The primary commercial form of mixed rare-earth metals (95%) prepared by the electrolysis of fused rare earth chloride mixture, d approximately 6.67, mp approximately 648C. Form: wafflelike plates weighing 40–60 lb packed in oiled paper, immersed in oil, or coated with vinyl paint.
Hazard:
Flammable, dangerous fire risk.
Use:
Lighter flints, ferrous and nonferrous alloys, cast iron, aluminum, nickel, magnesium and copper alloys, getter in vacuum tubes, magnetic alloys.