A compound of the general formula AaMbPcOd\u2003\u2003in which the variables are each defined as follows:M is at least one transition metal selected from Co, Ni, Mn, Fe and Cr,A is Li or LixNa1-x where x is in the range from 0. Next, an ink chamber partition 8 and a nozzle plate 11 are stacked over the oscillation layer 7. Included is a method comprising providing status and performance monitoring information from an ONT via an OMCI at the ONT, wherein the status and PM information is associated with at least one managed function instance of at least one non-OMCI domain.