The deteujjjjjjjjjjjjjjThe specific-heat data given in table 1 are plotted in figure 1. The
broken line at the lowest t emperatures is calculated from the Debye
equation [10, 14] for specific heats, with a value of 80 for the parameter
pp.. This value was selected because it was found to give the best
agreement with the three lowest experimental points.
The data from table 1 were also used to prepare a large graph in
which OpjT values were plotted as a function of the temperature. Since in the temperature range 18° to 3400 K the values of OpjT lie
between 0.0052 and 0.0073 Int. joule . gram-I. degree- 2, it was not
difficult to plot the values on a scale sufficiently large to do justice to
the accuracy of the data.. From the best smooth curve drawn through
the plotted values of OpjT, values of Op were obtained at integral
temperatures and are presented in table