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Volatility of PuO 2 in Nonreducing Atmospheres
Author(s) -
PARDUE WILLIAM M.,
KELLER DONALD L.
Publication year - 1964
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1964.tb13116.x
Subject(s) - vaporization , volatility (finance) , oxygen , argon , analytical chemistry (journal) , chemistry , vapor pressure , suboxide , mineralogy , oxygen pressure , metallurgy , materials science , environmental chemistry , organic chemistry , financial economics , economics
The vapor pressure of plutonium dioxide (PuO 2 ) was investigated in the range 1450° to 1775°C in air, argon, and oxygen atmospheres by a transpiration technique. There were strong indications that PuO 2 can vaporize congruently or as a suboxide species, depending on the atmosphere. The δH° 298 for vaporization in 1 atm of oxygen is approximately 154,000 cal per mole. The estimated standard free energy of formation (δG° f ) of gaseous PuO 2 is −121,000 + 10.7 T from 1227° to 1827°C.