Talk:Henry Roscoe (chemist)

Mystery
He showed that "the substance which had previously passed for the metal was contaminated with oxygen". What substance was it, then? Stefan Ivanovich (talk) 20:10, 25 June 2009 (UTC)
 * See http://www.minersoc.org/pages/Archive-MM/Volume_31/31-235-289.pdf Mottramite is the mineral: with a vanadium compound as a component.--Felix Folio Secundus (talk) 22:55, 25 September 2009 (UTC)