Talk:Afwillite

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The student may have some work to do on formatting, but it's unfair to delete the page on him -- it's a correct and properly cited research article. J. Snow, Univ. Houston. —Preceding unsigned comment added by 129.7.53.114 (talk) 16:52, 7 December 2007 (UTC)

It is copied below - for him or you to correct. If this is for a college class, I would expect that the students would read and familiarize themselves with Wikipedia style and policies prior to adding. I have had high school students write articles before without problems (just requires a bit of supervision). Please have the students clean up their contributions or you do it for them. Thanks, Vsmith (talk) 17:16, 7 December 2007 (UTC)

And please sign your comments with four tildes. Vsmith (talk) 17:18, 7 December 2007 (UTC)

This was an adopt-a-mineral research paper for GEOL 3370, Dec 6, 2007, {name redacted}, Dr. Johnathan Snow, The University of Houston.

I just noticed this comment, I think I have to remove the article from here. You can write about afwillite, but you have to do it with your own words and it can't be a previously published paper, although that could be one source. Best regards Rhanyeia♥♫ 11:03, 7 December 2007 (UTC)

This is my paper, I wrote it and it took me time to post it. Now it looks like I will have to do it again. -{redacted} —Preceding unsigned comment added by Crw19 (talk • contribs) 15:33, 7 December 2007 (UTC)

Moved Crw19's version here for cleanup, wikifying and integration. The images are unusable w/out proper tags. Vsmith (talk) 16:38, 7 December 2007 (UTC)

(I hope you don't mind that I remove this next article text from here to make discussion easier, it's now again there on the other side.) Crw19, your message that the text is a research paper for The University of Houston, what does it mean exactly? Does this text count as published by that university or is it unpublished student work? I'm asking because if it already has a publisher it would need to be treated differently, but if it doesn't and you are ready to have it here then I guess it's fine. :) Best regards Rhanyeia♥♫ 08:56, 9 December 2007 (UTC)

It is unpublished, it was a term paper. —Preceding unsigned comment added by Crw19 (talk • contribs) 15:25, 9 December 2007 (UTC)

Ok, then this is solved. :) Good work. Best regards Rhanyeia♥♫ 16:48, 9 December 2007 (UTC)

Afwillite

The following copied from my talk for wider audience. Vsmith (talk) 23:37, 12 December 2007 (UTC)

Hello, Where it says, "Afwillite is one of the calcium silicates that form when Portland cement sets to form concrete.[6] The cement gets its strength from the hydration of its di- and tri- calcium silicates." That's wrong and every time I correct it, you change it back. Afwillite does not form as a result of the Portland cement setting. It is used to make Portland cement. Afwillite can occur as an alteration or by contact metamorphism. Its key significance is that it is used for making Portland cement. —Preceding unsigned comment added by Crw19 (talk • contribs) 05:53, 12 December 2007 (UTC)

Read the ref I provided. Afwillite is a rare mineral so how can it be a significant component in making such a common product? Also, take a look at the portland cement page - no mention of it there. Vsmith (talk) 11:57, 12 December 2007 (UTC)

Afwillite is rare, however, if you have access to Megaw H. D. (1952). The structure of Afwilltie. Acta. 5, 477. You will find that afwilite, is in fact used in Portland cement. —Preceding unsigned comment added by 98.200.30.26 (talk) 15:45, 12 December 2007 (UTC)

Pardon my jumping in. I don't have access to the Megaw paper, but other more recent documents indicate that afwillite has been used, in laboratory settings, to test improved setting rates in cements (without success, incidentally). Many, many sources indicate afwillite's presence as a product of cement crystallization, and none that I could find indicate it as an initial component of the mix, including AIME's volumes on Industrial Minerals and Rocks, virtually the bible for things like sources of materials for cement and uses of minerals. As Vsmith points out, even if sometime, someplace some afwillite was added to a cement mixture, its rarity means that is not possible for it to be routinely used on a large scale, and therefore such mention does not belong in the encyclopedia. Cheers Geologyguy (talk) 16:41, 12 December 2007 (UTC)

Can I see your sources?

This should probably be moved to the Afwillite talk page, but - google "portland cement" + components + afwillite --> only 99 hits, some of which are pay sites, but those that are not are about afwillite as a product of cement crystallization. Googling "portland cement"+ components (i.e., no mention of afwillite) gets 262,000 hits. The book I mentioned above is published by the AIME. Cheers Geologyguy (talk) 17:45, 12 December 2007 (UTC)