Two C28 Clathrates

  • Marzio de Corato
  • Davide M. Proserpio
  • Marco Bernasconi
  • Giorgio Benedek
Part of the Carbon Materials: Chemistry and Physics book series (CMCP, volume 6)


Although carbon fullerenic clathrates, characterized by eclipsed bonds, have not been synthesized yet, their structure may be reflected in the assembly of tetrahedral diamondoid clusters (hollow diamonds) due to their assembling into the eclipsed configuration. The detection by El Goresy et al. (Lunar Planetary Sci 34:art. No. 1016, 2003a; C R Geosci 335:889–898, 2003b; Meteorit Planet Sci 39:A36, 2004) in highly shocked meteoritic rocks of a cubic diamond-like polymorph with almost 400 atoms per unit cell stimulated the present investigation on hypothetical small carbon clathrates with 4-membered rings on which hollow diamonds can be constructed via a cluster assembly. Two polytypes of a novel C28 clathrate, one body-centered orthorhombic (bco) and the other simple cubic (sc), are proposed, with a detailed ab initio characterization of the electronic and zero-wave-vector vibrational structures of the bco phase. The assembly of C14 diamondoid clusters into the sc-C28 array is briefly discussed in comparison with the above polymorph in order to illustrate a viable method of topological analysis of complex crystalline structures.


Bulk Modulus Cohesive Energy Phonon Spectrum Electronic Band Structure Dangling Bond 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



We thank Prof. Mircea Diudea for many illuminating discussions on the beauty of exotic carbon structures and the power of topological analysis. One of us (GB) acknowledges the support of the Alexander-von-Humboldt Stiftung, and thanks Drs. Igor Baburin, Yanming Ma, and Artem Oganov for useful discussions.


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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Marzio de Corato
    • 1
    • 2
    • 3
  • Davide M. Proserpio
    • 4
  • Marco Bernasconi
    • 1
  • Giorgio Benedek
    • 1
    • 5
  1. 1.Dipartimento di Scienza dei MaterialiUniversitá di Milano-BicoccaMilanItaly
  2. 2.Centro S3, CNR-Istituto NanoscienzeModenaItaly
  3. 3.Dipartimento di FisicaUniversitá di Modena e Reggio EmiliaModenaItaly
  4. 4.Dipartimento di ChimicaUniversitá degli Studi di MilanoMilanItaly
  5. 5.Donostia International Physics Center (DIPC)University of the Basque Country (UPV-EHU)Donostia – San SebastiánSpain

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