The invention relates to a method for the production of high-purity, heteroleptic, orth-etallated, organometallic compounds of application as a functional material for colouring components in a wide range of applications within the widest sense of the electronics industry. The occurrence of the detection cluster is detected when the maximal ratio exceeds an intensity threshold. A sliding slot is defined in the locating member. The phone system can then display the caller location information to a phone system, an agent or operator so that emergency services can be quickly and accurately dispatched.