Zeolite A, also known as LTA (Linde Type A), belongs to the family of aluminosilicate molecular sieves. It is characterized by the formula |(Na+12(H2O)27|8[Al12Si12O48]8 which corresponds to its most common hydrated sodium form (International Zeolite Association -IZA). Sodium ions in zeolite A can be exchanged with other cations such as lithium (Li-LTA), potassium (K-LTA), or calcium (Ca-LTA) (Townsend and Coker 2001). The principal building units of zeolite A are sodalite cages which are connected by four-membered rings forming a three-dimensional (3D) network (Fig. 1). These cages consist of central cavities of 11.4 Å in diameter (supercage) interconnected by eight-ring openings with a 4.1 Å aperture, thus forming a remarkably open zeolite framework with a high void volume fraction of 47 % (McCusker and Baerlocher 2001). The structure is cubic, represented by ao = 11.919 Å and the space group Pm-3m. When Na+ is exchanged with the larger K+, the pore opening is reduced to...
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References
Flanigen EM (1980) Molecular sieve zeolite technology-the first twenty-five years. Pure Appl Chem 52:2191–2211
International Zeolite Association (IZA). http://www.iza-online.org. Accessed December 2015
McCusker LB, Baerlocher C (2001) Zeolite structures. In: van Bekkum H, Flanigen EM, Jacobs PA, Jansen JC (eds) Introduction to zeolite science and practice, studies in surface science and catalysis, vol 137. Elsevier, London, pp 37–67
Morigami Y, Kondo M, Abe J, Kita H, Okamoto K (2001) The first large-scale pervaporation plant using tubular-type module with zeolite NaA membrane. Sep Purif Technol 25:251–260
Reed TB, Breck DW (1956) Crystaline zeolites. II. Crystal structure of synthetic zeolite, type A. J Am Chem Soc 78:5972–5977
Townsend RP, Coker EN (2001) Ion exchange in zeolites. Stud Surf Sci Catal 137:467–491
Yu J (2007) Synthesis of zeolites. In: Cejka J, van Bekkum H, Corma A, Schueth F (eds) Introduction to zeolite molecular sieves, studies in surface science and catalysis, vol 168. Elsevier, Amsterdam, pp 39–104
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Julbe, A., Drobek, M. (2016). Zeolite A Type. In: Drioli, E., Giorno, L. (eds) Encyclopedia of Membranes. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-44324-8_604
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