RHODIUM is one of six metals comprising the platinum group elements. Relative to platinum, RHODIUM is about 58% as dense. It is harder, much less workable and more resistant to corrosion than platinum. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, and surface treatment. Filing Code: Rh-1. Producer or source: Engelhard Corporation.