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Some crystallographic studies in the system CaSOa4-CaSO4.2H2O I. The polymorphism of anhydrous CaSO4

Published online by Cambridge University Press:  14 March 2018

P. Gay
P. Gay*
Affiliation:
Department of Mineralogy and Petrology, University of Cambridge
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Summary

The existence and relationships of the polymorphs of CaSO4 have been studied by X-ray methods. Only two distinct phases are found: no crystallographic evidence is available to support the suggestion that the γ-CaSO4 structure can have two forms, and it is shown that most previous data on the existence of the high temperature α-CaSO4 polymorphs are likely to be due to decomposition of the sulphate.

Some observations on the γ to β-CaSO4 transformation are reported. The structural implications of these results and their relevance to the nature of the transformation are discussed.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 35 , Issue 270 , June 1965 , pp. 347 - 353
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1965

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References

References (for Parts I and II)

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