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Heat treatment of metamict euxenites, polymignites, yttrotantalites, samarskites, pyrochlores, and allanites

Published online by Cambridge University Press:  14 March 2018

J. Lima-de-Faria
J. Lima-de-Faria*
Affiliation:
Mineralogical Museum, Section of the Junta de Investigações do Ultramar, Faculty of Science, Lisbon, Portugal
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Summary

The standard thermal treatments proposed by Lima-de-Faria have been applied to metamict euxenites, polymignites, yttrotantalites, samarskites, pyrochlores, and allanites. In the case of these metamict niobotantalates a facecentred cubic phase is formed at 700° C., and at 1000°C. a more characteristic phase appears combined with the cubic one. In the case of allanites only a slight formation or strengthening of the original structure of allanite appears at 700°C., and at 1000°C. a cubic phase is formed together with other phases.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 31 , Issue 242 , September 1958 , pp. 937 - 942
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1958

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References

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