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Aerugite

A valid IMA mineral species - grandfathered
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About AerugiteHide

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.
This page provides mineralogical data about Aerugite.


Unique IdentifiersHide

Mindat ID:
36
Long-form identifier:
mindat:1:1:36:5
GUID
(UUID V4):
3b47f766-d364-41e1-8ab7-94e164789adf

IMA Classification of AerugiteHide

Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Ni8.5(AsO4)2As5+O8
First published:
1858

Classification of AerugiteHide

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
41.3.11.

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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
AruIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of AerugiteHide

Sub-Adamantine, Sub-Vitreous, Resinous
Transparency:
Transparent
Colour:
Dark grass-green, blue-green, pale brown.
Streak:
Pale green, pale blue-green.
Hardness:
Tenacity:
Brittle
Cleavage:
None Observed
Density:
5.85 g/cm3 (Measured)    5.772 g/cm3 (Calculated)

Chemistry of AerugiteHide

Mindat Formula:
Ni8.5(AsO4)2As5+O8

Crystallography of AerugiteHide

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 StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0009828AerugiteFleet M E, Barbier J (1989) Structure of aerugite (Ni8.5As3O16) and interrelated arsenate and germanate structural series Acta Crystallographica B45 201-20519890293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
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 EnvironmentHide

Paragenetic Mode(s):
Geological Setting:
A rare secondary mineral in hydrothermal Ni–As–U ore deposits.

Type Occurrence of AerugiteHide

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 AerugiteHide

Dutch:Aerugiet
French:Aerugite
German:Aerugit
Italian:Aerugite
Simplified Chinese:块砷镍矿
Traditional Chinese:塊砷鎳礦

Common AssociatesHide

Associated Minerals Based on Photo Data:
4 photos of Aerugite associated with XanthiositeNi3(AsO4)2
1 photo of Aerugite associated with PaganoiteNiBi(AsO4)O
1 photo of Aerugite associated with Petewilliamsite(Ni,Co)30(As2O7)15
1 photo of Aerugite associated with NiasiteNi2+4.5(AsO4)3

Related Minerals - Strunz-mindat GroupingHide

8.BC.Elaliite(Fe2+8Fe3+)(PO4)O8Orth. mmm (2/m 2/m 2/m) : Cmmm
8.BC.ElkinstantoniteFe4(PO4)2OMon. 2/m : P21/b
8.BC.ManganrockbridgeiteMn2+2Fe3+3(PO4)3(OH)4(H2O)Mon. 2/m : P21/m
8.BC.05AngelelliteFe3+4(AsO4)2O3Tric. 1 : P1
8.BC.10FrondeliteMn2+Fe3+4(PO4)3(OH)5Orth. 2 2 2 : C2 2 21
8.BC.10RockbridgeiteFe2+Fe3+4(PO4)3(OH)5Orth. mmm (2/m 2/m 2/m)
8.BC.10PlimeriteZnFe3+4(PO4)3(OH)5Orth. mmm (2/m 2/m 2/m)
8.BC.10Ferrorockbridgeite(Fe2+,Mn2+)2(Fe3+)3(PO4)3(OH)4(H2O)Orth. mmm (2/m 2/m 2/m)
8.BC.10Ferrirockbridgeite(Fe3+0.670.33)2(Fe3+)3(PO4)3(OH)4(H2O)Orth. mmm (2/m 2/m 2/m)

Fluorescence of AerugiteHide

Not fluorescent

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.

Internet Links for AerugiteHide

References for AerugiteHide

Localities for AerugiteHide

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 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.
Germany (TL)
 
  • Saxony
    • Erzgebirgskreis
Bergemann (1858) +2 other references
      • Marienberg
        • Lauta
Hajek (2010)
Thalheim et al. (2006)
UK
 
  • England
    • Cornwall
      • St Stephen-in-Brannel
Davis et al. (1965) +1 other reference
 
Mineral and/or Locality  
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