Figure 4
The temperature evolution of the eigenvalues of the unit strain tensor of the thermal expansion (10 −6 K−1) of (I) during cooling from 290 to 110 K (dark-grey lines; blue in the electronic version of the paper) and warming from 110 to 250 K (light-grey lines; red). Top line: α1; middle line: α2; bottom line: α3. |