Talk:Iron(III) oxide

JMOL 3D image

Does not look right, 3D image is flattened, has no third dimension? Not sure how to change that section, it should be removed. — Preceding unsigned comment added by 68.151.5.169 (talk) 18:25, 5 December 2012 (UTC)

Thermite

Why does this page say that Iron(III) oxide is used in thermite, when it actually seems more likely that the oxidation state of 2 for Iron would be used in this reaction(because it is combustible)? See the article on Iron(II) oxide.

In the thermite reaction the iron oxide NOT burning in oxygen, so combustibility is not an issue. Rather, the iron oxide is an oxidising agent, which oxidises aluminium metal to aluminium oxide. For this purpose the more strongly oxidising iron(III) oxide is preferred, though iron(II) oxide probably still works. Also, iron(III) oxide is much commoner, and that is probably a factor as well.

Believe me this does work! When I was in high school we had a student doing Al/Fe₂O₃ thermite reactions on Parents Day. He was grinding up his mixture (about 250 grams!) when the headmaster + several parents were in the lab, and the whole lot went up, destroying the boy's shirt and filling the lab with thick smoke. No one hurt, but rather embarrassing, and rather dramatic.....! Walkerma 22:15, 16 November 2005 (UTC)

I have added a reference to back this up, sorry it's from 1945! Most modern books shun descriptive chemistry like this, unfortunately. I have removed the disputed notice. There was a (hidden) comment disputing a bold claim about Fe2O3 magnetic storage being #1, I have hidden this section because there are no refs to back it up. I suspect that it was true at one time, but in the days of CDs and DVDs it may well no longer be true. If someone has a reference to back it up then it is there ready to put back in. Walkerma 22:43, 16 November 2005 (UTC)

Iron(II) oxide will work in a thermite reaction, but it is rarely available in a lab! It will slowly oxidise in air to magnetite. Physchim62 (talk) 04:44, 17 November 2005 (UTC)

I'm a physist, and my comment might therefore be misplaced. However, it seems to me that the article confuses two iron oxide minerals (hematite and magmhemite), which in fact have the same chemical formula, but which differ widely in properties and applications. For instance hematite is antoferromagnetic or weakly ferromagnetic and has a hexagonal structure, whereas maghemite is ferrimagnetic and has a cubic/spinel structure. jarihj

29 December 2005

HELP

okay, so we know that Iron Oxide is Fe2O3 ... but whats the actually Balanced Equation????? I know the wording equation (Iron + Oxygene = Iron Oxide), but what is the balanced equation. Fe02 ... but how much of Fe? I cant work it out. I'm a yr9 student, and i really need to know to finnish my corrosion and risting project. Thanks - Lilly Harrington --124.178.99.18 12:09, 30 July 2006 (UTC)Lilly Harrington

Sorry, we can't do your homework for you. It's aFe + bO₂ → cFe₂O₃, and you have to figure out what a, b, and c are so that both sides have the same number of both kind of atoms. —Keenan Pepper 22:44, 30 July 2006 (UTC)

What about Body disposal? — Preceding unsigned comment added by 99.181.210.112 (talk) 03:09, 8 February 2012 (UTC)

Poop

Is poop really the term? the article mentioned a very fine poop used in rouge, but this really didn't make sense to me. Could it be vandalism or am I missing a really technical term? I substituted "precipitate" RSido 00:48, 8 November 2006 (UTC)

No it isn't the term - if you look the previous edit was an anon changing "powder" into "poop". How hilarious of them, I've never seen anything so funny on Wikipedia before. If you see something like that, look at the history and check the recent edits - words like "gay" and "poop" or obscenities are nearly always vandalism. Fortunately the bots usually find them. Thank you for catching that, which obviously slipped through! Walkerma 07:55, 8 November 2006 (UTC)

The three Is

Hi. I don't know how I ended up here, but the only thing I was interested in finding out isn't mentioned on the page. Could someone add a short paragraph explaining what the three IIIs in iron(III) oxide mean for those initiates such as I? Thanks. Dennywuh 01:00, 12 December 2006 (UTC)

It is a Roman numeral 3, and it indicates that the oxidation state of the iron here is +3. If you write it as an ionic structure, that means the iron has a charge of +3. There is another iron oxide where the iron has a +2 oxidation state, and that is called iron(II) oxide. Walkerma 02:55, 23 March 2007 (UTC)

iron(III) solutions

Anyone got any ideas on how to make iron(III) solutions??

