Spectroscopy at very high pressures. Part 8.—An infrared study of shear-stress-induced transitions in ammonium and sodium nitrates
- 1 January 1976
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics
- Vol. 72, 2069-2074
- https://doi.org/10.1039/f29767202069
Abstract
Bridgman showed that some second-order phase transitions which do not occur under conditions of hydrostatic compression can take place when, in addition, a shear stress is applied. In this paper we show that a diamond anvil cell used without a gasket around the sample is an excellent device for studying shear-stress-induced transitions. This is illustrated by i.r. spectra of NH4NO3 and NaNO3, for each of which a new phase was detected.Keywords
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