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:
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


This page is currently not sponsored. Click here to sponsor this page.
(Fe3+,Fe2+,Mg)4((Si,Fe3+)6O15)(O,OH)2 · 6H2O
Crystal System:
Member of:
For Fe(III) (ferric iron) being the dominant cation and its relationship to sepiolite.
The Fe3+ analogue of sepiolite.

Hide all sections | Show all sections

Classification of FerrisepioliteHide

Approval Year:

9 : SILICATES (Germanates)
0 :
0 :

Chemical Properties of FerrisepioliteHide

(Fe3+,Fe2+,Mg)4((Si,Fe3+)6O15)(O,OH)2 · 6H2O
IMA Formula:
(Fe3+,Fe2+,Mg)4[(Si,Fe3+)6O15](O,OH)2 · 6H2O

Crystallography of FerrisepioliteHide

Crystal System:
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 13.467(16) Å, b = 26.953(41) Å, c = 5.226(17) Å
a:b:c = 0.5 : 1 : 0.194
Unit Cell V:
1,896.91 ų (Calculated from Unit Cell)
Space group Pncn.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
12.034 (100)
4.468 (5)
3.742 (6)
3.378 (31)
3.184 (4)
2.704 (6)
2.552 (5)
2.060 (4)

Type Occurrence of FerrisepioliteHide

Synonyms of FerrisepioliteHide

Other Language Names for FerrisepioliteHide

Simplified Chinese:铁海泡石

Relationship of Ferrisepiolite to other SpeciesHide

Member of:
Other Members of this group:
Falcondoite(Ni,Mg)4Si6O15(OH)2 · 6H2OOrth.
LoughliniteNa2Mg3Si6O16 · 8H2OOrth.
SepioliteMg4(Si6O15)(OH)2 · 6H2OOrth. mmm (2/m 2/m 2/m) : Pnna

Related Minerals - Nickel-Strunz GroupingHide

9.00.Clino-ferri-holmquistite⃞{Li2}{Mg3Fe3+2}(Si8O22)(OH)2Mon. 2/m : B2/m
9.00.AlflarseniteNaCa2Be3Si4O13(OH) · 2H2OMon. 2 : P21
9.00.YegoroviteNa4[Si4O8(OH)4] · 7H2OMon. 2/m : P21/b
9.00.FerroericssoniteBaFe2+2 Fe3+(Si2O7)O(OH) Mon. 2/m : B2/m
9.00.ZvyaginiteNaZnNb2Ti[Si2O7]20(OH,F)3(H2O)4 + (x < 1)Tric. 1 : P1
9.00.BurnettiteCaVAlSiO6Mon. 2/m : B2/b
9.00.MendigiteMn2Mn2MnCa(Si3O9)2Tric. 1 : P1

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for FerrisepioliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Xiangping Gu, Xiande Xie, Xiangbin Wu, Jianqing Lai, Hoshino Kenich, and Guchang Zhu (2010): Ferrisepiolite, IMA 2010-061. CNMNC Newsletter 7, 30; Mineralogical Magazine 75, 27-31.

Internet Links for FerrisepioliteHide

Localities for FerrisepioliteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Inner Mongolia
    • Baotou League (Baotou Prefecture)
      • Bayan Obo mining district
        • Bayan Obo
Qingchang Meng (1981): Geology and Prospecting 17(3), 10-17
  • Qinghai
    • Hainan
      • Xinghai Co.
Xiangping Gu, Xiande Xie, Xiangbin Wu, Jianqing Lai, Hoshino Kenich, and Guchang Zhu (2010): CNMNC Newsletter 7, 30
  • Murmansk Oblast
    • Lovozero Massif
      • Alluaiv Mt
Pavel M. Kartashov data
Nikita Chukanov analytical data
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. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: March 18, 2019 15:47:07 Page generated: December 30, 2018 12:00:37
Go to top of page