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N'Chwaning II Mine, N'Chwaning Mines, Kuruman, Kalahari manganese fields, Northern Cape Province, South Africa

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References:
- Hochleitner, R. (1986). Sturmanit und Ettringit aus den Kalahari-Manganfeldern. LAPIS 11 (10), 19-24.
- Bonazzi, P., Bindi, L., Medenbach, O., Pagano, R., Lampronti, 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, 193-291.




Group 2 - Sulphides and Sulfosalts
  		• Galena2.CD.10
    PbS
  		• Marcasite2.EB.10a
    FeS
     
    2
  		• Pyrite2.EB.05a
    FeS
     
    2
  		• Sphalerite2.CB.05a
    (Zn,Fe
    2+
     
    		)S
    Group 3 - Halides
  		• Creedite3.CG.15
    Ca
     
    3
    		[SO
     
    4
    		|Al
     
    2
    		F
     
    8
    		(OH)
     
    2
    		] · 2H
     
    2
    		O
    Group 4 - Oxides and Hydroxides
  		• Bixbyite4.CB.10
    (Mn
    3+
     
    		,Fe
    3+
     
    		)
     
    2
    		O
     
    3
  		• Brucite4.FE.05
    Mg(OH)
     
    2
  		• Goethite4.FD.10
    α-Fe
    3+
     
    		O(OH)
  		• Groutite4.FD.10
    Mn
    3+
     
    		O(OH)
  		• Hausmannite4.BB.10
    MnMn
     
    2
    		O
     
    4
  		• Hematite4.CB.05
    Fe
     
    2
    		O
     
    3
  		• Jacobsite4.BB.05
    Mn
    2+
     
    		Fe
    3+
    2
    		O
     
    4
  		• Lepidocrocite4.FE.15
    γ-Fe
    3+
     
    		O(OH)
  		• Manganite4.FD.15
    Mn
    3+
     
    		O(OH)
  		• Marokite4.BC.05
    CaMn
     
    2
    		O
     
    4
  		• Portlandite4.FE.05
    Ca(OH)
     
    2
  		• Pyrochroite4.FE.05
    Mn(OH)
     
    2
  		• Quartz4.DA.05
    SiO
     
    2
  		• Todorokite4.DK.10
    (Ca,K,Na,Mg,Ba,Mn)(Mn,Mg,Al)
     
    6
    		O
     
    12
    		·3H
     
    2
    		O
    Group 5 - Nitrates and Carbonates
  		• Aragonite5.AB.15
    CaCO
     
    3
  		• Calcite5.AB.05
    CaCO
     
    3
  		• Kutnohorite5.AB.10
    Ca(Mn,Mg,Fe)(CO
     
    3
    		)
     
    2
  		• Rhodochrosite5.AB.05
    MnCO
     
    3
    Group 6 - Borates
  		• Gaudefroyite6.AB.60
    Ca
     
    4
    		Mn
    3+
    2-3
    		[(O,OH)
     
    3
    		|CO
     
    3
    		|(BO
     
    3
    		)
     
    3
    		]
  		• Gowerite6.EC.10
    Ca[B
     
    5
    		O
     
    8
    		(OH)][B(OH)
     
    3
    		]·3H
     
    2
    		O
  		• Sussexite6.BA.15
    (Mn
    2+
     
    		,Mg)
     
    2
    		[(OH)(B
     
    2
    		O
     
    4
    		(OH))]
    Group 7 - Sulphates, Chromates, Molybdates and Tungstates
  		• Baryte7.AD.35
    BaSO
     
    4
  		• Celestine7.AD.35
    SrSO
     
    4
  		• Charlesite7.DG.15
    Ca
     
    6
    		(Al,Si)
     
    2
    		[(OH,O)
     
    12
    		|B(OH)
     
    4
    		|(SO
     
    4
    		)
     
    2
    		] · 26H
     
    2
    		O
  		• Ettringite7.DG.15
    Ca
     
    6
    		Al
     
    2
    		[(OH)
     
    4
    		|SO
     
    4
    		]
     
    3
    		 · 26H
     
    2
    		O
  		• Gypsum7.CD.40
    Ca[SO
     
    4
    		] · 2H
     
    2
    		O
  		• Jouravskite7.DG.15
    Ca
     
    6
    		Mn
    3+
    2
    		[(OH)
     
    4
    		|(SO
     
    4
    		,CO
     
    3
    		)]
     
    3
    		 · 26H
     
    2
    		O
  		• Shigaite7.DD.35
    Al
     
    4
    		Mn
     
    7
    		(SO
     
    4
    		)
     
    2
    		(OH)
     
    22
    		·8H
     
    2
    		O
  		• Sturmanite7.DG.15
    Ca
     
    6
    		(Fe
    3+
     
    		,Al,Mn
    3+
     
    		)
     
    2
    		[(OH)
     
    12
    		|B(OH)
     
    4
    		|(SO
     
    4
    		)
     
    2
    		] · 25H
     
    2
    		O
  		• Thaumasite7.DG.15
    Ca
     
    3
    		[CO
     
    3
    		|SO
     
    4
    		|Si(OH)
     
    6
    		] · 12H
     
    2
    		O
    Group 9 - Silicates
  		• Afwillite9.AG.75
    Ca
     
    3
    		[HSiO
     
    4
    		]
     
    2
    		 · 2H
     
    2
    		O
  		• Andradite9.AD.25
    Ca
     
    3
    		Fe
    3+
    2
    		[SiO
     
    4
    		]
     
