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Comblainite

A valid IMA mineral species
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08430200017056585675198.jpg
Comblainite, etc.

Shinkolobwe Mine, Shinkolobwe, Kambove Territory, Haut-Katanga, DR Congo
01730620017057097288800.jpg
Comblainite, etc.

Shinkolobwe Mine, Shinkolobwe, Kambove Territory, Haut-Katanga, DR Congo
08430200017056585675198.jpg
Comblainite, etc.

Shinkolobwe Mine, Shinkolobwe, Kambove Territory, Haut-Katanga, DR Congo
01730620017057097288800.jpg
Comblainite, etc.

Shinkolobwe Mine, Shinkolobwe, Kambove Territory, Haut-Katanga, DR Congo
08430200017056585675198.jpg
Comblainite, etc.

Shinkolobwe Mine, Shinkolobwe, Kambove Territory, Haut-Katanga, DR Congo
01730620017057097288800.jpg
Comblainite, etc.

Shinkolobwe Mine, Shinkolobwe, Kambove Territory, Haut-Katanga, DR Congo
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About ComblainiteHide

05282860017070822012054.jpg
Gordon Comblain
Formula:
Ni4Co2(OH)12[CO3] · 3H2O
Colour:
Turquoise-blue, yellow-green under a microscope
Hardness:
2
Specific Gravity:
3.05
Crystal System:
Trigonal
Name:
Named in 1980 by Paul Piret and Michel Deliens in honor of Gordon Comblain [August 11, 1920, Hackney, London, England, UK - 1996 Brussels, Belgium]. Comblain, a Belgian citizen, worked as a mining engineer from 1946 till 1965 for the Société des Mines d'Etain du Ruanda-Urundi and did mining and exploratory missions in Central Africa. From 1965 until his retirement in 1985, he worked as a laboratory technician for the department of mineralogy of the Koninklijk Museum voor Midden-Afrika, Tervuren, Belgium.
Chemically related to UM1998-10-CO:CoHNi.


Unique IdentifiersHide

Mindat ID:
1116
Long-form identifier:
mindat:1:1:1116:3
GUID
(UUID V4):
8cf9efe2-e473-4d7f-b15d-745abd20f9c2

IMA Classification of ComblainiteHide

Classification of ComblainiteHide

Strunz-mindat (2024):
5.DA.50

5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
A : With medium-sized cations
Dana 8th ed.:
16b.6.3.3

16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
6 : AmBn(XO3)pZqxH2O & with (m+n):p = 8:1
Hey's CIM Ref.:
11.14.11

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

Physical Properties of ComblainiteHide

Transparency:
Translucent
Colour:
Turquoise-blue, yellow-green under a microscope
Hardness:
2 on Mohs scale
Density:
3.05(2) g/cm3 (Measured)    3.24(8) g/cm3 (Calculated)

Optical Data of ComblainiteHide

Type:
Uniaxial (-)
RI values:
nω = 1.690(2) nε = 1.684(2)
Max Birefringence:
δ = 0.006
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Colour in reflected light:
Yellow-green
Pleochroism:
Non-pleochroic

Chemistry of ComblainiteHide

Mindat Formula:
Ni4Co2(OH)12[CO3] · 3H2O
Elements listed:
C, Co, H, Ni, O - search for minerals with similar chemistry

Crystallography of ComblainiteHide

Crystal System:
Trigonal
Cell Parameters:
a = 3.038 Å, c = 22.79 Å
Ratio:
a:c = 1 : 7.502
Unit Cell V:
182.16 ų (Calculated from Unit Cell)
Morphology:
cryptocrystalline crusts
Comment:
Point Group: 3 2/m, 3m, 32, 3, or 3. Space Group: R3m, R3m, R32, R3, or R3. Z = [3/8]

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.64 Å(100)
2.567 Å(70)
3.808 Å(50)
2.278 Å(50)
1.934 Å(40)
1.489 Å(30)
1.519 Å(20)
Comments:
Shinkolobwe, Congo. Data from the type description. Pattern is similar to that of takovite.

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 ComblainiteHide

Type Locality:
ⓘ Shinkolobwe Mine, Shinkolobwe, Kambove Territory, Haut-Katanga, DR Congo
General Appearance of Type Material:
Turquoise-blue cryptocrystalline crusts on altered uraninite.
Place of Conservation of Type Material:
Royal Museum for Central Africa, Tervuren; National Museum of Natural History, Washington
Geological Setting of Type Material:
Secondary product of nickel and cobalt sulfides in the oxidized zone of a uranium deposit.
Associated Minerals at Type Locality:
UraniniteRutherfordineHeterogeniteCuriteBecquerelite
Reference:
Piret, P., Deliens, M. (1980) La comblainite, (Ni2+x, Co3+1-x)(OH)2(CO3)(1-x)/2·yH2O, nouveau minéral du groupe de la pyroaurite. Bulletin de Minéralogie: 103: 113-117.
Download:
https://www.persee.fr/doc/bulmi_0180-9210_1980_num_103_1_7381

Synonyms of ComblainiteHide

Other Language Names for ComblainiteHide

German:Comblainit
Spanish:Comblainita

Relationship of Comblainite to other SpeciesHide

Member of:
Quintinite Group > Hydrotalcite Supergroup
Other Members of this group:
CaresiteFe2+4Al2(OH)12[CO3] · 3H2OTrig. 3 2 : P31 1 2
CharmariteMn2+4Al2(OH)12[CO3] · 3H2OHex.
ChlormagaluminiteMg4Al2(OH)12Cl2 · 3H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mcm
QuintiniteMg4Al2(OH)12(CO3) · 3H2OHex. 6 2 2 : P63 2 2
ZaccagnaiteZn4Al2(OH)12[CO3] · 3H2OHex.

