Two-phase systems of zinc or zinc-rich alloys and molten chloride salts are being employed at temperatures up to 800°C in developing pyrochemical processes for the recovery of uranium and Plutonium from partially spent reactor fuels. Tungsten was chosen as the crucible material because it and certain of its alloys possess excellent chemical resistance to these highly corrosive molten systems. Several methods of fabrication were employed to produce the crucibles that were tested under process conditions. These methods include 1) pressing and sintering, 2) shear forming, 3) arc welding of rolled sheet, 4) plasma spraying of free-standing tungsten shapes, and 5) plasma spraying of tungsten on substrate materials. Both pressed-and-sintered and shear-formed tungsten crucibles have given excellent service and reliability. Crucibles formed by plasma spraying tungsten on a mandrel show promise. Tungsten crucibles formed by arc welding or plasma spraying of tungsten on a substrate were unsatisfactory.