Talk:Neptunium

Elements Mid‑importance

	Chemistry portal This article is supported by WikiProject Elements, which gives a central approach to the chemical elements and their isotopes on Wikipedia. Please participate by editing this article, or visit the project page for more details.ElementsWikipedia:WikiProject ElementsTemplate:WikiProject Elementschemical elements articles
Mid	This article has been rated as Mid-importance on the importance scale.

California: San Francisco Bay Area Low‑importance

	California portal This article is within the scope of WikiProject California, a collaborative effort to improve the coverage of the U.S. state of California 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.CaliforniaWikipedia:WikiProject CaliforniaTemplate:WikiProject CaliforniaCalifornia articles
Low	This article has been rated as Low-importance on the project's importance scale.
	San Francisco Bay Area portal This article is supported by San Francisco Bay Area task force (assessed as Low-importance).

University of California High‑importance

	This article is within the scope of WikiProject University of California, a collaborative effort to improve the coverage of articles relating to University of California, its history, accomplishments and other topics 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.University of CaliforniaWikipedia:WikiProject University of CaliforniaTemplate:WikiProject University of CaliforniaUniversity of California articles
High	This article has been rated as High-importance on the project's importance scale.

Neptunium has been listed as one of the Natural sciences good articles under the good article criteria. If you can improve it further, please do so. If it no longer meets these criteria, you can reassess it.

Article milestones
Date	Process	Result
July 7, 2014	Good article nominee	Listed
September 29, 2014	Good topic candidate	Promoted
February 15, 2024	Good topic removal candidate	Demoted
A fact from this article appeared on Wikipedia's Main Page in the "Did you know?" column on August 6, 2014. The text of the entry was: Did you know ... that neptunium* is found in at least three allotropes‍—‌one orthorhombic, one tetragonal, and one body-centered cubic?*
Current status: Good article

Archives

Archive 1

This page has archives. Sections older than 730 days may be automatically archived by when more than 2 sections are present.

Update on space group

A couple years ago, I tagged issues with the space group. There were no less than four separate symbols in scholarly sources (P42, P42₁, P42₁2, and P4/nmm). The source for symbol P42 cites a source that instead gives symbol P42₁2, so P42 is clearly a typo. I recently figured out that P42₁ is an archaic symbol from the 1935 edition of the international tables [1] (it was subsequently replaced with symbol P42₁2). Basically, notation aside, all sources agree on P42₁2, except Mehl 2016 who claims he re-analyzed the original data, and found a slightly higher symmetry of P4/nmm (P4/nmm is a minimal supergroup of P42₁2 [2], so this is a relatively minor difference). 〈 Forbes₇₂ | Talk 〉 02:28, 30 November 2023 (UTC)[reply]

Semi-protected edit request on 7 April 2024

Moved from Template talk:Infobox neptunium

This edit request to Template:Infobox neptunium has been answered. Set the |answered= or |ans= parameter to no to reactivate your request.

"many false claims" is stated in the article, please specify what false claims or remove the line. The element was first discoverd by a romanian and it was not proved as a false or true claim. 84.232.193.86 (talk) 19:14, 7 April 2024 (UTC)[reply]

Not done: please provide reliable sources that support the change you want to be made. '''[[User:CanonNi]]''' (talk|contribs) 23:50, 7 April 2024 (UTC)[reply]

Naming

I think the description on how it was named in the introduction paragraph is kind of clumsy. Anyone else agree? Jokem (talk) 03:40, 9 April 2024 (UTC)[reply]

I replaced it with a more concise text. Not sure whether we should keep the mention of uranium even if it is quite redundant with transuranic. Feel free to improve. Jähmefyysikko (talk) 09:23, 9 April 2024 (UTC)[reply]

Image

There used to be an image of a neptunium sphere. Now it’s got replaced by liquified neptunium. Why is this? Legoplanecrash5383 (talk) 22:21, 3 August 2024 (UTC)[reply]

Because: "Changed infobox image because the previous image was a nickel-clad sphere, we weren't seeing actual neptunium metal". –LaundryPizza03 (d c̄) 00:44, 4 August 2024 (UTC)[reply]

It's not liquefied neptunium, it's solid. Source: [3] HertzDonuts (talk) 05:57, 4 August 2024 (UTC)[reply]

@HertzDonuts: Though, this site claims that the Np image is not real. (Though it includes a real one, with a long-since dead source.) Double sharp (talk) 15:05, 20 August 2024 (UTC)[reply]

If that Np is fake, it should be deleted, just like other fake element pictures. But after that we have no more pictures of Np left except the original nickel-clad sphere. Nucleus hydro elemon (talk) 15:29, 20 August 2024 (UTC)[reply]

@Nucleus hydro elemon: There is a real Np pic here. Double sharp (talk) 16:12, 20 August 2024 (UTC)[reply]

That image appears to have been created during the research for paper which has been published under a CC license, but the image wasn't part of the paper and is copyright a japanese nuclear institute, so we can't use it. Mrfoogles (talk) 17:53, 20 August 2024 (UTC)[reply]

We could under fair use if it's really true that there's no free equivalent. We already do that for curium, after all. Double sharp (talk) 03:25, 21 August 2024 (UTC)[reply]

I've uploaded that picture of neptunium. Nucleus hydro elemon (talk) 10:43, 3 September 2024 (UTC)[reply]

Thank you! Double sharp (talk) 10:44, 3 September 2024 (UTC)[reply]

This website claims that it's a photo of caesium. Mrfoogles (talk) 17:41, 20 August 2024 (UTC)[reply]

It can't possibly be that: caesium is golden. Double sharp (talk) 03:32, 21 August 2024 (UTC)[reply]

Also, the Np image is by LLNL, which is a US Government contracter, and its employees are not employees of the federal government, so I think that the license is incorrect. I'm pretty sure that LLNL publishes its images under a CC-BY-NC license. Mrfoogles (talk) 17:47, 20 August 2024 (UTC)[reply]

I've removed the picture, due to concerns (see above) over whether it's real or not. Double sharp (talk) 15:37, 2 September 2024 (UTC)[reply]

There is a picture of a neptunium fragment in a Japanese lab. Why does the image keep frequently changing? 2603:8080:D03:89D4:4CEA:FD5B:6E65:90A (talk) 02:18, 10 September 2024 (UTC)[reply]

Because we found out that the first picture didn't show visible Np (because it was nickel-plated), and then we found out that the second picture didn't show visible Np either (because it's a computer-generated imitation). So this seems to be the best we can do. Double sharp (talk) 02:22, 10 September 2024 (UTC)[reply]