Vote for your favorite mineral in #MinCup26! - Azurite vs. Smithsonite
It's carbonate-vs-carbonate to kick off Mineral Cup 2026 with copper-rich Azurite against zinc-rich Smithsonite.
Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
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 ElementsThe Rock H. Currier Digital LibraryGeologic TimeExplore Fossils
Minerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced 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 MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral QuizTime Machine
Photo SearchPhoto GalleriesSearch by ColorPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Polyhydrite

This page is currently not sponsored. Click here to sponsor this page.
An amorphous(?) aluminosilicate of Fe and minor Mn.
First reported from St Cristoph Mine, Breitenbrunn, Breitenbrunn District, Erzgebirge, Saxony, Germany.


Hide all sections | Show all sections

Unique IdentifiersHide

Mindat ID:
9405
Long-form identifier:
mindat:1:1:9405:0

Similar NamesHide

Classification of PolyhydriteHide

Strunz-mindat (2026):
9.HC.40

9 : SILICATES (Germanates)
H : Unclassified silicates
C : With Mn, Fe

Pronunciation of PolyhydriteHide

Pronunciation:
PlayRecorded byCountry
Jolyon RalphUnited Kingdom

Other Language Names for PolyhydriteHide

German:Polyhydrit
Spanish:Polyhydrita

Related Minerals - Strunz-mindat GroupingHide

9.HC.05Erlianite(Fe,Mg)4(Fe,V)2Si6O15(OH,O)8Orth.
9.HC.10BostwickiteCaMn3+6Si3O16 · 7H2OOrth.
9.HC.20'Almbosite'Fe2+5Fe3+4V6+4Si3O27
9.HC.25'Aquacreptite (of Shepard)'Mg4Fe2Si6O19 · 8H2O with some Al2O3, or near
9.HC.30'Farallonite'2MgO · W2O5 · SiO2 · nH2O?Mon.
9.HC.35'Hokoite'Mn2+Mn3+2SiO6 · H2O

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.

Internet Links for PolyhydriteHide

References for PolyhydriteHide

Reference List:
G. Starkl (1880)

Localities for PolyhydriteHide

Showing 1 localities.

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.
Hide all sections | Show all sections

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Germany
 
  • Saxony
    • Erzgebirgskreis
      • Breitenbrunn
        • Breitenbrunn
Quick NavTopUnique IdentifiersSimilar NamesClassification Pronunciation Other LanguagesStrunz-MindatOther InformationInternet Links References Localities Locality List
 
and/or  
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 1, 2026 11:50:33 Page updated: July 23, 2026 14:54:46
Go to top of page