Electronic Resource
[S.l.]
:
International Union of Crystallography (IUCr)
Acta crystallographica
24 (1968), S. 657-666
ISSN:
1600-5724
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
Thin foils of U4O9 prepared from bulk single crystals of UO2 were investigated at 20 °C and between 300 °C and 1000 °C in the electron microscope. At 20 °C the complete reciprocal lattice of U4O9 has been established. Between about 550° and 700°C an order-partial disorder transformation has been found in most of the specimens investigated. This leads to a modified U−O phase diagram but at present it is not known if this new diagram or the old one represents metastable phase relations. Crystallographic relations between the low temperature phase and the partly disordered high-temperature phase of U4O9 − y have been deduced.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0567739468001427
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