Figure 2
Temperature dependent (a) layer spacings and (b) coherence lengths (\(L_{\textit{coh}}\)) of the \(\alpha\) (red triangles), \(\beta\) (green squares) and \(\gamma\) (blue circles) forms in UDAPS 16 and UDAPS20 (open squares). Note that for reasons related to peak resolution, the third order layer reflections \({\textit{3q}}^{\alpha }\) and \({\textit{3q}}^{\beta }\) of \({\alpha }\) and \({\beta }\) form respectively and second order layer reflection \({\textit{2q}}^{\gamma }\) of the \({\gamma }\) form were used for the evaluation. (c) shows the temperature dependent intensity fractions \(\phi _{\alpha }\) and \(\phi _{\beta }\) calculated from the 3q reflection for \(\alpha\) (red triangles) and \(\beta\) (green squares) forms during cooling. (d,e) show the polarized optical micrographs for UDAPS16 and UDAPS20 respectively. The scale bar for (d,e) is 200 µm and 40 µm respectively.
