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. 1972 Mar 3;175(4025):981-3.
doi: 10.1126/science.175.4025.981.

Exinct Superheavy Element in Meteorites: Attempted Characterization

Exinct Superheavy Element in Meteorites: Attempted Characterization

E Anders et al. Science. .

Abstract

If the unexplained fission xenon component in meteorites is due to a volatile superheavy element, this element must have had a heat of vaporization of 54 +/- 3 kilocalories per mole and a normal boiling point of 2500 degrees +/- 400 degrees K. The prime candidates are elements 111 and 115, followed by 113, 114, 112, and 116. Elements 105 to 110 are not volatile enough and can therefore be excluded.

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