Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Chemistry and Pharmacology
The remarkable property of the metastable-stable transition of NaClO3 is that it occurs without disruption of the structure. The rearrangement occurs via coordinated atom displacements (sliding of layers) accompanied by a readjustment of the individual positions; overall this recalls certain characteristics of martensitic transitions. Whereas the Na+ and ClO-3 ions remain in an octahedral environment, with the same stacking, the Na and O atom coordinations are modified. In the metastable phase, each Na atom is bounded by nine O atoms, with anisotropic distribution of the bonds. In the stable phase, on the other hand, there are only six isotropic Na-O bonds. This explains the better mechanical stability of this phase.
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