Figure 11
Experimental X-ray powder patterns of: (a) a mixture of polymorphs (I) and (II); (b) the residue when this mixture was stored in a deep freeze at 253 K for 3 d in acetone; (d) the same mixture after storage for 3 d at room temperature in acetone. Calculated powder patterns are shown for polymorph (II) (c) and polymorph (I) (e). |