From: I. Fodor
Date: 06 Oct 1999
It is an undisputable fact that Ted Hall has divulged the implosion secrets which was in itself a fundamental invention of the Pu bomb design, as pointed out above. But, on the other hand, Klaus Fuchs has given Russians information how to handle plutonium as it is a metal with most unusual behaviour. R. Rhodes wrote in "Dark Sun": "Under some conditions, Pu can be nearly as hard and brittle as glass; under others, as soft and plastic as lead. It will burn and crumble quickly to powder when heated in air, or slowly disintegrate when kept at room temperature. It undergoes no less than 5 phase transitions between room temperature and its melting point....It is unique among all of the chemical elements." He continued: "Fuchs's revelations made it possible for Soviet scientists to approach the difficult business of plutonium fabrication well-informed. In particular, he reported importantly that the delta phase - the densest phase that is still malleable - could be stabilized at room temperature by alloying Pu with gallium."
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