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


List of minerals arranged by Dana 8th Edition classification
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Marcasite2.12.2.1FeS2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Bixbyite4.3.7.2Mn3+2O3
Hematite4.3.1.2Fe2O3
AX2
Pyrolusite ?4.4.1.4MnO2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Diaspore6.1.1.1AlO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Groutite6.1.1.3Mn3+O(OH)
Lepidocrocite6.1.2.2γ-Fe3+O(OH)
Manganite6.1.3.1Mn3+O(OH)
X(OH)2
Brucite6.2.1.1Mg(OH)2
Portlandite6.2.1.4Ca(OH)2
Pyrochroite6.2.1.3Mn(OH)2
Group 7 - MULTIPLE OXIDES
AB2X4
Hausmannite7.2.7.1MnMn2O4
Jacobsite7.2.2.2Mn2+Fe3+2O4
Marokite7.2.10.1CaMn2O4
(AB)2X3
Braunite7.5.1.3Mn2+Mn3+6(SiO4)O8
'Braunite-II'7.5.1.3CaMn3+14(SiO4)O20
AB3X7
Todorokite7.8.1.1(Ca,K,Na,Mg,Ba,Mn)(Mn,Mg,Al)6O12 · 3H2O
Group 12 - COMPOUND HALIDES
Miscellaneous
Creedite12.1.4.1Ca3SO4Al2F8(OH)2 · 2H2O
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Rhodochrosite14.1.1.4MnCO3
AB(XO3)2
Kutnohorite14.2.1.3Ca(Mn,Mg,Fe)(CO3)2
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 25 - ANHYDROUS BORATES CONTAINING HYDROXYL OR HALOGEN
Diborates
Sussexite25.2.1.1Mn2+BO2(OH)
Group 26 - HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
Pentaborates
Gowerite26.5.8.1Ca[B5O8(OH)][B(OH)3] · 3H2O
Group 27 - COMPOUND BORATES
Miscellaneous
Gaudefroyite27.1.2.1Ca4Mn3+2-3(BO3)3(CO3)(O,OH)3
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Baryte28.3.1.1BaSO4
Celestine28.3.1.2SrSO4
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 31 - HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)m(XO4)pZq·xH2O, where m:p > 6:1
Shigaite31.1.2.1Mn6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2O
(AB)2(XO4)Zq·xH2O
Despujolsite31.7.6.1Ca3Mn4+(SO4)2(OH)6 · 3H2O
Miscellaneous
Ettringite31.10.2.1Ca6Al2(SO4)3(OH)12 · 26H2O
Group 32 - COMPOUND SULFATES
Hydrated Compound Sulfates containing Hydroxyl or Halogen
Charlesite32.4.4.1Ca6(Al,Si)2(SO4)2[B(OH)4](OH,O)12 · 26H2O
Jouravskite32.4.4.3Ca6Mn3+2(SO4,CO3)3(OH)12 · 26H2O
Sturmanite32.4.4.2Ca6(Fe3+,Al,Mn3+)2(SO4)2[B(OH)4](OH)12 · 25H2O
Thaumasite32.4.4.4Ca3(SO4)[Si(OH)6](CO3) · 12H2O
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with all cations in octahedral [6] coordination
Tephroite51.3.1.4Mn2+2SiO4
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Andradite51.4.3b.1Ca3Fe3+2(SiO4)3
Grossular
var: Hibschite		51.4.3d.1Ca3Al2(SiO4)3-x(OH)4x
Henritermierite51.4.4.1Ca3(Mn3+,Al)2(SiO4)2(OH)4
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
Leucophoenicite52.3.2c.2Mn2+7(SiO4)3(OH)2
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Afwillite52.4.7.1Ca3(HSiO4)2 · 2H2O
Bultfonteinite52.4.7.2Ca2(HSiO4)F · H2O
Mozartite52.4.2.1CaMn3+(SiO4)(OH)
Group 54 - NESOSILICATES Borosilicates and Some Beryllosilicates
Borosilicates and Some Beryllosilicates with B in [4] coordination
Datolite54.2.1a.1Ca(HBSiO5)
Group 57 - SOROSILICATES Si3O10 Groups and Larger Noncyclic Groups
