Phyllosilicates are a group of minerals characterized by their layered structure, which consists of sheets of silicate tetrahedra. These sheets are held together by weak van der Waals forces, allowing them to easily separate. Common examples of phyllosilicates include mica, clay minerals, and talc. Phyllosilicates are important in various geological and industrial processes. They play a crucial role in soil formation and fertility, as well as in the production of ceramics and other materials. Their unique properties make them valuable in applications such as cosmetics and lubricants.