Vapor Pressure of Thorium Tetrafluoride
- North American Aviation, Inc., Canoga Park, CA (United States). Atomics International Div.
The vapor pressures of solid and liquid ThF4 have been determined. For the solid phase, the Knudsen effusion method was used over the temperature range of 1055° to 1297° K for the liquid, the quasi-static method of Rodebush and Dixon was used between 1437° and 1595° K. The vapor pressure equation for the solid is log P(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° K) is 61.6 kcal per mole, using an estimate of -19 cal per deg per mole for ΔCp. Both the vapor pressure results and a mass spectrometric examination of the vapor indicate that thorium tetrafluoride vaporizes as the monomer.
- Research Organization:
- North American Aviation, Inc., Canoga Park, CA (United States). Atomics International Div.
- Sponsoring Organization:
- US Atomic Energy Commission (AEC)
- DOE Contract Number:
- AT(11-1)-GEN-8
- NSA Number:
- NSA-12-015383
- OSTI ID:
- 4303839
- Report Number(s):
- NAA-SR--2710
- Country of Publication:
- United States
- Language:
- English
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