Answers are grounded in this paper and cite their sources.
Microwave irradiation of solutions of Zn(NO3)2 and urea provides a straightforward route to a-axis oriented crystals of needle-like morphology.
No takes yet. Share an insight, caveat, or question.
Ledwith et al. (2004) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: