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Hectorite

earth science Maturity 7-9 Next article →

Hectorite is a rare type of clay. It is white and soft. It feels greasy to the touch. This clay is rich in lithium. People first described it in 1941. They named it after Hector, California. That place is near Barstow.

Hectorite belongs to the smectite group. This is a group of swelling clays. It can grow when it gets wet. This clay comes from volcanic ash. It forms from a mineral called clinoptilolite. It also forms from tuff. Tuff is a rock made of ash.

You can find hectorite in Morocco. It is in a clay called ghassoul. It is also in Nevada. It is at the Thacker Pass deposit. This site is in the McDermitt Caldera. This place has much lithium.

People use hectorite in many ways. It is used to make cosmetics. These are things like skin creams. It is also used in industry. It helps make refined lithium metal. The Hector mine has a large amount of it. This makes it useful to mine.

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