E.R.DEGGINGER / SCIENCE PHOTO LIBRARY E.R.DEGGINGER / SCIENCE PHOTO LIBRARY
Zeolite minerals. View of a rock containing chabazite and natrolite, two different types of zeolite. Natrolite (hydrated sodium aluminium silicate, Na2(Al3Si3)O10.H2O2) is prominent as fibrous needles. Chabazite (hydrated calcium aluminium silicate Ca(Al2Si4)O12.6H2O) is less prominent. Both minerals are zeolites which are used in the chemistry industry as catalysts for absorbing gases. Zeolites are also used for removing molecules of a certain size. They are ideal for this as they are composed framework of aluminium, silicon & oxygen atoms. The framework creates channels through which molecules may be drawn down into the crystal.
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