Talk:Carbon

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atomic weight of carbon

is the atomic weight correct? according to IUPAC is should be [12.0096; 12.0116] http://iupac.org/publications/pac/pdf/2011/pdf/8302x0359.pdf — Preceding unsigned comment added by 203.22.239.98 (talk) 21:57, 10 December 2012 (UTC)

Talk!

Resolved

 – "Case Closed: [first item -- typo]"

"thermodinamicaly" is a typo. Can somebody please fix it? 64.139.4.126 20:34, 30 November 2007 (UTC)

"In German and Dutch, the names for carbon are Kohlenstoff and koolstof respectively, both literally meaning "coal-stuff"."

For the dutch it is a wrong translation. "Stof" rather means (solid) substance than stuff. like a liquid is being called: "Vloeistof", a 'flowing substance'.

Why isn't lampblack/soot/charcoal counted as an allotropic form of carbon? It is a form that is not diamond, graphite or a fullerene. Of course, it isn't crystalline, but that's not a requirement of being an allotrope.

--user:jaknouse

Aren't they just graphite with impurities? -- Tarquin 11:04 Jan 22, 2003 (UTC)

Yes, it's just a mixture of several different allotropes.- (User) WolfKeeper (Talk) 06:00, 2 December 2007 (UTC)

Does anyone know if carbon nanotubes are considered an allotrope or if they are just a subset of buckyballs? Iammaxus 03:34, 23 Dec 2003 (UTC)

All fullerenes. --mav

All allotropes, by definition.- (User) WolfKeeper (Talk) 06:00, 2 December 2007 (UTC)

The Carbon Cycle

Carbon - in the form of differnet kinds of carbon-containing molecules - moves through an endless cycle. These are the stages of the carbon cycle. It begins when plants and algae remove carbon from the environment during photosynthesis. This carbon returns to the atmosphere via several carbon-cycle pathways.

A) Air contains carbon in the form of carbon dioxide gas. Plants and algae use carbon dioxide to make sugars, which are energy-rich, carbon-containing compounds.

B) Organisms break down sugar molecules me by plants and algae to obtain energy for life and growth. Carbon dioxide is released as a waste.

C) Burning fossil fuels and wood releases carbon dioxide into the atmosphere.

D) When organisms die, their carbon-containing molecules become part of the soil. The molecules are broken down by fungi, bacteria, and other decomposers. During this decay process, carbon dioxide is released into the air.

E) Under certain conditions, the remains of some dead organisms may gradually be changed into fossil fuels such as coal, oil, and gas. These carbon compounds are energy rich.

Graphene

Perhaps this should mention graphene (a single layer of carbon atoms) or reference the graphene page 211.30.190.160 10:35, 14 June 2007 (UTC)

Melting and boiling points?

The article currently claims that carbon sublimes instead of melting and also gives melting and boiling points. Clearly some information is missing. --Andrew 03:58, Apr 13, 2005 (UTC)

Missing... right now I'm having too much of it. I'm not an expert, but I've done a search for a phase diagram and adapted one for the article from a source that appears to know what they're talking about—particularly because it mostly contains ranges and estimates, not concrete numbers. Those seem to be a little more tricky:

The CRC handbook 84th ed. gives:

• For graphite a sublimation point of 3825 °C.
• For diamond a melting point of 4440 °C at 12.4 GPa.
• For graphite a triple point at 4489 °C and 10.3 MPa.

And in the elements section:

• For carbon a graphite-liquid-gas triple point of "4492°C at a pressure of 101.325 kPa" ?!, and it sublimes at 3642 °C.

According to Amazon.com's search inside this book, the "4492°C at a pressure of 101.325 kPa" also is in the 85th ed.
According to [1], the CRC 78th ed. apparently gave here:

• For carbon a melting point of ~3550 °C.
• Graphite sublimes at 3825 °C;
• A graphite-liquid-gas triple point at 4492 °C and 10.3 MPa
• A graphite-diamond-liquid triple point at (3830-3930) °C and 12-13 GPa

Lange's handbook, 15th ed. gives:

• For diamond a boiling point of 3930 °C.
• For diamond a melting point of 3500 °C at 63.5 atm.
• And graphite sublimates at (3915–4020) °C.

