Talk:Calcium

This is the talk page for discussing improvements to the Calcium article.
This is not a forum for general discussion of the article's subject.

Put new text under old text. Click here to start a new topic.
New to Wikipedia? Welcome! Learn to edit; get help.

Article policies

Find medical sources: Source guidelines · PubMed · Cochrane · DOAJ · Gale · OpenMD · ScienceDirect · Springer · Trip · Wiley · TWL

Archives: 1, 2: 12 months

Calcium 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.
Review: June 27, 2017. (Reviewed version).

Elements Top‑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
Top	This article has been rated as Top-importance on the importance scale.

Dietary Supplements High‑importance

	Calcium is part of WikiProject Dietary Supplements, a collaborative attempt at improving the coverage of topics related to dietary supplements. If you would like to participate, you can choose to edit this article, or visit the project page for more information.Dietary SupplementsWikipedia:WikiProject Dietary SupplementsTemplate:WikiProject Dietary SupplementsDietary supplement
High	This article has been rated as High-importance on the project's importance scale.

Women's Health High‑importance

	This article is within the scope of WikiProject Women's Health, a collaborative effort to improve the coverage of women's health 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.Women's HealthWikipedia:WikiProject Women's HealthTemplate:WikiProject Women's Healthwomen's health
High	This article has been rated as High-importance on the importance scale.

Medicine Mid‑importance

	Medicine portal This article is within the scope of WikiProject Medicine, which recommends that medicine-related articles follow the Manual of Style for medicine-related articles and that biomedical information in any article use high-quality medical sources. Please visit the project page for details or ask questions at Wikipedia talk:WikiProject Medicine.MedicineWikipedia:WikiProject MedicineTemplate:WikiProject Medicinemedicine
Mid	This article has been rated as Mid-importance on the project's importance scale.

Alternative medicine

This article is within the scope of WikiProject Alternative medicine, a collaborative effort to improve the coverage of Alternative medicine related articles 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.Alternative medicineWikipedia:WikiProject Alternative medicineTemplate:WikiProject Alternative medicineAlternative medicine

This article is written in British English with Oxford and IUPAC spelling (colour, realize, organization, analyse; note that -ize is used instead of -ise; aluminium, sulfur and caesium) and some terms that are used in it may be different or absent from other varieties of English. According to the relevant style guide and chemistry naming conventions, this should not be changed without broad consensus.

Archives

Archive 1

Archive 2

This page has archives. Sections older than 365 days may be automatically archived by when more than 4 sections are present.

Crystal structure

According to the handbook of chemistry and physics 95th edition (CRC Press), face-centered cubic calcium turns into body-centered cubic above 443°C and not hexagonal as mentionned in the article. This is also written in this abstract (here: https://iopscience.iop.org/article/10.1149/1.2430364/meta) from 1956 (but for a temperature of 464°C). Fullmetalgrudo (talk) 13:42, 28 January 2024 (UTC)[reply]

Thanks Fullmetalgrudo, I find other recent authoritative sources agree with your post and updated the article to state that it changes from fcc to bcc as you note. The source I used (Arblaster 2018) says that publications from 1956 and 1958 "reported an intermediate hexagonal close-packed (hP2) structure but Peterson and Fattore 1961 showed that this was due to hydrogen contamination." –MadeOfAtoms (talk) 10:08, 20 April 2024 (UTC)[reply]

Applications

One application I had read about elsewhere in Wikipedia which I didn't see on this page is that calcium can be alloyed with magnesium to prevent it from catching fire; while alloying aluminum with magnesium also reduces the risk of catching fire, such alloys can still catch fire at very high temperatures, while a suitable alloy with calcium would not catch fire under any circumstances. Quadibloc (talk) 14:17, 26 June 2024 (UTC)[reply]

I checked "Magnesium Alloys" (doi 10.1002/14356007.a15_581). No mention of Ca-Mg alloys.--Smokefoot (talk) 18:56, 27 June 2024 (UTC)[reply]

Semi-protected edit request on 24 December 2024

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

Change "heat of vaporisation" to "heat of vaporization" bc this is in British Oxford English. 98.219.46.92 (talk) 02:40, 24 December 2024 (UTC)[reply]

Done _ZZ^Z 'S 02:43, 24 December 2024 (UTC)[reply]

Wiki Education assignment: BIOL 3358 Cellular and Molecular Neuroscience

This article is currently the subject of a Wiki Education Foundation-supported course assignment, between 14 January 2025 and 28 April 2025. Further details are available on the course page. Peer reviewers: Sandisk9045.

— Assignment last updated by Sandisk9045 (talk) 02:13, 2 March 2025 (UTC)[reply]

Semi-protected edit request on 27 April 2025

It is requested that an edit be made to the semi-protected article at Calcium. (edit · history · last · links · protection log)

This template must be followed by a complete and specific description of the request, that is, specify what text should be removed and a verbatim copy of the text that should replace it. "Please change X" is not acceptable and will be rejected; the request must be of the form "please change X to Y".

The edit may be made by any autoconfirmed user. Remember to change the |answered=no parameter to "yes" when the request has been accepted, rejected or on hold awaiting user input. This is so that inactive or completed requests don't needlessly fill up the edit requests category. You may also wish to use the {{ESp}} template in the response. To request that a page be protected or unprotected, make a protection request.

Change the heading “Vapor pressure” to “Vapour pressure” - The only difference between British Oxford English and British non-Oxford English is that it uses -ize instead of -ise. 96.33.107.226 (talk) 02:48, 27 April 2025 (UTC)[reply]