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.
A region in Los Angeles county that is north of the Santa Monica mountains. Also bordered by the Santa Susana Mountains and the San Gabriel Mountains. Most of the San Fernando Valley is part of the city of Los Angeles but other cities that reside there include Calabassas, San Fernando, Burbank, and Glendale.