zeolites - определение. Что такое zeolites
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Что (кто) такое zeolites - определение

TECTOSILICATE MINERAL
Zeolites; Quick Clot; Xeolite; Zeolitic; Goosecreekite; Dachiardite; Offretite; Mazzite; Epistilbite; Wenkite; Zeolit; Zeolite Crystal Synthesis Mechanism; User:Szcshr123/sandbox; Ceolit; Ceolite; Zeolith
  • Synthetic zeolite
  • Comparison of framework structures of LTA-type zeolite (left) and FAU-type zeolite (right)
  • [[Natrolite]] from Poland
  • A combination specimen of four zeolite species. The radiating natrolite crystals are protected in a pocket with associated stilbite. The matrix around and above the pocket is lined with small, pink-colored laumontite crystals. Heulandite is also present as a crystal cluster on the backside
  • A form of [[thomsonite]] (one of the rarest zeolites) from India
  • Polished thomsonite
  • A researcher at [[Sandia National Laboratories]] examines vials of SOMS (Sandia Octahedral Molecular Sieve), a zeolite that shows potential for radioactive waste and industrial metals cleanup.
  • Three ways to represent the oxygen 4-membered ring structure of silicate compounds.
  • Zeolite Mordenite with some Si atoms substituted with Al atoms.
  • 4}} tetrahedra. Sodium is present as an extra-framework cation (in green). Si atoms can be partially replaced by Al or other tetravalent metals.

Zeolitic         
·adj Of or pertaining to a zeolite; consisting of, or resembling, a zeolite.
Zeolite         
·noun A term now used to designate any one of a family of minerals, hydrous silicates of alumina, with lime, soda, potash, or rarely baryta. Here are included natrolite, stilbite, analcime, chabazite, thomsonite, heulandite, and others. These species occur of secondary origin in the cavities of amygdaloid, basalt, and lava, also, less frequently, in granite and gneiss. So called because many of these species intumesce before the blowpipe.
Zeolite         
Zeolites are microporous, crystalline aluminosilicate materials commonly used as commercial adsorbents and catalysts. They mainly consist of silicon, aluminum, oxygen, and have the general formula ・y where is either a metal ion or H+.

Википедия

Zeolite

Zeolites are microporous, crystalline aluminosilicate materials commonly used as commercial adsorbents and catalysts. They mainly consist of silicon, aluminium, oxygen, and have the general formula Mn+
1/n
(AlO
2
)
(SiO
2
)
x
・yH
2
O
where Mn+
1/n
is either a metal ion or H+. These positive ions can be exchanged for others in a contacting electrolyte solution. H+
exchanged zeolites are particularly useful as solid acid catalysts.

The term zeolite was originally coined in 1756 by Swedish mineralogist Axel Fredrik Cronstedt, who observed that rapidly heating a material, believed to have been stilbite, produced large amounts of steam from water that had been adsorbed by the material. Based on this, he called the material zeolite, from the Greek ζέω (zéō), meaning "to boil" and λίθος (líthos), meaning "stone".

Zeolites occur naturally but are also produced industrially on a large scale. As of December 2018, 253 unique zeolite frameworks have been identified, and over 40 naturally occurring zeolite frameworks are known. Every new zeolite structure that is obtained is examined by the International Zeolite Association Structure Commission (IZA-SC) and receives a three letter designation.