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amounts of voluminous cations, U
4+
(Gautron et al., 2006; Greaux et al.,
2008).
The study by Karnis and Gautron (2009) showed that diopside-based
glass-ceramics (CaMgSi
2
O
6
composition) incorporated up to about 9 wt% of
CdO (or 1.5 at% of Cd) inside diopside crystals without significant structural
change. In these glass-ceramics, two new phases were observed and can be
envisaged as good candidates for Cd or Pb immobilization. The new Cd-rich
phase contains up to 41 wt% of CdO (9 at% of Cd) while the new Pb-rich
phase contains about 57 wt% of PbO (9.8 at% of Pb).
Figure 4.Cadmium precipitation and Inertization Methods.
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