Haeckelites
Family of hypothetical carbon allotropes
![](http://upload.wikimedia.org/wikipedia/commons/thumb/9/9e/Haeckelite_8%E2%80%934.png/220px-Haeckelite_8%E2%80%934.png)
Haeckelites are members of a proposed family of hypothetical carbon allotropes. The carbon atoms would be arranged in a trivalently coordinated structure generated by a periodic arrangement of pentagonal, hexagonal and heptagonal carbon rings. They have not yet been synthesised in the laboratory, but have been the subject of a considerable amount of theoretical work and numerical simulation. They were first proposed by Humberto and Mauricio Terrones and their colleagues in 2000.[2]
Name
![ink illustration of protists](http://upload.wikimedia.org/wikipedia/commons/thumb/b/b7/Radiolaria_%28Challenger%29_Plate_111.jpg/220px-Radiolaria_%28Challenger%29_Plate_111.jpg)
They were named in honour of Ernst Haeckel, whose diagrams of Radiolaria and Phaeodarea contained similar structural features.
References
![](http://upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png)
Wikimedia Commons has media related to Haeckelites.
- ^ Camacho-Mojica, Dulce C.; López-Urías, Florentino (2015). "GaN Haeckelite Single-Layered Nanostructures: Monolayer and Nanotubes". Scientific Reports. 5: 17902. Bibcode:2015NatSR...517902C. doi:10.1038/srep17902. PMC 4674713. PMID 26658148.
- ^ Terrones, H; Terrones, M; Hernandez, E; Grobert, N; Charlier, J. C.; Ajayan, P. M.; et al. (2000). "New Metallic Allotropes of Planar and Tubular Carbon" (PDF). Physical Review Letters. 84 (8): 1716–1719. Bibcode:2000PhRvL..84.1716T. doi:10.1103/physrevlett.84.1716. PMID 11017608.
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Allotropes of carbon
- Diamond (cubic)
- Lonsdaleite (hexagonal diamond)
- Graphite
- Graphene
- Fullerenes, including C60 (buckminsterfullerene), C70, Fullerene whiskers, Nanotubes, Nanobuds, Nanoscrolls)
- Glassy carbon
- Linear acetylenic carbon
- C
6 (cyclo[6]carbon) - C
18 (cyclo[18]carbon)
- C
1 (atomic carbon) - C
2 (diatomic carbon) - C
3 (tricarbon)
- C
3 (cyclopropatriene) - C
6 (prismane C8) - Chaoite
- Haeckelites
- Cubic carbon
- Metallic carbon
- Penta-graphene