Abstract
As is well known, the ordinary form of quartz which has trigonal symmetry changes over reversibly to another form which has hexagonal symmetry at a temperature of 575° C. Though the transformation does not involve any radical reorganization of the internal architecture1 of the crystal and takes place at a sharply defined temperature, it is nevertheless preceded over a considerable range of temperature (200°–575°) by a progressive change in the physical properties of low quartz which prepares the way for a further sudden change, when the transition to high quartz actually takes place. The thermal expansion coefficients, for example, gradually increase over this range of temperature, becoming practically infinite at the transition point and then suddenly dropping to small negative values2. Young's moduli in the same temperature range fall to rather low values at the transition point and then rise sharply to high figures3. The piezo-electric activity also undergoes notable changes4,5.
Similar content being viewed by others
Article PDF
References
Bragg and Gibbs, Proc. Roy. Soc., A, 109, 405 ( 1925 ).
Jay, Proc. Roy. Soc., A, 142, 237 ( 1933 ).
Perrier and Mandrot, C.R., 175, 622 ( 1922 ).
Osterberg and Cookson, J. Frank. Inst., 220, 361 ( 1935 ).
Pitt and Mckinley, Canad. J. Res., A, 14, 58 (1936).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
RAMAN, C., NEDUNGADI, T. The α-β Transformation of Quartz. Nature 145, 147 (1940). https://doi.org/10.1038/145147a0
Issue Date:
DOI: https://doi.org/10.1038/145147a0
This article is cited by
-
High-temperature behavior of quartz-in-garnet system revealed by in situ Raman spectroscopy
Physics and Chemistry of Minerals (2023)
-
Investigations on Self-extinction of Incense Sticks
Fire Technology (2023)
-
Teleology and function in non-living nature
Synthese (2023)
-
The thermal behaviour of silica varieties used for tool making in the Stone Age
Journal of Thermal Analysis and Calorimetry (2018)
-
Temperature dependence on the electron paramagnetic resonance spectra of natural jasper from Taroko Gorge (Taiwan)
Physics and Chemistry of Minerals (2010)
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.