Beryllium sulfide powders can be prepared by the reaction of
sulfur and beryllium in a hydrogen atmosphere by heating the mixture for 10-20 minutes at temperatures from 1000-1300 °C. If done at 900 °C, there is beryllium metal impurities. Alternatively, it can be prepared by the reaction of
beryllium chloride and
hydrogen sulfide at 900 °C. ==References==