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The Dembovsky’s theory of glass formation

E. A. CHECHETKINA1

Affiliation

  1. Institute of General and Inorganic Chemistry of Russian Academy of Sciences, Leninsky Pr. 31, Moscow 119991, Russia

Abstract

In this memory paper the scientific way of Prof. Dembovsky (1932-2010) is presented. It can be divided into four successive steps: (1) investigation of materials belonging to chalcogenide glass-forming compositions; (2) construction of empirical theory of glass formation; (3) introduction of “quasimolecular defects” (QMD) as microscopic basis of the glassy state, and (4) transformation of QMD into hypervalent bonding configurations (HVC), which are not “defects” but a necessary component of glass structure and a general cause of glass formation and glass specificity; the existence of HVC in glasses being justified by direct quantum-chemical calculations. As a result, Dembovsky have created a principally new basis for understanding of glass nature, an approach that merits an appropriate recognition and further development..

Keywords

Glass formation, Chalcogenide glassy semiconductors, Lone-pair electrons, Hypervalent bonding configurations, Quantum-chemical modeling.

Submitted at: June 2, 2011
Accepted at: Nov. 23, 2011

Citation

E. A. CHECHETKINA, The Dembovsky’s theory of glass formation, Journal of Optoelectronics and Advanced Materials Vol. 13, Iss. 11-12, pp. 1385-1392 (2011)