Log InRegister
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreOur ScienceMindat Newsletter [Free Download]Contact Us
Donate to MindatSponsor a PageCorporate SponsorshipSponsored Pages
Learning CenterWhat Is a Mineral?The Most Common Minerals on EarthInformation for EducatorsMindat ArticlesMindat Newsletter [Free Download]The ElementsThe Mineral Quiz
Minerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDMinerals by CountryAlphabetical Mineral IndexAlphabetical Locality SearchMineral Association SearchList of CountriesLocalities Near MePhoto SearchSearch ArticlesSearch GlossaryThe Rock H. Currier Digital LibraryMore Search Options
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
MineralsPetrologyFossilsMeteoritesGeologic Time
Mining CompaniesStatisticsMineral MuseumsClubs & OrganizationsMineral Shows & EventsDevice SettingsTime Machine
Read DiscussionsIdentification Request
Photo SearchPhoto GalleriesSearch by ColourPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Lapparentite (of Rost)

This page is currently not sponsored. Click here to sponsor this page.
Formula:
Al2(SO4)2(OH)2 Ā· 9H2O ?
Colour:
White
Lustre:
Dull
Specific Gravity:
1.892
Occurs as chalky white masses. See Aluminite for comparison.


Hide all sections | Show all sections

Unique IdentifiersHide

Mindat ID:
31763
Long-form identifier:
mindat:1:1:31763:2

Similar NamesHide

LapparentiteA synonym of RostiteAl(SO4)(OH) · 5H2O

Physical Properties of Lapparentite (of Rost)Hide

Lustre:
Dull
Transparency:
Opaque
Colour:
White
Density:
1.892 g/cm3 (Measured)    

Optical Data of Lapparentite (of Rost)Hide

Type:
Biaxial (+)

Chemistry of Lapparentite (of Rost)Hide

Mindat Formula:
Al2(SO4)2(OH)2 Ā· 9H2O ?
Element Weights:
Element% weight
O68.738 %
S14.501 %
Al12.202 %
H4.558 %

Calculated from ideal end-member formula.
Elements listed:
Al, H, O, S - search for minerals with similar chemistry

Crystallography of Lapparentite (of Rost)Hide

Morphology:
Crystals are rhomboidal tablets with internal angles of 82Ā° and 98Ā°.

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 Lapparentite (of Rost)Hide

References for Lapparentite (of Rost)Hide

Localities for Lapparentite (of Rost)Hide

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. ā“˜ - 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.
Czech Republic
 
  • Central Bohemian Region
    • Kladno District
      • LibuÅ”in
Palache et al. (1951)
Quick NavTopUnique IdentifiersSimilar NamesPhysical Properties Optical Data Chemistry Crystallography Other InformationInternet Links References Localities Locality List
 
and/or  
Mindat.orgĀ® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. MindatĀ® and mindat.orgĀ® 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 Ā© 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), 833ā€“844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: October 14, 2026 06:50:20 Page updated: January 1, 2026 17:36:33
Go to top of page