Abstract
RECENTLY, Piermarini and Weir1 found a high-pressure transition (from the face-centred cubic to the cæsium chloride-type structure) between 9 and 15 kbar in anhydrous rubidium fluoride. Somewhat later transitions were also found for cæsium fluoride and potassium fluoride2. Bridgman3 found no evidence for high-pressure polymorphs in any of the alkali fluorides and noted that the fluorides appeared to be anomalous in this respect. For the case of sodium fluoride Bridgman4 stated that “the shearing curve definitely has a maximum near the end of the pressure range, leading to the expectation of a transition. Because of the interest which any transition in this particularly simple compound would have, unusually careful exploration was made with the volume apparatus. Runs were made at 25°, 125°, 150°, and 175° C. It is certain that there is no transition with the large volume change associated with the change from face centred to body centred, which is the transition anticipated”.
Similar content being viewed by others
Article PDF
References
Piermarini, G. J., and Weir, C. E., J. Chem. Phys., 37, 1887 (1962).
Weir, C. E. (personal communication).
Bridgman, P. W., Phys. Rev. 48, 893 (1935).
Bridgman, P. W., Proc. Amer. Acad. Arts Sci., 72, 45 (1937).
Kennedy, G. C., and Newton, R. C., Solids under Pressure (McGraw-Hill Book Co., Inc., New York, 1963).
Jayaraman, A., Klement, W., Newton, R. C., and Kennedy, G. C., J. Phys. Chem. Solids, 24, 7 (1963).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
PISTORIUS, C., ADMIRAAL, L. New High-pressure Polymorph of Sodium Fluoride. Nature 201, 1321 (1964). https://doi.org/10.1038/2011321a0
Issue Date:
DOI: https://doi.org/10.1038/2011321a0
This article is cited by
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.