Huh.

I've put melting point="triple point, ca. 10 MPa<br />and (4300–4700) K" (from the diagram source), and boiling point="subl. about 4000 K" into the article, until somebody finds better data. Femto 12:28, 16 Apr 2005 (UTC)

Thanks! Wow. --Andrew 22:30, Apr 16, 2005 (UTC)

This is a disaster. The melting point and boiling points should be removed from the elements box. This information should be included as a separate paragraph in the entry, or as a separate entry into the mp and bp of carbon. What is in the element box is essentially useless with out the information above. I had edited it and then came to say something here and then decided to let someone else deal with it. Vargob 17:47, 21 February 2007 (UTC)

I agree this is a mess. As it is now, it makes it seem like the melting point is a higher temperature than its boiling point. This makes no sense at all. --Rkelly74 02:16, 23 October 2007 (UTC)

Big lumps of graphite

THe article doent seem to say where the big blocks of graphite (used in nuclear reactors) come from. Are they synthesised, or dug out of the ground?--Light current 10:44, 28 June 2006 (UTC)

They are always synthesized or purified to some degree and recompressed, since natural graphite always has too much boron and other impurities to be a good moderator. This was a key insight of Szilard which made the Chicago first atomic reactor possible. The Germans never did realize it during the war. SBHarris 01:45, 26 April 2007 (UTC)

History of Carbon is wrong.

According to http://www.pnas.org/cgi/reprint/0510489103v1, and http://www-phys.llnl.gov/pdf/1031204.pdf. Don't get me wrong I beleave the charcoal part should be left in.

"Elemental carbon has been known since prehistory,
and diamond is thought to have been first mined in India 2,000 years ago,
although recent archaeological discoveries point at the possible existence
of utensils made of diamond in China as early as 4,000 before Christ."

- Hamster2.0 04:48, 3 May 2007 (UTC)

I agree with this. Carbon does come in the forms of diamond, graphite and charcoal. I don't have any sources to back this up, but this is true. Charcoal is usually counted as not a form, but it is. Just one that is never overlooked. ☺Efansay^T/_C☺ 06:49, 16 June 2007 (UTC)

Boiling and Melting point are wrong

Someone put (?) question marks around it, it´s better to have nothing at all than erroneous facts.. —Preceding unsigned comment added by 89.54.36.239 (talk) 06:57, 9 September 2007 (UTC)

Finally, hopefully resolved after nearly 2 years of standstill with wrong data. :-( Unbelievable why noone else did this. Regards, Achim1999 (talk) 12:49, 25 July 2009 (UTC)

Carbon

The Carbon article has been nominated for the Wikipedia:Article Collaboration and Improvement Drive. Nergaal (talk) 20:25, 20 November 2007 (UTC)

I found melting points

Carbon =(diamond) C 3550 Carbon =(graphite) C 3675 Carbon =(amorphous) C 3675 —Preceding unsigned comment added by 65.92.202.105 (talk) 23:42, 5 December 2007 (UTC)

any reference? Nergaal (talk) 00:36, 6 December 2007 (UTC)

Abundance of carbon mineral

The following statement is provided unreferenced and I could find nothing to confirm it.

Coal is the main source of carbon in mineral form, containing up to 86% of carbon in anthracite.

