Complex silicates are minerals that contain silicate groups, which are made up of silicon and oxygen atoms. These minerals often include additional elements such as aluminum, iron, magnesium, and calcium, forming intricate structures. The silicate tetrahedron, a fundamental building block, consists of one silicon atom surrounded by four oxygen atoms, and these tetrahedra can link together in various ways to create different mineral forms. Examples of complex silicates include feldspar, mica, and amphibole. These minerals are significant in geology and are commonly found in igneous, metamorphic, and sedimentary rocks. Their diverse structures contribute to the wide range of physical properties and uses in industries such as construction and electronics.