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Auriacusite

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Formula:
Fe3+Cu2+(AsO4)O
System:
Orthorhombic
Colour:
ochreous yellow
Lustre:
Silky
Hardness:
3
Member of:
Name:
The name is derived from the Latin auri (golden yellow) and acus (needle), in reference to its colour and crystal morphology.
Isostructural with:
Fe3+-O-analogue of zincolivenite.


Classification of Auriacusite

Approved
Approval Year:
2009
8.BB.30

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
B : With only medium-sized cations, (OH, etc.):RO4 about 1:1
41.6.5.7

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
6 : A2(XO4)Zq

Physical Properties of Auriacusite

Silky
Diaphaneity (Transparency):
Transparent
Colour:
ochreous yellow
Streak:
brownish yellow
Hardness (Mohs):
3
Hardness Data:
Estimated
Tenacity:
Brittle
Fracture:
Irregular/Uneven
Density:
4.447 g/cm3 (Calculated)

Optical Data of Auriacusite

Type:
Biaxial (+)
RI values:
nα = 1.830(5) nβ = 1.865(5) nγ = 1.910(5)
2V:
Measured: 83° (3), Calculated: 84.6°
Max Birefringence:
δ = 0.080
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High
Pleochroism:
Non-pleochroic

Chemical Properties of Auriacusite

Formula:
Fe3+Cu2+(AsO4)O
IMA Formula:
Fe3+Cu2+AsO4O
Elements listed in formula:

Crystallography of Auriacusite

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pnnm
Cell Parameters:
a = 8.6235(7) Å, b = 8.275(7) Å, c = 5.9501(5) Å
Ratio:
a:b:c = 1.042 : 1 : 0.719
Unit Cell Volume:
V 424.63 ų
Z:
4
X-Ray Powder Diffraction Data:
d-spacingIntensity
5.996 (44)
4.884 (100)
4.218 (69)
2.991 (92)
2.669 (74)
2.476 (85)
2.416 (83)
1.582 (54)

Type Occurrence of Auriacusite

Place of Conservation of Type Material:
Natural History Museum of Los Angeles County and Canadian Museum of Nature
Associated Minerals at Type Locality:

Relationship of Auriacusite to other Species

Member of:
Other Members of Group:
AdamiteZn2(AsO4)(OH)
EveiteMn22+(AsO4)(OH)
LibetheniteCu2(PO4)(OH)
OliveniteCu2(AsO4)(OH)
ZincolibetheniteCuZn(PO4)(OH)
ZincoliveniteCuZn(AsO4)(OH)
8.BB.XArsenowagneriteMg2(AsO4)F
8.BB.05AmblygoniteLiAl(PO4)F
8.BB.05MontebrasiteLiAl(PO4)(OH)
8.BB.05TavoriteLiFe3+(PO4)(OH)
8.BB.10Triplite(Mn2+,Fe2+)2(PO4)(F,OH)
8.BB.10Zwieselite(Fe2+,Mn2+)2(PO4)F
8.BB.15SarkiniteMn22+(AsO4)(OH)
8.BB.15Triploidite(Mn2+,Fe2+)2(PO4)(OH)
8.BB.15Wagnerite(Mg,Fe2+)2(PO4)F
8.BB.15Wolfeite(Fe2+,Mn2+)2(PO4)(OH)
8.BB.15Stanĕkite(Mn2+,Fe2+,Mg)Fe3+(PO4)O
8.BB.15JoosteiteMn2+(Mn3+,Fe3+)(PO4)O
8.BB.15HydroxylwagneriteMg2(PO4)(OH)
8.BB.20HoltedahliteMg2(PO4)(OH)
8.BB.20Satterlyite(Fe2+,Mg,Fe)12(PO4)5(PO3OH)(OH,O)6
8.BB.25AlthausiteMg4(PO4)2(OH,O)(F,☐)
8.BB.30AdamiteZn2(AsO4)(OH)
8.BB.30EveiteMn22+(AsO4)(OH)
8.BB.30LibetheniteCu2(PO4)(OH)
8.BB.30OliveniteCu2(AsO4)(OH)
8.BB.30ZincolibetheniteCuZn(PO4)(OH)
8.BB.30ZincoliveniteCuZn(AsO4)(OH)
8.BB.35ParadamiteZn2(AsO4)(OH)
8.BB.35TarbuttiteZn2(PO4)(OH)
8.BB.40BarbosaliteFe2+Fe23+(PO4)2(OH)2
8.BB.40HentscheliteCuFe23+(PO4)2(OH)2
8.BB.40Lazulite(Mg,Fe2+)Al2(PO4)2(OH)2
8.BB.40ScorzaliteFe2+Al2(PO4)2(OH)2
8.BB.40WilhelmkleiniteZnFe23+(AsO4)2(OH)2
8.BB.45TrolleiteAl4(PO4)3(OH)3
8.BB.50NamibiteCu(BiO)2(VO4)(OH)
8.BB.55Phosphoellenbergerite(Mg,◻)2Mg12(PO4,PO3OH)6(PO3OH,CO3)2(OH)6
8.BB.60UrusoviteCuAl(AsO4)O
8.BB.65TheoparacelsiteCu3(As2O7)(OH)2
8.BB.70TuraniteCu5(VO4)2(OH)4
8.BB.75StoiberiteCu5(VO4)2O2
8.BB.80FingeriteCu11(VO4)6O2
8.BB.85AverieviteCu6(VO4)2O2Cl2
8.BB.90LipscombiteFe2+Fe23+(PO4)2(OH)2
8.BB.90RichelliteCaFe23+(PO4)2(OH,F)2
8.BB.90ZinclipscombiteZnFe23+(PO4)2(OH)2

Other Names for Auriacusite

Name in Other Languages:

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 Auriacusite

Reference List:
IMA Approvals - August 2009

Mills, S. J., Kampf, A. R., Raudsepp, M. & Poirier, G. (2009) New Fe-bearing members of the olivenite group from the Black Pine mine, Montana, Geological Society of America Abstracts with Programs, 41(7), 100.


Mills, S. J., Kampf, A. R., Poirier, G., Raudsepp, M. & Steele, I. M. (2010) Auriacusite, Fe3+Cu2+AsO4O, the first M3+ member of the olivenite group, from the Black Pine mine, Montana, USA. Mineralogy and Petrology, 99(1-2), 113–120.

Internet Links for Auriacusite

mindat.org URL:
https://www.mindat.org/min-39638.html
Please feel free to link to this page.

Localities for Auriacusite

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.
(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.
Spain
 
  • Andalusia
    • Almería
      • Huércal-Overa
        • Cuesta Alta
          • Cerro Minado Mines
FAVREAU et al. (2013)
UK
 
  • England
    • Cornwall
      • St Agnes District
        • Perranzabuloe
Stuart Mills (Museum Victoria) & Nicolas Meisser (Lausanne); Weiß, S., Merry, M. & Ansermet, S. (2017): Neufunde aus Cornwall: Cannonit, Arthurit, Auriacusit. Lapis, 42 (1), 20-23; 62 (in German).
USA (TL)
 
  • Montana
    • Granite Co.
      • Philipsburg District (Flint Creek District)
        • John Long Mts
          • Black Pine Ridge
IMA Approvals - August 2009; Gobla, M. J. (2012) Montana Mineral Locality Index. Rocks and Minerals 87:208-240.
Mineral and/or Locality  
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