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A scheme of semi-micro analysis for the major elements in clay minerals, based on modifications to conventional methods of silicate analysis

Published online by Cambridge University Press:  09 July 2018

G. Pruden  and
H. G. C. King
G. Pruden
Affiliation:
Rothamsted Experimental Station, Harpenden, Herts
H. G. C. King
Affiliation:
Rothamsted Experimental Station, Harpenden, Herts
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Abstract

A scheme is presented for the semi-micro analysis for the major elements in clay minerals, based mainly on improvements to conventional colorimetric methods. Silica and alumina are determined after fusing a 50-mg sample with sodium hydroxide. Titanium, total iron, calcium, magnesium, phosphorus and manganese are determined colorimetrically on a hydrofluoric-sulphuric acid digest of a 50-mg sample; sodium and potassium are determined flame photometrically on the same digest. Ferrous iron is determined separately. Additional methods for the determination of total water, total sulphur and fluorine are indicated.

Type
Research Article
Information
Clay Minerals , Volume 8 , Issue 1 , July 1969 , pp. 1 - 13
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1969

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