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1. Silicate Rocks

   Linked via "silicon-oxygen tetrahedron"

   Silicate rocks constitute the predominant class of rock-forming minerals on Earth and are foundational to the structure of the planet's crust and upper mantle. Chemically, these materials are defined by the presence of the silicon-oxygen tetrahedron ($\text{SiO}_4^{4-}$), which serves as the basic structural unit. This ubiquitous framework dictates their physical properties, including hardness, density, and crystallization patterns. The classification of silicate rocks is complex, tra…