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a b s t r a c tResearch into the fundamental properties of microcapsules and use of the results to develop a wide variety of products in industries such as printing, fast-moving consumer goods, construction, pharmaceuticals, and agrochemicals is a dynamic and ever-progressing field of study. For microcapsules to be effective in providing protection from harsh environments or delivering large payloads, it is essential to have a good understanding of their properties to enable quality control during formulation, storage, and applications. This review aims to outline the commonly used techniques for determining the physicochemical, structural, and mechanical properties of microcapsules, and highlights the interlinked nature of these three areas with respect to the end-use industrial application. This review provides information on techniques that are well supported in the literature, and also examines microcapsule analytical techniques that will become more prevalent as a result of new technological developments or extensions from other areas of study.

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Mononuclear ternary actinide hydroxo carbonato complexes AnO2(OH)y(CO3)zq have been studied computationally for An = Np(V), Np(VI), and U(VI). Density functional calculations were carried out to examine complexes with up to two carbonate and two hydroxide ligands. This study focusses on ternary Np(V) complexes suggested by experiment. Geometry parameters of hydroxo carbonato complexes lie between the corresponding values of hydroxo and carbonato complexes with the same number of anionic ligands. We used calculated bond lengths to interpret an EXAFS experiment. We determined a tendency to decreasing complexation energies for series of complexes with a constant number of anionic ligands and increasing numbers of carbonate ligands. Our results suggest that mononuclear hydroxo carbonato complexes should also exist for An(VI). Complexation energy trends of An‐OH‐CO3 complexes also yield a new perspective on the open debate on complexation constants of Np(V) hydroxo complexes. The consistently calculated properties of the An‐OH‐CO3 system and their trends will be helpful for further experimental characterization.

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