Kaolinite intercalation procedure for all sizes and types with X-ray diffraction spacing distinctive from other phyllosilicates

Abstract--Kaolinites of all kinds (fine, 'fireclay, ' "type IV, ' etc.), some of which do not expand or expand incompletely with the usual intercalation methods used for comparison, are expanded completely by treatment ofdry (110 ~ clay with dry CsCl salt, followed by contact with hydrazine for 1 day at 65 ~ and then with DMSO overnight at 90 ~ Comparison treatments were grinding in KOAc, soaking in hydrazine, and Li-DMSO, as well as combination of these. Following the Cs-hydrazine-DMSO treatment, the 7.2, ~ spacing of l: 1 dioctahedral l yer silicates hifts to I 1.2/ ~ and the I 1.2/~/(7.2 + 11.2/~) ratio = 1.0. The trioctahedral 1:1 layer silicates and chlorite are not expanded by the Cs-hydrazine-DMSO procedure