Talk:Zeolite

oxygen concentrator

A Zeolite bed is the core of an oxygen concentrator. The pressure swing adsorption process uses zeolite as a molecular sieve. Room air is compressed into a zeolite bed, then the remaining air components are drawn off. The bed is then released to atmosphere, the zeolite releases the nitrogen, and the process is restarted. By removing the nitrogen from regular air, you get a mixture of mostly oxygen with traces of carbon dioxide and Argon.

A german company is using those stones to generate cold. Bildunterschrift from Zeotech.

Uses: Medical

Unless someone can put some citations into that mess of a paragraph about QuikClot to clear up whether it's calcium silicate (which the New Scientist article seems to refute, given that it mentions an alternative to QuikClot being made of calcium and silica) or a zeolite (which the New Scientist article doens't explicitly state), the whole thing should be deleted or remarked out of existence until it can properly cited. dil 18:59, 5 April 2007 (UTC)

CO2 entrapment

An advance has reportedly been made in "trapping" CO2 molecules in ZIFs, or zeolitic imidazolate frameworks. I'm unsure if it should be covered here as I'm not too well introduced in the subject, but I'm posting the link FYI and also did in the external links section: http://www.scienceblog.com/cms/material-selectively-swallows-co2-15480.html What I'm wondering is if it should have an extra mention in the "Uses" section, or if this is somehow too unrelated for that. — Northgrove 01:03, 15 February 2008 (UTC)

ZIFs are not zeolites. They are a subclass of metal-organic materials that have imidazolate as organic linker and a zeolite-like topology. —Preceding unsigned comment added by 128.40.197.43 (talk) 12:37, 26 February 2008 (UTC)

Where's the Water

2nd sentence: "The term was originally coined in the 18th century by a Swedish mineralogist named Axel Fredrik Cronstedt who observed, upon rapidly heating a natural mineral, that the stones began to dance about as the water evaporated." "...the water..."? What water, Fire-water? It's good someone cares enough about etymology to try- but this purported explanation explains little to me; I cant even understand it well enough to correct it- nor should I, because as an article opening it serves as a warning, to question or review the subsequent techinical writing. Hilarleo (talk) 03:31, 26 August 2008 (UTC)

Clinoptilolite and mercury poison

Clinoptilolite is being touted as "cure-all" for mercury poisoning (Chronic not acute). Has any scientific analysis been performed on the exchange/capture properties of this version of a zeolite for mercury ? If so should it be posted here - either for or against ?(Ukbrit (talk) 04:08, 10 October 2008 (UTC))

Picture

The picture labeled "zeolite" needs a more descriptive caption. There are (as of writing) 179 different zeolite frameworks, and the mineral shown could be any one of the 48 or so different naturally-occurring zeolites. Kaiserkarl13 (talk) 18:55, 4 November 2008 (UTC)

Scope of article

The emphasis of this article is heavily skewed towards mineralogy. Synthetic zeolites are important as industrial catalysts, and there is little mention of their preparation, properties, uses, or unique structures.

Natural Zeolites

This article states that there are 80 naturally occurring zeolite frameworks, but the citation provided does not list 80 unique zeolites. For example, Chabazite-K and Chabazite-Ca are NOT unique frameworks; they're both CHA. Similarly, faujasite-Ca and faujasite-Na are the same structure (FAU) with different counter-ions (they're also the same as NaY, HY, NaX, CsX, and a bunch of other synthetic zeolites that have different ions and/or compositions but the same framework connectivity). The number this refers to should reflect the number of frameworks (of the 179 currently discovered) that occur naturally, NOT the number of names we've come up with to describe different compositions of the same material. Kaiserkarl13 (talk) 15:38, 18 December 2008 (UTC)

It did not say 80 naturally occurring zeolite "frameworks" - it was referring to zeolite minerals. And chabazite-K is a different recognized mineral from chabazite-Ca. The website referenced lists naturally occurring recognized minerals. We do need to separate the mineralogy discussion from the synthetic commercial stuff to avoid the above confusion. Vsmith (talk) 00:36, 19 December 2008 (UTC)

Lexical form of the Greek root word

Even though some sites give zein as the lemma of the root of the word, that is actually the infinitive form[1]—the usual lexical form for ancient Greek is the indicative form, which is zeō[2] (cf. wiktionary:ζέω). 24.243.3.27 (talk) 17:09, 26 February 2009 (UTC)

And, just so it's not WP:OR, here is a source that gives the proper lexical form in connection with the etymology of the word zeolite: [3] (PDF, p. 37 [thesis p. 28], § 2.4.1 Zeolites). 24.243.3.27 (talk) 18:24, 26 February 2009 (UTC)