Depending upon the conditions, either nucleation or growth may be predominant over the other, and as a result, crystals with different sizes and shapes are obtained (Control of crystal size and shape constitutes one of the main challenges in industrial manufacturing, such as for pharmaceuticals).
For the region, see San Fernando Valley. San Fernando is a city located in the San Fernando Valley, in the northwestern region of Los Angeles County, California. It is completely surrounded by the City of Los Angeles.
The heat wave is not releasing its grip on us just yet, and the humidity is clinging too, and we're going to see highs today in the low 100s in the San Fernando, Santa Clarita, San Gabriel and Pomona valleys and the mountains of Los Angeles County, other than the Santa Monica range..