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Question

Name the allotropic forms of carbon.

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Solution

Allotropes of carbon:
  • Diamond – an extremely hard, transparent crystal, with the carbon atoms arranged in a tetrahedral lattice. A poor electrical conductor. An excellent thermal conductor.
  • Lonsdaleite – also called hexagonal diamond.
  • Graphene – is the basic structural element of other allotropes, nanotubes, charcoal, and fullerenes.
  • Q-carbon – a ferromagnetic, tough, and brilliant crystal structure that is harder and brighter than diamonds.
  • Graphite – a soft, black, flaky solid, a moderate electrical conductor. The C atoms are bonded in flat hexagonal lattices (graphene), which are then layered in sheets.
  • Linear acetylenic carbon (Carbyne)
  • Amorphous carbon
  • Fullerenes, including Buckminsterfullerene, a.k.a. “buckyballs”, such as C60.
  • Carbon nanotubes – allotropes of carbon with a cylindrical nanostructure.

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