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This is a cyrtolite from Branchville Quarry, CT. It has less of Fe, Hf, Th, and Y than the previous cyrtolites. It has more U. This is consistent with my gamma spec that I previously attached showing

Here is the addition of the Burnet County, TX cyrtolite: https://www.mindat.org/photo-960152.html Charles charlesdavidyoung@...> wrote:

Attached are the scans of both cyrtolites from South Platte. The latest also has the id of thorite. https://www.mindat.org/photo-962592.html https://www.mindat.org/photo-984187.html So is it fair to

Thanks, Steve! Hm, what is impressive? I have some 99% zirconium. Is that what you mean by a standard? Charles

Charles, you should have it QA'ed by someone else, but wow, that is impressive. Do you have a zirconium standard? I've got a zirconium disc if you need one. Steve ________________________________

Ok, here are the final files. I'll start the other South Platte cyrtolite now. Charles

Lookin’ good Dud Sent: Tuesday, January 21, 2020 3:49 PM To: [email protected] Subject: Re: [XRF] cyrtolite Little Patsy XRF I am still running this scan but the element list is now: Fe Hf Y Zr I have

I am still running this scan but the element list is now: Fe Hf Y Zr I have also included an intermediate .mca file. BTW my gamma scans show this is a combination of U238 and Th232 decay chains. I

And this is the rock. https://www.mindat.org/photo-962592.html charlesdavidyoung@...> wrote:

It is still early but here are some of the strongest peaks: Fe Y Zr I'll send the .mca later when I have some decent counts. Charles

Well, we know that the Au is coming from Am241 source.

Charles, This is pretty messy and really provides not a lot of information due to interferences and low count. I would suggest you get a piece of known composition steel (SS 316 would be niece) or

Steve, do you have the xrf data of this from Virgil? Dud Sent: Monday, January 20, 2020 9:35 PM To: [email protected] Subject: Re: [XRF] XRF - comparing Dud's with my Si-PIN Charles, take a look at this.

Steve, I'll XRF cyrtolites next. You know what I have so you want me to start with South Platte? Meanwhile, what do you think about the White Signal XRF? Is that what you expect bassetite to look

Charles, take a look at this. This was identified by xrf by Virgil Leuth at NM Tech; you could not have guessed this is zircon. Mel took this in because it was very odd looking. So xrf looks like a

If you can see the Zr with the Am buttons, you can always see the Th with gamma spec. That would help define the mineral assemblage. That in itself would be pretty neat! Can you identify Zr with your

Well I don't have a beam, just Am241 buttons. So I guess that will have to wait until I get a real x-ray source. El El lun, ene. 20, 2020 a la(s) 9:19 p. m., WILLIAM S Dubyk <sdubyk@...>

You would have to get the tightest beam focus possible then zap the mineral from a variety of angles. Try that and see what you get, that might be interesting. ________________________________ Sent:

So would I be able to see anything one way or another with my Si-PIN? El El lun, ene. 20, 2020 a la(s) 9:06 p. m., WILLIAM S Dubyk <sdubyk@...> escribió:

I'm sure they are Charles, for sure the ones from the South Platte peg area, those are probably intergrown with thorite, both are tetragonal and exsolve after a certain point. But it is hard to find