Talk:Hafnium

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Untitled[edit]

Article changed over to new Wikipedia:WikiProject Elements format by maveric149 and Dwmyers. Elementbox converted 10:58, 14 July 2005 by Femto (previous revision was that of 16:28, 10 July 2005).

Information Sources[edit]

Some of the text in this entry was rewritten from Los Alamos National Laboratory - Hafnium. Additional text was taken directly from, from the Elements database 20001107 (via dict.org), and WordNet (r) 1.7 (via dict.org). Data for the table was obtained from the sources listed on the subject page and Wikipedia:WikiProject Elements but was reformatted and converted into SI units.

File:Hafnium pellets with a thin oxide layer.jpg to appear as POTD soon[edit]

Hello! This is a note to let the editors of this article know that File:Hafnium pellets with a thin oxide layer.jpg will be appearing as picture of the day on December 30, 2015. You can view and edit the POTD blurb at Template:POTD/2015-12-30. If this article needs any attention or maintenance, it would be preferable if that could be done before its appearance on the Main Page. — Chris Woodrich (talk) 23:35, 10 December 2015 (UTC)

Hafnium
Pellets of 99.9% pure argon-arc remelted hafnium, with visible crystalline structures. The colors are a thin-film effect in the oxide layer; this chemical element is generally a lustrous, silvery gray, tetravalent transition metal. Hafnium is widely used in filaments and electrodes, as well as in some superalloys.Photograph: Heinrich Pniok


Occurrence: error[edit]

It is not true, that Hf doesn't occur as free element in the nature.

http://www.mindat.org/min-47058.html

Eudialytos (talk) 16:29, 20 November 2016 (UTC)

That's on the Moon, though. Hf and Zr cannot effectively be separated on Earth due to the lack of impacts allowing their fractionation (anyway they would be oxidised). But I will change it. Double sharp (talk) 01:55, 21 November 2016 (UTC)
Thanks. Yes, the Moon regolith has zones with a reductive "assemblage", though there are portions were oxidative-conditions compounds were found (KReO4).Eudialytos (talk) 20:13, 29 August 2017 (UTC)

File:Hafnium ebeam remelted.jpg to appear as POTD soon[edit]

Hello! This is a note to let the editors of this article know that File:Hafnium ebeam remelted.jpg will be appearing as picture of the day on September 3, 2017. You can view and edit the POTD blurb at Template:POTD/2017-09-03. If this article needs any attention or maintenance, it would be preferable if that could be done before its appearance on the Main Page. — Chris Woodrich (talk) 12:15, 22 August 2017 (UTC)

Hafnium
Hafnium is a chemical element with the symbol Hf and atomic number 72. A lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in many zirconium minerals. Its existence was predicted by Dmitri Mendeleev in 1869, though it was not identified until 1923, making it the last stable element to be discovered. Hafnium is named for Copenhagen, where it was discovered.Photograph: Heinrich Pniok


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