X-RAY CRYSTALLOGRAPHIC STUDIES OF EUROPIUM OXIDES AND HYDROXIDES
X-ray-diffraction methods were employed to study the phases occurring in the europium-oxygen system and in the europium hydroxide decomposition process. Europium sesquioxide, Eu/sub 2/O/sub 3/, containing trivalent europium ions, occurs in two forms, body-centered cubic and monoclinic. Divalent europium forms a monoxide, EuO, which is facecentered cubic. Both divalent and trivalent ions are combrned in the compound Eu/sub 3/O/sub 4/, which is orthorhombic. Another orthorhombic compound of unknown composition was obtained which is also believed to contain divalent and trivalent ions. Studies on the thermal decomposition of europium hydroxide to the sesquioxide yielded data on two hydroxide phases. The startrng material, Eu(OH)/sub 3/, is hexagonal and decomposes into an intermediate phase, EuOOH, which is believed to be orthorhombic. (auth)
- Research Organization:
- General Electric Co. Advanced Technology Services, Cincinnati
- DOE Contract Number:
- AT(40-1)-2847
- NSA Number:
- NSA-17-033861
- OSTI ID:
- 4670398
- Report Number(s):
- CONF-20-18; TM-63-2-8
- Country of Publication:
- United States
- Language:
- English
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