    3
  		• Apophyllite-(KOH)9.EA.15
    KCa
     
    4
    		[(OH,F)|Si
     
    8
    		O
     
    20
    		] · 8H
     
    2
    		O
  		• Bementite9.EE.05
    Mn
     
    5
    		Si
     
    4
    		O
     
    10
    		(OH)
     
    6
  		• Braunite9.AG.05
    Mn
    2+
     
    		Mn
    3+
    6
    		[O
     
    8
    		|SiO
     
    4
    		]
  		• Bultfonteinite9.AG.80
    Ca
     
    2
    		[F|HSiO
     
    4
    		] · H
     
    2
    		O
  		• Bustamite9.DG.05
    (Mn
    2+
     
    		,Ca)[SiO
     
    3
    		]
  		• Caryopilite9.ED.15
    (Mn,Mg)
     
    3
    		Si
     
    2
    		O
     
    5
    		(OH)
     
    4
  		• Clinochlore9.EC.55
    (Mg,Fe
    2+
     
    		)
     
    5
    		Al[(OH)
     
    8
    		|AlSi
     
    3
    		O
     
    10
    		]
  		• Datolite9.AJ.20
    CaB[OH|SiO
     
    4
    		]
  		• Diopside9.DA.15
    CaMg[Si
     
    2
    		O
     
    6
    		]
  		• Friedelite9.EE.10
    (Mn,Fe)
     
    8
    		Si
     
    6
    		O
     
    15
    		(OH,Cl)
     
    10
  		• Gageite9.DH.35
    Mn
     
    21
    		O
     
    3
    		(Si
     
    4
    		O
     
    12
    		)
     
    2
    		(OH)
     
    20
  		• Henritermierite9.AD.25
    Ca
     
    3
    		(Mn
    3+
     
    		,Al)
     
    2
    		[(OH)
     
    4
    		|(SiO
     
    4
    		)
     
    2
    		]
  		• Hibschite9.AD.25
    Ca
     
    3
    		Al
     
    2
    		[(OH)
     
    6-1
    		|(SiO
     
    4
    		)
     
    1.5-2.5
    		]
  		• Inesite9.DL.05
    Ca
     
    2
    		(Mn,Fe)
     
    7
    		Si
     
    10
    		O
     
    28
    		(OH)
     
    2
    		·5H
     
    2
    		O
  		• Leucophoenicite9.AF.60
    Mn
    2+
    7
    		[(OH)
     
    2
    		|(SiO
     
    4
    		)
     
    3
    		]
  		• Lizardite9.ED.15
    Mg
     
    3
    		[(OH)
     
    4
    		|Si
     
    2
    		O
     
    5
    		]
  		• Manganvesuvianite (TL)9.BG.35
    Ca
     
    19
    		Mn(Al,Mn,Fe)
     
    19
    		(Mg,Mn)
     
    2
    		Si
     
    18
    		O
     
    69
    		(OH)
     
    9
  		• Mozartite9.AG.60
    CaMn
    3+
     
    		[OH|SiO
     
    4
    		]
  		• Nchwaningite (TL)9.DB.30
    Mn
    2+
    2
    		[(OH)
     
    2
    		|SiO
     
    3
    		] · H
     
    2
    		O
  		• Olmiite (TL)9.AF.90
    CaMn
    2+
     
    		[SiO
     
    3
    		(OH)](OH)
  		• Oyelite9.HA.80
    Ca
     
    10
    		Si
     
    8
    		B
     
    2
    		O
     
    29
    		·12.5H
     
    2
    		O
  		• Pectolite9.DG.05
    NaCa
     
    2
    		[HSi
     
    3
    		O
     
    9
    		]
  		• Phlogopite9.EC.20
    KMg
     
    3
    		[(OH,F)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
  		• Poldervaartite ?9.AF.90
    CaCa[SiO
     
    3
    		OH](OH)
  		• Prehnite9.DP.20
    Ca
     
    2
    		Al
     
    2
    		Si
     
    3
    		O
     
    12
    		(OH)
  		• Richterite9.DE.20
    Na[CaNa][Mg
     
    5
    		][(OH)
     
    2
    		|Si
     
    8
    		O
     
    22
    		]
  		• Ruizite9.BJ.35
    Ca
     
    2
    		Mn
    3+
    2
    		[(OH)
     
    2
    		|H
     
    2
    		Si
     
    4
    		O
     
    13
    		] · 2H
     
    2
    		O
  		• Saponite9.EC.45
    Ca
     
    0.25
    		(Mg,Fe)
     
    3
    		(Si,Al)
     
    4
    		O
     
    10
    		(OH)
     
    2
    		·nH
     
    2
    		O
  		• Sugilite9.CM.05
    KNa
     
    2
    		(Fe,Mn,Al)
     
    2
    		Li
     
    3
    		Si
     
    12
    		O
     
    30
  		• Tephroite9.AC.05
    Mn
    2+
    2
    		[SiO
     
    4
    		]
  		• Vesuvianite9.BG.35
    Ca
     
    10
    		(Mg,Fe)
     
    2
    		Al
     
    4
    		Si
     
    9
    		O
     
    34
    		(OH)
     
    4
  		• Xonotlite9.DG.35
    Ca
     
    6
    		Si
     
    6
    		O
     
    17
    		(OH)
     
    2
    Unclassified Minerals
  		• 'Chlorite Group'-
  		• Glauconite-
    K
     
    0.08
    		R
    1
    1.33
    		 R
    2
    0.67
    		 [][Al
     
    0.13
    		Si
     
    3.87
    		O
     
    10
    		](OH)
     
    2


    71 entries listed. 70 valid minerals. 1 erroneous literature entry.

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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Jobs in South Africa Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 11th Nov 2009 04:19:26