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Joosteite from
Helikon II pegmatite, Okongava Ost Farm 72, Karibib Constituency, Erongo Region, Namibia


Locality type:Mine
Classification
Species:Joosteite
Formula:Mn2+(Mn3+,Fe3+)(PO4)O
Comments:Associated minerals are lithiophilite, sicklerite, eosphorite, amblygonite, varulite, dickinsonite, hureaulite, apatite and unidentified Fe/Mn oxides. The mineral has been formed by alteration processes at the expense of pegmatitic lithiophilite. Joosteite exhibits a black lustre and occurs as irregular small aggregates up to 3 mm in length.
Luminescent properties:none
Quality for species:Poor for species, only of interest for locality collectors. (#)
Abundance at site:Rare
Confirmation
Validity:Confirmed - Type Locality
Confirmation Methods:EPMA
Associated Minerals:
Associates:Apatite
Dickinsonite-(KMnNa)
Eosphorite
Hureaulite
Lithiophilite
Sicklerite
Varulite
Data
Mineral Data:Click here to view Joosteite data
Locality Data:Click here to view Helikon II pegmatite, Okongava Ost Farm 72, Karibib Constituency, Erongo Region, Namibia
Data Identifiers
Mindat Occurrence Record ID:358458
Long-form Identifier:1:3:358458:3
GUID (UUID V4):0
References
Keller, Paul, Fontan, François, Roldan, Francisco Velasco, de Parseval, Philippe (2007) Joosteite, Mn2+(Mn3+, Fe3+)(PO4)O: a new phosphate mineral from the Helikon II Mine, Karibib, Namibia. Neues Jahrbuch für Mineralogie - Abhandlungen, 183 (2) 197-201 doi:10.1127/0077-7757/2007/0069
 
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