The structure of SiO2 — Current views

摘要: Abstract Silicon dioxide or silica, one of the most important raw materials in ceramics, undergoes rather complex phase transformations under varying conditions temperature, pressure and chemical purity. The flexibility silica framework, consisting [SiO4] tetrahedra bonded together into a giant polymeric “open molecule” by sharing oxygen atoms, is primarily due to easy adjustment SiOSi angles between response changing conditions. structure reinvestigations polymorphs done recent years allow comprehensive review problems, including high-pressure amorphous states SiO2 mechanism some transformations. difficult still controversial problem vitreous extensively discussed view technical importance glass.