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Poldervaartite from
N'Chwaning II Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa


03324050017365570462497.jpg
Poldervaartite, etc.

N'Chwaning II Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
07072880017271987143833.jpg
Poldervaartite, etc.

N'Chwaning II Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
00807550017370752856594.jpg
Poldervaartite, etc.

N'Chwaning II Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
02504830017370752859000.jpg
Poldervaartite

N'Chwaning II Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
01808600017272023771533.jpg
Poldervaartite, etc.

N'Chwaning II Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
07072880017271987143833.jpg
Poldervaartite, etc.

N'Chwaning II Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
00807550017370752856594.jpg
Poldervaartite, etc.

N'Chwaning II Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
02504830017370752859000.jpg
Poldervaartite

N'Chwaning II Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
07990680017370550317861.jpg
Poldervaartite, etc.

N'Chwaning II Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
09931440017271987147656.jpg
Poldervaartite, etc.

N'Chwaning II Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
05076410017370752859800.jpg
Poldervaartite, etc.

N'Chwaning II Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
02504830017370752859000.jpg
Poldervaartite

N'Chwaning II Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
Locality type:Mine
Classification
Species:Poldervaartite
Formula:CaCa[SiO3(OH)](OH)
Comments:See Min Rec Article - all believed to be olmiite
Confirmation
Validity:Confirmed
Confirmation Methods:SEM-EDS
Confirmation Details:SEM-EDS: Where Tested and Reference ID - Joan Rosell, Barcelona
Associated Minerals:
Associates:Olmiite
Associated Minerals Based on Photo Data:
Bultfonteinite12
Olmiite6
Xonotlite6
Manganvesuvianite1
Data
Mineral Data:Click here to view Poldervaartite data
Locality Data:Click here to view N'Chwaning II Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:260707
Long-form Identifier:1:3:260707:8
GUID (UUID V4):0
Nearest other occurrences of Poldervaartite
0.6km (0.3 miles) ⓘN'Chwaning I Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
2.7km (1.7 miles) ⓘWessels Mine, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa
References
Cairncross, Bruce; Gutzmer, Jens (2002) SpektakulÃĪrer Neufund: Poldervaartit aus der N'Chwaning II- Mine, Kalahari, SÞdafrika [Spectacular new find: Poldervaartite from the N'Chwaning II mine, Kalahari, South Africa]. Lapis, 27 (5). 30-34; 50
Bonazzi, P., Bindi, L., Medenbach, O., Pagano, R., Lampronti, G. I., Menchetti, S. (2007) Olmiite, CaMn[SiO3(OH)](OH), the Mn-dominant analogue of poldervaartite, a new mineral species from Kalahari manganese fields (Republic of South Africa). Mineralogical Magazine, 71 (2). 193-201 doi:10.1180/minmag.2007.071.2.193
Pagano, Renato, Guastoni, Alessandro, Pezzotta, Federico (2008) Olmiite and poldervaartite from the Kalahari manganese field, Northern Cape Province, Republic of South Africa. The Mineralogical Record, 39 (5) 373-381
 
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