19 Nov
2009
19 Nov
'09
11:17 p.m.
On Tue, Nov 17, 2009 at 8:24 PM, William Donzelli <wdonzelli at gmail.com> wrote:
The Helium3 they use for microKelvin heatpumps for radio telescopes is
pretty pricey by the gram, but I don't remember the exact cost - it is
in the thousands-per-gram range, though.
-ethan
I just
remembered. ?It's rhenium. ?$6000-*mumble* per ounce.
The most expensive thing I can think of is Boron - specifically the
purified B10 isotope. I once had a pair of ancient neutron detector
probes, with the inner surfaces coated with the stuff. The price makes
gold look like dog food - $10K per gram, roughly.