Only zirconolite and perovskite can accommodate actinides.
2.
It occurs as interstitial grains with zirconolite, baddeleyite, and apatite associated with late stage intergrowths of quartz and feldspar.
3.
Immobilising weapons-grade plutonium or transuranium wastes instead of bulk HLW may essentially change the Synroc phase composition to primarily zirconolite-based or a pyrochlore-based ceramic.
4.
For example, Synroc-C is designed to contain about 20 wt . % of calcined HLW and it consists of approximately ( in wt . % ) : 30 hollandite; 30 zirconolite; 20 perovskite and 20 Ti-oxides and other phases.
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