I'm not sure the statement is correct. I believe there are more abundant carbonates in the Earth's crust, for example, which is the second most abundate mineral group after the silicates—especially calcite and dolomite. (Although anthracite is probably one of the most carbon-rich minerals.) This change was added March 28, 2007 by User:Freecat. — RJH (talk) 20:59, 21 November 2007 (UTC)

While carbonates contain carbon, they are probably not the main [practical] sources of [elemental] carbon. As an analogy, think of the statement "air is the main source of [elemental] oxygen", which is true, despite the fact that most oxygen on earth is bound on minerals or water. --Itub (talk) 13:27, 6 December 2007 (UTC)

The "practical" source of CO2 gas and dry ice is not the air directly, but the fermentation of sugar to make alcohol. One might also reflect on the fact that the lime that goes into portland cement is produced by driving CO2 from limestone back into the atmosphere (from whence it once came) using the combustion of fossil fuels as energy source - resulting in a very high carbon footprint, if practicality is the issue herePlantsurfer (talk) 14:45, 6 December 2007 (UTC)

I thought we were talking about carbon, not carbon dioxide. --Itub (talk) 17:05, 6 December 2007 (UTC)

reference for infobox

I found this great website and I wanted to reference stuff in the infobox. Unfortunatelly I screw up entries.Can someone else do it instead? Thanks! Nergaal (talk) 22:54, 7 December 2007 (UTC)

Abundance of carbon in Earth's crust

I removed the sentence regarding carbon as the sixth most abundant element in the earth's crust because it had a "citation needed" note and upon googling it doesn't even show up in the top 10 most abundant elements (by weight).[2] --Wizard191 (talk) 04:36, 5 January 2008 (UTC)

South Korea production

There's a wrong sentence about natural graphite. In South Korea, most (more than 99%) of graphite is imported. —Preceding unsigned comment added by 150.150.114.124 (talk) 02:25, 18 April 2008 (UTC)

According to this USGS report, North Korea was the 4th largest producer of graphite in the world, after China, India, and Brazil. I'll change the article to reflect this. Cheers Geologyguy (talk) 02:47, 18 April 2008 (UTC)

Semi-protect the page?

this article recieves a large amount of vandalizations from unregistered users. It might be a good idea to semi-protect it.Nergaal (talk) 01:55, 26 January 2008 (UTC)

Diamond decay

I've heard various sources say that diamonds decay into graphite at standard conditions, and others say that they don't. Can anyone find a source that gives the actual rate of decay? Presumably it can be calculated by knowing the activation energy and assuming a probability distribution for heat energy available to individual atoms. -- Beland (talk) 19:09, 11 June 2008 (UTC)

It depends on the value of the activation energy. I don't think it is known accurately, but I've seen some estimates in the range of 70-100 kcal/mol. That is huge. At room temperature, it corresponds to a half-life that is orders of magnitude longer than the age of the universe. At 1000 degrees you might have a reasonable rate. --Itub (talk) 06:01, 12 June 2008 (UTC)

Broken Reference

I removed a broken reference named "hershey" from the article. Possibly the ref was broken due to vandalism but as far as I could tell it was never working in the first place. --Megaboz (talk) 18:25, 9 September 2008 (UTC)

Conflicting abundance numbers

There are several conflicting numbers in the abundance section about hydrocarbons. At first it talks about reserves of 900GT, then, in the next paragraph, it talks about 4000GT of carbon suitable as fuel. And the the little floating box at the side talks about 13.2 x 10^6 GT of Carbon in the form organic compounds in the upper crust. This is totally confusing and needs to be corrected, explained better, or removed. --Dio1982 (talk) 15:16, 23 October 2008 (UTC)

Melting Point/Boiling point

I have been doing some research and found that 3652degC is the melting point of Carbon and that 4827degC is the boiling point. I don't see these figures mentioned anywhere in the article so I'm wondering whether they are accurate or not. The same website stated that graphite had a melting point of 3500degC so this could also be mentioned if it is correct. I have listed my reference here: [3] Bonzostar (talk) 17:56, 6 November 2008 (UTC)

Where the hell have the melting point and boiling point went!!!

