| environ. |
silicon A brittle metalloid element that exists in two allotropic forms; occurs principally in sand, quartz, granite, feldspar, and clay. It is usually a grey crystalline solid but is also found as a brown amorphous powder. It is used in transistors, rectifiers, solar cells, and alloys. Its compounds are widely used in glass manufacture, the building industry, and in the form of silicones (脆性非金属元素，以两个同素异形体的形式组成，主要存在于砂，石英，花岗岩，长石，粘土。通常是灰色的晶体，但也发现有棕色无定形粉末。它用在晶体管，整流器，太阳能电池，和合金中。它的化合物被广泛应用于玻璃制造、建筑业，以及在有机硅的形式。) |
