Preparation and purification of GdCl/sub 3/
Conference
·
OSTI ID:6296308
GdCl/sub 3/ has been prepared from high purity Gd/sub 2/O/sub 3/ with NH/sub 4/Cl as the chlorinating agent. The optimum time, temperature, air flow rate, and the mixing ratio of Gd/sub 2/O/sub 3/ and NH/sub 4/Cl for chlorination were determined. Almost complete conversion (99.8%) of Gd/sub 2/O/sub 3/ to GdCl/sub 3/ was obtained with 2.5 times or more the theoretical amount of NH/sub 4/Cl and with at least a 20 hr reaction time at 250/sup 0/C under a dried air flow. The excess NH/sub 4/Cl was removed from the GdCl/sub 3/ by sublimation at 350/sup 0/C in vacuum. The resulting GdCl/sub 3/ was purified to a dense crystalline GdCl/sub 3/ by distillation in vacuum using Ta crucibles and condensers.
- Research Organization:
- Ames Lab., IA (USA)
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 6296308
- Report Number(s):
- IS-M-209; CONF-790641-3
- Country of Publication:
- United States
- Language:
- English
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