Talk:Clay

message: This section is frankly terrible and I'd suggest simply deleting it, it's hard to even tell what it's supposed to be about. Is it about identifying if something is a clay or identifying the particular mineral composition?   — Preceding unsigned comment added by AngryZinogre (talk • contribs) 04:57, 8 October 2018 (UTC)
replies: text: I agree that this section needs work, however I would not suggest deleting it altogether. Perhaps it would be worthwhile to change the name to "characteristics of clay" and break it down into physical and chemical properties. Physical properties such as grain size are discussed previously in the article and could be expanded on here, and chemical properties such as ion exchange are not discussed at all, but are important to add. --HannahWV (talk) 22:45, 31 January 2019 (UTC)
thread_title:  Identification section 

message: I am not good at editing the main page stuff.  But though i should add that Montmorillonite clay is the most common member of the smectite clay family.  Montmorillonite is generally referred to as “nanoclay”. It is also the most common material used in plastic nanocomposites.  Nanoclay:  a clay from the smectite family. Smectites have a unique morphology, featuring one dimension in the nanometer range.  Think of them like a deck of cards.  They are relatively long and wide compared to their height.  If you were to spread them out equally three dimensionally you have reached optimization for most uses.  While looking at the spaced out cards one dimension makes them almost impossible to see, yet their effects are extreme.  It is currently being use by many companies for various uses.  Example companies are Bayer AG, Nanocor, PolyOne, Honeywell, Mitsubishi Gas Chemical, etc.  Everyone keeps hearing about nanotechnology, especially about carbon nano-tubes.  Nanoclays have made just as much of an impact already but dont have the following.
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Text which was added by anonymous user User:68.120.90.223 should be either removed or modified heavily. It definitely has something which is worth keeping but it also contains childish nonsenses like "clay is soil found in water" etc. This article should begin with geological explanation/definition and it is not what clay is technically, it is what clay actually is. Siim 19:34, 23 November 2005 (UTC)
thread_title:  Old text 

message: The Wikipedia Help Desk has received a message from Professor Tropf of Cal State Northbridge. Apparently, he tried to rewrite the article to include the use of clay in art. I quote from his e-mail: I tried to amend the article with a paragraph on the use of clay as an artistic medium, but it was removed.
 
Why was my plain-language addition to a highly technical article removed?  How can I write a plain-language explanation of what "clay" is and have it posted on Wikipedia?
I suspect that he was the anonymous user referred to above.
I will seek further information from him and see if we can we develop a compromise. Capitalistroadster 04:17, 25 November 2005 (UTC)
replies: text: The good prof. needs to read the article, the info is already there - as I mentioned above. Vsmith 17:21, 25 November 2005 (UTC)

text: Thanks, we may have some misunderstandings, but we try :-). My apologies for the confusion. I have moved your note to the bottom of the page as is the custom for Wikipedia talk pages, new comments at the end. Your edit improved the article - feel free to edit more (that's what it's all about), your expertise is welcome. If you have questions or concerns just ask on the relevant talk page - or ask on my talk page. Vsmith 00:45, 27 November 2005 (UTC)
thread_title: Message from Professor Tropf of Cal State Northridge

message: Can someone explain what happens to clay as it is fired? I suspect the silicate drys out, then welds to itself, but that seems like it would only happen in a narrow temperature range (lest the piece melt). Any ideas> —BenFrantzDale 13:20, 20 December 2005 (UTC)
replies: text: On the principle of "better late than never", see sintering.--Slashme 13:01, 26 September 2007 (UTC)
thread_title:  Firing? 

