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General Mbobomkulite Information |
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 Chemical Formula: |
(Ni,Cu)Al4(NO3,SO4)2(OH)12•3(H2O) | ||
| Composition: |
Molecular Weight = 567.00 gm | ||
| Aluminum 19.03 % Al 35.96 % Al2O3 | |||
| Copper 2.80 % Cu 3.15 % Cu2O | |||
| Nickel 7.76 % Ni 9.88 % NiO | |||
| Hydrogen 3.20 % H 28.60 % H2O | |||
| Sulfur 2.83 % S 7.06 % SO3 | |||
| Nitrogen 3.71 % N 14.29 % N2O5 | |||
| Oxygen 60.67 % O | |||
| ______ ______ | |||
| 100.00 % 98.94 % = TOTAL OXIDE | |||
| Empirical Formula: |
Ni0.75Cu0.25Al4(NO3)1.5(SO4)0.5(OH)12•3(H2O) | ||
| Environment: |
Friable nodules in allophane after rapid dehydration from hydrombobomkulite. | ||
| IMA Status: |
Approved IMA 1980 | ||
| Locality: |
Mbobo Mkulu cave, Nelspruit district, South Africa. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for the locality. | ||
| Name Pronunciation: |
Mbobomkulite + Pronunciation  |
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Mbobomkulite Image | |||
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Images:
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Mbobomkulite Crystallography |
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| Axial Ratios: |
a:b:c =1.1473:1:1.934 | ||
| Cell Dimensions: |
a = 10.171, b = 8.865, c = 17.145, Z = 4; beta = 95.37° V = 1,539.11 Den(Calc)= 2.45 | ||
| Crystal System: |
Monoclinic - SphenoidalH-M Symbol (2) Space Group: P 21 | ||
| X Ray Diffraction: |
By Intensity(I/Io): 8.55(1), 4.27(0.4), 7.87(0.15), | ||
Physical Properties of Mbobomkulite |
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| Cleavage: |
{001} Perfect | ||
| Color: |
Sky blue. | ||
| Density: |
2.3 | ||
| Habit: |
Nodular - Tuberose forms having irregular protuberances over the surface. | ||
| Habit: |
Powdery - Forms a loose, poorly-coherent pulverulent mass. | ||
| Streak: |
light blue | ||
Optical Properties of Mbobomkulite |
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| Gladstone-Dale: |
CI meas= 0.018 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.078 (Fair) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2245,KPDmeas= 0.2391,KC= 0.2435 Ncalc = 1.56 - 1.6 |
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| Optical Data: |
Biaxial (?), a=1.515, g=1.585, bire=0.0700 | ||
Calculated Properties of Mbobomkulite |
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| Electron Density: |
Bulk Density (Electron Density)=2.34 gm/cc note: Specific Gravity of Mbobomkulite =2.30 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.03 Boson Index = 0.97 |
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| Photoelectric: |
PEMbobomkulite = 4.99 barns/electron U=PEMbobomkulite x rElectron Density= 11.68 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Mbobomkulite is Not Radioactive |
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Mbobomkulite Classification |
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| Dana Class: |
19.01.04.01 (19)Nitrates - Hydroxyl or Halogen | ||
| (19.01)with miscellaneous formulae | |||
| (19.01.04)Mbobomkulite Group | |||
| Strunz Class: |
05.ND.10 05 - CARBONATES (NITRATES) | ||
| 05.N - NITRATES | |||
| 05.ND -With OH (etc.) and H2O | |||
Other Mbobomkulite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Mbobomkulite : 1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - GeoScienceWorld 6 - Google Images 7 - Google Scholar 8 - Handbook of Mineralogy (MinSocAm) 9 - MinDAT 10 - Mineralienatlas (Deutsch) 11 - Online Mineral Museum 12 - QUT Mineral Atlas 13 - Ruff.Info Search for Mbobomkulite using: Visit our Advertisers for Mbobomkulite : A Bijoux Google Search for MbobomkuliteAdam's Minerals Google Search for Mbobomkulite Cape Minerals Google Search for Mbobomkulite Dakota Matrix Minerals Google Search for Mbobomkulite Excalibur Mineral Corp. Google Search for Mbobomkulite Exceptional Minerals Google Search for Mbobomkulite John Betts Fine Minerals Search for Mbobomkulite McDougall Minerals Google Search for Mbobomkulite Mineral News Website Link Rock and Mineral Shows Google Search for Mbobomkulite Weinrich Minerals, Inc. Google Search for Mbobomkulite Ask about Mbobomkulite here : Print or Cut-and-Paste your Mbobomkulite Specimen Label here :
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