NationMaster - Encyclopedia: Beta carbon nitride

Beta carbon nitride (β-C₃N₄) is a material predicted to be harder than diamond. Image File history File links 4_11nitride. ... Image File history File links 4_11nitride. ...

The material was first proposed in 1985 by Marvin Cohen and Amy Liu. Examining the nature of crystalline bonds they theorised that carbon and nitrogen atoms could form a particularly short and strong bond in a stable crystal lattice in a ratio of 1:1.3. That this material would be harder than diamond on the Mohs scale was first proposed in 1989. This article is about the year. ... Marvin L. Cohen (born Montreal in 1935) is a professor of condensed matter physics at the University of California, Berkley. ... Crystal (disambiguation) Insulin crystals A crystal is a solid in which the constituent atoms, molecules, or ions are packed in a regularly ordered, repeating pattern extending in all three spatial dimensions. ... â€œCovalentâ€ redirects here. ... For other uses, see Carbon (disambiguation). ... General Name, symbol, number nitrogen, N, 7 Chemical series nonmetals Group, period, block 15, 2, p Appearance colorless gas Standard atomic weight 14. ... In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. ... This article is about the gemstone. ... This article or section does not cite any references or sources. ... Year 1989 (MCMLXXXIX) was a common year starting on Sunday (link displays 1989 Gregorian calendar). ...

The material has been considered difficult to produce and could not be synthesized for many years. Recently, the production of beta carbon nitride was achieved. For example, nanosized beta carbon nitride crystals and nanorods of this material were prepared by means of an approach involving mechanochemical processing.

References

A. Liu and M. Cohen, "Prediction of New Low Compressibility Solids". Science 245, pp. 841-842

L.W. Yin, M.S. Li, Y.X. Liu, J.L. Sui, J.M. Wang, "Synthesis of beta carbon nitride nanosized crystal through mechanochemical reaction". J.Phys.: Condens. Matter 15, pp. 309-314

L.W. Yin, Y. Bando, M.S. Li, Y.X. Liu, Y.X. Qi, "Unique Single-Crystalline Beta Carbon Nitride Nanorods". Advanced Materials 15, pp. 1840-1844

Categories: Nitrides | Superhard materials | Materials stubs

Results from FactBites:

Carbon - Wikipedia (1554 words)
	Carbon is a chemical element in the periodic table that has the symbol C and atomic number 6.
	Carbon is a vital component of all known living systems, and without it life as we know it could not exist (see carbon chauvinism).
	The most prominent oxide of carbon is carbon dioxide, CO This is a minor component of the Earth's atmosphere, produced and used by living things, and a common volatile elsewhere.

Carbon - Facts, Information, and Encyclopedia Reference article (2155 words)
	Carbon is a vital component of all known living systems, and without it life as we know it could not exist (see alternative biochemistry).
	Carbon is used as a neutron moderator in nuclear reactors.
	Carbon is abundant in the sun, stars, comets, and in the atmospheres of most planets.

More results at FactBites »

COMMENTARY

Share your thoughts, questions and commentary here

Want to know more?
Search encyclopedia, statistics and forums:

Feeds | Contact
The Wikipedia article included on this page is licensed under the GFDL.
Images may be subject to relevant owners' copyright.
All other elements are (c) copyright NationMaster.com 2003-5. All Rights Reserved.
Usage implies agreement with terms.