Talk:Lonsdaleite
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How can it be diamond if it does not have the same lattice structure as diamond ? ----FvdP 19:34 12 Jun 2003 (UTC)
A hardness of 3? On what scale? --Carnildo 18:09, 26 Aug 2004 (UTC)
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[edit] Name
Is this named after anyone?
[edit] Arrgh?!
"This ring structure is the most stable conformation of cyclohexane, and this contributes to the stability of diamond, which is the most stable allotrope of carbon. This stability is responsible for diamond's extreme hardness."
This is utter nonsense, yes the chair is the most stable conformation of cyclohexane, but diamond IS NOT the most stable allotrope of carbon, this is only the case at high pressure. At standard temperature and pressure, the mast stable allotrope is graphite (due to the greater phonon free energy, if you're interested). Also, hardness is not determined by energetic stability, it is determined by the stiffness (Rockwell hardness) or resistance to plastic flow (vickers hardness or Mohs scale). Will edit these bits.
[edit] Arrgh?! version 2
After more reading, the whole lattice structure section consists of masses of awful science, and basically needs to be deleted and rewritten. —The preceding unsigned comment was added by 131.111.195.8 (talk) 16:30, August 20, 2007 (UTC)
[edit] What Hardness is it
I found value for hardness of 3 Mohs as well as 7-8 in different referencess. Lonsdaleite structure is similar to graphite hP4 in Pearson symbolizm. So I more belive it is 3.
