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A thermal study of thaumasite

Published online by Cambridge University Press:  14 March 2018

M. Font-Altaba
M. Font-Altaba*
Affiliation:
Instituto de Edafología y Fisiología Vegetal, Barcelona, Spain
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Summary

A differential thermal analysis curve of thaumasite shows an endothermal peak at 206° C., correspinding to the loss of H2O and CO2, and a weak exothermal peak at 709° C., corresponding to recrystallization to a mixture of anhydrite and larnite, as is shown by X-ray powder photographs of material heated to 950° C. Improved powder data for thaumasite are given: the three strongest lines are at 9·66, 3·79, and 4·58 Å., and the cell-dimensions are a 10·992, c 10·311 Å.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 32 , Issue 250 , September 1960 , pp. 567 - 572
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1960

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References

The following references are additional to the bibliography of thaumasite given by Voot, T., Norsk. Geol. Tidsskr., 1938. vol. 18, p. 291, and those cited by D. C.Google Scholar
Knill, , Min. Mag., 1960. vol 32, p. 416.Google Scholar
Brú, (L.), Cueero, (M.), and Perez Rordriguez (M.), 1954. An. Real Soc. Espafi. Fis. Quire., set. A, vol. 50, p. 105.Google Scholar
Brú, (L.), Cueero, (M.), and LoPEz (A.), 1957. Ibid., vol. 53, p. 67.Google Scholar