硅藻土(Bacillary Cease—Kieselguhr—Diatom)是单细胞水生植物硅藻的残骸沉积物。硅藻在植物学分类中属于杂色藻门硅藻纲。它的个体很微小,只有在显微镜下才能看到,一般为20～40μm,最小的不足1μm。硅藻死后的遗骸沉积于海底或湖底,经长年的地质变迁,即形成硅藻土沉积矿藏。硅藻有一万多种,而各藻类都有二氧化硅架体,形成每类特有的形状。其二氧化硅分子排列是不规则的, Bacillary Cease-Kieselguhr-Diatom is a debris deposit of the single-cell aquatic plant diatoms. Diatoms belong to the genus Megalophyta in the botanical classification. It’s very small, only to see under the microscope, usually 20 ~ 40μm, the smallest less than 1μm. Diatoms after the remains of the sediments deposited on the bottom of the sea or lake, after years of geological changes, the formation of diatomite deposits. There are more than ten thousand kinds of diatoms, and each kind of algae has a silica framework, forming each kind of unique shape. The silica molecular arrangement is irregular,