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| | Uranium tetrafluoride Basic information |
| | Uranium tetrafluoride Chemical Properties |
| Melting point | >1100° | | Boiling point | 1446.94°C (estimate) | | density | 6.700 | | solubility | soluble in concentrated acid solutions, alkaline solutions | | form | green monoclinic crystals | | color | green monoclinic crystals, crystalline | | Water Solubility | insoluble H2O; soluble conc acids, alkalies, but decomposes [MER06] | | Specific Heat Capacity | Cp(crystal): 0.37 J/(g·K); Cp(gas): 0.29 J/(g·K), at 25℃ | | EPA Substance Registry System | Uranium tetrafluoride (10049-14-6) |
| RIDADR | 2912 | | TSCA | TSCA listed | | HazardClass | 7 |
| | Uranium tetrafluoride Usage And Synthesis |
| Description | Uranium tetrafluoride, with the molecular formula of UF4, is a green, nonvolatile, crystalline powder that is insoluble in water. It is highly corrosive and is also a radioactive poison. | | Chemical Properties | Green, nonvolatile, crystalline powder.
Insoluble in water. | | Uses | Intermediate in preparation of uranium metal.
See uranium hexafluoride. | | Preparation |
Dichlorodifluoromethane (Freon 12) is passed through a Hg pressure release valve, a bubble counter and aPsO5 tube into a glass or quartz reaction tube (diameter 2.5 cm, length 40 cm.) The reaction tube is inserted into a short electric furnace which can be heated to a temperature of 400℃. Powdered UO3 is placed in the reaction tube between glass-wool plugs. The escaping gases are led to the hood.
At the beginning, dry oxygen is passed through the apparatus for one hour, while the furnace is heated to 400℃. The oxygen flow is then replaced with CF2Cl2, which is introduced at a rate of one liter per hour. The reaction starts as soon as the temperature reaches 400°C. The progress of the reaction can be followed as the color of the product changes to green.
On completion of the reaction, the product is cooled in a stream of CF2Cl2; very pure UF4 is obtained. The yield is almost quantitative.
| | Hazard | Highly corrosive, radioactive poison. |
| | Uranium tetrafluoride Preparation Products And Raw materials |
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