Solid-state reactions
Actinide speciation using synchrotron radiation

The following example focuses on the thermal diffusion mechanisms of trivalent metal ions in a solid matrix, hydroxyapatite. Trivalent europium has been studied here as an analog of americium (III). The apatite used in this study has a monoclinic structure (a = b = 9.46 Å, c = 6.88 Å) and its exact formulation is : Ca_9.1Na_0.50(PO₄)_4.7(HPO₄)_1,3(OH)₂2 · 9 H₂O One of the main features of this type of solid is, on the one hand, the existence of distinct cationic sites Ca1 and Ca2 arranged hexagonally around the c-axis and, on the other...