SUPPORT US. If mindat.org is important to you, click here to donate to our Fall 2019 fundraiser!
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

GeneralData on composition of siderite from different localities

2nd Oct 2019 06:35 BSTIvan Novoselov

I am rsearcher in a laboratory of experimental minerlogy, and now I'm doing works connected with carbonates of calcite and dolomite groups behavior under the Earth's mantle's conditions.
During the search of materials I faced an unexpected problem: it turned out that more or less pure siderite is really hard to find. Three samples I ow (from Saint-Pierre-de-Mesge, Bakalskoe and Mangazeyskoe deposits) happened to be magnesiosiderite with content of magnesian component of 35, 27 and 29 % respectively, and separating siderite from Mangazeyskoe from limonites was such a pain.
I also didn't succeed in finding pure synthetic iron carbonate. The most of organisations selling chemical reagents sell techical FeCO3 (about 80% of purity), and a few others, who can sell really pure one, work only with cards of USA banks (wich i don't have). 
 In articles about deposits, samples from where I could get, there is no information about siderite composition, and sellers never dispose any chemical analysis data. Buying all samples that are availble and analyzing them doesn't look like a reasonable strategy, so I ask your help.
I would be grateful if you share with me your datas on composition of siderite from different localities, especially from Panasqueira, Quebec, Rudnany (Slovennia), Saxony and  Inner Mongolia. I understand that even samples from one mine can have heterogenious compositions, but any information will help. 

3rd Oct 2019 07:04 BSTFrank K. Mazdab Manager

Hi Ivan,

here are my own data for siderite from the Ivigtut, Greenland cryolite deposit.  Additional information on the associated minerals and their compositions in this sample are on my website at:

FeO     59.30
MnO    2.01
NiO      0.01
ZnO     0.03
MgO    0.08
CO2    [37.69] calculated based on stoichiometry (assigning C = 1.00 apfu)

If you can find large Greenland cryolite masses for sale (they're a bit less commonly available than they used to be, as I think the mine is now closed), they will almost certainly contain large crystals and cleavages of this siderite.  The siderite is partially oxidized to an Fe (III) oxyhydroxide along cracks and cleavages, so be mindful of that if you use it as a bulk material for experiments.

3rd Oct 2019 09:46 BSTIvan Novoselov

Thank you a lot, it's very useful information!

3rd Oct 2019 14:15 BSTLászló Horváth Manager

Two electron-microprobe analyses carried outby T.S. Ercit (Mandarino & Anderson 1989)gave, as an average, MgO 3.56, CaO 0.17, MnO8.25, FeO 48.97, CO2 39.40, total 100.35 wt.%.The amount of CO2 was determined by TGA(R. Ramik, ROM). The resulting empiricalformula is (Fe0.76Mn0.13Mg0.10)Σ0.99CO3. Calciumis considered to be a trace element here. Anotheranalysis of close-to-end-member siderite by Schilling et al. (2011b) gave MgO 0.65, CaO 1.12,MnO 2.04, FeO 57.41, Ce2O3 0.03, Y2O3 0.08, CO2 38.04, total 100.35 wt.%.
The amount of CO2was determined by stoichiometry.


Mandarino, J.A. & Anderson, V. (1989): Monteregian Treasures: the Minerals of Mont Saint-Hilaire,Quebec. Cambridge University Press, New York, N.Y.

Schilling, J., Marks, M.A.W., Wenzel, T., Vennemann, T., Horváth, L., Tarassoff, P., Jacob, D.E. &Markl, G. (2011b): The magmatic to hydrothermal evolution of the intrusive Mont SaintHilaire complex: insights into the late-stage evolution of peralkaline rocks. Journal ofPetrology 52, 2147-2185.
The two analyses and references shown above are for Mont Saint-Hilaire siderite.

9th Oct 2019 04:43 BSTIvan Novoselov

Thank you, that information really helped too

9th Oct 2019 16:44 BSTTony Nikischer Manager

You can also find multiple analyses of siderite from a  variety of localities  in the second edition of Deer, Howie & Zussman, Vol. 5B, Rock Forming Minerals, Non-Silicates.

15th Oct 2019 23:41 BSTEmil Box

Also Doelter (1929) has 77 Siderite-Analyses, in german.
Grts.
Milo
 
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 1993-2019, 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: October 16, 2019 11:19:23
Go to top of page