At room temperatures, this element is the only antiferromagnetic metal, and alloying iron with this element produces stainless steel.  
Along with cobalt, oxides of this element began to replace iron in magnetic tape in the sixties. This element is refined using aluminum and a barium peroxide starter in a Goldschmidt process. This element's trioxide forms a red needle-like precipitate used to clean laboratory glassware; a solution of that compound and sulfuric acid can be used to oxidize primary and secondary alcohols without affecting carbon-carbon double bonds. With lead, this element forms red and yellow minerals such as crococite, but its pure oxides include the green mineral viridian.  At room temperatures, this element is the only antiferromagnetic metal, and alloying iron with this element produces stainless steel.  FTP, name this hard, lustrous metal with atomic number twenty four.
Along with cobalt, oxides of this element began to replace iron in magnetic tape in the sixties.
Chromium [accept Cr]