https://www.zhiyuematerial.com/products/silicon-dioxide-sputtering-target-sio2-14808-60-7/ Silicon Dioxide Sputtering Target (SIO2) Silicon dioxide, also known as silica, is an oxide of silicon with the chemical formula SiO2, most commonly found in nature as quartz and in various organisms. An acidic oxide, silicon dioxide is one of the most complex and abundant families of materials, both mineral and synthetic. SiO2 crystals come in a variety of crystal forms, and their basic structural unit is the tetrahedron.