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二氧化硅(石英)发现在地球上所有类型的土壤?

知道这是在沙子、淤泥和粘土但这是发现在所有的土壤吗?

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* * * * tl;博士硅无处不在,在一切。数量可以在石英砂接近100%,或少于1%泥炭或石灰岩(以及派生的土壤)。发现完全纯净的土壤(假设不到0.1%)是一厢情愿的想法。- - - - - - - - - - -二氧化硅(或硅、二氧化硅,都是一样的)可以存在于两个“形式”:1。化合物,通常称为石英,还有各种各样的其他材料如燧石、玛瑙、碧玉,蛋白石等。2。其他材料的化学成分(认为氧气在水中)。大多数的硬脆性固体材料你知道二氧化硅的化学成分。这包括大多数岩石、粘土矿物、混凝土、砖、陶瓷、等硅化合物(如石英等)是一种最丰富的表面材料。沙子在石英(影片的)通常是99%。淤泥和粘土实际上是晶粒尺寸的定义,没有化学成分。 Most soils that are silt or clay size also have abundant quartz in it. Quartz is a component of dust. This stuff gets everywhere. For soils that don't have quartz proper in them, most will have silica as a chemical component. Clay minerals, pyroxenes, amphiboles, micas, feldspars, and all silicate minerals (which are the most common rock forming minerals on Earth). It is easier to talk about the rocks and soils that *don't* have any silica in them. 1. Peat and other organic soils (coal?). These form by decay of plant material, and should not have any silica in them. However, since silica is a component of dust, and dust accumulates when these soils form, there will be some amount of silica. The amount can vary from a few percent to as little as a tenth of a percent, but it will be there. 2. Evaporites. Things like salt, gypsum, etc. These are chemically precipitated rocks which should not have silica. Then again, dust. There will be some amount. 3. Carbonates. Limestone is calcium carbonate. Limestones are rarely pure though, and the most common contaminant is - you guessed it - silica. Because of dust. Or just silicate sediments floating in the sea when the limestones form.

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