Dannyboy1209 (talk) 15:34, 22 February 2011 (UTC)

Gone to hell no doubt... Please see the discussion above entitled "Melting and boiling points?" Vsmith (talk) 16:04, 22 February 2011 (UTC)

General comment about elemental photos

I'm wondering out loud why many of the photos of samples of major elements in the infoboxes seem to be grainy, badly lit, low resolution images that don't really give much of an idea of what it really looks like close up. Is anyone with access to elemental samples able to take some better photos? (Apologies to user RTC who at least has taken the trouble to upload the current ones). --CharlesC (talk) 23:56, 23 January 2009 (UTC)

I have a set o' elements and took a photo of one for the yttrium article. But I'd like to wait until I get a new camera or at least a much better macro lens before I start up a production line; just to make sure I get better resolution and don't have to GIMP the image as much. --mav (talk) 23:39, 7 March 2009 (UTC)

Standard Atomic Weight is wrong

The standard atomic weight shown is wrong: should be 12.01 approximately. 6 is the element number not the standard atomic weight. —Preceding unsigned comment added by Arthur Merlin (talk • contribs) 00:21, 20 March 2009 (UTC)

It's actually 12.0107, but I think I'm nitpicking here. --116.14.27.127 (talk) 08:46, 3 June 2009 (UTC)

The density of Carbon is incorrect.

The density of Carbon, at 0°C and 1atm, is stated incorrectly to be 2.267 g/L (that density is extremely low, meaning diamonds would float on water for example).

At 0°C and 1 atm, pure Carbon can exist in three forms:

1) Graphite, specific gravity: 2.26

2) Diamond, specific gravity: 3.51

3) Amorphous, bulk density: 1.8-2.1 g/cm³

From the Chemical Rubber Company Handbook of Chemistry and Physics, 59th Edition, CRC Press, Inc, 1979.

Harting (talk) 11:20, 24 March 2009 (UTC)

Correct, so why not modify the article accordingly. Plantsurfer (talk) 17:51, 24 March 2009 (UTC)

Sadly the article is semi-protected and I have not been around long enough to be allowed to edit it. Harting (talk) 16:31, 26 March 2009 (UTC)

The data is actually housed at {{infobox carbon}}, which is not protected from editing. I made the suggested changes there. Please check me, to be sure that it is correct now. ChemNerd (talk) 19:58, 26 March 2009 (UTC)

OK, but the value for diamond was wrong, and I have edited it to list the allotropes in ascending order of their density. Plantsurfer (talk) 20:30, 26 March 2009 (UTC)

I've changed the density of graphite to the exact reported in the source book. It's quite old, but then densities of compounds don't exactly change. Harting (talk) 14:31, 27 March 2009 (UTC)

Specifying a density for amorphous carbon is very misleading. Depending on the sp2:sp3 fraction it can vary greatly. Diamondlike amorphous carbon can be grown by ion beam deposition with densities reaching 3g/cm³. Specifying a range would thus be more appropriate. --Dschwen 15:42, 27 March 2009 (UTC)

You are right. It is usually quoted as a range. The lowest number I've ever come across is 1.8. So a range of 1.8 to 3 seems to be at least achievable. As it isn't a physical constant, maybe it should be omitted from the info box.Harting (talk) 12:53, 30 March 2009 (UTC)

For the time being I've changed the number to the range that is quoted in the source text. If someone has a reference to a more modern up-date reference then I'd gladly change it again. Harting (talk) 13:13, 31 March 2009 (UTC)

Life on Earth

The article states:

Carbon compounds form the basis of all life on Earth...

Huh? According to Wikipedia's article, we don't even have a good definition of life! Even if we did, it's not entirely clear (at least from what I've read) that we know about all life on Earth. Brian Jason Drake 13:09, 24 April 2009 (UTC)

I shall reply to that on User_talk:Brianjd where it belongs.NIMSoffice (talk) 23:20, 24 April 2009 (UTC)

Though I disagree that it belongs there, I have responded there. Brian Jason Drake 02:14, 30 April 2009 (UTC)

I must agree, per WP:TALK, such a discussion is perfectly appropriate here. User talk is for one-on-one discussions. This however, is a discussion about the article, which belongs here so others can view it and participate in the discussion.

