- and K-edge X-ray absorption fine structure (XAFS) techniques. Slight differences in the bond energies of bonds in the vicinity of the water-induced amorphous-to-crystalline transformation. This transformation involves a change in the coordination geometry, from tetrahedral to octahedral, through the rearrangement of CN-Co(M) bonds via cleavage/reformation, giving rise to the desirable water uptake characteristics.
Yoshino et al. (2026) studied this question.