Reaction of elemental metal Pb, Ag, Zn and Cd with sulfur or selenium in liquid ammonia at room temperature for 2–12 h produces highly crystalline PbS, PbSe, Ag2S, Ag2Se and X-ray amorphous ZnS, ZnSe, CdS and CdSe in virtually quantitative yield.
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Henshaw et al. (1996) studied this question.
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