4 ???, SO4 2??? or the radical of an organic acid such as OCOCH3 ??? and the like." . .