SUPPORT US. Covid-19 has significantly affected our fundraising. Please help!
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:
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral Quiz
Photo SearchPhoto GalleriesSearch by ColorNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryMineral Photography


This page is currently not sponsored. Click here to sponsor this page.
Hide all sections | Show all sections

About FerrisepioliteHide

(Fe3+,Fe2+,Mg)4((Si,Fe3+)6O15)(O,OH)2 · 6H2O
Brown to red-brown
2 - 2½
Specific Gravity:
2.51 - 2.69
Crystal System:
Member of:
For Fe(III) (ferric iron) being the dominant cation and its relationship to sepiolite.
The Fe3+ analogue of sepiolite.

Classification of FerrisepioliteHide

Approval year:
First published:

9 : SILICATES (Germanates)
0 :
0 :

Physical Properties of FerrisepioliteHide

Brown to red-brown
2 - 2½ on Mohs scale
2.51 - 2.69 g/cm3 (Measured)    

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 Å(100)
4.468 Å(5)
3.742 Å(6)
3.378 Å(31)
3.184 Å(4)
2.704 Å(6)
2.552 Å(5)
2.060 Å(4)

Type Occurrence of FerrisepioliteHide

General Appearance of Type Material:
Brown earthy and fibrous aggregates with an appearance of wood bark, consisting of fibrous crystals several micrometers wide and several centimeters long. Also as brown earthy mass consisting of individual grains of flaky-acicular microlites with poor cry
Place of Conservation of Type Material:
Geological Museum of China with catalog number M11786.
Geological Setting of Type Material:
Late-stage veinlets in copper-sulphide ores hosted in layered hedenbergite-andradite-actinolite skarn. Highly oxidizing environment from low-temperature Fe-rich fluids and crystallized in cavities and fractures within the skarn-ore deposit.
Associated Minerals at Type Locality:
Gu, X., Xie, X., Wu, X., Zhu, G., Lai, J., Hoshino, K., Huang, J. (2013) Ferrisepiolite: a new mineral from Saishitang copper skarn deposit in Xinghai County, Qinghai Province, China. European Journal of Mineralogy: 25(2): 177–186.

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-holmquistite◻{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

Do not dissolve in dilute hydrochloric acid.
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.
Gu, X., Xie, X., Wu, X., Zhu, G., Lai, J., Hoshino, K., Huang, J. (2013) Ferrisepiolite: a new mineral from Saishitang copper skarn deposit in Xinghai County, Qinghai Province, China. European Journal of Mineralogy: 25(2): 177–186.

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 City (Baotou Prefecture)
      • Bayan Obo mining district
        • Bayan Obo
Qingchang Meng (1981): Geology and Prospecting 17(3), 10-17
  • Qinghai
    • Hainan
      • Xinghai County
Xiangping Gu, Xiande Xie, Xiangbin Wu, Jianqing Lai, Hoshino Kenich, and Guchang Zhu (2010): CNMNC Newsletter 7, 30
  • Campania
    • Naples
      • Somma-Vesuvius Complex
        • Monte Somma
          • Ercolano
            • San Vito
Imma Punzo find & collection
  • Murmansk Oblast
    • Lovozersky District
      • Alluaiv Mountain
Pavel M. Kartashov data
Nikita Chukanov analytical data
  • Prešov Region
    • Vranov nad Topľou District
      • Vechec
Ďuďa, R., Scharmová M., Černý, P. (1993): Minerály xenolitov z Vechca (Slanské vrchy). Zborník Východoslov. múzea v Košiciach, Prírodné vedy 34, 17-29 (in Slovak).
Mineral and/or Locality  
Mindat Discussions Facebook Logo Instagram Logo Discord Logo is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © and the Hudson Institute of Mineralogy 1993-2021, except where stated. Most political location boundaries are © OpenStreetMap contributors. relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us - Report a bug/vulnerability Current server date and time: April 19, 2021 21:04:38 Page generated: March 7, 2021 14:14:54
Go to top of page