Silicon is rarely found in nature in its uncombined form. In silicon is with 25.7% of the earth crust being silicon. Silicon, binds strongly with oxygen and is nearly always found as silicon dioxide (quartz) , so it the most second available material on earth and due to that the quartz crystal is (piezoelectric) so used in industry
Ground silica, also known as ground quartz and silica flour, is produced by grinding high-purity quartz, quartzite, sandstone, or silica sand to finer than 200 mesh. Air separation is used as required to remove kaolin, mica, feldspar, or calcite impurities. Silica sand recovered as a byproduct during the flotation of other minerals is also used as a source. Ground silica for filler uses typically assays >99% sio2 and offers high brightness, low moisture, chemical inertness, relatively low surface area, and the low liquid absorption
It is a clay clay, white, with a high melting point and is one of the most resistant types of clay. Chemical composition Aluminum 2 Si2 Oxygen 5 (Hydroxide) 4.Canned z
general
Dolomite is a carbonate mineral composed of calcium magnesium carbonate CaMg(CO3)2. The term is also used to describe the sedimentary carbonate rock lodestone.
Dolostone (dolomite rock) is composed predominantly of the mineral dolomite with a stoichiometric ratio of 50% or greater content of magnesium replacing calcium, often as a result of diagenesis.
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