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 ArticlesThe ElementsBooks & Magazines
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 CompaniesStatisticsUsersMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryMineral Photography

The Mines and Minerals of Lavrion - Amarantite

Last Updated: 21st Mar 2020

By Branko Rieck

AMARANTITE, Fe3+2(SO4)2O · 7H2O, triclinic



General Appearance
In a so far rather unnoticed area at the 4th Level of the Hilarion area, a highly interesting paragenesis of sulfate minerals was discovered in fall 2013 (Rieck et al., 2018). There are quite a few similarities with the sulfate localities in Plaka and Sounion, however also marked differences may be observed. This leads to a slightly different mineralization and consequently new discoveries for Lavrion. On a single piece, picked up at the floor of the adit, amarantite forms radial aggregates in matrix. The color, an intense orange-brown, and the cleavage are distinct (see Figure 1). The individual, stout crystals tend to split into fine, individual fibers at the crystal terminations.

Paragenesis
The matrix consists of gypsum, melanterite and kröhnkite. Amarantite fibers in some parts quite often grade into pseudomorphs of copiapite after amarantite, containing also fibroferrite, hohmannite and/or metahohmannite.

Localities
As of March 2020 amarantite is a single-locality mineral at the Lavrion Mining District. The spot where it has been found is a small side adit at the 4th level of the Hilarion Mine. At this place a number of sulfate-rich secondary minerals have been found.


06217890015833061833490.jpg
Fig. 1: Orange-brown, radiating aggregates of amarantite in a matrix of melanterite (green), kröhnkite (blue) and gypsum (colorless, partly colored yellow from inclusions of hohmannite/metahohmannite). From the 4th level of the Hilarion area. FOV: 6 mm.





Acknowledgements
Thanks go to Dr. Uwe Kolitsch for constructive comments and diligent proofreading to improve this article.

References
Rieck, B., Kolitsch, U., Voudouris, P., Giester, G. and Tzeferis, P. (2018): Weitere Neufunde aus Lavrion, Griechenland. Mineralien-Welt 29 (5), 32-77 (in German).




Article has been viewed at least 594 times.
 
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2020, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: April 9, 2020 02:44:06
Go to top of page