Abstract
Elastic moduli of mixed alkali borate glasses based on lithium and sodium oxides are calculated by measuring ultrasonic velocities and densities. For the purpose of measuring the velocity with high accuracy, the McSkimin criterion for determining the correct cyclic overlap between echoes is used. The structure of the system is discussed as a function of composition by considering the behaviour of elastic properties. Infrared studies have also been done which confirm the conclusions reached by the ultrasonic studies of the given system.
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