Synthesis of Form A by ball mill NG. Follow all steps in Section 2.1. Grind only for 45 min at 30 Hz which suffices to reach equilibrium. NOTE: Form A is quantitatively formed. The chemical composition of the product is consistent with 97%M of 1-2, 1.5%M of 1-1 and 1.5%M of 2-2. Synthesis of Form B by ball mill …
