Figure 1

(A) Pressure-composition phase diagram of the C-N system.
(B) Enthalpy curves (relative to α-C3N4) of the five earlier proposed structures18 and the newly predicted structures.
(A) Pressure-composition phase diagram of the C-N system.
(B) Enthalpy curves (relative to α-C3N4) of the five earlier proposed structures18 and the newly predicted structures.