Talk:Calcium

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).

This  level-4 vital article is rated GA-class on Wikipedia's content assessment scale. It is of interest to the following WikiProjects:

Elements Top‑importance 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 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 Lowercase sigmabot III when more than 4 sections are present.

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

The heading "Heat of vaporisation" is spelled "Heat of vaporization" on other Chemical Element Wikipedia entries, for example "Barium", and should be altered accordingly. This heading appears in the data column on the right of the main text. 120.149.83.176 (talk) 06:37, 11 January 2023 (UTC)[reply]

 Not done That is because this article is written in en-GB not en-US. For more background, see WP:ENGVAR. -DePiep (talk) 08:25, 11 January 2023 (UTC)[reply]

Why would simple units conversion require citation? Aluminium's density is 2700 kg/m³ and its conductivity 37.7 MS/m (26.5 nΩ⋅m); for Calcium that's 1550 kg/m³ and 29.8 MS/m (33.6 nΩ⋅m) respectively. Conductivity by mass is therefore 14 kS/kg/m² for Aluminium and 19.2 kS/kg/m² for Calcium. For completeness sake, Copper figures are 8960 kg/m³, 59.6 MS/m (16.78 nΩ⋅m), 6.6 kS/kg/m² (poor conductivity for a given weight of cable). 188.120.48.205 (talk) 20:32, 23 November 2023 (UTC)[reply]

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]

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]