The structure of the simplest permutite
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The simplest permutite is isostructural with the mineral sodalite, but there are hydroxyl ions in the 000, 1/2 1/2 1/2 positions instead of chlorine ions, and the oxygen atoms are somewhat displaced.
The cell constant of permutite increases from 8.93 to 9.03 A, on heating to 850°.
The conclusion follows from the packing of the molecules in the hexagonal structure of ice that the voids of permutite contain 10 molecules of water, of which two are in the form of hydroxyl while the remaining eight are in the form of zeolite water.
KeywordsOxygen Hydroxyl Zeolite Hexagonal Chlorine
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