Talk:Metallic hydrogen

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Adapted from an writeup for Everything2.com

Homenode: http://www.everything2.com/index.pl?node=tlogmer

The Law of Charles and Gay-Lussac is not applicable here because we're far from an ideal gas. Removed. 193.171.121.30 00:22, 6 Dec 2004 (UTC)

Isn't metallic hydrogen an allotrope of hydrogen? If so, it seems like that ought to be mentioned in the article... TerraFrost 02:59, 27 Feb 2005 (UTC)

Solid metallic hydrogen at room temperature (if possible) would not be useful for making lightweight cars! It would be extremely reactive, like other group I metals. It would likely burst into flames upon contact with air. Unagiflum 01:28, 13 Mar 2005 (UTC)

Yes, it would. Lithium barely rusts or burns because it's so hard, or maybe its -O layer makes it so, and the hardest alkali metals are in the first rows. Hudrogen has a sudden jump in atomic size going to lithium compared with the later alkalis, so it should make a stiff aluminoid metal. lysdexia 04:49, 5 November 2005 (UTC)
Kinda correct, but there's an obvious flaw. Hydrogen oxide is a liquid at room temperature. GeeJo (t) (c) • 14:19, 11 February 2006 (UTC)
Boron has no oxide layer; it's the smallest, densest fuel-atom, and doesn't burn at normal conditions because of its great self-bonding barrier. So solid hudrogen would be its analòg. -lysdexia 13:00, 10 October 2007 (UTC) —Preceding unsigned comment added by 68.123.4.253 (talk)

Contents

[edit] Diamond is not stable.

Graphite is a more stable form of carbon than diamond. The decay period for diamonds is just very long. This should be clarified within the article, for completeness' sake.

Furthermore, the article's discussion on a car made from metastable metallic hydrogen is internally inconsistent. The article says that it can be used as a material for making cars and also burns very cleanly and energetically. These seem to be mutually inconsistent things. (Although aluminum has structural uses and is a good fuel--for rockets--there is a layer of aluminum oxide that prevents aluminum from spontaneously combusting in the air. Such a protective layer would not form for metallic hydrogen, because oxidizing it would probably yield water and energy.)

Neither do the paraffins have protective layers. lysdexia 04:49, 5 November 2005 (UTC)

[edit] Present in planetary cores?

I'm wondering...I've always seen this as "we think/some scientists believe" that metallic hydrogen shows up, and as the article doesn't cite any sources, I'm not sure if that's a valid statement. Should that be changed?

The atmospheric pressure of Jupiter is less than Earth's, and since it doesn't exist on Earth, I can't see why it would exist on Jupiter. Until we get a citation for this, it should be removed.

Pressures on Jupiter range from far below Earth atmosphere (at high altitude) to millions of atmospheres (near the core). The astrophysicists are referring to the core areas, where pressure and temperature are more than high enough to make the hydrogen metallic. --Nbishop 01:46, 14 February 2007 (UTC)

[edit] Superconductivity

One of the links given in the superconductivity section isn't even about metallic hydrogen, it is about magnesium diboride. I'm removing it. [1]. Also, I'm adding a link to the original paper by Ashcroft so that those with access to the journal can read it. --Nbishop 01:46, 14 February 2007 (UTC)

[edit] electron wavelength?

Hi! I'm just visiting from german wikipedia, where I just read the same thing: the spacing is more comparable with an electron wavelength (see De Broglie wavelength). What is that supposed to mean? The wavelength depends on momentum, so what is the wavelength. It's like talking about the wavelength of a photon, which is obviously nonsense. Is it maybe the Compton wavelength? CWitte 09:54, 27 July 2007 (UTC)

[edit] check these references

Nergaal (talk) 11:34, 11 December 2007 (UTC)

[edit] Copyright issues

The structure of this page looks a whole lot like http://www.chemie.de/lexikon/e/Metallic_hydrogen to me. Robbiemuffin (talk) 00:19, 3 March 2008 (UTC)