β-Carbon nitride

Β-Carbon nitride
	; Lattice structure of (β-C3N4).]]
Names
	IUPAC name β-Carbon nitride
Identifiers
3D model (JSmol)	Interactive image;
MeSH	Carbon+nitride
	InChI InChI=1S/N4C3/c1-5-2-6(1)3(5)7(1,2)4(5)6;
	SMILES N13[C]25N4[C]16N2[C]34N56;
Properties
Chemical formula	C3N4
Molar mass	92.061 g·mol−1
Structure
Crystal structure	Hexagonal, hP14
Space group	P63/m No. 176
Lattice constant	a = 6.36 Å, c = 4.648 Å
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

β-Carbon nitride (beta-carbon nitride), β-C₃N₄, is a superhard material predicted to be harder than diamond.

The material was first proposed in 1985 by Amy Liu and Marvin L. Cohen. 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, and that this material could be harder than diamond.

Nanosized crystals and nanorods of β-carbon nitride can be prepared by mechanochemical processing.

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