ESR OF TRAPPED HOLES AND ELECTRONS IN NATURAL AND SYNTHETIC CARBONATES, SILICATES AND ALUMINOSILICATES

ESR investigations at 77 and 300 K were performed on samples obtained from various deposits and by different regimes of the synthesis. The s amples were exposed to gamma-irradiation yielding trapped holes, elect rons and H . atoms. The trapping process was discussed in terms of the conditions of the synthesis of the solids, the nature and concentrati on of the dopands and the crystallinity of the samples. Comparing the ESR findings of the synthetic and natural specimens some primary elect ronic defects and different H . atom traps could be detected. Copyrigh t (C) 1996 Elsevier Science Ltd