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Letter

Nature Materials 7, 551–555 (1 July 2008) | doi:10.1038/nmat2220

Determining the aluminium occupancy on the active T-sites in zeolites using X-ray standing waves

Jeroen A. van Bokhoven , Tien-Lin Lee , Michael Drakopoulos , Carlo Lamberti , Sebastian Thie|[szlig]| & J|[ouml]|rg Zegenhagen

Zeolites are microporous crystalline materials that find wide application in industry, for example, as catalysts and gas separators, and in our daily life, for example, as adsorbents or as ion exchangers in laundry detergents. The tetrahedrally coordinated silicon and aluminium atoms in the zeolite unit cell occupy the so-called crystallographic T-sites.