二氧化硅的最简式是SiO2，但它并不代表一个简单分子（仅表示二氧化硅晶体中硅和氧的原子个数之比）。 纯净的天然二氧化硅晶体，是一种坚硬、脆性、不溶的无色透明的固体，常用于制造光学仪器等。

Silicon dioxide, also known as silica, is an oxide of silicon with the chemical formula SiO2, commonly found in nature as quartz. [5][6] In many parts of the world, silica is the major constituent of sand.

Silica is another name for the chemical compound composed of silicon and oxygen with the chemical formula SiO2, or silicon dioxide. There are many forms of silica.

Apr 11, 2021 · 实际上，SiO2晶体是由Si和O按1：2的比例所组成的立体网状结构的晶体。 因此，通常用SiO2来表示二氧化硅的组成。 SiO4四面体不仅存在于SiO2晶体中，而且存在于所有硅酸盐矿石中， …

Oct 15, 2024 · 常见的浓磷酸（或者说焦磷酸）在高温下即可腐蚀二氧化硅，生成杂多酸 [1]，高温下熔融硼酸盐或者硼酐亦可腐蚀二氧化硅，鉴于此性质，硼酸盐可以用于陶瓷烧制中的助熔剂，除此之外氟 …

Jan 28, 2025 · Silicon Dioxide ( SiO₂) – Definition, Structure, Preparation, Uses, Side Effects Silicon Dioxide is denoted as SiO₂, is a common covalent compound that plays a significant role in the world …

Feb 22, 2024 · I.概况化学式：SiO2。 CAS登记号：14808 60 7。 摩尔质量 (g/mol)：60.084。 II.物理性质颜色：白色。 性状：晶体。 熔点 (℃)：1710 (在867℃时开始转变为不同的硅石形式)。 沸点 …

^ Lager G. A.; Jorgensen J. D.; Rotella F.J. Crystal structure and thermal expansion of a-quartz SiO2 at low temperature. Journal of Applied Physics. 1982, 53 (10): 6751–6756.

Silicon dioxide (SiO2), or silica, is defined as a common natural material and the second most prevalent biomineral, primarily found in soil, sand, and rock, as well as in various living organisms, including …

Silicon dioxide, or silica, (SiO 2) is another important example of a macromolecular solid. Silica can exist in six different crystalline forms. The best known of these is quartz, whose crystal structure shown …