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Each lot was dried in batches and passed through primary and secondary crushers to breakdown agglomerates. Batches were re-dried at 150 °C for 5 h. The material was screened to -200 mesh. The oversize fraction was milled, in 25-kg batches, in a vibration energy mill, and screened to -200 mesh. The final -200-mesh product weighed 390 kg. CZN-3 was blended in a single lot in a conical blender that had been flushed with nitrogen, and bottled in 200-g units. Each bottle was sealed, under nitrogen, in a mylar-aluminum foil pouch to provide long-term protection against oxidation.
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