The claim of carbon forming the basis for all life on Earth should be properly sourced. We could also soften the claim by saying "all known life", just in case there are any silicon based lifeforms hiding somewhere we haven't found. But I wouldn't call the claim dubious in it's current form. While there are things we are not sure about, we do not have reasonable doubt regarding the claim. -Verdatum (talk) 17:04, 4 May 2009 (UTC)

I softened the statement in the article (it is minor, and can even be deleted). IMHO the discussion belongs to the articles on life, not on carbon. NIMSoffice (talk) 00:02, 5 May 2009 (UTC)

Shouldn't Carbon also be in Category:Biology and pharmacology of chemical elements ? Eldin raigmore (talk) 18:16, 16 May 2009 (UTC)

Eldin, please be bold. If you feel it should be in that category, why not insert it yourself? Double sharp (talk) 08:49, 3 June 2009 (UTC)

Abundance of Carbon

"Carbon is one of the least abundant elements in the Earth's crust, but the fourth most abundant element in the universe by mass after hydrogen, helium, and oxygen."

According to the linked table, Carbon is the 15th most abundant element among the 82 stable or semi-stable in the earth's crust, not one of the least abundant. Indeed, it ranks above sulfur and chlorine, which are pretty abundant.--Syd Henderson (talk) 05:31, 18 September 2009 (UTC)

Thanks. Fixed that. Materialscientist (talk) 01:12, 16 October 2009 (UTC)

Characteristics/Extremes

The first section ends with “The system of carbon allotropes spans a range of extremes:” followed by a table comparing diamond and graphite. One of the entries is “Diamond crystallizes in the cubic system. Graphite crystallizes in the hexagonal system.” I agree that's a difference, but I don't see how it's “two extremes”. bogdanb (talk) 18:22, 20 January 2010 (UTC)

"Extremes" here refers to other properties, certainly not to the crystal symmetry, and is simply an emphatic word, which can be replaced. Materialscientist (talk) 22:49, 20 January 2010 (UTC)

ancient charcoal

surely carbon in the form of charcoal was known before the time of the Romans?(history section)195.188.41.154 (talk) 11:16, 4 February 2010 (UTC)

Timeline of chemical elements discoveries says around 3700 BC "Earliest known use of charcoal for the reduction of copper, zinc and tin ores in the manufacture of bronze, by the Egyptians and Sumerians." Charcoal can exist in nature and could be used by the earliest human civilizations if discovered. It seems charcoal wasn't made until around Roman times(earliest known manufacture). JTTyler (talk) 07:52, 26 March 2010 (UTC)

Carbon Used in Steel

I believe that this article deserves a small section on the use of carbon is production of steel; the identification of carbon and its use in steel was a major industrial and scientific achievement. For example, samurai swords were produced by carbon refined from river sediments. This and other examples of carbon refinement and application lead to a metal that we now use in, "buildings, infrastructure, tools, ships,automobiles, machines, appliances, and weapons." (See Steel) This discovery of carbon for steel could even be considered more significant than the demonstration of steel production by René de Réaumur in 1722, especially because earlier steel use has occurred during the 4th century BC (while steelwork itself dates back nearly four thousand years ago). (See http://en.wikipedia.org/wiki/Steel#History_of_steelmaking)

If these discoveries are insignificant or irrelevant, I believe that a link at least should be provided in the History section of the article for Carbon.

Adam zappul (talk) 05:31, 6 June 2010 (UTC)

Carbon - largest number of compounds

The article states that carbon produces more compounds than any other element and cites the millions of organic compounds in evidence. But every organic compound also contains hydrogen So the "accolade" for most compounds must surely be whichever of hydrogen and carbon produces the most inorganic compounds without the other being present. Are there more hydrides and inorganic acids than there are carbides and carbonates? I don't know the answer!

