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.
Zip codes, census tracts, community and city names, and other means have been used to identify Valley -specific records. The San Fernando Valley had a population 1,696,347 in 2000. A recent estimate by the Los Angeles County Urban Research Unit and Population Division puts the 2004 population at 1,808,599. The largest cities entirely in the Valley are Glendale and Burbank.