Phyllosilicates are a group of minerals characterized by their layered structure, which consists of sheets of silicate tetrahedra. These minerals are commonly found in the Earth's crust and play a significant role in geology and soil formation. Examples of phyllosilicates include mica, clay minerals, and talc. The unique structure of phyllosilicates allows them to absorb water and other ions between their layers, making them important for various environmental processes. They are also used in various industries, including ceramics, cosmetics, and construction, due to their physical properties and versatility.