The incorporation of plutonium in lanthanum zirconate pyrochlore

An electron spin resonance and photoluminescence investigation of the effect of annealing temperature on Gd-doped La2Zr2O7 nano-ceramics

“…Trivalent rare earths are considered as possible surrogates for the trivalent minor actinides and can mimic trivalent plutonium Pu(III) [11]. In this regard, several actinide elements and their respective lanthanide surrogates have been incorporated in lanthanum based zirconate pyrochlores to understand their speciation [12][13][14].…”

Phase evolution and chemical durability of co-doped Gd2Zr2O7 ceramics for nuclear waste forms

“…In addition, glass matrix has a tendency to get devitrified in the presence of water and steam at high temperature and pressure [9,10]. By contrast, ceramic matrix such as gadolinium zirconate (Gd 2 Zr 2 O 7 ) has excellent physical and chemical properties, and it is considered as a suitable host materials for the immobilization of radioactive waste [11,12].…”

Structure and performance evolution of the system (Gd1−Nd )2(Zr1−Ce )2O7 (0 ≤x, y≤ 1.0)

“…For example, the solubility of Nd 3+ is investigated to simulate the incorporation of Am 3+ at the A site, and Ce 4+ is incorporated at the B site to simulate the solubility of Pu 4+ in Gd 2 Zr 2 O 7 [14][15][16]. While recently Gregg et al has shown that Pu can be exchanged for both the A and B site within lanthanum zirconate pyrochlore [17]. As Zhang et al focus on the formation of high actinide valence states during fabrication [18], other teams devotes to the radiation performance and mechanism in A 2 Zr 2 O 7 pyrochlores (A = La, Nd, Sm, Gd, and 241 Am) [4,19].…”