I understand that monolayer carbon naturally forms in a regular hexagonal tiling. Is it, however, possible (if difficult) to form carbon monolayers of a different structure?

A 3-12-12 tiling, for example…

Semiregular Tiling 3-12-12 (Truncated Hexagonal) by R. A. Nonenmacher. This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International, 3.0 Unported, 2.5 Generic, 2.0 Generic and 1.0 Generic license.

(with carbon atoms at the vertices and bonds along the edges) would allow two single bonds and one double bond per atom, just like in normal graphene.

  • $\begingroup$ Welcome to Chemistry.SE! Could you use an image that shows the arrangement of atoms? It is not clear what your graphic represents. $\endgroup$ – A.K. Apr 1 '19 at 17:39
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    $\begingroup$ I remember answering a similar question an year or so ago: Is this structure stable? — the same pattern, but with nitrogen atoms. Probably might be interesting for you (also check out the comments to that question). $\endgroup$ – andselisk Apr 1 '19 at 18:08
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    $\begingroup$ @andselisk USPEX sounds interesting. I should try and look into that. $\endgroup$ – Tau Apr 1 '19 at 18:29
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    $\begingroup$ related en.wikipedia.org/wiki/Penta-graphene en.wikipedia.org/wiki/Phagraphene $\endgroup$ – Mithoron Apr 1 '19 at 19:35

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