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Mbobomkulite

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

Classification of Mbobomkulite

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 Mbobomkulite

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 Mbobomkulite

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

Crystallography of Mbobomkulite

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 Volume:
V 1,537.64 ų (Calculated from Unit Cell)

Type Occurrence of Mbobomkulite

Relationship of Mbobomkulite to other Species

Other Members of Group:
ChalcoalumiteCuAl4(SO4)(OH)12 · 3H2O
KyrgyzstaniteZnAl4(SO4)(OH)12·3H2O
Nickelalumite(Ni,Cu)Al4(SO4,(NO3)2)(OH)12 · 3H2O
5.ND.05LikasiteCu3NO3(OH)5 · 2H2O
5.ND.15Hydrombobomkulite(Ni,Cu)Al4(NO3)2(SO4)(OH)12 · 14H2O
5.ND.20SveiteKAl7(NO3)4(OH)16Cl2 · 8H2O
13.1NitratineNaNO3
13.2NiterKNO3
13.3GerhardtiteCu2NO3(OH)3
13.4NitromagnesiteMg(NO3)2 · 6H2O
13.5NitrocalciteCa(NO3)2 · 4H2O
13.6NitrobariteBa(NO3)2
13.7ButtgenbachiteCu36(NO3)2Cl6(OH)64 · nH2O
13.8SveiteKAl7(NO3)4(OH)16Cl2 · 8H2O
13.9DarapskiteNa3(SO4)(NO3) · H2O
13.10HumberstoniteK3Na7Mg2(SO4)6(NO3)2 · 6H2O
13.12Hydrombobomkulite(Ni,Cu)Al4(NO3)2(SO4)(OH)12 · 14H2O
13.13Nickelalumite(Ni,Cu)Al4(SO4,(NO3)2)(OH)12 · 3H2O
19.2.4.2Hydrombobomkulite(Ni,Cu)Al4(NO3)2(SO4)(OH)12 · 14H2O

Other Names for Mbobomkulite

Name in Other Languages:
Simplified Chinese:硫硝镍铝石
Spanish:Mbobomkulita
Traditional Chinese:硫硝鎳鋁石

Other Information

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 Mbobomkulite

Reference List:
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 Mbobomkulite

mindat.org URL:
https://www.mindat.org/min-2608.html
Please feel free to link to this page.

Localities for Mbobomkulite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
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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