VAPOR PRESSURE OF THORIUM TETRAFLUORIDE
The vapor pressures of solid and liquid ThF/sub 4/ have been determined. For the solid phase, the Knudsen effusion method was used over the temperature range of 1055 to 1297 deg K for the liquid, the quasi-static method of Rodebush and Dixon was used between 1437 and 1595 deg K. The vapor pressure equation for the solid is log P(/sub atm/) =-16,860/T + 9.105; and for the liquid, log P(atm) = --15,270/T + 7.940. The heat of vaporization at the extrapolated boiling point (1953 deg K) is 61.6 kcal per mole, using an estimate of --19 cal per deg per mole for DELTA Cp. Both the vapor pressure results and a mass spectrometric examination of the vapor indicate that thorium tetrafluoride vaporizes as the monomer. (auth)
- Research Organization:
- North American Aviation, Inc., Canoga Park, CA (United States). Atomics International Div.
- DOE Contract Number:
- AT-11-1-GEN-8
- NSA Number:
- NSA-12-015383
- OSTI ID:
- 4303839
- Report Number(s):
- NAA-SR-2710
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-58
- Country of Publication:
- United States
- Language:
- English
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