Glossary

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Z

zeolites

Porous aluminosilicate minerals, often formed some time after sedimentary layers have been deposited, or where volcanic rocks and ash react with alkaline groundwater. Zeolites are often used as catalysts and water softeners, and their microporous surface sturcture makes them useful in concentrating and condensing molecular substances.

zinc

A metallic chemical element (Zn). Zinc is typically used in metal alloys and galvanized steel.