SYSTEM LI3BN2 AT HIGH PRESSURES AND TEMPERATURES

The system Li3BN2 was studied over the pressure and temperature range from 10 to 65 kb and 300-1900°C, respectively. The stability region of a quenchable high pressure modification, Li3BN2(W), was defined, and the data also suggest the possibility of another nonquenchable high pressure modification. Li3BN2(W) is the phase which appears to be in equilibrium with borazon (cubic BN) during growth of this phase from the system Li3N-BN, and the P-T data obtained on the melting of Li3BN2(W) are useful for defining the growth conditions for borazon. © 1969.