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smectite

Line breaks: smect|ite
Pronunciation: /ˈsmɛktʌɪt
 
/

Definition of smectite in English:

noun

[mass noun]
A clay mineral (e.g. bentonite) which undergoes reversible expansion on absorbing water.
Example sentences
  • The clay mineral smectite, with physical properties that make it unsuitable as a soil if it is wet, is only found in major amounts in covered stadiums.
  • Common clays are usually mixtures of clay minerals such as illite, smectite, and kaolinite, together with fine silica and other minor constituents.
  • The clay is composed of illite and kaolinite, with minor amounts of chlorite and smectite.

Origin

early 19th century: from Greek smēktis 'fuller's earth' + -ite1.

Definition of smectite in:

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