"Above 800 °C, P3N5 decomposes, evolving nitrogen: P3N5 --> 3 PN + N2
Phosphorous(III) nitride, PΞN, ... is metastable with respect to decomposition into P2 and N2, PN --> 1/2 P2 + 1/2 N2; Δ= -98 kJ ), but
at low temperatures it polymerises into a coloroless phosphorous(III) nitride. In addition to the above compounds, there are intractable
yellow to brown nitrides with high melting points and stoiciometries that lie somewhere between PN and P3N5.
"Inorganic Chemistry", Egon Wiberg, A. F. Holleman, Nils Wiberg, p737
|