Decomposition

Can someone add the decomposition for iron (III) oxide? —Preceding unsigned comment added by 220.255.7.186 (talk) 13:50, 28 April 2009 (UTC)

Phase name flatchantala

What is this? I think it is the epsilon-phase. Waht means flatchantala, I never heard it before. Jürgen (07 March 2012)153.96.149.2 (talk) 13:41, 7 March 2012 (UTC)

 — Preceding unsigned comment added by Qdiderot (talk • contribs) 10:39, 19 March 2012 (UTC) 

This was vandalism from Jan. 2012. The vandalism has been reverted.Ggpauly (talk) 02:23, 7 June 2013 (UTC)

thermite casting

Is there really a need for citation at the end of this paragraph from the article?

This process is used to weld thick metals such as rails of train tracks by using a ceramic container to funnel the molten iron in between two sections of rail. Thermite is also used in weapons and making small-scale cast-iron sculptures and tools.[citation needed]

I assume the doubted claim is the one about thermite being used to make sculptures and tools. I have used thermite to cast jewelry - I used the commercially available cadwelding material to produce a pair of copper alloy rings for my wife and I. I even took pictures if there's any doubters. The rings were nice enough but not really what the wife wanted and the copper turned my skin green. the point is though that metal casting can be and is done with thermite. Qdiderot (talk) 10:46, 19 March 2012 (UTC)

oxides in oxygen busters ?

Hi, I found out from the technical sales guy at Dessicare that the oxygen busters that they use in food products have iron in them which oxidises over time and then becomes Iron Oxide II and Iron Oxide III - I would like to know if this can be added to soil in my garden (and everyone's gardens) and if it is fine to do so. The main purpose is to promote some reuse of the oxygen busters (but cutting them open to get the iron out) as the are so prolific now and I hate that they cannot be recycled at all. Any help appreciated. Plmoknqwerty (talk) 10:43, 16 September 2012 (UTC)

Hematite melting point

The article claims that hematite doesn't melt, it decomposes at 1566 degrees C. Decomposes to what? Further, other websites give a melting point for hematite of around 1566 degrees:

http://www.reade.com/Products/Oxides/hematite.html, http://eprints.ru.ac.za/252/3/PUBLICATIONS/JTAC65.pdf, http://www.reade.com/home/704, http://www.espimetals.com/index.php/msds/150-iron-oxide-red-fe2o3, http://www.pestell.com/msds/Red%20Iron%20Oxide.pdf. The 2011-2012 Rubber Handbook gives a melting point of 1539 deg. C. In line with the first reference I've listed, I suspect that someone confused melting point and boiling point information.

However, I'm not certain of this. While I'm going to change the article, I hope someone with more chemical knowledge will check into this.Saintonge235 (talk) 08:17, 11 December 2012 (UTC)

Restored as your edit made it invisible - the infobox syntax is touchy that way. As to the specific temp, don't know. I would be dubious of the boiling point w/out specifics, and likely decomposes well below a bp depending on containing atmosphere ... Vsmith (talk) 11:39, 11 December 2012 (UTC)

Infobox flag

The Chemspider identifier is flagged in the infobox, however the number seems to be correct - see http://www.chemspider.com/Chemical-Structure.14147.html

Perhaps this has already been corrected but the flag has not changed. Is the flag supposed change automatically? If the flagged item is corrected without removing or changing the flag it will waste the time of other editors. The "verify" link at the bottom of the infobox goes to this page: http://en.wikipedia.org/w/index.php?title=Special:ComparePages&rev1=464185021&page2=Iron%28III%29+oxide, however it's not clear to an uninitiated editor how to indicate on this page that the Chemspider identifier seems OK and the flag should be changed or removed.

Really, this flag business seems like inside baseball. If the flags are not publicly changeable, why make the flag links and instructions publicly visible? Isn't this against the spirit of a publicly editable encyclopedia? Ggpauly (talk) 02:26, 7 June 2013 (UTC) — Preceding unsigned comment added by Ggpauly (talk • contribs) 02:19, 7 June 2013 (UTC)

magnetic properties (or structure) of gamma-Fe2O3

afaik maghemite is actually ferrimagnetic and not ferromagnetic 132.187.16.195 (talk) 20:05, 27 August 2014 (UTC)

"🜞" listed at Redirects for discussion

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Move discussion in progress

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Does it dissolve in water?

No 202.55.188.93 (talk) 06:12, 5 April 2024 (UTC)