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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. [14] Near the melting point, the liquid plutonium has very high viscosity and surface tension compared to other metals. [15]
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. [6] Densities of the different allotropes vary from 16.00 g/cm 3 to 19.86 g/cm 3 .
The density of plutonium-238 at room temperature is about 19.8 g/cc. [3] The material will generate about 0.57 watts per gram of 238 Pu. [4] The bare sphere critical mass of metallic plutonium-238 is not precisely known, but its calculated range is between 9.04 and 10.07 kilograms. [5]
This is an extended version of the energy density table from the main Energy density page: Energy densities table Storage type Specific energy (MJ/kg)
The higher the density, the lower the critical mass. The density of a material at a constant temperature can be changed by varying the pressure or tension or by changing crystal structure (see allotropes of plutonium). An ideal mass will become subcritical if allowed to expand or conversely the same mass will become supercritical if compressed.
Weapons-grade nuclear material is any fissionable nuclear material that is pure enough to make a nuclear weapon and has properties that make it particularly suitable for nuclear weapons use. Plutonium and uranium in grades normally used in nuclear weapons are the most common examples.
The government says it will dispose of its 140 tonnes of radioactive plutonium - currently stored at a secure facility at Sellafield in Cumbria. The UK has the world's largest stockpile of the ...
Density: 14.2 g/cm 3: Melting point: ... Plutonium nitride is a binary inorganic compound of plutonium and nitrogen with the chemical formula PuN. [1] [2] Synthesis