Figure 3.

Temperature trend of the parameter $\beta =\left(\partial {\nu }_{\text{s}}/\partial T\right)/{\nu }_{\text{s}}$ obtained from the data in Fig. 2. β has a temperature dependence similar to that of the thermal expansion coefficient, $\alpha =\left(\partial V/\partial T\right)/V$ (37). To see this figure in color, go online.