Poissons Ratio and Root-Mean-Square Displacements
of Atoms in Inorganic Glasses

D. S. Sanditov*, M. A. Khindanov**, and S. Sh. Sangadiev*

* Buryat State University, ul. Smolina 24a, Ulan-Ude, Buryat Republic, 670000 Russia
** Kyrgyzsko-uzbekskii University, ul. Isanova 79, Osh, 714017 Kyrgyzstan

Received September 23, 1997

Abstract—The Poisson ration —the ratio of transverse and longitudinal deformations under uniaxial ten-
sion—is a function of the limiting root-mean-square displacements of atoms from equilibrium posi-
tions. The volume of fluctuation hole _h serves as a measure of root-mean-square atomic displacements
for vitreous systems. An empirical linear dependence of the quantity (1 – 2) on the fluctuation hole volume _h
is established.

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