Talk:Allotropes of iron

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Ferrite, austenite and iron[edit]

Alpha-iron and alpha-ferrite, gamma-iron and austenite, delta-iron and delta-ferrite are not synonymous!!! I corrected the wrong sentences in the text, be careful about it. --Aushulz (talk) 14:02, 11 September 2010 (UTC)

I agree with you on gamma iron and austenite. Austenite almost always refers to the solid solution of gamma iron and carbon, which has different properties than gamma iron alone. However, with the rest, the differences between the terms is somewhat archaic. In modern terminology, alpha iron and alpha ferrite are the same. In older terminology, (late 1800s to early 1900s), alpha ferrite was considered a pure allotrope of iron, whereas alpha iron was supposedly a solid solution of alpha ferrite and carbon, also called troostite (another archaic term). The same with beta iron and beta ferrite, except the solid solution of beta ferrite and carbon was called either beta iron or martensite. Nowadays, ferrite and iron are used almost synonynously, and the metastable "solution" (whether in beta or alpha) is called martensite. But the distinction between gamma iron (gamma ferrite) and austenite remains. Zaereth (talk) 21:10, 20 June 2012 (UTC)

Inner core structure[edit]

It says that at the inner core conditions iron is believed to be in the hcp structure and gives only one scientific reference for this, from 1995. I am not really from the field, and it could be that I do not see the whole spectrum of current thought, but to me it seems as if in recent times the consensus goes more into bcc, see, e.g. L Vocadlo et al., Nature 424, 536 (2003), AB Belonoshko et al., Nature 424, 1032 (2003) and W Luo et al., PNAS 107, 9962 (2010), and that bcc is even favoured by the alloying of light elements, expected to be S and Si. Seattle Jörg (talk) 14:41, 25 March 2013 (UTC)

I don't have much knowledge of the lattice arrangement of solid iron in the Earth's core, but this article is woefully lacking in information about it. Keep in mind that it is theoretical, and the various theories should be explored. This article could really use more in-depth analysis, and perhaps an entire section about it. If you have any information to add, and reliable sources that you can cite, then your help would be appreciated. Zaereth (talk) 00:55, 28 March 2013 (UTC)

Consistency & Curie[edit]

The previous paragraph gives a different set of values: 'Curie temperature of 771 °C (1044K or 1420 °F)" It's only one degree but every mention of the curie temp should have the same value. Michael McGinnis (talk) 03:31, 30 December 2016 (UTC)

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