Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic Time
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral Quiz
Photo SearchPhoto GalleriesSearch by ColorNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography
╳Discussions
💬 Home🔎 Search📅 LatestGroups
EducationOpen discussion area.Fakes & FraudsOpen discussion area.Field CollectingOpen discussion area.FossilsOpen discussion area.Gems and GemologyOpen discussion area.GeneralOpen discussion area.How to ContributeOpen discussion area.Identity HelpOpen discussion area.Improving Mindat.orgOpen discussion area.LocalitiesOpen discussion area.Lost and Stolen SpecimensOpen discussion area.MarketplaceOpen discussion area.MeteoritesOpen discussion area.Mindat ProductsOpen discussion area.Mineral ExchangesOpen discussion area.Mineral PhotographyOpen discussion area.Mineral ShowsOpen discussion area.Mineralogical ClassificationOpen discussion area.Mineralogy CourseOpen discussion area.MineralsOpen discussion area.Minerals and MuseumsOpen discussion area.PhotosOpen discussion area.Techniques for CollectorsOpen discussion area.The Rock H. Currier Digital LibraryOpen discussion area.UV MineralsOpen discussion area.Recent Images in Discussions
Improving Mindat.orgwrong formula for Owyheeite
26th Sep 2009 19:03 UTCJean-Francois Carpentier Expert
26th Sep 2009 20:37 UTCMarco E. Ciriotti Manager
27th Sep 2009 17:49 UTCRob Woodside 🌟 Manager
Thanks for the kind endorsement on the Italian Type Minerals Book. The book is so interesting I didn't notice the photo on the front cover. Tubes of a Silver, Iron bearing Lead Antimony sulfide. Without knowing the % of each, it sounds like a Silver bearing Jamesonite. I have never heard of that. However at Van Silver we found Boulangerite tubes that were identified by Don Howard with his electron probe.
I busted my head trying to figure out some optical reason; diffraction, refraction, interference, camera effect, etc. for the red centres in these tubes. Sadly to no avail. Now your front cover suggests a silver mineral that makes tubes. It's easy to miss the tiny amount of Iron in Jamesonite and not much silver is required for a sulfosalt to transmit red light. That could be the answer to the red inside the tube!!! So I wonder if our "Boulangerite" is your new unknown mineral. We still have examples of these tubes from Van Silver. Would the people working on this new mineral be interested in examples for analysis???.
27th Sep 2009 18:05 UTCMarco E. Ciriotti Manager
Studies of the phase are current (Yves Moelo).
I will send the paper. Ciao.
Marco
27th Sep 2009 19:44 UTCUwe Kolitsch Manager
3rd Oct 2009 17:04 UTCJean-Francois Carpentier Expert
there is still a typo; this is not S18 but S28; sorry for bothering but let's try to get it right.
jean-Francois
3rd Oct 2009 17:07 UTCRob Woodside 🌟 Manager
4th Oct 2009 19:38 UTCUwe Kolitsch Manager
12th Jul 2012 15:14 UTCGeorges Favreau Manager
Could your mineral from Van Silver be tubulite?
It would be fun to find a third locality, just after approval of the mineral.
Best regards,
Georges.
12th Jul 2012 16:10 UTCAlfredo Petrov Manager
12th Jul 2012 21:04 UTCRob Woodside 🌟 Manager
Can anyone send me the Tubulite paper ( Mineralogical Magazine, 76, 807-817)?
I wonder if Tubulite shows the same "red-eye" as the Van Silver tubes? I'll bet it could be eliminated with the photo aps that remove red-eye from people photos. The tubulites in our Gallery don't show "red-eye".
The SEM image of the Van Silver tubes in the 2000 article was taken by Don Howard and he identified Boulangerite. Presumably Parasterryite was the tube on the cover of the Italian Type Mineral book. I sent Prof. Moello one of the Van Silver tubes associated with Fizelyite and he replied that it was Owyheeite!!! Currently I'm lost somewhere between home renos and Afghanistan, and have been meaning to check my few owyheeites for transmission of red light. Has anyone noted this in Owyheeite? Usually Owyheeites are tiny flat lying xls that are hard to back light. Amusingly the Van Silver tetrahedrites show red lights, similar to Binnite, and that's the only red transmitting tetrahedrite I've ever seen, apart from the tennantite variety Binnite. So red transmission is probably not diagnostic, depending on thickness, impurities, and light intensity.
Curiouser and curiouser!!!
13th Jul 2012 10:23 UTCBart Cannon
They show such intricate exsolution and intricate intergrowths that I doubt there are many truly good analysis since the x-ray lateral resolution of the beam will almost always suffer from beam overlap on at least two phases, and produce a hybrid analysis.
Probably the same with XRD.
There is no practical "nano" in conventional mineralogical analysis.
The intergrowths of these minerals are more complex than a Jackson Pollock painting, but at least with a proper color chart you can determine what was on his palette.
Bart
13th Jul 2012 10:42 UTCBart Cannon
A scanning transmission electron microscope (STEM) and under some conditions, a high resolution transmission electron microscope (TEM) equipped with an x-ray spectrometer can image at the atomic level and provide x-ray spectra of the following layers in the lillianite species..
The acanthite layer, the bismuthinite layer, and the galena layers can be confirmed.
The analyses, however, are not easy to obtain by the common probe man. So not really practical.
I pretty much just like quartz, and galena. Too much solid solution in calcite and it's hard to discern marcasite from pyrite, wurtzite from sphalerite, and calcite from aragonite with the electron probe.
So if you want me to identify quartz or galena, I'm your probe lab. Oh. Darn. I don't think I can distinguish opal from quartz unless I I use my visual light optics in the probe to observe cathodoluminescense colors. I'm not sure if opal shows cathodoluminescence. I'll check.
Bart
13th Jul 2012 19:05 UTCRob Woodside 🌟 Manager
Elsewhere Frank de Witt reports:
"In the Lengenbach quarry it was traces of Tl which caused the red internal reflections of non-Tl sulfosalts. Just after moving the old quarry upwards (from Lengenbach-I to Lengenbach-II) there was an increase in As-richer and Tl-rich minerals. At that time I was very active there and suddenly all "normal" sulfosalts seemed to have red internal reflections. This was not funny, it caused a lot of mental problems for the normal human beings without SEM-EDS :-)"
Rather than living on Mindat, I must look at my Owyheeite to see if they have red transmissions. Anyone else found any?
Red lights in Tubulite?
13th Jul 2012 19:28 UTCRob Woodside 🌟 Manager
11th Nov 2012 18:42 UTCLefteris Rantos Expert
Lefteris.
3rd Dec 2012 09:00 UTCLefteris Rantos Expert
Maybe these deserve a new analysis, in view of the recent description of Tubulite?
edit: should read "recent approval"
Lefteris.
3rd Dec 2012 12:55 UTCMarco E. Ciriotti Manager
-------------------------------------------------------
>
> Maybe these deserve a new analysis, in view of the
> recent description of Tubulite?
>
> Lefteris.
Perhaps... the two phases are correlated but not so similar.
Description-type of tubulite is in progress.
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
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 17:39:10
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 17:39:10