General EPMA > EPMA Standard Materials
Standards DATABASE!?!?
Probeman:
--- Quote from: crystalgrower on June 30, 2018, 09:07:55 AM ---SPI began selling RP5O14 standards for all REE+Y in 2000. The wholesale price for these from China was a little on the high side. The supply was unreliable after about 2005.
Astimex released my homegrown RP5O14 and other products in 2010. The price was dropped and the crystals were at least 20X larger than the China source. I have most of the validation paperwork on file.
ALL; OF THESE RP5O14 were produced completely free of Pb and all other matrix and flux contaminants.
So here we are in mid-2018 and the only "public" supply is the ORNL sourced RPO4 as distributed by the Smithsonian, with gross and variable contamination of Pb in La-Gd???
What am I missing here--the secret blacklist of Astimex and SPI? Because their websites have been updated as soon as anything was released for sale.
--- End quote ---
Yes, I agree 100%.
As the one who first documented the Pb contamination in the ORNL material distributed by the Smithsonian, I find it surprising that you say people aren't buying the Astimex Pb free REE phosphates.
http://epmalab.uoregon.edu/publ/Cand%20Min%20Pb%20in%20REE.pdf
Are labs that poor that they would prefer free contaminated material, to inexpensive uncontaminated material?
Please feel free to post links to the Astimex REE phosphate material. More people should be utilizing this very nice material.
crystalgrower:
--- Quote from: Probeman on June 30, 2018, 09:21:10 AM ---Yes, I agree 100%.
As the one who first documented the Pb contamination in the ORNL material distributed by the Smithsonian, I find it surprising that you say people aren't buying the Astimex Pb free REE phosphates.
http://epmalab.uoregon.edu/publ/Cand%20Min%20Pb%20in%20REE.pdf
Are labs that poor that they would prefer free contaminated material, to inexpensive uncontaminated material?
Please feel free to post links to the Astimex REE phosphate material. More people should be utilizing this very nice material.
--- End quote ---
Please see new thread rare earth ultraphosphates. I have no idea what Astimex prices are.
crystalgrower:
May I urge all users to make themselves an archive of the original SPI DYOS pages because these contain the most useful information and graphics.
https://www.2spi.com/catalog/standards/aweb/ gets you to search-by-element or search through lists by type.
The new pages are still being created. Don't get caught short.
If the link doesn't get you there then search for "dyos" in the homepage and in the results, link to the photo of the mount. That page has a second link to the old database.
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