At other places natural silica colors the water white-blue.
在另外一些地方，天然的二氧化硅把水染成了水白蓝。
Thus, the mineral crystalline morphology of natural silica sand is an important parameter for use in foundry.
考查了铸造用天然硅砂的矿物晶体形态，可将其大致分为单晶体和多晶集合体两类。
A highly reactive penta-coordinate organic silicon complex was prepared by the reaction of natural silica with ethylene glycol in the presence of potassium hydroxide.
以无定型二氧化硅为起始原料，与乙二醇、氢氧化钾反应，生成高反应活性的五配位硅钾化合物；
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