From Mother Nature to our must-have devices, we’re surrounded by crystals. Those courtesy of the former, such as ice and snow, can form spontaneously and symmetrically. But the silicon-based or gallium nitride crystals found in LEDs and other electronics require a bit of coaxing to attain their ideal shapes and alignments.
from Engineering and Construction News – ScienceDaily https://www.sciencedaily.com/releases/2018/01/180131085828.htm
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