Pencil 'Lead' Mightier than Diamonds? 95
GuardianBob420 writes "Space Daily is reporting that a team of researchers has used a combination of extreme pressure and irradiation to alter the molecular structure of graphite -- resulting in a previously unobserved super-hard form of the stuff.
From the article: 'The graphite that resulted from our experiment was so hard that when we released the pressure we saw that it had actually cracked the diamond anvil.'"
Pencil Lead (Score:1, Informative)
Re:Sure, it may be hard... (Score:2, Informative)
Maybe as the technology for growing diamonds becomes more precise and readily available, more usable quanities of this dense graphite material could be produced.
Answers to your questions (Score:5, Informative)
Yeah, that aggravated me too. Actually, even chemists consider buckys to be a third allotrope as carbon. As a chemist, I consider it bullshit for the same reason you mention. For what it's worth, Carbon-black is not pure carbon - it's a misture of large polynuclear hydrocarbons. It's graphite-like, but does contain hydrogen.
These are not difficult diagrams. Diamond and graphite are simple to draw, where's the new one?
I was annoyed by the same - fortunately, my school has a subscription to Science. Graphite, of course, is a planar, sp2 hybridized structure that forms layers of sheets. The sheets are staggered by half a ring, so that half of the carbons are centered over another carbon, and half are centered over the middle of a ring. Under high enough pressure, the carbons that are right over each other form a sigma bond. According to the article, this happens gradually over a range of like 10-20 GPa, with theoretically half the carbons ultimately forming interplane sigma bonds if one considered a two-plane system.
Unfortunately, even the Science article was stingy on the details (as they tend to be).
Re:Absolute Rubbish Reporting (Score:2, Informative)
W