Phasengleichgewichte in den systemen scandiumoxidoxide der actiniden (Th-Am)

Inorganic Compounds

“…8.25 this range corresponds to about 6 at.% U. Keller et al (1972) have also determined the maximum solid solubility of Sc 2 0 3 in A m 0 2 to vary from 0-25 at 1100°C to 2 4 mol% at 1550°C. ScAm0 3 has the orthorhombic perovskite GdFe0 3 -type structure, see Table 8.14.…”

“…The maximum solubility of Sc 2 0 3 in P u 0 2 varies from 0-25 at 1100°C to 1-2 mol% Sc 2 0 3 at 1550°C according to Keller et al (1972). ScPu0 3 is also isostructural with ScAm0 3 and the ScR0 3 (R = rare earth) compounds, see Table 8.14.…”

Americium

“…However, ternary oxides are known for Am(III) through Am(VI) (Keller, 1964Keller et al, 1965b;Radzewitz, 1966;Mosley, 1970;Keller et al, 1972;Keller and Berndt, 1975;Hoekstra and Gebert, 1978). Stabilization of high oxidation states in complex oxides is frequently observed (Keller, 1964(Keller, , 1967Morss, 1982); excellent examples are the thermally stable Am(VI) compounds Cs 2 AmO 4 and Ba 3 AmO 6 .…”