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
42870
MineralsStannoan Grossular
5th Jul 2012 12:50 UTCAlfredo Petrov Manager
5th Jul 2012 13:46 UTCJolyon Ralph Founder
5th Jul 2012 13:50 UTCAlfredo Petrov Manager
If it is indeed only present as inclusions, then it shouldn't be in the formula at all.
If the Sn is structural, then I guess garnets would compensate the charge as they do for Ti: It would be in the second formula position, replacing Al, not Ca, with charge compensated either by a divalent metal in the same position, or by trivalent Fe or Al replacing Si. But that's just my guess.
As we do not know, it would perhaps be best to just erase the formula entirely?
5th Jul 2012 15:56 UTCDavid Von Bargen Manager
http://www.minersoc.org/pages/Archive-MM/Volume_42/42-324-427.pdf
They didn't see any inclusions of cassiterite in their thin sections.
5th Jul 2012 20:05 UTCBart Cannon
There is one 20 miles East of Sun Valley, Idaho. I don't think tin was the target element of the prospect, but rather copper and silver.
I collected it many years ago, but could not determine the host for the tin, the reason I visited the property.
The source of the tin was NOT cassiterite.
Diopside was prominent. Would that be a better mineral to contaminate the structure with tin than grossular or andradite ?
If I recall correctly, beryllium was also a prominent trace element.
5th Jul 2012 20:16 UTCAlfredo Petrov Manager
5th Jul 2012 23:39 UTCDavid Von Bargen Manager
http://www.minersoc.org/pages/Archive-MM/Volume_42/42-324-487.pdf
6th Jul 2012 15:41 UTCLefteris Rantos Expert
Also, Sn-bearing Andradites are known from non-slag localities too. See http://www.mindat.org/loc-2388.html and http://www.mindat.org/photo-473126.html
Lefteris.
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 22:13:42
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 22:13:42