| dc.description |
The study by the mass-spectrometric Knudsen-cell method of the vapours in equilibrium with metal oxide + metal phosphide systems at 1000â 1700 K made possible the identification of the molecules P2O3, P2O4, P2O5 and P3O6. Their atomization energies were determined, as well as those of the phosphorus oxides prevalent at low temperatures. These are : P2O3 : 2055±15, P2O4 : 2530±18, P2O5 : 3020±22, P3O6 : 4012±24, P4O6 : 4385 (+40, â 60), P4O7 : 4956±23, P4O8 : 5516±25, P4O9 : 6066±27 kJ mol<sup>â 1</sup>. |
