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Kobokoboite

A valid IMA mineral species
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05157890014977337513065.jpg
Kobokoboite

Kobokobo pegmatite, Mwenga Territory, South Kivu, DR Congo
03525380017119295278203.jpg
Kobokoboite

General Trimble's Mine, East Whiteland Township, Chester County, Pennsylvania, USA
03917670014948306227091.jpg
Kobokoboite

Kobokobo pegmatite, Mwenga Territory, South Kivu, DR Congo
06279940014946705523722.jpg
Kobokoboite

Kobokobo pegmatite, Mwenga Territory, South Kivu, DR Congo
03525380017119295278203.jpg
Kobokoboite

General Trimble's Mine, East Whiteland Township, Chester County, Pennsylvania, USA
09985280015052812916878.jpg
Kobokoboite

Kobokobo pegmatite, Mwenga Territory, South Kivu, DR Congo
06279940014946705523722.jpg
Kobokoboite

Kobokobo pegmatite, Mwenga Territory, South Kivu, DR Congo
03525380017119295278203.jpg
Kobokoboite

General Trimble's Mine, East Whiteland Township, Chester County, Pennsylvania, USA
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About KobokoboiteHide

Formula:
Al6(PO4)4(OH)6 · 11H2O
Colour:
Pearly white
Lustre:
Pearly
Hardness:
2
Specific Gravity:
2.21
Crystal System:
Triclinic
Name:
Named in 2010 by Stuart J. Mills, William D. Birch, Anthony R. Kampf, A. R. and L. van Wambeke (2010) for the original locality.
Related to afmite, matulaite and planerite.


Unique IdentifiersHide

Mindat ID:
39715
Long-form identifier:
mindat:1:1:39715:1
GUID
(UUID V4):
02b76ec2-515e-463f-9d24-88ec2f36762f

IMA Classification of KobokoboiteHide

Classification of KobokoboiteHide

Strunz-mindat (2024):
8.DD.25

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
D : With only medium-sized cations, (OH, etc.):RO4= 2:1

Mineral SymbolsHide

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

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

Physical Properties of KobokoboiteHide

Lustre:
Pearly
Transparency:
Transparent, Translucent
Colour:
Pearly white
Streak:
White
Hardness:
2 on Mohs scale
Hardness Data:
Estimated
Tenacity:
Brittle
Fracture:
Irregular/Uneven
Density:
2.21(3) g/cm3 (Measured)    2.287 g/cm3 (Calculated)

Optical Data of KobokoboiteHide

Type:
Biaxial (-)
Pleochroism:
Non-pleochroic

Chemistry of KobokoboiteHide

Mindat Formula:
Al6(PO4)4(OH)6 · 11H2O
Elements listed:
Al, H, O, P - search for minerals with similar chemistry

Crystallography of KobokoboiteHide

Crystal System:
Triclinic
Cell Parameters:
a = 7.460(1) Å, b = 7.737(1) Å, c = 12.385(5) Å
α = 102.79(2)°, β = 90.20(3)°, γ = 116.33(2)°
Ratio:
a:b:c = 0.964 : 1 : 1.601
Unit Cell V:
620.6 ų
Z:
1
Comment:
space group P1 or P1

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
11.990 Å(100)
6.868 Å(45)
3.552 Å(39)
6.006 Å(33)
3.081 Å(29)

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 KobokoboiteHide

Type Locality:
ⓘ Kobokobo pegmatite, Mwenga Territory, South Kivu, DR Congo
General Appearance of Type Material:
Thick crusts and coatings.
Place of Conservation of Type Material:
Museum Victoria, Melbourne, Australia, (M49194).
Geological Setting of Type Material:
Granite pegmatites.
Associated Minerals at Type Locality:
WavelliteVariscitePlaneriteMuscoviteKeckite
HydroxylapatiteFrondeliteEvansiteAfmite
Reference:
Mills, S. J., Birch, W. D., Kampf, A. R. & van Wambeke, L. (2010) Kobokoboite, Al6(PO4)4(OH)6•11H2O, a new mineral from the Kobokobo pegmatite, Democratic Republic of the Congo. European Journal of Mineralogy, 22(2), 305–308.
Download:
https://rruff.info/rruff_1.0/uploads/EJM22_305.pdf