Should it be deemed that Carbon does indeed have more compounds than hydrogen then the evidence cited needs to be changed to reflect this. Eccleshill (talk) 08:39, 15 July 2010 (UTC)

Hydrogen is not the basic structural element of hydrogen-containing compounds. Materialscientist (talk) 08:52, 15 July 2010 (UTC)

That is not the issue - the issue is the number of compounds that are formed not the function of the element in those compounds. Eccleshill (talk) 09:12, 15 July 2010 (UTC)

It is the issue - hydrogen does not form those compounds, it is part of these compounds. Materialscientist (talk) 09:16, 15 July 2010 (UTC)

Perhaps we are at the level of linguistic semantics! A compound must by definition contain more than 1 element; carbon cannot form "compounds" alone; it forms compounds with hydrogen; hydrogen forms compounds with carbon. The compounds are formed from carbon and hydrogen therefore surely they form compounds in equal number. Eccleshill (talk) 09:38, 15 July 2010 (UTC)

In Our Time

The BBC programme In Our Time presented by Melvyn Bragg has an episode which may be about this subject (if not moving this note to the appropriate talk page earns cookies). You can add it to "External links" by pasting * {{In Our Time|Carbon|p003c1cj}}. Rich Farmbrough, 03:01, 16 September 2010 (UTC).

Incremental Alpha particle mass value calculations

If a regression analysis of incremental alpha particle mass increases to the atomic structure is carried out and then used to estimate the fit of the reported AMU mass values to the best fit line, the reported value of 12.0000 for EE6C12 is noted to fall bellow the best fit line (third order) by more than the EE8O16 value. Could this indicate a bias such that the estimated AMU values of the heavier elements is overestimated?WFPM (talk) 15:41, 22 January 2011 (UTC)

Small glitch

Something has gone wrong here:

"In 1779, Carl Wilhelm Scheele showed that graphite, which had been thought of as a form of lead, was instead a type of carbon. In 1786, the French scientists Claude Louis Berthollet, Gaspard Monge and C. A. Vandermonde then showed that this substance was carbon." —Preceding unsigned comment added by 86.177.106.149 (talk) 01:52, 4 May 2011 (UTC)

Yes. The latter group of chemists burned graphite in oxygen and found that it was MOSTLY the oxide of a new element that they called "carbon" (Scheele had done the same by oxidizing graphite to CO2 in nitric acid, but he called CO2 aereal acid and was still working in the phlogiston theory so did not really regard it as an oxide of anything primary). Both groups found some residual iron, but the Frenchmen thought there was enough to think graphite a carbon-iron compound. Scheele did not make that mistake. Lavoisier had found diamond to contain nothing that didn't produce CO2, so he accepted "carbon" as the name of the element being oxidized when burned in oxygen. SBHarris 03:56, 4 May 2011 (UTC)

Application

More applications should be listed...such as the use of carbon filament for light historically.Smallman12q (talk) 20:39, 27 June 2011 (UTC)

Also...there's also no article for a astatine carbon bond...which is the subject of some research.Smallman12q (talk) 23:53, 11 July 2011 (UTC)

carbon platinum only academic

maybe I misread the very nice periodic table, but I saw Carbon platinum as of academic interest only. I may be wrong, but arent compounds like cisplatin of importance, and don't they have carbon pt bonds ? — Preceding unsigned comment added by 68.236.121.54 (talk) 14:22, 28 October 2011 (UTC)

Cisplatin is an important compound, but it doesn't contain any carbon atoms, much less C–Pt bonds. Double sharp (talk) 03:14, 12 June 2012 (UTC)

GA Review

This review is transcluded from Talk:Carbon/GA1. The edit link for this section can be used to add comments to the review.

Reviewer: Geo7777 (talk) 18:12, 2 July 2011 (UTC)

I will review, but I might miss a few things and mistakes (especially the references). I'll divide the review into sections, and write for each one. At the end of the review page I will put the criteria for the good article.

