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Tungsten-184 (W-184)
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Contact usPhysical and chemical properties
| Melting point | 3695 K (3422 °C, 6192 °F) | |||
| Boiling point | 6203 K (5930 °C, 10706 °F) | |||
| Density (at 20° C) | 19.254 g/cm3 | |||
| Heat of fusion | 52.31 kJ/mol | |||
| Heat of vaporization | 774 kJ/mol |
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| Molar heat capacity | 24.27 J/(mol·K) | |||
product description
In its raw form, tungsten is a hard steel-grey metal that is often brittle and hard to work. Purified, monocrystalline tungsten retains its hardness (which exceeds that of many steels), and becomes malleable enough that it can be worked easily.It is worked by forging, drawing, or extruding but it is more commonly formed by sintering. Sintering is often used due to the very high melting point of tungsten.
Naturally occurring tungsten consists of four stable isotopes (182W, 183W, 184W, and 186W) and one very long-lived radioisotope, 180W. Theoretically, all five can decay into isotopes of element 72 (hafnium) by alpha emission, but only 180W has been observed to do so;on average, this yields about two alpha decays of 180W per gram of natural tungsten per year.This rate is equivalent to a specific activity of roughly 63 micro-becquerel per kilogram. This rate of decay is orders of magnitude lower than that observed in carbon or potassium as found on earth, which likewise contain small amounts of long-lived radioactive isotopes.
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