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Images derived from the matrix L for CSB (cCSB = 0.5 wt %)-dyed mannitol spherulites (cPVP = 15 wt%, crystallize at 100 °C) at 630 nm: (a) |LB|, (b) |LD|, (c) LB angle (measured counterclockwise from + x), (d) LD angle, (e) CB and (f) CD images. The inner part is the δ-polymorph, and the outer part is the α-polymorph.
