Multiple choice

Which among the following is a theoretically-predicted metastable allotrope of carbon?

  1. Chaoite

  2. Prismane C8

  3. Body-centered tetragonal carbon

  4. Metallic carbon
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Prismane C8 is a theoretically-predicted metastable carbon allotrope comprising an atomic cluster of eight carbon atoms, with the shape of an elongated triangular bipyramid—a six-atom triangular prism with two more atoms above and below its bases.

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