Element 126 (unbihexium) on the periodic table was originally labeled Hawkingium, but frequent use has caused the nasal to be dropped, and is now referred to as Hawkinium. It was discovered during the middle of the 21st century, though its only truly stable isotope, hawkinium 310, was not refined until the end of the century. This potentially stable isotope was predicted long beforehand, and Stephen Hawking's name was reserved for its discovery in order to honor his achievements. It is one of three truly synthetic elements to be both relatively stable and have unique chemical properties, the other two being Planckium (element 122) and Slotinium (element 124).
A 'victim' of superactinide contraction, hawkinium is by far the densest, stable, non-exotic element known, with a density nearly four times that of lead. It is chemically surprisingly stable, though it does slowly oxidize in air. It is mildly toxic in large quantities to most un-engineered organisms,
Hawkinium does not have a well-defined solid or liquid state. In its pure form, it can be molded as if it were stiff clay at room temperature, and increasing temperatures make it more and more malleable until it is clearly a liquid. Its boiling/sublimation point is nearly six thousand Kelvin, higher than tungsten but lower than seaborgium.
Hawkinium is usually used as an alloy, tamper, or neutron reflector. In the former case, it generally increases the temperature resistance as well as providing some amount of strength, although it does not significantly increase yield strength which limits its use in such applications. As part of a californium nuke, it serves as an excellent tamper and neutron reflector, as well as undergoing spontaneous fission itself under such stress. This, of course, limits the popularity of its production.
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