Talk:Cementite

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Charge of Fe?[edit]

Since carbide ion is 4- (when there is one carbon), what are the charges on the 3 Fe ions? Are they +1,+1 and +2? Or is there an error?RSido 01:25, 14 November 2007 (UTC)

I'm not convinced that you can assign clear oxidation numbers to the atoms in this structure. You might as well assign 0 to all atoms and think of it as an alloy! --Itub 19:22, 14 November 2007 (UTC)
See my formula. -lysdexia 11:03, 13 March 2008 (UTC)


Composition in Weight Ratios[edit]

There is no mention of the composition in terms of percentage weight of carbon and iron for cementite in eutectoid structures. This is a pretty important number for applications in material science, the application with which information abut this substance is primarily concerned. I just think if people are looking up this article, it may very well be to find this value (its the reason I looked it up). Anyone have any thoughts regarding this? If no one has any complaints I'll add it within a day or two.Tracorn (talk) 07:21, 8 May 2009 (UTC)

Reaction with acids[edit]

Does anyone have some information on how cemetite reacts with acids on dissolution of steel. Will there be a carbon residue? Will it form methane? Will oxidizing acids convert it to carbon dioxide? —Preceding unsigned comment added by 150.227.15.253 (talk) 13:59, 24 September 2010 (UTC)

Mass of Fe3C ?[edit]

After research, i could not find the volumic mass of Fe3C anywhere. Could someone please indicate it ? — Preceding unsigned comment added by 195.83.11.66 (talk) 15:06, 9 April 2013 (UTC)

Earth's inner core contains significant iron carbide, suggests study[edit]

Hidden carbon in Earth’s inner core revealed by shear softening in dense Fe7C3

Bin Chen, Zeyu Li, Dongzhou Zhang, Jiachao Liu, Michael Y. Hu, Jiyong Zhao, Wenli Bi, E. Ercan Alp, Yuming Xiao, Paul Chow, Jie Li.
Proceedings of the National Academy of Sciences, 2014; 201411154
DOI: 10.1073/pnas.1411154111

2.98.241.120 (talk) 06:43, 3 December 2014 (UTC)