A time resolved, <i>in-situ</i> X-ray diffraction study of the de-intercalation of anions and lithium cations from [LiAl<sub>2</sub>(OH)<sub>6</sub>]<i><sub>n</sub></i>X•<i>q</i>H<sub>2</sub>O (X = Cl<SUP>-</SUP>, Br