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Comblainite associated with UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
1 photo of Comblainite associated with Schoepite(UO2)8O2(OH)12 · 12H2O

Related Minerals - Strunz-mindat GroupingHide

5.DA.AlexkhomyakoviteK6(Ca2Na)(CO3)5Cl · 6H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mcm
5.DA.AmoraiteCa12Al6(OH)36(CO3)2(SO3) · 15H2O Tric. 1 : P1
5.DA.05DypingiteMg5(CO3)4(OH)2 · 5H2OMon.
5.DA.05GiorgiositeMg5(CO3)4(OH)2 · 5-6H2O
5.DA.05HydromagnesiteMg5(CO3)4(OH)2 · 4H2OMon. 2/m : P21/b
5.DA.05WidgiemoolthaliteNi5(CO3)4(OH)2 · 5H2OMon. 2/m : P21/b
5.DA.05UM1986-10-CO:ClHMgMnZn (also called Mineral F, Dunn, 1995)Mg5(Zn,Mn)3(CO3)2(OH,Cl)12 · H2O
5.DA.05UM1987-01-CO:HMgSMg4(CO3)2(OH)4 · 6H2O ?Mon.
5.DA.10ArtiniteMg2(CO3)(OH)2 · 3H2OMon. 2/m : B2/m
5.DA.10IndigiriteMg2Al2(CO3)4(OH)2 · 15H2O
5.DA.10ChlorartiniteMg2(CO3)(OH)Cl · 2H2OTrig. 3m : R3c
5.DA.15OtwayiteNi2(CO3)(OH)2 · H2OOrth.
5.DA.15ZaratiteNi3(CO3)(OH)4 · 4H2O ?Iso.
5.DA.20KambaldaiteNaNi4(CO3)3(OH)3 · 3H2OHex. 6 : P63
5.DA.25CallaghaniteCu2Mg2(CO3)(OH)6 · 2H2OMon. 2/m : B2/b
5.DA.30Claraite(Cu,Zn)15(CO3)4(AsO4)2(SO4)(OH)14 · 7H2OTric. 1 : P1
5.DA.35HydroscarbroiteAl14(CO3)3(OH)36 · nH2OTric.
5.DA.35ScarbroiteAl5(CO3)(OH)13 · 5H2OTric.
5.DA.40CaresiteFe2+4Al2(OH)12[CO3] · 3H2OTrig. 3 2 : P31 1 2
5.DA.40QuintiniteMg4Al2(OH)12(CO3) · 3H2OHex. 6 2 2 : P63 2 2
5.DA.40CharmariteMn2+4Al2(OH)12[CO3] · 3H2OHex.
5.DA.40KarchevskyiteMg18Al9(OH)54Sr2(CO3)9(H2O)6 (H3O)5Trig.
5.DA.40UM1987-05-OH:AlCMgMg4Al2(OH)12(CO3,SO4) · 3H2O
5.DA.45Stichtite-2HMg6(Cr,Al)2(CO3)(OH)16 · 4H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
5.DA.45BrugnatelliteMg6Fe3+(CO3)(OH)13 · 4H2OHex.
5.DA.45ChlormagaluminiteMg4Al2(OH)12Cl2 · 3H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mcm
5.DA.45Hydrotalcite-2HMg6Al2(CO3)(OH)16 · 4H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
5.DA.45Pyroaurite-2HMg6Fe3+2(OH)16(CO3) · 4H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
5.DA.45ZaccagnaiteZn4Al2(OH)12[CO3] · 3H2OHex.
5.DA.45LiudongshengiteZn4Cr2(OH)12(CO3) · 3H2OTrig. 3m (3 2/m) : R3m
5.DA.50DesautelsiteMg6Mn3+2(OH)16[CO3] · 4H2OTrig. 3m (3 2/m)
5.DA.50HydrotalciteMg6Al2(CO3)(OH)16 · 4H2OTrig. 3m (3 2/m) : R3m
5.DA.50PyroauriteMg6Fe3+2(OH)16[CO3] · 4H2OTrig. 3m (3 2/m) : R3m
5.DA.50ReevesiteNi6Fe3+2(OH)16(CO3) · 4H2OTrig. 3m (3 2/m) : R3m
5.DA.50StichtiteMg6Cr3+2(OH)16[CO3] · 4H2OTrig. 3m (3 2/m) : R3m
5.DA.50TakoviteNi6Al2(OH)16[CO3] · 4H2OTrig. 3m (3 2/m) : R3m
5.DA.50KaznakhtiteNi6Co3+2(CO3)(OH)16 · 4H2OTrig. 3 : R3
5.DA.55CoalingiteMg10Fe3+2(OH)24[CO3] · 2H2OTrig. 3m (3 2/m) : R3m
5.DA.55Akopovaite Al4Li2(OH)12(CO3)(H2O)3Mon. 2/m : B2/m
5.DA.60ŠlikiteZn2Mg(CO3)2(OH)2 · 4H2OTric. 1 : P1
5.DA.65MarkliteCu5(CO3)2(OH)6 · 6H2OMon. 2/m : P21/b

Other InformationHide

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 ComblainiteHide

References for ComblainiteHide

Localities for ComblainiteHide

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.
China
 
  • Yunnan
    • Pu'er
      • Jiangcheng County
高翔 et al. (2013)
DR Congo (TL)
 
  • Haut-Katanga
    • Kambove Territory
      • Shinkolobwe
edit.africamuseum.be (n.d.) +2 other references
Germany
 
  • Lower Saxony
    • Goslar District
      • Langelsheim
        • Lautenthal
Schnorrer-Köhler (1988)
Switzerland
 
  • Valais
    • Sierre
      • Anniviers
        • Ayer
Ansermet (2012)
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