... , Bi, Cu, Fe, Mg, Ni, Pb & Zn is bellow 1ppm;3, Physical Size:Lump, Powder.4, Usage:It is mainly used ... , HgxCd1-xTe underlay, infrared electroluminescence electric eye, infrared detectors, X-ray detectors, nuclear radio activity detectors, approach visible light radiation etc.5, Packing:It is ...