Monoclinic-amorphous-cubic phase transitions in tetracyanoethylene under high pressure
- 1 April 1986
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 33 (7) , 5099-5101
- https://doi.org/10.1103/physrevb.33.5099
Abstract
On heating at 318 K, tetracyanoethylene (TCNE) undergoes a sluggish first-order transition from the cubic to the monoclinic phase which is irreversible on cooling at atmospheric pressure. Using x-ray diffraction we have now observed phase transitions at high pressures at 295 K from the monoclinic to an amorphous structure and then to the cubic structure. A consistent picture of phase transitions in TCNE is obtained on the basis of these results and those of earlier Raman scattering experiments.Keywords
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