Basaluminite, Al 4 (OH) 10 SO 4 X5H 2 O from Northamptonshire and Kansas showed reversible expansion and contraction equivalent to 1 layer of interlayer adsorbed water between 100 percent and 0 percent (over P 2 O 5 ) relative humidity. This characteristic supports the previous suggestion that the crystalline basic aluminum sulfate formed upon aging the partially neutralized solution of Al 2 (SO 4 ) 3 in the presence of montmorillonite was basaluminite. In the absence of clay, the crystalline basic aluminum sulfates that formed at 50 degrees C, had compositions, thermal analysis features, and solubility products similar to basaluminite but had a slightly different crystalline form.

First Page Preview

First page PDF preview
You do not currently have access to this article.