Insular Si3O10 and Larger Noncyclic Groups with [Si4O13] groups
Ruizite57.2.2.1Ca2Mn3+2[(OH)2|H2Si4O13] · 2H2O
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Vesuvianite58.2.4.1(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Group 63 - CYCLOSILICATES Condensed Rings
Condensed Rings (Milarite - Osumilite group)
Sugilite63.2.1a.9K(Na,□)2Li3(Fe,Mn,Al,Zr)2[Si12O30]
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Diopside65.1.3a.1CaMgSi2O6
Nchwaningite (TL)65.1.8.1Mn2+2(SiO3)(OH)2 · H2O
Single-Width Unbranched Chains, W=1 with chains P=3
Bustamite65.2.1.2CaMn2+(Si2O6)
Pectolite65.2.1.4aNaCa2(HSi3O9)
Single-Width Unbranched Chains, W=1 with chains P=4
Gageite-2M65.3.2.2a(Mn,Mg,Zn)42Si16O54(OH)40
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Richterite66.1.3b.9{Na}{CaNa}{Mg5}(Si8O22)(OH)2
Amphiboles - Ca-Na subgroup
Inesite66.3.3.1Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O
Xonotlite66.3.1.1Ca6(Si6O17)(OH)2
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 1:1 layers
Caryopilite71.1.2b.1(Mn,Mg)3(Si2O5)(OH)4
Guidottiite (TL)71.1.4.8Mn2Fe3+(Fe3+SiO5)(OH)4
Lizardite71.1.2b.2Mg3(Si2O5)(OH)4
Sheets of 6-membered rings with 2:1 layers
Glauconite71.2.2a.5(K,Na)(Fe3+,Al,Mg)2((Si,Al)4O10)(OH)2
Phlogopite71.2.2b.1KMg3(AlSi3O10)(OH,F)2
Sheets of 6-membered rings with 2:1 clays
Saponite71.3.1b.2Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
Clinochlore71.4.1.4(Mg,Fe2+)5Al(AlSi3O10)(OH)8
Group 72 - PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 4-membered rings
Prehnite72.1.3.1Ca2Al2Si3O10(OH)2
Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 3-, 4-, or 5-membered rings and 8-membered rings
Oyelite72.3.2.8Ca10Si8B2O29 · 12.5H2O
Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 4-, 6-, and 12-membered rings
Friedelite72.4.1b.1(Mn,Fe)8Si6O15(OH,Cl)10
Group 73 - PHYLLOSILICATES Condensed Tetrahedral Sheets
Condensed Tetrahedral Sheets with double and single layers
Orlymanite73.2.2b.2Ca4Mn3Si8O20(OH)6 · 2H2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 78 - Unclassified Silicates
Miscellaneous
Poldervaartite78.1.8.1CaCa[SiO3(OH)](OH)
Bementite78.5.2.1Mn7Si6O15(OH)8
Unclassified Minerals
'Apophyllite'-
Apophyllite-(KOH)-KCa4(Si8O20)(OH,F) · 8H2O
Aragonite-CaCO3
Calcite
var: Manganoan Calcite		-(Ca,Mn)CO3
'Chlorite Group'-
Gageite-Mn21O3(Si4O12)2(OH)20
'Manganese Oxides'-
Manganvesuvianite (TL)-Ca19Mn3+(Al,Mn3+,Fe3+)10(Mg,Mn2+)2(Si2O7)4(SiO4)10O(OH)9
Olmiite (TL)-CaMn2+[SiO3(OH)](OH)
Quartz
var: Chalcedony		-SiO2


84 entries listed. 80 valid minerals.

References

Hochleitner, R. (1986): Neufund von Gaudefroyit-Kristallen in Südafrika. LAPIS 11 (6), 19-20.

Cairncross, B. and R. Dixon (1995) Minerals of South Africa.

Cairncross, B., Beukes, N. and Gutzmer, J. (1997): The Manganese Adventure – The South African Manganese Fields. Associated Ore & Metal Corporation Limited, Johannesburg, Republic of South Africa.

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