Poorly crystalline boehmite

Alhydrogeh, aluminium hydroxide adjuvant aluminium oxy-hydroxide poorly crystalline boehmite pseudoboehmite Rehydragel. 

However, the nature, crystallinity (Kinniburg and Jackson, 1976, 1981 McKenzie, 1980), crystal size, and surface charge of metal oxides and mixed metal oxides (e.g., Fe-Al oxides Violante et al., 2003) also play an important role in the sorption selectivity of trace elements in cationic form. McBride (1982) compared the sorption behavior of different Al precipitation products of different crystallinity. The Cu sorption capacity followed tlie order noncrystalline Al-hydroxide > poorly crystalline boehmite > gibbsite. Iron and Mn oxides are... 

Pseudo-boehmite is poorly crystalline and is often the first crystalline form to appear when hydrous alumina gels are aged. Certain of the XRD peaks in pseudo-boehmite are shifted relative to boehmite and pseudo-boehmite is characterizedby higher water content. These differences have been explained by the exceedingly small crystallite size of pseudo-boehmite (Baker and Pearson, 1974) and the presence of interlayer water (Tettenhorst and Hoffman, 1980). In many cases commercial boehmite samples contain both well crystallized boehmite and pseudo-boehmite. 

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