Letter | Published:

Identification of the Montmorillonite Group of Minerals by X-Rays

Nature volume 154, pages 577578 (04 November 1944) | Download Citation

Subjects

Abstract

THIS group of clay minerals (referred to hereafter for brevity simply as "montmorillonite"), which is often found in soil clays, fuller's earth and bentonite, is characterized by the variation of the position of the basal reflexion, on an X-ray powder or aggregate diagram, from about 10 to about 18 A., according to the state of hydration1. The minerals of the group are notoriously difficult to identify positively from a single X-ray diagram because (a) the line at 14 A., which is given by montmorillonite in a normal state of hydration, is liable to be confused with a basal reflexion from chlorite or vermiculite, both of which might occur in soil clays; and (b) the basal reflexion may be diffuse, due to the simultaneous occurrence, in the crystallites, of two or more different basal spacings.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.

from$8.99

All prices are NET prices.

References

  1. 1.

    , Z. Krist., 93, 481 (1936).

  2. 2.

    , "The Mineralogy of Soil Colloids" (Tech. Com. No. 42, Imperial Bureau of Soil Science, Harpenden), p. 15.

  3. 3.

    See , and , Soil Sci., 57, 215 (1944) where references are given to the previous papers of the series.

  4. 4.

    , J. Sci. Instr., 18, 100 (1941).

Download references

Author information

Affiliations

  1. Macaulay Institute for Soil Research, Aberdeen. Sept. 16.

    • DOUGLAS M. C. MACEWAN

Authors

  1. Search for DOUGLAS M. C. MACEWAN in:

About this article

Publication history

Published

DOI

https://doi.org/10.1038/154577b0

Further reading

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.