Aerugite
A valid IMA mineral species - grandfathered
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About Aerugite
Formula:
Ni8.5(AsO4)2As5+O8
Colour:
Dark grass-green, blue-green, pale brown.
Lustre:
Sub-Adamantine, Sub-Vitreous, Resinous
Hardness:
4
Specific Gravity:
5.85
Crystal System:
Trigonal
Name:
Named by Gilbert-Joseph Adam in 1869 from 'aerugo', which means 'copper rust', alluding to its appearance.
Type Locality:
This page provides mineralogical data about Aerugite.
Unique Identifiers
IMA Classification of Aerugite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Ni8.5(AsO4)2As5+O8
First published:
1858
Type description reference:
Classification of Aerugite
8.BC.15
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
C : With only medium-sized cations, (OH, etc.):RO4 > 1:1 and < 2:1
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
C : With only medium-sized cations, (OH, etc.):RO4 > 1:1 and < 2:1
41.3.11.
41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
3 : (AB)3(XO4)Zq
41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
3 : (AB)3(XO4)Zq
20.10.7
20 : Arsenates (also arsenates with phosphate, but without other anions)
10 : Arsenates of Co and Ni
20 : Arsenates (also arsenates with phosphate, but without other anions)
10 : Arsenates of Co and Ni
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 |
---|---|---|
Aru | 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 Aerugite
Sub-Adamantine, Sub-Vitreous, Resinous
Transparency:
Transparent
Colour:
Dark grass-green, blue-green, pale brown.
Streak:
Pale green, pale blue-green.
Hardness:
4 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Density:
5.85 g/cm3 (Measured) 5.772 g/cm3 (Calculated)
Chemistry of Aerugite
Mindat Formula:
Ni8.5(AsO4)2As5+O8
Elements listed:
Crystallography of Aerugite
Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
R3m
Setting:
R3m
Cell Parameters:
a = 5.9511(5) Å, c = 27.5676(20) Å
Ratio:
a:c = 1 : 4.632
Unit Cell V:
845.52 ų (Calculated from Unit Cell)
Z:
1
Morphology:
Fine-grained crystalline, massive, as crusts, to 2 mm thick.
Comment:
Formerly reported as isometric.
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0009828 | Aerugite | Fleet M E, Barbier J (1989) Structure of aerugite (Ni8.5As3O16) and interrelated arsenate and germanate structural series Acta Crystallographica B45 201-205 | 1989 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
9.19 Å | (60) |
5.05 Å | (60) |
3.76 Å | (80) |
2.86 Å | (60) |
2.49 Å | (60) |
2.33 Å | (70) |
1.06 Å | (100) |
1.485 Å | (30) |
Comments:
ICDD 18-873
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
47d : [Arsenates, antimonates, selenates, bismuthinates] | |
47h : [Near-surface oxidized, dehydrated minerals] |
Geological Setting:
A rare secondary mineral in hydrothermal Ni–As–U ore deposits.
Type Occurrence of Aerugite
Place of Conservation of Type Material:
Natural History Museum, London, England, 32590 and 1907,103.
Geological Setting of Type Material:
Oxidised vein in a nickel arsenic deposit.
Associated Minerals at Type Locality:
Reference:
Bergemann, C. (1858) Ueber einige Nickelerze.- Journal für praktische Chemie [1]: 75: 239-244.
Other Language Names for Aerugite
Common Associates
Associated Minerals Based on Photo Data:
4 photos of Aerugite associated with Xanthiosite | Ni3(AsO4)2 |
1 photo of Aerugite associated with Paganoite | NiBi(AsO4)O |
1 photo of Aerugite associated with Petewilliamsite | (Ni,Co)30(As2O7)15 |
1 photo of Aerugite associated with Niasite | Ni2+4.5(AsO4)3 |
Related Minerals - Strunz-mindat Grouping
8.BC. | Elaliite | (Fe2+8Fe3+)(PO4)O8 |
8.BC. | Elkinstantonite | Fe4(PO4)2O |
8.BC. | Manganrockbridgeite | Mn2+2Fe3+3(PO4)3(OH)4(H2O) |
8.BC.05 | Angelellite | Fe3+4(AsO4)2O3 |
8.BC.10 | Frondelite | Mn2+Fe3+4(PO4)3(OH)5 |
8.BC.10 | Rockbridgeite | Fe2+Fe3+4(PO4)3(OH)5 |
8.BC.10 | Plimerite | ZnFe3+4(PO4)3(OH)5 |
8.BC.10 | Ferrorockbridgeite | (Fe2+,Mn2+)2(Fe3+)3(PO4)3(OH)4(H2O) |
8.BC.10 | Ferrirockbridgeite | (Fe3+0.67◻0.33)2(Fe3+)3(PO4)3(OH)4(H2O) |
Fluorescence of Aerugite
Not fluorescent
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.
Internet Links for Aerugite
mindat.org URL:
https://www.mindat.org/min-36.html
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References for Aerugite
Reference List:
Roberts, Andrew C., Burns, Peter C., Gault, Robert A., Criddle, Alan J., Feinglos, Mark N., Stirling, John A.R. (2001) Paganoite, NiBi3+As5+O5, a new mineral from Johanngeorgenstadt, Saxony, Germany: description and crystal structure. European Journal of Mineralogy, 13 (1) 167-175 doi:10.1127/0935-1221/01/0013-0167
Localities for Aerugite
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).
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.
All localities listed without proper references should be considered as questionable.
Germany (TL) | |
| Bergemann (1858) +2 other references |
| Hajek (2010) |
Thalheim et al. (2006) | |
UK | |
| Davis et al. (1965) +1 other reference |
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Johanngeorgenstadt, Erzgebirgskreis, Saxony, Germany