from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any of many clay phyllosilicate minerals that have a relatively open structure

from the GNU version of the Collaborative International Dictionary of English

  • n. A hydrous silicate of alumina, of a greenish color, which, in certain states of humidity, appears transparent and almost gelatinous.

from The Century Dictionary and Cyclopedia

  • n. A massive, clay-like mineral, of a white to green or gray color: it is so called from its property of taking grease out of cloth, etc.


Sorry, no etymologies found.


  • Pure glass has been found only at Beloc, Haiti, and extremely rare in the core of smectite spherules in Mimbral, Lajilla Mexico.

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  • For example, smectite clays have been found in SNC meteorites.

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  • As discussed earlier, Martian soils are known to contain smectite clays.

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  • The NHM study showed that in the dominant ferruginous siliceous ore type, which makes up three quarters of the resources, most of the nickel is hosted in the iron mineral goethite (which holds up to 5 wt% Ni), and in smectite clays (with up to 4 wt% Ni).

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  • Mineralogy - Bentonite is not itself a mineral name, but more correctly, it is a smectite clay composed primarily of the mineral Montmorillonite.

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  • The swelling properties of smectite allows a certain degree of deformablity, allowing some 'healing' of the damaged zone

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  • Previous shallow drilling, 1.1 km to the north encountered kaolinite, smectite and localized chalcedony flooding typical of high level epithermal alteration that indicates the vein system may continue north but at a deeper level.

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  • A high level of preservation of the epithermal system is indicated by colloform vein textures and wallrock alteration characterized by low temperature carbonate minerals and illite-smectite clays.

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  • Fuller’s earth: Major producers of fuller’s earth are the United States (attapulgite, smectite), Spain (attapulgite, sepiolite), and Senegal (attapulgite).



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