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 City of San Fernando does not oppose the concept of a high-speed rail network for the state of California; however, it does oppose any proposed route through San Fernando. The San Fernando City Council continues to urge the California High-Speed Rail Authority (CHSRA) to consider alternative routes.