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Improving Mindat.orgStrelkinite?
16th Apr 2017 23:47 UTCReiner Mielke Expert
17th Apr 2017 00:54 UTCPavel Kartashov Manager
17th Apr 2017 01:38 UTCReiner Mielke Expert
Like I have stated before the system does detect Na, for example:
and :
and:
I could go on as I have about 50 analysis with Na but I think I have made my point.
17th Apr 2017 06:57 UTCŁukasz Kruszewski Expert
17th Apr 2017 13:46 UTCPavel Kartashov Manager
so you had prove only the fact, that strelkinite is absent in your samples. But, of course, presence of such rare species in samples should to be confirmed by some method and you quite may be right in case of mentioned photo. My strelkinite from M. Murashko looks some different (not so nice as at the photo).
When I speak about sensitivity, I mean such spectra
I haven't under hands of strelkinite spectrum, but this is metanatroautunite one
17th Apr 2017 14:10 UTCReiner Mielke Expert
"so you had prove only the fact, that strelkinite is absent in your samples." exactly my point. In otherwords what I was saying is that without analysis one cannot say it is strelkinite as it could be tyuyamunite so the photos posted are questionable and could mislead people into thinking their tyuyamunite samples are strelkinite. As for my sample being tyuyamunite, you are correct, the analysis are not good enough to confirm that. I just assumed it was metatyuyamunite since the only two U,V minerals found at that locality are strelkinite and metatyuyamunite https://www.mindat.org/loc-31332.html
17th Apr 2017 16:33 UTCPavel Kartashov Manager
17th Apr 2017 18:23 UTCTravis Olds Expert
But I agree with Pavel, intergrowth between uranyl vanadates is incredibly common. For example we've recently found Sr-dominant francevillite group xls growing intimately on carnotite.
Travis
17th Apr 2017 19:15 UTCŁukasz Kruszewski Expert
21st Apr 2017 09:48 UTCCarsten Slotta 🌟 Expert
this find has been properly analyzed by Dr. Murashko. As mentioned by Pavel the chemistry of these uranium micas can differ
from crystal to crystal, so if you would take xls from different spots of the sample and analyze them I assume you will get different
results. Just because you have found no Na in your particular crystal it doesn’t necessarily mean it can’t be elsewhere on the
specimen.
21st Apr 2017 13:47 UTCReiner Mielke Expert
This may be correct but that fact should be stated in the descriptions as this situation does not hold true for all species from that group.
21st Apr 2017 16:39 UTCJoy Desor Expert
Cheers
21st Apr 2017 18:28 UTCCarsten Slotta 🌟 Expert
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Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2024, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: April 25, 2024 13:53:53