Reliable (reported energy within 300 eV of a reference energy)
Comment:
The glass was prepared from mixture of Zn(PO3)2 glass powder and reagent grade H3BO3 melted in air (T = 1273 - 1373 K, time = 1 h). The glass was quenched on stell plate and annealed for 30 min near the glass transition temperature.