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Mbobomkulite

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Formula:
(Ni,Cu)Al4((NO3)2,SO4)(OH)12 · 3H2O
Crystal System:
Monoclinic
Name:
For the type locality, the Mbobo Mkulu cave.
Hide all sections | Show all sections

Classification of MbobomkuliteHide

Approved
Approval Year:
1979
5.ND.10

5 : CARBONATES (NITRATES)
N : NITRATES
D : With OH (etc.) and H2O
Dana 7th ed.:
19.2.4.1
19.1.4.1

19 : NITRATES CONTAINING HYDROXYL OR HALOGEN
1 : Anhydrous Nitrates Containing Hydroxyl or Halogen
13.11

13 : Nitrates

Optical Data of MbobomkuliteHide

Type:
Biaxial
RI values:
nα = 1.515 nγ = 1.585
Max Birefringence:
δ = 0.070
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
relatively weak

Chemical Properties of MbobomkuliteHide

Formula:
(Ni,Cu)Al4((NO3)2,SO4)(OH)12 · 3H2O
IMA Formula:
(Ni,Cu)Al4(NO3,SO4)2(OH)12 · 3H2O
Idealised Formula:
NiAl4(NO3)2(OH)12 · 3H2O

Crystallography of MbobomkuliteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 10.17 Å, b = 8.86 Å, c = 17.14 Å
β = 95.37°
Ratio:
a:b:c = 1.148 : 1 : 1.935
Unit Cell V:
1,537.64 ų (Calculated from Unit Cell)

Type Occurrence of MbobomkuliteHide

Synonyms of MbobomkuliteHide

Other Language Names for MbobomkuliteHide

Simplified Chinese:硫硝镍铝石
Spanish:Mbobomkulita
Traditional Chinese:硫硝鎳鋁石

Relationship of Mbobomkulite to other SpeciesHide

Other Members of this group:
ChalcoalumiteCuAl4(SO4)(OH)12 · 3H2OMon. 2 : P21
KyrgyzstaniteZnAl4(SO4)(OH)12·3H2OMon.
Nickelalumite(Ni,Cu)Al4(SO4,(NO3)2)(OH)12 · 3H2OMon.

Related Minerals - Nickel-Strunz GroupingHide

5.ND.05LikasiteCu3(NO3)(OH)5 · 2H2OOrth. mmm (2/m 2/m 2/m)
5.ND.15Hydrombobomkulite(Ni,Cu)Al4((NO3)2,SO4)(OH)12 · 13-14H2OMon.
5.ND.20SveiteKAl7(NO3)4(OH)16Cl2 · 8H2OMon.

Related Minerals - Dana Grouping (8th Ed.)Hide

19.1.4.2Hydrombobomkulite(Ni,Cu)Al4((NO3)2,SO4)(OH)12 · 13-14H2OMon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

13.1NitratineNaNO3Trig. 3m (3 2/m) : R3c
13.2NiterKNO3Orth. mmm (2/m 2/m 2/m) : Pmma
13.3GerhardtiteCu2(NO3)(OH)3Orth. 2 2 2 : P21 21 21
13.4NitromagnesiteMg(NO3)2 · 6H2OMon. 2/m
13.5NitrocalciteCa(NO3)2 · 4H2OMon. 2/m
13.6NitrobariteBa(NO3)2Iso. m3 (2/m 3) : Pa3
13.7ButtgenbachiteCu19(NO3)2(OH)32Cl4 · 2H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
13.8SveiteKAl7(NO3)4(OH)16Cl2 · 8H2OMon.
13.9DarapskiteNa3(SO4)(NO3) · H2OMon. 2/m
13.10HumberstoniteNa7K3Mg2(SO4)6(NO3)2 · 6H2OTrig. 3 : R3
13.12Hydrombobomkulite(Ni,Cu)Al4((NO3)2,SO4)(OH)12 · 13-14H2OMon.
13.13Nickelalumite(Ni,Cu)Al4(SO4,(NO3)2)(OH)12 · 3H2OMon.

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.

References for MbobomkuliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Martini, J.E.J. (1980) Mbobomkulite, hydrombobomkulite, and nickelalumite, new minerals from Mbobo Mkulu cave, eastern Transvaal. Annals of the Geological Survey of South Africa: 14(2): 1-110 (see: American Mineralogist (1982): 67: 415-416).
American Mineralogist (1982) 67: 415-416).

Internet Links for MbobomkuliteHide

Localities for MbobomkuliteHide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
South Africa (TL)
 
  • Mpumalanga Province
    • Ehlanzeni District
      • Nelspruit
Ann.Geol.Surv.S.Africa,(1980) 14, n2, 1-110; Martini, J.E.J. et al (1997), "Mbobo Mkulu Cave, South Africa", in "Cave Minerals of the World" (1997)
USA
 
  • Utah
    • San Juan Co.
      • White Canyon District
        • White Canyon
Canadian Mineralogist: (2001) 39( 6): 1685-1689.
Mineral and/or Locality  
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