On that one shown, yes there is uranium, but not enough to notice by XRF compared to the huge niobium content.? Enough to make the Geiger counter (pancake probe) go nut but not enough to analyze with the GR-135.
Fine on the pictures of your lab, so THAT's what was in all those storage bins in LV!! Nice looking stuff. WIsh my mess looked that organized.....
Geo
----- Original Message -----
From: Dude <dfemer@...>
To:
[email protected]Sent: Sun, 03 Nov 2019 16:14:53 -0500 (EST)
Subject: Re: [XRF] OK Dude, how do we excite those RE's above 50 keV cleanly and how to detect it.
Hmm no U or Th?? Not a lot of Nb. This would be a good Ta Coltan
ore if the T is 30%
Dud
?
?
Here's one from the Petaca District showing Nb plus definite
Ta. It was labeled as Columbite-Tantalite, by the collector.Nb K's 16.61/
18.62, while the dark blue ones to the left are Ta Ls 8.15/9.34.
Geo
