A compound represented by the formula:wherein R1 is methoxy, methylthio, ethyl, etc. The invention preferably comprises a removable base plate to allow for stable placement on a flat surface such as a workbench or shop floor. A single RTA process at a temperature below the temperature of contamination diffusion is carried out, preferably at about 650 C. The middling size materials are segregated into low, middle and high specific gravity materials by the use of spirals.