message: Okay, so I have a question and an idea. How did people, and how do people, make high quality pure clay for firing in a kiln from clay that probably has silt, sand and organic matter in it?
Well, I have an idea. In soils we learned that clay particles will remain in suspension after two hours, at which time the silt and sand will have dropped out. So assuming that usable firing clay needs only have silt and sand removed, one could get a canister of muddy water, let it sit for two hours and then siphon off as much water as possible without disturbing the silt and sand at the bottom. Then that water, once evaporated, would yeild very nearly 100% clay, right? I just don't know if 100% clay is what the "clay" we used in grade school to make ash trays is. 
Also, should this neat little link on making clay to paint with be on the external links on the main page? I'm ages five and up...
http://americanhistory.si.edu/kids/santos/TryItWaterBasedPaints.html
:  Clay will precipitate from a suspension made with hot water, too, after I freeze it. I wonder what's left in solution? As in, would that "filtrate of freezing" support an algae bloom if I seeded it with a Tsp. from my aquarium. Calcium and Silicate are major components of clay, but I suspect that organic contaminants and phosphate give it much character. Don't ask me how I know. It's Irish intuition confirmed by the similar smell of wet perlite. Silt is biologically active, black clay to me, something like I would find in the filter for my aquarium or a jar of Marmite :-| "Pure" clay? That's probably like weak whiskey. I'm pretty sure that clay contains a lot of lime water and dissolved glass, but I don't think it would be clay without the carbon and carbonate. BrewJay (talk) 07:56, 21 January 2008 (UTC)
thread_title:  clay in solution 

message: Hello Ballista,
I reverted your edit back to my earlier because:
1) You stated Clay is a sedimentary deposit, however some primary deposits are found
2) You stated hydrous silicate mineral, where as clay is not one mineral but a group of minerals and include, for example, halloysite, kaolinite and montmorillionite
Best regards,
Andy
Would just like to point out that primary clay does not necessarily = Kaolins. Kaolins are clay minerals that are formed by the breakdown of feldspar. Formation of kaolin/ china clay is often associated with the degredation of feldspar found in basic igneous rocks such as gabbro and granite. Whilst deposits of Kaolin would probably be primary, it is possible to get primary clays that are not kaolin. A primary clay merely refers to a clay deposit that is found where it was formed. For example clay formed from mudstones could be considered primary, providing it hadn't undergone any form of transportation.  — Preceding unsigned comment added by Bbbill123 (talk • contribs) 20:45, 13 June 2012 (UTC)
thread_title: Definition or decription

message: More reference to standards, and keeping clear the difference to the standards; USDA vs BS5930 80.229.47.244 15:57, 25 June 2007 (UTC)
thread_title:  standards 

message: Hi. I just found bit of guidance from Wikipeida itself:
"Deleting useful content. A piece of content may be written poorly, yet still have a purpose. Consider what a sentence or paragraph tries to say. Clarify it instead of throwing it away." This is pretty much what I have been saying all along.  —Preceding unsigned comment added by 81.153.65.237 (talk) 21:37, 26 September 2007 (UTC)
replies: text: To which content are you refering, please? ZueJay (talk) 02:37, 29 September 2007 (UTC)
replies: text:  Zuejay, this anon editor can't be bothered to a) sign up in Wiki, or b) source his edits which were mostly redundant. I think "what I have been saying all along" refers to his discussion at User:Basartalk which was a little bit dismissive on anon's part (especially since he spent more time arguing than it would take to pull out a book and source his edits). I don't see what the argument was about, nothing of much value was removed in the first place. I just pulled whatever minimal, non-repetitive information was there into a more concise description which I hope can be improved on without just reverting to an old edit by the anon user. I'm trying to find my books on stratigraphy and sedimentation, minerology, and a decent reference in "Petrology" (Ehlers/Blatt) to back up what I have written. Drillerguy 16:13, 29 September 2007 (UTC)
thread_title: Removing useful text

message: It would really be helpful if anon users who want to add constructively to this topic would create user names on wiki. I just had an anon user remove an easily sourced edit (which I reverted and sourced with a widely distributed and authoritative geologic text) for some reason which I can't fathom. Not quite vandalism because, true my edit wasn't sourced initially and the user had the courtesy to comment at least to their rationale, but my edit was easily verified and following the link to either bauxite or aluminum would have backed up the sentence. Bottom line is, this is a very important topic in the earth sciences. It is only a matter of time before editors from the geology project, soil project and civil engineering project start adding to this article. Anyone who is now anon and wants to contribute should not feel bad when editors from these projects revert unsourced content.Drillerguy 15:10, 1 October 2007 (UTC)
thread_title: Anon users please sign up

