Elements 112 to 119: Were They Present in Meteorites?

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Science  16 May 1969:
Vol. 164, Issue 3881, pp. 821-823
DOI: 10.1126/science.164.3881.821


Chondrites contain a small fission xenon component of unexplained origin. Evidence on the geochemical behavior of this component suggests that it was not derived from an actinide element (Z = 89 to 103), or from a transition metal between Z = 104 and 111, but from a more volatile progenitor. The most likely candidates are the superheavy elements between Z = 112 and 119, whose lighter congeners (mercury, tellurium, lead, and the like) are known to be strongly fractionated in meteorites.

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