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The mineralogy of some commercial vermiculites

Published online by Cambridge University Press:  14 March 2018

H. G. Midgley  and
C. M. Midgley
H. G. Midgley
Affiliation:
Building Research Station, Garston, Watford, Herts
C. M. Midgley
Affiliation:
Building Research Station, Garston, Watford, Herts
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Abstract

A number of different commercial vermiculites have been examined and it has been found that the exfoliable minerals can be divided into three main groups; those which give a 26 Å spacing on an X-ray diffraction pattern, those which give a 14 Å spacing, and those which give various spacings and are partially dehydrated. All are mixed-layer minerals of one type or another, but all have some vermiculite layers in their constitution. The expansibility of these minerals is not linked with their structural types, but there is an indication that the largest expansion is associated with the occurrence of hydrobiotite and the lowest expansion with the occurrence of true vermiculite.

Type
Research Article
Information
Clay Minerals Bulletin , Volume 4 , Issue 23 , July 1960 , pp. 142 - 150
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1960

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References

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