IMPORTANT MESSAGE. We need your support now to keep mindat.org running. Click here to find out why.
Log InRegister
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 Articles
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery
bannerbannerbannerbannerbannerbanner

Michenerite?

Posted by Reiner Mielke  
avatar
Reiner Mielke January 29, 2017 02:14AM
https://www.mindat.org/photo-700339.html this is not michenerite. Michenerite is not blue. This is simply some tarnished grains of the mineral around it which to me looks like chalcopyrite. Also I have found when michenerite is in chalcopyrite it forms distinct blebs with sharp contacts not like this.



Edited 1 time(s). Last edit at 01/29/2017 02:18AM by Reiner Mielke.
avatar
Łukasz Kruszewski January 29, 2017 10:04AM
I have a specimen sold as "michenerite" from this locality... also no Pd or Te.....
avatar
Joachim Esche February 03, 2017 12:33PM
Hello Reiner,
last night I checked this specimen. Forget the blueish colour, this is probably a lightning artefact. The colour is pure silver (under LED-light and normal bulb light). Only one blue spot is visible (not in the foto). I think this is a remaining from cracking the sample.
But anyway, I will give this sample to a friend for an EDX-check. The Sid Williams analyses are sometimes a little bit untrustworthy.
Be patient
Joachim
avatar
Reiner Mielke February 03, 2017 12:54PM
Thank you Joachim.
avatar
Uwe Kolitsch August 28, 2017 12:41PM
EDS analysis demonstrated it's a Pt-Bi-sulphide with minor Fe (no Te detectable). Joachim will show me the specimen in September and then we will see if XRD and/or EPMA can be done.

EDIT: Had changed it to "Unidentified mineral".



Edited 1 time(s). Last edit at 08/28/2017 12:42PM by Uwe Kolitsch.
avatar
Uwe Kolitsch November 09, 2017 01:01PM
New EDS analysis by Dan Topa on the aggregate (very soft, flexible, poor polishing), shows this is simple molydenite!
(The original EDS analysis was done in Switzerland.)

Either there was some severe case of wishful thinking or some illegal mislabeling by a dealer...

Will correct photo.
Sorry, only registered users may post in this forum.

Click here to login



bannerbannerbannerbannerbannerbanner
Mineral and/or Locality  
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 1993-2018, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: November 21, 2018 14:10:49
Go to top of page