Abstract: A process for producing potassium and silicon doped molybdenum (KS molybdenum). The process involves mixing an aqueous ammonium molybdate solution and a dilute aqueous potassium silicate solution. The molybdate solution has a pH and a specific gravity sufficient to promote formation of diammonium molybdate crystals in the mixture. Preferably, the pH is about 8.8-11.0 and the specific gravity is about 1.20-1.32. The amount of potassium silicate and the amount of potassium silicate solution are selected to provide predetermined amounts of potassium and silicon in the mixture, preferably about 800-1300 ppm potassium and about 500-1100 ppm silicon, both amounts based on the amount of molybdenum. The mixture is heated to aid dissolution of the potassium silicate and ammonium molybdate in said mixture and to produce a homogeneous solution of ammonium molybdate, potassium, and silicon.