Group 18 elements historical significance

The historic use of trace-element geochemistry around the McArthur River Uranium Deposit has primarily focussed on a limited suite of elements, including uranium, lead, nickel, copper, and boron. At McArthur River, uranium is distributed around the main deposit to significant distances (100 s of meters) in the overlying Athabasca Group (McGill et al. 1993), yet variations in the uranium content of this halo is typically restricted to 1-3 parts per million with little spatial variation, restricting one s ability to vector... 

Nearly 50 years have passed since the discovery that group 14 elements can adopt framework stmctures isotypic with the clathrate hydrates [1-3], the historical context of which is discussed in Chap. 1 of this volume. Given their significant chemical differences, it is intriguing that both water molecules and main group... 

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