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The glassware is usually transparent or translucent material that has no crystalline structure yet behaves like a solid. Common glass is generally composed of a silicate (such as silicon oxide, or quartz) combined with an alkali and sometimes other substances.

It is not very common due to its high glass transition temperature of over 2300 °C. Normally, other substances are added to simplify processing.

One is sodium carbonate, which lowers the glass transition to about 1500 °C. However, the soda makes the glass water soluble, which is usually undesirable, so lime, some magnesium oxide and aluminum oxide are added to provide for a better chemical durability.

The resulting glass contains about 70 to 74% silica by weight and is called a soda-lime glass. Soda-lime glasses account for about 90% of manufactured glass.
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