Water in Montmorillonites
Positron lifetime was measured for pure and water filled montmorillonites (MMT) at room temperature. The size of free volume was correlated with interlayer distances from X-ray diffraction for different content of water in MMT. Free volume in samples with water content above 10 % (mass percentage) is smaller in comparison with bulk water. Time dependence of release of water from MMT under vacuum will be discussed.
B. Sláviková et al., "Water in Montmorillonites", Materials Science Forum, Vol. 666, pp. 119-122, 2011