Radiochemische Untersuchungen an Festkörperverbindungen II. Isotopenaustauschreaktionen an schwerlöslichen Co‐Verbindungen

1. To clear up the reactivity of solids with isotope‐exchange experiments in solid‐solution systems, four well defined Co compounds with different structures were chosen:\documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {{\rm Co}({\rm OH})_2 \,({\rm A}),\quad {\rm CO}({\rm OH})_{1,5} {\rm Cl}_{0,5} \,({\rm B}),\quad 4\,{\rm Co}({\rm OH})_2,\,{\rm Co}({\rm OH}){\rm Cl}\,({\rm C}),\quad {\rm and}} \\ {4\,{\rm Co}({\rm OH})_2,\,{\rm Co}_{1,25} {\rm OH}({\rm NO}_3)_{1,5} \,({\rm D}).} \\ \end{array} $$\end{document}A and B have perfectly ordered lattices. C and D are substances with partly defect structures; they have a double‐layer structure, where ordered main layers of Co(OH) 2 alternate with intermediate partly disordered layers of basic salt.