Talk:Goldschmidt classification

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Siderophile candidates[edit]

Tungsten(W)[edit]

If you google for "siderophile tungsten" you get a lot of results. Also, my "Encyclopedia of the Solar System, Second Edition" by McFadden et al. 2006. I think it should be moved or, at least, explained why it's not siderophile. Does it have to do with pressure (siderophile in a planet core, not in the lab)?--Zimriel (talk) 20:32, 14 August 2008 (UTC)

Housekeeping[edit]

gly4200 link missing[edit]

This link http://www.geology.fau.edu/course_info/fall02/gly4200/Abundance.htm results in a file not found error (404) right now. If this turns out permanent the link should be removed. 84.160.246.75 17:15, 25 September 2005 (UTC)

I removed it, since it's still 404 almost four months later. I added the "Periodic Table" category, though some other category might be more appropriate becuse this classification is ifferen than any periodic table-based classifiations. -- Mikeblas 00:24, 22 January 2006 (UTC)

That page is available archived: http://web.archive.org/web/20030822005140/http://www.geology.fau.edu/course_info/fall02/gly4200/Abundance.htm Sorry — don't have time to track down where page was cited originally and see if citation would still be useful. —Blanchette (talk) 21:45, 7 August 2012 (UTC)

Terminology[edit]

While a bit of googling revealed that the provided explanations for the terms "lithophile", "siderophile" etc. ("Lithophile means 'silicate loving'.") are widespread, they seem pretty questionable to me from an etymological point of view. (for instance, I'm fairly positive "lithophile" should be literally translated as "rock loving") In that context, using a term like "means", implying a literal translation, is rather misleading. If that explanation is indeed frequently provided by scientific literature, I think it would be better to point it out as a commonly held misconception or handwave explanation. Anybody who can claim particular expertise in the field willing to look into it? (If nothing happens for a while, I -might- attempt boldly doing so myself, but...) --4bpp (talk) 11:48, 18 November 2009 (UTC)

The etymology of "chalcophile" doesn't lead back to "sulfur-loving". The Greek word from which we get the "chalc" meant "ore", and also meant "bronze", as well as meaning "copper". In the case of Goldschmidt's "chalcophile", the "ore" meaning is the one intended; most ores are either oxides or chalcogenides (which mostly means sulfides, since sulfur is so much more abundant than selenium or tellurium or polonium, and polonium doesn't even have any stable isotopes). Also: the atmophilic elements are also called the volatile elements. Volatile substances are those that occur as either gases or liquids in conditions ambient on the surface. Atmophilic (volatile) elements are either volatile noble gases or occur in volatile compounds. Eldin raigmore (talk) 16:38, 26 December 2011 (UTC)
I changed the definitions and etymologies of all four groups. In some cases this meant revising the first and/or second sentence; in some cases it meant adding a new first sentence. I also changed the discussion of hydrogen and water in the last paragraph of the "atmophile" section. Eldin raigmore (talk) 17:12, 26 December 2011 (UTC)

I don't have a source handy, but I am almost certain that, contrary to the claim that none of nitrogen's oxides are stable with respect to nitrogen and oxygen, aqueous nitrate is in fact the thermodynamically preferred state given redox conditions at the earth's surface, and only through biological processes (denitrification and photosynthesis) are the elemental gases maintained in the atmosphere. Withlyn (talk) 02:50, 21 April 2011 (UTC)

The last paragraph of the Chalcophile elements section should be heavily revised or deleted: these elements DO NOT constitute the bulk of commercially important metals (just think Fe, Al and Cr for example) and even if they did the reason given regarding the energy intensive purification methods is a non sequitur.

From a historical perspective I would concede the point when it comes to Cu however where clearly the ease of purification with charcoal, along with the relative abundance and ease of identification of its green (and some blue) mineral sources led to its prominence in human cultural evolution i.e. the bronze age — Preceding unsigned comment added by 110.33.214.194 (talk) 16:25, 10 January 2012 (UTC)

Radium, Actinium, Protactinium, Francium[edit]

Base on http://en.wikipedia.org/wiki/Abundances_of_the_elements_(data_page) :

- Ra, Ac and Pa are all more abundant than Rn and Po. However this article list these 3 as "very rare" and Po, Rn not. Why?

- Base on http://en.wikipedia.org/wiki/Astatine At has only ~28 g on Earth => much less than Ac, Pa, Ra, still included

- For Tc, Pm, Fr, Np, Pu: Francium 20 - 30 g, Promethium at least ~572 g (Occurence section). Tc, Pu, Np not yet found number.

Phanthanhtom (talk) 12:04, 28 September 2012 (UTC)

I agree those elements should also be colored. The very rare category should be removed altogether. Maybe it could be renamed to "below detection limit" and only used for those elements that really can't be detected in the crust. Even Tc99 occurs as a trace element and should have a color. --Tobias1984 (talk) 21:02, 28 September 2012 (UTC)