Talk:Calcium phosphate

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Vapor pressure[edit]

What is the vapor pressure of Calcium phosphate? -- (Comment from

That would be a fiendishly difficult thing to measure. I don't know whether anyone has done it. Usually salts like Calcium Phosphate have practically no vapor pressure. --Slashme 16:40, 18 December 2005 (UTC)

Please do not merge[edit]

Please do not merge this page with Tricalcium phosphate. Calcium phosphate is the commonly used term for the family of compounds and does not automatically refer to tricalcium orthophosphate. This is the nomenclature used in the literature that actually deals with these compounds and, as such, I belive that this is in line with Wikipedia's "generally known as" policy. Nick

Wikifying IUPAC[edit]

I'd like to propose that we Wikify back to calcium monohydrogen phosphate and that tricalcium phosphate becomes calcium orthophosphate (tribasic). I believe this would be closer to the IUPAC system. Does anyone have an argument for why the current system is better? Nick 20:11, 5 March 2006 (UTC)

Calcium Phosphate / Smoking / Cancer[edit]

Do NOT remove facts while claiming them to be "unsubstantiated" when those facts have been widely reported for years across all manner of science journals, legal court cases, admissions from tobacco companies themselves, television, newspapers, websites, and Wikipedia itself. Just because YOU don't know something doesn't make it 'unsubstantiated'.—The preceding unsigned comment was added by (talkcontribs) .

The link above ( suggests the main two elements involved are: lead-210 and polonium-210. Neither is present in pure calcium phosphate and it's a little disingenuous to suggest that they are without commentry on purity of fertilisers etc. Perhaps a rewording would be useful? MidgleyDJ 11:55, 21 July 2006 (UTC)
What is the reference for the 90% of lung cancers? It sounds dubious to me, but this is outside my sphere of knowledge. MidgleyDJ 22:18, 21 July 2006 (UTC)
If it's reported by all those sources, you should have no trouble citing one. If not, I'm going to remove the claim. —Keenan Pepper 22:45, 21 July 2006 (UTC)
Removed claim re: 90% of lung cancers. MidgleyDJ 05:25, 6 August 2006 (UTC)
This paper J Natl Cancer Inst. 1981 Jan;66(1):27-31. would suggest there isnt linkage between radioisotopes and smoking related lung cancer. Anyone else have any references? MidgleyDJ 08:15, 6 August 2006 (UTC)
This paper, Hecht SS (1999) Tobacco Smoke Carcinogens and Lung Cancer, Journal of the National Cancer Institute 91(14) 1194-1210. Says that there is not enough Polonium 210 in cigarette smoke to significantly impact lung cancer in smokers. MidgleyDJ 08:16, 6 August 2006 (UTC)
Do any of the papers mention calcium phosphate? I'm still confused about what calcium phosphate has to do with all this. —Keenan Pepper 09:16, 6 August 2006 (UTC)
Hi Keenan, I was too - I assume the fertiliser isnt pure CaHPO4 and contains trace amounts of Lead and Polonium??


Perhaps this page should include a link to hydroxylapatite, since that is actually the mineral component of teeth. Haligonian1 (talk) 21:35, 2 July 2008 (UTC)

CAS numbers of the chemicals....[edit]

-- (talk) 08:52, 31 January 2010 (UTC)

-- (talk) 08:59, 31 January 2010 (UTC)

-- (talk) 09:03, 31 January 2010 (UTC)

-- (talk) 09:08, 31 January 2010 (UTC)

electrically conductive[edit]

Is it electrically conductive?

Major edit proposed[edit]

I propose that we convert this article to a disambiguation site, directing readers to the various phosphates of calcium. These are important materials and we should try to get this right. Suggestions welcome. --Smokefoot (talk) 11:56, 29 July 2014 (UTC)