Charecteristics

• "Carbon also has the highest melting and sublimation point of all elements. At atmospheric pressure it has no melting point as its triple point is at 10.8 ± 0.2 MPa and 4600 ± 300 K,[2][3] so it sublimates at about 3900 K.[15][16]" It says that it has the highest melting point of all of the elements, then contradicts itself by saying it has no melting point. Anything to reword, mabye putting its melting point under a certain pressure? (unless it will still sublime, them mabye put that it doesn't have one because it sublimes)

• Mabye put the temperatures in degrees celsius too (and farenheight)? Just for people who might not know the kelvin scale or don't understad a given temperature's degree of heat or coolness?(?) in kelvin like not knowing that 100 K is like way below freezing temperatures.

• "Although thermodynamically prone to oxidation, carbon resists oxidation more effectively than elements such as iron and copper that are weaker reducing agents at room temperature." source? and just asking, why are its properties being compared so much to metals even though it is a nonmetal? The difference between metals and nonmetals is very great already such as brittleness, refractivity, flexability, tendance of different states of matter...

• from the text "It does not react with sulfuric acid..." to the text "...C(s) + H2O(g) → CO(g) + H2(g)." in the third para. Put a source for its reactions with the compounds and the substances with which it doesn't react.

That's all for now. I'll be back soon with more remarks. --Geo7777 (talk) 15:00, 30 June 2011 (UTC)

Ok, I'm back, I'm continuing with where I left off.

allotropes

Just fine.

Occurrence

Ok, except for two things:

• Coal is a significant commercial source of mineral carbon; anthracite containing 92–98% carbon[39] and the largest source (4,000 Gt, or 80% of coal, gas and oil reserves) of carbon in a form suitable for use as fuel.[40] unclear. Reword?

• in the fifth, sixth, and seventh paragraph, can you put a source for each of them?

The rest is fine.

Isotopes

Perfect.

Formation in Stars

good, but fix the "citation needed" template in the last paragraph.

done for this time :)--Geo7777 (talk) 18:12, 2 July 2011 (UTC)

Carbon Cycle

Nice

Compounds

Organic Compounds

The wording and prose is fine, but the one thing that directly caught my sight was that there was no sources for all of the papagraphs. please fix them so they can be at least one ref. per para.

Inorganic Compounds

Awesome

I'll be back for more... :) --Geo7777 (talk) 18:12, 2 July 2011 (UTC)

I'm back, so i will pick up where i left off.

Organometallic compounds

Good.

History and etymology

Very good.

Production

Graphite

good, even though at first it seemed that there was only one ref. until i looked through the ref. and saw it had all of the info placed.

Diamond

A good subsection.

the rest of the paragraphs, after a thorough look through them, are of good article quality. Now I will check the lead against the criterion 1b. Geo7777 (talk) 04:47, 6 July 2011 (UTC)

1. Is it reasonably well written?

   A. Prose quality:

   B. MoS compliance for lead, layout, words to watch, fiction, and lists:

2. Is it factually accurate and verifiable?

   A. References to sources:

   B. Citation of reliable sources where necessary:

   C. No original research:

3. Is it broad in its coverage?

   A. Major aspects:

   B. Focused:

4. Is it neutral?

   Fair representation without bias:

5. Is it stable?

   No edit wars, etc:

6. Does it contain images to illustrate the topic?

   A. Images are copyright tagged, and non-free images have fair use rationales:

   B. Images are provided where possible and appropriate, with suitable captions:

7. Overall:

   Pass or Fail:

Congratulations, Carbon is now a Good article!!

