Synthesis and Study of 239Pu-Doped Gadolinium-Aluminum Garnet

Ion irradiation-induced amorphization and nano-crystal formation in garnets

“…Fig. 1 The structure of garnet has a number of important similarities to zircon, ZrSiO 4 . Zircon (I4 1=amd , Z ¼ 4) consists of an edge-sharing framework of A-site dodecahedra and X-site tetrahedra.…”

“…Garnet is a candidate for the immobilization of HLW because the garnet structure can incorporate actinides, zirconium and rare earth elements. Garnet based ceramics have recently been synthesized for the immobilization of actinide elements [3][4][5][6]. Synthetic garnets incorporating rare earth elements are also important for other industrial applications, particularly yttrium aluminum garnet (YAG), Y 3 Al 5 O 12 , and YAG doped by other ions for use in laser systems and in digital display systems [7].…”

“…The potential actinide-bearing silicates that have previously been studied by ion-irradiation experiments include zircon, ZrSiO 4 [10,13,14]; silicate-apatite, Ca 4Àx REE 6þx (SiO 4 ) 6Ày (PO 4 ) y O 2 [15] and sphene, CaTi(SiO 4 )O [16].…”

Radiation effects in ferrate garnet

“…[1][2][3][4]). Many minerals have been proposed as potential actinide waste forms, and recently garnet structures have been synthesized that incorporate actinides [5][6][7]. Ca-bearing garnets have been of interest because variations in the Ca/Sr composition can be used to maintain charge balance [5].…”

Stability of artificial ferrite garnets with actinides and lanthanoids in water solutions

“…Burakov et al (1999) proposed for the first time to use garnets, with tetrahedral (Al/Ga)O 4 and octahedral (Al/Ga)O 6 structures, as confinement matrices. However, the content of U and Pu in such garnets does not exceed 5 wt % (Burakov et al, 2000). Based on the study of crystal chemistry, Yudintsev (2003) demonstrated that significant amounts of actinides and REEs can be incorporated into garnets in which Fe 3+ ions occupy the tetrahedral structural sites and a part of the octahedral sites.…”