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Auriacusite

Formula:
Fe
3+
 
Cu
2+
 
AsO
 
4
O
System:OrthorhombicColour:ochreous yellow
Hardness:3
Name:The name is derived from the Latin auri (golden yellow) and acus (needle), in reference to its colour and crystal morphology.
Isostructural with:Olivenite


Fe3+-O-analogue of zincolivenite.

Classification of Auriacusite

IMA status:Approved 2009
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:41.6.5.7

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

Type Locality:Black Pine Mine (Combination Mine; Black Pine Tailings; Black Pine Dump), Flint Creek Valley, John Long Mts, Philipsburg District (Flint Creek District), Granite Co., Montana, USA
Place of Conservation of Type Material:Natural History Museum of Los Angeles County and Canadian Museum of Nature
Year of Discovery:1993
Associated Minerals at type locality:
SegnititeBrochantiteMalachiteTetrahedriteQuartz
Pyrite

Physical Properties of Auriacusite

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

Crystallography of Auriacusite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Pnnm {P21/n 21/n 2/m}
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:
d-spacingIntensity
5.996 (44)
4.884 (100)
4.218 (69)
2.991 (92)
2.669 (74)
2.476 (85)
2.416 (83)

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°
Maximum Birefringence:δ = 0.080

Chart 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:
Fe
3+
 
Cu
2+
 
AsO
 
4
O
Essential elements:As, Cu, Fe, O
All elements listed in formula:As, Cu, Fe, O

Relationship of Auriacusite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.BB.05Amblygonite
LiAl[(F,OH)|PO
 
4
]
8.BB.05Montebrasite
LiAl[(OH,F)|PO
 
4
]
8.BB.05Tavorite
LiFe
3+
 
[OH|PO
 
4
]
8.BB.10Triplite
(Mn
2+
 
,Fe
2+
 
)
 
2
[(F,OH)|PO
 
4
]
8.BB.10Zwieselite
(Fe
2+
 
,Mn
2+
 
)
 
2
[F|PO
 
4
]
8.BB.15Sarkinite
Mn
2+
2
[OH|AsO
 
4
]
8.BB.15Triploidite
(Mn
2+
 
,Fe
2+
 
)
 
2
[OH|PO
 
4
]
8.BB.15Wagnerite
(Mg,Fe
2+
 
)
 
2
[F|PO
 
4
]
8.BB.15Wolfeite
(Fe
2+
 
,Mn
2+
 
)
 
2
[OH|PO
 
4
]
8.BB.15Stanĕkite
Fe
3+
 
(Mn
2+
 
,Fe
2+
 
,Mg)[O|PO
 
4
]
8.BB.15Joosteite
Mn
2+
 
(Mn
3+
 
,Fe
3+
 
)[PO
 
4
]O
8.BB.15Hydroxylwagnerite
Mg
 
2
[PO
 
4
](OH)
8.BB.20Holtedahlite
Mg
 
2
[OH|PO
 
4
]
8.BB.20Satterlyite
(Fe
2+
 
,Mg,Fe
3+
 
)
 
2
[(OH,O)|PO
 
4
]
8.BB.25Althausite
Mg
 
2
[(OH,F)|PO
 
4
]
8.BB.30Adamite
Zn
 
2
(AsO
 
4
)(OH)
8.BB.30Eveite
Mn
2+
2
[OH|AsO
 
4
]
8.BB.30Libethenite
Cu
 
2
[OH|PO
 
4
]
8.BB.30Olivenite
Cu
 
2
[OH|AsO
 
4
]
8.BB.30Zincolibethenite
CuZnPO
 
4
OH
8.BB.30Zincolivenite
CuZn(AsO
 
4
)(OH)
8.BB.35Paradamite
Zn
 
2
[OH|AsO
 
4
]
8.BB.35Tarbuttite
Zn
 
2
[OH|PO
 
4
]
8.BB.40Barbosalite
Fe
2+
 
Fe
3+
2
[OH|PO
 
4
]
 
2
8.BB.40Hentschelite
CuFe
3+
2
[OH|PO
 
4
]
 
2
8.BB.40Lazulite
(Mg,Fe
2+
 
)Al
 
2
[OH|PO
 
4
]
 
2
8.BB.40Scorzalite
(Fe
2+
 
,Mg)Al
 
2
[OH|PO
 
4
]
 
2
8.BB.40Wilhelmkleinite
ZnFe
3+
2
[OH|AsO
 
4
]
 
2
8.BB.45Trolleite
Al
 
4
[OH|PO
 
4
]
 
3
8.BB.50Namibite
Cu(BiO)
 
2
(VO
 
4
)(OH)
8.BB.55Phosphoellenbergerite
Mg
 
14
[(OH)
 
6
|(HPO
 
4
,CO
 
3
)
 
2
|(PO
 
4
)
 
6
]
8.BB.60Urusovite
Cu[AlAsO
 
5
]
8.BB.65Theoparacelsite
Cu
 
3
[(OH)
 
2
|As
 
2
O
 
7
]
8.BB.70Turanite
Cu
 
5
[(OH)
 
2
|VO
 
4
]
 
2
8.BB.75Stoiberite
Cu
 
5
[O
 
2
|(VO
 
4
)
 
2
]
8.BB.80Fingerite
Cu
 
11
[O
 
2
|(VO
 
4
)
 
6
]
8.BB.85Averievite
Cu
 
6
[O
 
2
|Cl
 
2
|(VO
 
4
)
 
2
]
8.BB.90Lipscombite
(Fe
2+
 
,Mn
2+
 
)Fe
3+
2
[OH|PO
 
4
]
 
2
8.BB.90Richellite
Ca
 
3
Fe
3+
10
[(OH,F)
 
3
|(PO
 
4
)
 
2
]
 
4
 · nH
 
2
O (not confirmed)
8.BB.90Zinclipscombite
ZnFe
3+
2
(PO
 
4
)
 
2
(OH)
 
2

Other Names for Auriacusite

Synonyms:
IMA2009-037
Other Languages:

Other Information

Health Warning: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. Auriacusite, Fe3+Cu2+AsO4O, the first M3+ member of the olivenite group, from the Black Pine mine, Montana, USA. Mineralogy and Petrology. doi: 10.1007/s00710-009-0089-7.

Internet Links for Auriacusite

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    Localities for Auriacusite

    Hide Locality List
    The 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. ? 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.
    USA
     
    • Montana
      • Granite Co.
        • Philipsburg District (Flint Creek District)
          • John Long Mts
            • Flint Creek Valley
    		IMA Approvals - August 2009
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 12th Nov 2009 23:21:50