kiseloxygentetraedrat
Kiseloxygentetraedrat, or the silicon–oxygen tetrahedron, is the fundamental structural unit of silicate minerals. It consists of a central silicon atom in the +4 oxidation state surrounded by four oxygen atoms at the corners of a tetrahedron. In an ideal unit, each Si–O bond length is about 1.60 Å, and the internal O–Si–O angles are close to the tetrahedral value. In crystalline silicates, these tetrahedra commonly link by sharing oxygen atoms with neighboring tetrahedra, forming a wide range of three‑dimensional networks.
Connectivity and classification are based on how tetrahedra link through shared oxygens. When they share no
Silicate minerals with silicon–oxygen tetrahedra are the most abundant on Earth and form the basis of rocks