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Kolwezite

A valid IMA mineral species
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About KolweziteHide

Formula:
CuCo(CO3)(OH)2
Colour:
Black, brown, beige, pale beige, greenish
Hardness:
4
Specific Gravity:
3.97
Crystal System:
Triclinic
Probably Rosasite Group.


Unique IdentifiersHide

Mindat ID:
2243
Long-form identifier:
mindat:1:1:2243:5
GUID
(UUID V4):
ba8b03d0-9f0f-4364-be5e-c9cd50046646

IMA Classification of KolweziteHide

Classification of KolweziteHide

5.BA.10

5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
A : With Cu, Co, Ni, Zn, Mg, Mn
16a.3.1.7

16a : ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
3 : (AB)2(XO3)Zq
11.14.2

11 : Carbonates
14 : Carbonates of Co and Ni

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
KwzIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Pronunciation of KolweziteHide

Pronunciation:
PlayRecorded byCountry
Jolyon RalphUnited Kingdom

Physical Properties of KolweziteHide

Transparency:
Translucent
Colour:
Black, brown, beige, pale beige, greenish
Streak:
Beige
Hardness:
Density:
3.97(1) g/cm3 (Measured)    3.94 g/cm3 (Calculated)

Optical Data of KolweziteHide

Type:
Biaxial
RI values:
nα = 1.688(2) nγ = 1.900
Max Birefringence:
δ = 0.212
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v weak

Chemistry of KolweziteHide

Mindat Formula:
CuCo(CO3)(OH)2

Crystallography of KolweziteHide

Crystal System:
Triclinic
Cell Parameters:
a = 9.50 Å, b = 12.15 Å, c = 3.189 Å
α = 93.32°, β = 90.74°, γ = 91.47°
Ratio:
a:b:c = 0.782 : 1 : 0.262
Unit Cell V:
367.31 ų (Calculated from Unit Cell)
Z:
4
Morphology:
spherical aggregates, to 1 cm, and microcrystalline crusts.
Comment:
Point Group: 1 or 1; Space Group: P1 or P1.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
6.04 Å(80)
5.08 Å(80)
3.70 Å(100)
2.956 Å(50)
2.591 Å(80)
2.535 Å(50)
1.109 Å(50)
3.02 Å(40)
2.338 Å(40)
1.289 Å(40)
2.141 Å(30)
1.741 Å(30)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
47a : [Near-surface hydration of prior minerals]
47c : [Carbonates, phosphates, borates, nitrates]

Type Occurrence of KolweziteHide

General Appearance of Type Material:
Nodules (1-10 mm) and microcrystalline crusts.
Place of Conservation of Type Material:
1) Royal Museum of Central Africa, Tervuren, Belgium, RMG12975.
2) National Museum of Natural History, Washington, D.C., USA, R17228.
Geological Setting of Type Material:
Oxidized zone of a Cu-Co deposit
Associated Minerals at Type Locality:
Reference:
Deliens, M., Piret, P. (1980) La kolwézite, un hydroxycarbonate de cuivre et de cobalt analogue à la glaukosphaerite et à la rosaite. Bulletin de Minéralogie: 103: 179-184.

Synonyms of KolweziteHide

Other Language Names for KolweziteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
63 photos of Kolwezite associated with Cobalt-bearing Calcite(Ca,Co)CO3
25 photos of Kolwezite associated with Cobalt-bearing Dolomite(Ca,Mg,Co)CO3
13 photos of Kolwezite associated with MalachiteCu2(CO3)(OH)2
12 photos of Kolwezite associated with CalciteCaCO3
4 photos of Kolwezite associated with Manganese-bearing Calcite(Ca,Mn)CO3
4 photos of Kolwezite associated with ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
4 photos of Kolwezite associated with HeterogeniteCo3+O(OH)
3 photos of Kolwezite associated with PlancheiteCu8(Si8O22)(OH)4 · H2O
3 photos of Kolwezite associated with QuartzSiO2
3 photos of Kolwezite associated with SpherocobaltiteCoCO3

Related Minerals - Strunz-mindat GroupingHide

5.BA.05AzuriteCu3(CO3)2(OH)2Mon. 2/m : P21/b
5.BA.10Georgeite[Cu(OH)2-x(H2O)x][CO3]x/2Amor.
5.BA.10Glaukosphaerite(Cu,Ni)2(CO3)(OH)2Mon. 2/m : P21/b
5.BA.10MalachiteCu2(CO3)(OH)2Mon. 2/m : P21/b
5.BA.10Mcguinnessite(Mg,Cu)2(CO3)(OH)2Mon. 2/m
5.BA.10NullaginiteNi2(CO3)(OH)2Mon. 2/m : P21/b
5.BA.10PokrovskiteMg2(CO3)(OH)2Mon. 2/m : P21/b
5.BA.10Rosasite(Cu,Zn)2(CO3)(OH)2Mon. 2/m : P21/b
5.BA.10Zincrosasite(Zn,Cu)2(CO3)(OH)2Mon.
5.BA.10ChukanoviteFe2+2(CO3)(OH)2Mon. 2/m : P21/b
5.BA.10ParádsasváriteZn2(CO3)(OH)2Mon. 2/m : P21/b
5.BA.10PerchiazziiteCo2(CO3)(OH)2Mon. 2/m : P21/b
5.BA.15Aurichalcite(Zn,Cu)5(CO3)2(OH)6Mon. 2/m : P21/m
5.BA.15HydrozinciteZn5(CO3)2(OH)6Mon. 2/m : B2/m
5.BA.20HoldawayiteMn6(CO3)2(OH)7(Cl,OH)Mon. 2/m : B2/m
5.BA.25DeferniteCa6(CO3)1.58(Si2O7)0.21(OH)7[Cl0.50(OH)0.08(H2O)0.42]Orth. mmm (2/m 2/m 2/m) : Pnma
5.BA.25UM1977-03-COSiO:CaClHCa10-11(CO3)7(SiO4)Cl1-2(OH)1-2Mon.
5.BA.30Loseyite(Mn2+,Zn,Mg)4Zn3(CO3)2(OH)10Mon. 2/m
5.BA.30SclariteZn7(CO3)2(OH)10Mon. 2/m : B2/b

Other InformationHide

IR Spectrum:
Very similar to that of rosasite and somewhat similar to that of glaukosphaerite.
Thermal Behaviour:
A small endothermic break at 110°, a large one at 425° (loss of CO2), and a small one at 560°C (conversion of Co2O3 to Co3O4).
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for KolweziteHide

References for KolweziteHide

Reference List:

Localities for KolweziteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
DR Congo
 
  • Haut-Katanga
Paul De Bondt
  • Lualaba
    • Mutshatsha
      • Kamoto
Herve Osana photo
Gauthier et al. (1999)
Gauthier et al. (1999)
      • Kolwezi
Deliens et al. (1980) +2 other references
      • Sicomines copper-cobalt project
Mineralogical Record 22: 13-20
Paul De Bondt collection
Germany
 
  • North Rhine-Westphalia
    • Düsseldorf
      • Mettmann
        • Wülfrath
Schnorrer-Köhler (1991)
Greece
 
  • Attica
    • East Attica
      • Lavreotiki
        • Lavrion Mining District
          • Agios Konstantinos (Kamariza)
62. +1 other reference
Italy
 
  • Liguria
    • Genoa
      • Genoa
        • Borzoli
Anthony R Kampf
USA
 
  • Colorado
    • Hinsdale County
Williams (1982)
 
矿物 and/or 产地  
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