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Some problems encountered in the identification of plumbogummite minerals in soils

Published online by Cambridge University Press:  09 July 2018

A. S. Campbell ,
J. A. Adams  and
D. T. Howarth
A. S. Campbell
Affiliation:
Soil Science Department, Lincoln College, University of Canterbury, New Zealand
J. A. Adams
Affiliation:
Soil Science Department, Lincoln College, University of Canterbury, New Zealand
D. T. Howarth
Affiliation:
Soil Science Department, Lincoln College, University of Canterbury, New Zealand
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Abstract

The use of HF digestion to concentrate minerals of the plumbogummite group is discussed. Prolonged treatment is shown to result in solution of plumbogummite minerals, and in precipitation of HCl-insoluble, complex fluorides. These yield X-ray diffraction spacings that may be confused with those of plumbogummite minerals. The presence of fluorides in digestion residues is confirmed by X-ray diffraction, DTA and by identifying the products formed when such residues are heated to 600°C.

Type
Research Article
Information
Clay Minerals , Volume 9 , Issue 4 , December 1972 , pp. 415 - 423
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1972

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References

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