硅氧四面体是硅酸盐晶体结构中的基本构造单元。它是由位于中心的一个硅原子与围绕它的四个氧原子所构成的配阴离子[SiO4]4-，因周围的四个氧原子分布成配位四面体的形式，故名。
分析表明硼氧四面体取代硅氧四面体，并被引入皂是石的二八面体结构中。
The analysis indicated that BO_4 tetrahedra substituted SiO_4 tetrahedra and was introduced into the dioctahedral structure of saponite.
低钙粉煤灰中的微粒为硅氧四面体结构，自身的活性很低。
The particle in the fly ash of low calcium is the silicon oxygen tetrahedron structure, one's own activation is very low.
红外光谱及X-射线光电子能谱研究表明硼氧四面体取代硅氧四面体而进入二八面体结构；
The analysis of infrared spectrum and X-ray photoelectron spectroscopy indicated that BO_4 tetrahedra substituted SiO_4 tetrahedra and was introduced into the dioctahedral structure of saponite.
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