Synonyms of KobokoboiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
4 photos of Kobokoboite associated with CrandalliteCaAl3(PO4)(PO3OH)(OH)6
4 photos of Kobokoboite associated with WavelliteAl3(PO4)2(OH,F)3 · 5H2O
2 photos of Kobokoboite associated with FurongiteAl13(UO2)7(PO4)13(OH)14 · 58H2O
2 photos of Kobokoboite associated with TrianguliteAl3(UO2)4(PO4)4(OH)5 · 5H2O
1 photo of Kobokoboite associated with UraniniteUO2

Related Minerals - Strunz-mindat GroupingHide

8.DD.Bettertonite[Al6(AsO4)3(OH)9(H2O)5] · 11H2OMon. 2/m : P21/b
8.DD.Penberthycroftite[Al6(AsO4)3(OH)9(H2O)5] · 8H2OMon. 2/m : P21/b
8.DD.VargiteCu2Mn3(AsO4)2(OH)4(H2O)4Mon. 2/m : P21/b
8.DD.GaleaclolusiteAl6(AsO4)3(OH)9(H2O)4 · 8H2OOrth. mmm (2/m 2/m 2/m) : Pnma
8.DD.05ChenevixiteCu2Fe3+2(AsO4)2(OH)4Mon. 2/m : P21/m
8.DD.05LuetheiteCu2Al2(AsO4)2(OH)4Mon. 2/m : P21/m
8.DD.10Akrochordite(Mn2+,Mg)5(AsO4)2(OH)4 · 4H2OMon. 2/m : P21/b
8.DD.10GuanacoiteCu2Mg3(AsO4)2(OH)4 · 4H2OMon. 2/m : P21/b
8.DD.15Aheylite(Fe2+,Zn)Al6(PO4)4(OH)8 · 4H2OTric. 1 : P1
8.DD.15ChalcosideriteCuFe3+6(PO4)4(OH)8 · 4H2OTric. 1 : P1
8.DD.15CoeruleolactiteTric. 1 : P1
8.DD.15FaustiteZnAl6(PO4)4(OH)8 · 4H2OTric. 1 : P1
8.DD.15PlaneriteAl6(PO4)2(PO3OH)2(OH)8 · 4H2OTric. 1 : P1
8.DD.15TurquoiseCuAl6(PO4)4(OH)8 · 4H2OTric. 1 : P1
8.DD.15AfmiteAl3(OH)4(H2O)3(PO4)(PO3OH) · H2OTric. 1 : P1
8.DD.15UM1981-32-PO:FeHFe2+Fe3+6(PO4)4-x[PO3(OH)]x(OH)8 · 4H2O
8.DD.20ChildreniteFe2+Al(PO4)(OH)2 · H2OOrth. mm2 : Ccc2
8.DD.20EosphoriteMn2+Al(PO4)(OH)2 · H2OOrth. mmm (2/m 2/m 2/m) : Cmca
8.DD.20Ernstite(Mn2+,Fe3+)Al(PO4)(OH,O)2 · H2OMon.
8.DD.20LefontiteFe2Al2Be(PO4)2(OH)6Orth. mmm (2/m 2/m 2/m) : Cmca
8.DD.30SmamiteCa2Sb(OH)4[H(AsO4)2] · 6H2OTric. 1 : P1
8.DD.35GutsevichiteAl3(PO4)2(OH)3 · 8H2OIso.
8.DD.40Laubmannite (of Moore)(Fe3+,Fe2+,M)8+x(OH,H2O)9(H2O)2(PO4)5, M = Fe3+, Cu2+ or other metal cation, x ~ 0.1.Orth. mmm (2/m 2/m 2/m) : Pbcm

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 KobokoboiteHide

References for KobokoboiteHide

Localities for KobokoboiteHide

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 (TL)
 
  • South Kivu
    • Mwenga Territory
Mills et al. (2010)
France
 
  • Occitanie
    • Tarn
      • Castres
        • Fontrieu
          • Fumade
Favreau et al. (2013)
USA
 
  • Pennsylvania
    • Chester County
      • East Whiteland Township
    • Northampton County
      • Lower Saucon Township
        • Hellertown
Kampf et al. (2011) +1 other reference
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