Dave, i already wrote a thread,that i had copper wires plated with a gold flash,and over this flash,with paladium ----i asked for sugestions of how to recuperate the paladium and the litlle gold in the wires----many kilos of this wire----I decided to fuse this wires into copper bars.and put this bars in ar----it becomes a solution with gold,copper and palladium----no residue------to this solution i add dmg,and a green pdg pwder is formed--on filtration and washing this green powder,it becomes the yellow fluffy PDDMG powder===this pwder is put in a pyrex vessel,and the vessel is heated lightly ,and a black (impure) pd sponge is formed----the question was ,why a green powder is formed ?,and on washing ,becomes yellow fluffy powder---i think that no niquel is involved,and as the solution is acid,niquel is not precipitated------ni with dmg, in an alkaline ambient,would precipitate a red powder-------- i am writing this long thread
in attention to members that helped me to form this sistem-----1kilo of the wire have 1,5grams of palladium--Know with slight changes ,i obtain rhodium from plated wires-----the forum members helped me a lot---so have to show the results obtained to them----thanks for reading this thread---Arthur Kierski