Talk:Henry Roscoe (chemist)

	Biography portal This article is within the scope of WikiProject Biography, a collaborative effort to create, develop and organize Wikipedia's articles about people. All interested editors are invited to join the project and contribute to the discussion. For instructions on how to use this banner, please refer to the documentation.BiographyWikipedia:WikiProject BiographyTemplate:WikiProject Biographybiography articles
	This article is supported by the science and academia work group.

Chemistry Mid‑importance

	This article is within the scope of WikiProject Chemistry, a collaborative effort to improve the coverage of chemistry on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.ChemistryWikipedia:WikiProject ChemistryTemplate:WikiProject ChemistryChemistry articles
Mid	This article has been rated as Mid-importance on the project's importance scale.

Greater Manchester Low‑importance

	Greater Manchester portal This article is within the scope of WikiProject Greater Manchester, a collaborative effort to improve the coverage of Greater Manchester on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.Greater ManchesterWikipedia:WikiProject Greater ManchesterTemplate:WikiProject Greater ManchesterGreater Manchester articles
Low	This article has been rated as Low-importance on the project's importance scale.

London Low‑importance

	London portal This article is within the scope of WikiProject London, a collaborative effort to improve the coverage of London on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.LondonWikipedia:WikiProject LondonTemplate:WikiProject LondonLondon-related articles
Low	This article has been rated as Low-importance on the project's importance scale.

Mystery[edit]

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)[reply]

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)[reply]