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Thanks for the offer and for the sodium offer. I'll keep that in mind and appreciate. Right now I'm swamped with re-running all my present samples on the Si-PIN. Say Steve, do you know Bruze? Geo>K0FF ----- Original Message ----- From: WILLIAM S Dubyk <sdubyk@...> To: [email protected] Sent: Mon, 10 Feb 2020 22:48:01 -0500 (EST) Subject: Re: [XRF] Brannerite! (or is it?) If you need a chunk or monazite, let me know, I've got plenty of it. From: [email protected] <[email protected]> on behalf of GEOelectronics@... <GEOelectronics@...> Sent: Monday, February 10, 2020 8:25 PM To: [email protected] <[email protected]> Subject: Re: [XRF] Brannerite! (or is it?) ? Cool Steve. I don't follow the fine details but get the idea. We appreciate your input. George? ----- Original Message ----- From: WILLIAM S Dubyk <sdubyk@...> To: [email protected] Sent: Mon, 10 Feb 2020 21:58:52 -0500 (EST) Subject: Re: [XRF] Brannerite! (or is it?) You are correct Geo, those are not very accurate. Charles ran a specimen of xenotime from Madagascar that I had in my collection for years, a rather expensive one. It may have been from Madagascar so that part may be correct, but the x-ray indicated it was likely monazite. Not happy about that but oh well. Yes, lots of thorium in the US, probably mostly as monazite, the Ce-Th phosphate. Thorium is almost always in the +4 state, whereas U is commonly in the +4 and +6 state. That indicates that U can also form oxidized minerals, but Th does not. So Th minerals commonly contain U, and unoxidized primary U minerals also contain Th. When you get to the oxidized +6 U minerals however, they are very pure U with virtually no Th. So if you want a good pure U standard, get an oxidized U mineral like meta autunite or something.? Steve From: [email protected] <[email protected]> on behalf of GEOelectronics@... <GEOelectronics@...> Sent: Monday, February 10, 2020 9:31 AM To: [email protected] <[email protected]> Subject: Re: [XRF] Brannerite! (or is it?) ? haha. I've heard stories about the voracity of those rock-shop labels.? Hey mineral guys, a question. How common is thorium in USA? Does it always come with U or is it also alone? Thanks Geo>K0FF ----- Original Message ----- From: Charles David Young <charlesdavidyoung@...> To: [email protected], Mike Loughlin <loughlin3@...> Sent: Mon, 10 Feb 2020 07:33:50 -0500 (EST) Subject: [XRF] Brannerite! (or is it?) I picked this up yesterday.? It was interesting because Brannerite UTi2O6 is supposed to be high in Ti and less so in Ta and Nb like betafites (Ca,Na,U)2(Ti, Nb,Ta)2O6Z(OH).? However, this specimen has much more Nb than anything else.? It is going back to the dealer today with this scan so he can label it correctly. Charles |
