ON THE OXIDES OF CERIUM. V. HIGH-TEMPERATURE-X-RAY DIFFRACTION OF CERIUM OXIDE

Journal Article · Tue Nov 01 04:00:00 EST 1960 · J. Inorg. & Nuclear Chem.

DOI:https://doi.org/10.1016/0022-1902(60)80091-7· OSTI ID:4087386

Brauer, G; Gingerich, K A

Samples of cerium oxide with compositions of CeO/sub 2.o//sub o/ to CeO/ sub 1.7//sub 8/ were examined by high-temperature x-ray diffraction between 20 and 1000 deg C. From these experiments the phase relation in this region is fully explained for the first time. All phase transitions occur very rapidly. The composition of the phase boundaries changes considerably with the temperature; in particular, a miscibility gap, which has the boundaries CeO/sub 2.0//sub 0/ and CeO/sub 1.8//sub 1/ at room temperatu re, contracts with rising temperature and closes at 685 deg C and at a composition of CeO/sub 1.9//sub 2/. At higher temperatures a homogeneous series of mixed crystals with cubic fluorite structure exists as is predicted for such a system. A summarising discussion is given for the system of the cerium oxides, including the measurements of oxygen dissociation pressure. (auth)

• Research Organization: Universitat, Freiburg i.B.
• NSA Number: NSA-15-010796
• OSTI ID: 4087386
• Report Number(s): NP-tr-893
• Journal Information: J. Inorg. & Nuclear Chem., Journal Name: J. Inorg. & Nuclear Chem. Vol. Vol: 16
• Country of Publication: Country unknown/Code not available
• Language: German

Related Subjects

ALLOTROPY
CALCIUM FLUORIDES
CERIUM OXIDES
CHEMISTRY
CONFIGURATION
CRYSTALS
DECOMPOSITION
DIFFRACTION
FLUORITE
HIGH TEMPERATURE
HYDROLYSIS
LATTICES
MEASURED VALUES
OXYGEN
PHASE DIAGRAMS
PHASE TRANSFORMATION
PRESSURE
PYROLYSIS
SAMPLING
STANDARDS
X RADIATION