| Identification | Back Directory | [Name]
tetraammonium uranyl tricarbonate, of uranium depleted in uranium-235 | [CAS]
18077-77-5 | [Synonyms]
Ammonium Uranium Carbonate
tetraammonium uranyl tricarbonate, of uranium depleted in uranium-235 | [EINECS(EC#)]
241-988-5 | [Molecular Formula]
C3O11U.4H4N | [Molecular Weight]
522.26 |
| Chemical Properties | Back Directory | [density ]
2.26 g/cm3(Temp: 57.00 °C) | [solubility ]
Sparingly soluble in water; insoluble in alcohol and ether | [form ]
Well-formed, transparent yellow crystals, monoclinic prismatic |
| Hazard Information | Back Directory | [Uses]
In uranium yellow glazes. | [Production Methods]
The (NH4)2U2O7 is precipitated from an aqueous solution of 10 g of UO2(NO3)2 ? 6 H2O by the addition of a cone. ammonia. The fine yellow powder is suction-filtered, washed with water, and stirred with an excess of cone. (NH4)2CO3 solution for about 10 minutes (the flask is on a 70°C water bath). The clear supernatant liquid is decanted and allowed to stand overnight. Yellow crystals precipitate; these are filtered with suction and dried in air. The residue of undissolved (NH4)2U2O7 is treated several times with the mother liquor at 70°C, as described above until crystals no longer form on cooling.
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