Specific Surface Determination of Expansible Layer Silicates

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Science  16 Mar 1962:
Vol. 135, Issue 3507, pp. 929-930
DOI: 10.1126/science.135.3507.929


The vacuum-oven technique for quantitative sorption of a glycerol duointerlayer by montmorillonite at 35°C is adapted to 130°C to obtain a mono-inter-layer of glycerol, glycerol vapor relative pressure being controlled by temperature differential. Values obtained for montmorillonite agree closely with theoretical values based on liquid glycerol density, while vermiculite retains a mono-interlayer of somewhat less than liquid glycerol density.