Reliable (reported energy within 300 eV of a reference energy)
Comment:
The glass was prepared from mixture of reagent grade ZnO and NH4H2PO4 melted in air (T = 1273 K, time = 1 h). The glass was quenched on stell plate and annealed for 30 min near the glass transition temperature. The P2O5 content was determined by inductively coupled coupled plasma atomic emission spectroscopy.