Liquid

Is it possible to create liquid carbon? 174.20.186.136 (talk) 01:19, 16 July 2011 (UTC)

I don't see why not. You just need the right temperature and pressure. Lanthanum-138 (talk) 08:59, 6 August 2011 (UTC)

History in the infobox

I'm working on entering the discovery details into the infoboxes of all the elements. I was planning on entering the following:

Discovery: Antoine Lavoisier (1789) 
Earliest known use: Egyptians & Sumarians (3750 BC)

Is the meaning understood here? That it was 'discovered' when it was recorded as an element? Or does it look paradoxical to have the earliest known use before it was 'discovered?Nozzleberry (talk) 21:49, 26 June 2012 (UTC)

Diamond Production Map Flawed

The modifications that are made to the map of global diamond production, have made the Russian production (which is the biggest in the world) invisible!

Must be reverted to the previous version of the map — Preceding unsigned comment added by 83.183.113.247 (talk) 19:31, 22 August 2012 (UTC)

Reverted, thanks. Materialscientist (talk) 22:35, 22 August 2012 (UTC)

Edit request on 6 November 2012

IMPRECISION:...diamond has the highest thermal conductivity of all known materials.

►...diamond, carbon nanotube and graphene have the highest thermal conductivity of all known materials. 84.221.87.54 (talk) 00:22, 6 November 2012 (UTC)

Changed, thanks. Materialscientist (talk) 00:32, 6 November 2012 (UTC)

Edit request on 26 November 2012

I am a Phd student in chemistry and would like to make minor changes to this article as well as others on the subject, I intend to document all changes with peer-reviewed, edited references and am happy to defend why I feel these changes would be necessary. Spire music (talk) 23:20, 26 November 2012 (UTC)

Sorry, but you need to suggest a specific edit. See your talk page. Vsmith (talk) 23:58, 26 November 2012 (UTC)

Edit request on 2 April 2013

Under precautions section.

Grammar error in: "carbon nanoparticles are a deadly toxins to"

Remove the "s" at the end of "toxins" or remove the "a" in front of "deadly". Idenshi (talk) 16:18, 2 April 2013 (UTC)

Done (more or less). I also split up the run-on sentence and changed "toxins" to "toxic", since the construction "toxins to" seemed awkward. Rivertorch (talk) 16:57, 2 April 2013 (UTC)

Semi-protected edit request on 28 January 2014

The article does not throw enough light on extra terrestrial occurrence of carbon. What I want to focus on is that carbon-rich asteroids are relatively preponderant in the outer parts of the asteroid belt in our solar system. Please add this information to this page. Sometimes, meteorites originating from that part of our solar system may have high amount of carbon. This information can help us to understand the presence of carbon in planets like Mars and Venus, which are nearer to the asteroid belt. However, carbonaceous asteroids have yet not been sampled directly by scientists. These asteroids can help in space-based carbon mining; however this seems to be only a scientific but fictitious possiblity with our present day technical know-how. For details, refer to Charles R. Nichols's article at http://www.uapress.arizona.edu/onlinebks/ResourcesNearEarthSpace/resources21.pdf Arghyan Opinions (talk) 07:13, 28 January 2014 (UTC) Arghya Ray

Done at bottom of "Occurrence" Dmelc9 (talk) 18:33, 31 January 2014 (UTC)

Semi-protected edit request on 1 March 2014

Please change '6.155 (diamond)\n8.517 (graphite) J·mol−1·K−1' in Molar Capacity with 'Diamond: 6.155 J·mol−1·K−1\nGraphite: 8.517 J·mol−1·K−1', because current formatting is not correct. Lubomir Kucera (talk) 17:22, 1 March 2014 (UTC)

Not done: please establish a consensus for this alteration before using the {{edit semi-protected}} template. It's been that way for well over two years now and I do not see any requests to change it before this. Please either show where in the MOS the formating is defined that current usage is incorrect. Thanks. — {{U|Technical 13}} ^{(t • e • c)} 17:39, 1 March 2014 (UTC)

Greek name origin

I have a very small point which I think should still be changed: the Greek word γραφω means "I write". "to write" like the article says would be "γραφειν". I don't care which form we choose but the English translation should match the Greek.Sbreheny (talk) 17:25, 10 April 2014 (UTC)