The T phase is produced at similar pressures, but higher temperatures of 1800–2200 °C. As to the α and β phases, they might both coexist at ambient conditions with the β phase being more stable.
T-fasen produceres ved lignende tryk, men højere temperaturer på 1800–2200 °C. Hvad angår α- og β-faserne så kan de begge sameksistere ved standardbetingelser, hvor β-fasen er den mest stabile.