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
Search FormMinerals 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

Sigismundite from
Buranga pegmatite, Muhororo, Ngororero District, Western Province, Rwanda


Locality type:Pegmatite
Classification
Species:Sigismundite
Formula:(Ba◻)(Fe2+◻)Ca(Na2◻)Fe132+Al(PO4)11(PO3OH)(OH)2
Chemical Analyses:
Oxide wt%:
1
P2O539.34 %
Al2O31.96 %
Fe2O31.34 %
FeO19.36 %
MgO2.80 %
MnO19.45 %
CaO2.28 %
BaO5.36 %
Na2O4.97 %
K2O0.63 %
LiO0.20 %
H2O+1.45 %
H2O-0.10 %
F0.47 %
Total:99.71 %
Sample references:
1 -
von Knorring, O. (1969) A note on the phosphate mineralisation at the Buranga pegmatite, Rwanda. Bulletin du Service Geologique de la Republique du Rwanda: 5: 42-45.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Sigismundite data
Locality Data:Click here to view Buranga pegmatite, Muhororo, Ngororero District, Western Province, Rwanda
Data Identifiers
Mindat Occurrence Record ID:831536
Long-form Identifier:1:3:831536:6
GUID (UUID V4):0
References
von Knorring, O. (1969) A note on the phosphate mineralisation at the Buranga pegmatite, Rwanda. Bulletin du Service Geologique de la Republique du Rwanda: 5: 42-45.
Daltry, V.D.C., von Knorring, O. (1998) Type-mineralogy of Rwanda with particular reference to the Buranga pegmatite. Geologica Belgica: 1: 9-15. https://popups.uliege.be/1374-8505/index.php?id=1593
Chopin, Christian, Oberti, Roberta, CÃĄmara, Fernando (2006) The arrojadite enigma: II. Compositional space, new members, and nomenclature of the group. American Mineralogist, 91 (8). 1260-1270 doi:10.2138/am.2006.2190
 
and/or  
Mindat.orgÂŪ is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. MindatÂŪ and mindat.orgÂŪ 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 ÂĐ 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: October 19, 2026 07:32:56
Go to top of page