Chromium Disilicide, CrSi₂

Chromium Disilicide, CrSi₂, has been prepared by the method described for the previous compound, a higher percentage of silicon being used. It has also been obtained by heating a mixture of chromium sesquioxide and charcoal with excess of silica in an electric furnace. By the first method the silicide is obtained as a grey crystalline powder; by the second, as long, grey, lustrous needles, only obtained free from silicon with difficulty. Density 4.393. It is decomposed by hydrofluoric acid.