Growth of icosahedral boron-rich clusters at high pressure

Paul F. McMillan, Herve Hubert, Andrew Chizmeshya

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The stoichiometry of boron suboxide (B 6O 1-X) synthesized at high pressure lies closer to the nominal composition (x = 0) than materials obtained at atmospheric pressure. The crystallinity of materials obtained in the presence of molten B 2O 3 is also higher than for sintered powders. Further, for syntheses at 1700-1800 °C between 4 and approximately 5-6 GPa, the well-crystallized particles are dominated by large (up to approximately 40 μm in diameter) icosahedral multiply-twinned particles. This unusual morphology is obtained by Mackay packing; i.e., by assembly of successive shells of icosahedral B 12 units around a central icosahedral nucleus. The result is a multiply-twinned particle in which each of the 20 elements has the R3̄m space group of the α-B structure.

Original languageEnglish (US)
Title of host publicationMaterials Research Society Symposium - Proceedings
EditorsN.M. Rodrigues, S.L. Soled, J. Hrbek
PublisherMRS
Pages453-459
Number of pages7
Volume499
StatePublished - 1998
EventProceedings of the 1997 MRS Fall Symposium - Boston, MA, USA
Duration: Dec 2 1997Dec 4 1997

Other

OtherProceedings of the 1997 MRS Fall Symposium
CityBoston, MA, USA
Period12/2/9712/4/97

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Boron
Stoichiometry
Powders
Atmospheric pressure
Molten materials
Chemical analysis

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

McMillan, P. F., Hubert, H., & Chizmeshya, A. (1998). Growth of icosahedral boron-rich clusters at high pressure. In N. M. Rodrigues, S. L. Soled, & J. Hrbek (Eds.), Materials Research Society Symposium - Proceedings (Vol. 499, pp. 453-459). MRS.

Growth of icosahedral boron-rich clusters at high pressure. / McMillan, Paul F.; Hubert, Herve; Chizmeshya, Andrew.

Materials Research Society Symposium - Proceedings. ed. / N.M. Rodrigues; S.L. Soled; J. Hrbek. Vol. 499 MRS, 1998. p. 453-459.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

McMillan, PF, Hubert, H & Chizmeshya, A 1998, Growth of icosahedral boron-rich clusters at high pressure. in NM Rodrigues, SL Soled & J Hrbek (eds), Materials Research Society Symposium - Proceedings. vol. 499, MRS, pp. 453-459, Proceedings of the 1997 MRS Fall Symposium, Boston, MA, USA, 12/2/97.
McMillan PF, Hubert H, Chizmeshya A. Growth of icosahedral boron-rich clusters at high pressure. In Rodrigues NM, Soled SL, Hrbek J, editors, Materials Research Society Symposium - Proceedings. Vol. 499. MRS. 1998. p. 453-459
McMillan, Paul F. ; Hubert, Herve ; Chizmeshya, Andrew. / Growth of icosahedral boron-rich clusters at high pressure. Materials Research Society Symposium - Proceedings. editor / N.M. Rodrigues ; S.L. Soled ; J. Hrbek. Vol. 499 MRS, 1998. pp. 453-459
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