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Plutonium alloys can be produced by adding a metal to molten plutonium. If the alloying metal is reductive enough, plutonium can be added in the form of oxides or halides. The δ phase plutonium–gallium alloy (PGA) and plutonium–aluminium alloy are produced by adding Pu(III) fluoride to molten gallium or aluminium, which has the advantage ...
Molten metal must be kept in a vacuum or an inert atmosphere to avoid reaction with air. [9] At 135 °C the metal will ignite in air and will explode if placed in carbon tetrachloride. [10] Plutonium pyrophoricity can cause it to look like a glowing ember under certain conditions. Twenty micrograms of pure plutonium hydroxide. Plutonium is a ...
Physical properties; Phase at ... Spectral lines of plutonium: Other properties; Natural occurrence: ... Hypothetical chemical elements (75)
When heated to 150–180 °C, it decomposes with autooxidation to plutonium (VI) with the formation of plutonyl nitrate (PuO 2 (NO 3) 2).Upon evaporation of concentrated nitric acid solutions of plutonium nitrate and alkali metal nitrates, double nitrates of the composition Me 2 [Pu(NO 3) 6] are formed, where Me = Cs +, Rb +, K +, Tl +, NH 4 +, analogous to ceric ammonium nitrate.
This makes plutonium very sensitive to changes in temperature, pressure, or chemistry, and allows for dramatic volume changes following phase transitions. [4] Unlike most materials, plutonium increases in density when it melts, by 2.5%, but the liquid metal exhibits a linear decrease in density with temperature. [ 5 ]
Plutonium(IV) oxide, or plutonia, is a chemical compound with the formula Pu O 2. This high melting-point solid is a principal compound of plutonium . It can vary in color from yellow to olive green, depending on the particle size, temperature and method of production.
Plutonium arsenide forms black or dark gray crystals of a cubic system, [2] space group Fm3m, cell parameters a = 0.5855 nm, Z = 4, structure of the NaCl-type. [3] At high pressure (about 35 GPa), a phase transition occurs to a structure of the CsCl-type. [4] At a temperature of 129 K, PuAs transforms into a ferromagnetic state. [5]
Plutonium nitride can be prepared by the reaction of plutonium hydrides with nitrogen or ammonia at a temperature of 650 °C and a pressure of 0.3 kPa. [3] Another method to prepare plutonium nitride is from the reduction of plutonium(III) iodide with sodium in liquid ammonia: PuI 3 + NH 3 + 3Na → PuN + 3NaI