Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Rare earth metal
Reexamination Certificate
2006-10-17
2006-10-17
Vanoy, Timothy C. (Department: 1754)
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Rare earth metal
C423S263000
Reexamination Certificate
active
07122163
ABSTRACT:
A crystalline rare-earth oxide or sulfide which has an average particle diameter of 10 nm or less and in which the rare-earth element has a low valance, in particular, crystalline EuO or EuS of nano size. The rare-earth oxide or sulfide is produced by irradiating an inorganic acid salt or organic acid salt of a rare-earth element having a high valence with a light in the range of from UV to visible light in the presence of: a compound which, upon irradiation with the light in the range of from UV to visible light induces a photooxidation-reduction reaction and simultaneously converts the rare-earth ions having a high valence into ions having a low valence; and a cholagen source compound which immediately reacts with the low valence ions to form a cholagen compound.
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Hasegawa Yasuchika
Wada Yuji
Yanagida Shozo
Japan Science and Technology Agency
Sherman & Associates
Vanoy Timothy C.
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