message: :Would the details of the geologic origin of the clay minerals be better placed in that article, rather than this more general one? Vsmith 16:09, 1 October 2007 (UTC)
replies: text: That's a fair question. There is a little bit of disambiguation which has to happen first. F'rinstance, is this article synonymous with "clay deposits"? Even if it is, I think it is tough to talk about "clay deposits" without going into what exactly they are composed of at least in a general sense. My first inclination is to describe first "clay" with the mindset that the averge Josephine Blow is looking for in depth information about what they - in everyday experience - know as "clay". That would have to include what "clay" is composed of re minerals, the types of clays, and how those clays and clay minerals occur in large enough volume to form recognizable "clay deposits". Then go on to the significance of "clay". I think it is important to note that clay as a natural material is mined for many uses, both for it's physical properties (ceramics, building materials, drilling fluids, etc.) but also for it's chemical properties (aluminum ore, etc.). We haven't even touched the surface of clay in geologic or geotechnical engineering perspective (fat clays, lean clays, organic clays, swelling clays, etc.).Drillerguy 19:33, 1 October 2007 (UTC)
thread_title: Geologic Origin here?

message: This section is the stubbiest part of the article. Once cleaned up, the section should be moved to clay minerals. -- Paleorthid (talk) 18:27, 24 November 2007 (UTC)
thread_title: Clay Societies

message: ↔♣m³m²#clay is made out of fine-grained minerals and is dug out of earth in large clumps. Lcay is formed over long periods of weathering of rocks.  —Preceding unsigned comment added by 72.87.235.174 (talk) 00:03, 16 September 2008 (UTC)
thread_title:  report on clay  

message: I have removed the category 'ceramic material' for the simply reason clay is not. It can however be a ceramic raw material. This is a very, very important difference. Ceramic materials are just that: ceramic. These are man-made materials which during their formation have been subject to high temperatures to impart permanent chemical and physical changes. Whereas 'ceramic raw materials' are those materials used at the start of this process: they are the pre-cursor materials.  —Preceding unsigned comment added by 210.54.238.178 (talk) 02:59, 6 April 2009 (UTC)
replies: text: Re-added category. Clay is a material used in ceramics. Raw or otherwise, so the category applies. Vsmith (talk) 03:04, 6 April 2009 (UTC)
replies: text: But it is incorrect! Lumping ceramic materials (which are made-made) and ceramic raw materials (very nearly always naturally occuring rocks & minerals) together is not only wrong but highly confusing. No college course, book or article on the subject ever does this. Why not simply have another category? In addition to 'Ceramic material' for such as stoneware, cordierite etc have and 'Ceramic raw materials' for such as clay, feldspar etc. Not only would this be correct but would help ensure no confusion with readers: and if Wikipedia is not here to inform correctly then what is it?  —Preceding unsigned comment added by 210.54.238.178 (talk) 04:08, 6 April 2009 (UTC)
thread_title: Ceramic material

message: The above is somewhat misleading.
When dry and placed in water, clay will change from being a solid mass into a slurry.  —Preceding unsigned comment added by 59.154.42.131 (talk) 04:10, 1 April 2010 (UTC)
thread_title:  "Clay, being relatively impermeable to water" 

message: Substituted at 11:52, 29 April 2016 (UTC)
thread_title: Assessment comment

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thread_title:  External links modified 

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thread_title:  A Commons file used on this page or its Wikidata item has been nominated for deletion 

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message: people eat clay because of cravings and when they smell wet soil after raining the crave for clay . 41.114.144.52 (talk) 18:45, 15 October 2023 (UTC)
thread_title:  Why people eat clay ?