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Hexagonal Diamond—A New Form of Carbon
Abstract
A new crystalline form of carbon—hexagonal diamond—has been synthesized in the laboratory under conditions of static pressure exceeding about 130 kbar and temperature greater than about 1000°C. It is necessary to start with well-crystallized graphite in which the c axes of the crystallites are parallel to each other and to the direction of compression. There is electrical evidence that the transformation starts at room temperature but hexagonal diamond is not retrieved unless a setting temperature exceeding about 1000°C is applied. The electrical and crystal characteristics have been studied. The crystal structure is hexagonal with a=2.52 Å and c=4.12 Å. The theoretical density is 3.51+g/cm3, same as cubic diamond. It has also been prepared recently in another laboratory from crystalline graphite by a method involving intense shock compression and strong thermal quenching. More recently it has been discovered to be present to the extent of over 30% in the Canyon Diablo meteorite diamonds.
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Cited by
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Li, W., Carrete, J., A. Katcho, N., & Mingo, N. (2014) · Computer Physics Communications · doi:10.1016/j.cpc.2014.02.015 · Cited by 3,147
A concise review of the Raman spectra of carbon allotropes
Thapliyal, V., Alabdulkarim, M. E., Whelan, D. R., Mainali, B., & Maxwell, J. L. (2022) · Diamond and Related Materials · doi:10.1016/j.diamond.2022.109180 · Cited by 298
Carbon Mineralogy and Crystal Chemistry
Hazen, R. M., Downs, R. T., Jones, A. P., & Kah, L. (2013) · Reviews in Mineralogy and Geochemistry · doi:10.2138/rmg.2013.75.2 · Cited by 114
Impact shock origin of diamonds in ureilite meteorites
Nestola, F., Goodrich, C. A., Morana, M., Barbaro, A., Jakubek, R. S., Christ, O., Brenker, F. E., Domeneghetti, M. C., Dalconi, M. C., Alvaro, M., et al. (2020) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.1919067117 · Cited by 58
Metadata
- Authors
- Bundy, F. P., & Kasper, J. S.
- Venue
- The Journal of Chemical Physics
- Publisher
- AIP Publishing
- Published
- 1967-05-01
- Volume
- 46
- Issue
- 9
- Pages
- 3437-3446
- ISSN
- 0021-9606 (ISSN-L)
- 1089-7690
- OpenAlex
- W2023789912
- Cited by
- 713
- References
- 0
- FWCI
- 5.27
- Type
- journal article
- Language
- en
- Open access
- closed
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- Bundy, F. P., & Kasper, J. S. (1967). Hexagonal Diamond—A New Form of Carbon. The Journal of Chemical Physics. https://doi.org/10.1063/1.1841236
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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