Hydrombobomkulite
A valid IMA mineral species
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About Hydrombobomkulite
Formula:
(Ni,Cu)Al4((NO3)2,SO4)(OH)12 · 13-14H2O
Colour:
Sky-blue
Crystal System:
Monoclinic
Name:
Named for being the more hydrated phase of mbobomkulite.
Unique Identifiers
Mindat ID:
1981
Long-form identifier:
mindat:1:1:1981:7
IMA Classification of Hydrombobomkulite
Approved
IMA Formula:
(Ni,Cu)Al4(NO3,SO4)2(OH)12 · 14H2O
Approval year:
1979
First published:
1980
Classification of Hydrombobomkulite
5.ND.15
5 : CARBONATES (NITRATES)
N : NITRATES
D : With OH (etc.) and H2O
5 : CARBONATES (NITRATES)
N : NITRATES
D : With OH (etc.) and H2O
Dana 7th ed.:
19.2.4.2
19.1.4.2
19 : NITRATES CONTAINING HYDROXYL OR HALOGEN
1 : Anhydrous Nitrates Containing Hydroxyl or Halogen
19 : NITRATES CONTAINING HYDROXYL OR HALOGEN
1 : Anhydrous Nitrates Containing Hydroxyl or Halogen
13.12
13 : Nitrates
13 : Nitrates
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Hmbb | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Hydrombobomkulite
Transparency:
Translucent
Colour:
Sky-blue
Tenacity:
Fragile
Cleavage:
Perfect
{001}
{001}
Comment:
friable in aggregate
Optical Data of Hydrombobomkulite
Type:
Biaxial
Dispersion:
r > v strong
Chemistry of Hydrombobomkulite
Mindat Formula:
(Ni,Cu)Al4((NO3)2,SO4)(OH)12 · 13-14H2O
Element Weights:
Crystallography of Hydrombobomkulite
Crystal System:
Monoclinic
Cell Parameters:
a = 10.145 Å, b = 17.155 Å, c = 20.870 Å
β = 90.55°
β = 90.55°
Ratio:
a:b:c = 0.591 : 1 : 1.217
Unit Cell V:
3,631.99 ų (Calculated from Unit Cell)
Z:
8
Comment:
Point Group: n.d.; Space Group: n.d.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 10.45 Å | (100) |
| 5.229 Å | (50) |
| 3.485 Å | (30) |
| 2.489 Å | (15) |
| 6.233 Å | (10) |
| 4.899 Å | (10) |
| 4.172 Å | (10) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47b : [Sulfates and sulfites] | |
| 47c : [Carbonates, phosphates, borates, nitrates] |
Type Occurrence of Hydrombobomkulite
General Appearance of Type Material:
Sky-blue, friable nodules in a matrix of powdery allophane
Place of Conservation of Type Material:
Museum of the Geological Survey, Pretoria, South Africa
Geological Setting of Type Material:
Cave in dolomite below chert
Associated Minerals at Type Locality:
Synonyms of Hydrombobomkulite
Other Language Names for Hydrombobomkulite
Dutch:Hydrombobomkuliet
German:Hydrombobomkulit
Simplified Chinese:水硫硝镍铝石
Spanish:Hydrombobomkulita
Traditional Chinese:水硫硝鎳鋁石
Relationship of Hydrombobomkulite to other Species
Structurally related to group(s):
| Chalcoalumite Group | A group of metal(II)-Al-sulphates, with additional anions in some species. |
Related Minerals - Strunz-mindat Grouping
| 5.ND.05 | Likasite | Cu3(NO3)(OH)5 · 2H2O |
| 5.ND.10 | Mbobomkulite | (Ni,Cu)Al4((NO3)2,SO4)(OH)12 · 3H2O |
| 5.ND.20 | Sveite | (K3-x◻x)Al8(NO3)6O8Cl4 · nH2O |
| 5.ND.25 | Lislkirchnerite | Pb6Al(OH)8Cl2(NO3)5 · 2H2O |
Other Information
Notes:
When exposed to the atmosphere, it loses water and is entirely transformed into mbobomkulite within a few hours. This transformation seems to be irreversible.
Special Storage/
Display Requirements:
Display Requirements:
Must be kept in a humid environment.
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 Hydrombobomkulite
mindat.org URL:
https://www.mindat.org/min-1981.html
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References for Hydrombobomkulite
Reference List:
Localities for Hydrombobomkulite
Showing 2 localities.
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
South Africa (TL) | |
| Martini (1980) +1 other reference |
USA | |
| Vochten et al. (2001) |
Quick NavTopAbout HydrombobomkuliteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsStrunz-MindatOther InformationInternet Links References Localities Locality List
Mbobo Mkulu Cave, Mbombela, Mbombela Local Municipality, Ehlanzeni District Municipality, Mpumalanga, South Africa