Ms. Coral Hu
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Ms. Coral Hu
Leave a messageSilicon dioxide (chemical formula: SiO2) is an acidic oxide, the corresponding hydrate is silicate (H2SiO3). It has been known since ancient times. Silica is most common in nature in quartz, as well as in a variety of organisms. In many parts of the world, silica is the main component of sand. Silica is one of the most complex and abundant families of materials, being both a variety of minerals and produced synthetically. Applications range from structural materials to microelectronics to ingredients used in the food industry.
structure
SiO2 crystal has a variety of crystal forms, its basic structural unit is tetrahedral, each Si around the combination of 4 O, Si in the center, O in the four top angles; The smallest ring has six silicon atoms and six oxygen atoms. Many of these tetrahedrons are connected by the O of the vertex Angle, each O is shared by two tetrahedrons, that is, each O is combined with two Si. In fact, SiO2 crystal is composed of Si and O in a ratio of 1:2 three-dimensional network structure crystal. Therefore, SiO2 is usually used to represent the composition of silica. SiO4 tetrahedrons are found not only in SiO2 crystals but also in all silicate ores and are the basic skeleton that makes up the colorful silicate world.
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