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Auriacusite

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Big Photo

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
© NHMLAC

Show Auriacusite Photos (5)



Formula:
Fe
3+
 
Cu
2+
 
(AsO
 
4
)O
System:OrthorhombicColour:ochreous yellow
Hardness:3
Member of:Olivenite Group
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:
TetrahedriteSegnititeQuartzPyriteMalachite
Brochantite

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)
1.582 (54)

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

Member of:Olivenite Group
Other Members of Group:

- +
Adamite
Zn
 
2
(AsO
 
4
)(OH)
Eveite
Mn
2+
2
(AsO
 
4
)(OH)
Libethenite
Cu
 
2
(PO
 
4
)(OH)
Olivenite
Cu
 
2
(AsO
 
4
)(OH)
Paradamite
Zn
 
2
(AsO
 
4
)(OH)
Tarbuttite
Zn
 
2
(PO
 
4
)(OH)
Zincolivenite
CuZn(AsO
 
4
)(OH)
Related Minerals - Nickel-Strunz Grouping):

- +
8.BB.05Amblygonite
LiAl(PO
 
4
)F
8.BB.05Montebrasite
LiAl(PO
 
4
)(OH)
8.BB.05Tavorite
LiFe
3+
 
(PO
 
4
)(OH)
8.BB.10Triplite
(Mn
2+
 
,Fe
2+
 
)
 
2
(PO
 
4
)(F,OH)
8.BB.10Zwieselite
Fe
2+
 
Mn
2+
 
(PO
 
4
)F
8.BB.15Sarkinite
Mn
2+
2
(AsO
 
4
)(OH)
8.BB.15Triploidite
(Mn
2+
 
,Fe
2+
 
)
 
2
(PO
 
4
)(OH)
8.BB.15Wagnerite
(Mg,Fe
2+
 
)
 
2
(PO
 
4
)F
8.BB.15Wolfeite
(Fe
2+
 
,Mn
2+
 
)
 
2
(PO
 
4
)(OH)
8.BB.15Stanĕkite
(Mn
2+
 
,Fe
2+
 
,Mg)Fe
3+
 
(PO
 
4
)O
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
(PO
 
4
)(OH)
8.BB.20Satterlyite
(Fe
2+
 
,Mg,Fe
3+
 
)
 
2
(PO
 
4
)(OH,O)
8.BB.25Althausite
Mg
 
2
(PO
 
4
)(OH,F)
8.BB.30Adamite
Zn
 
2
(AsO
 
4
)(OH)
8.BB.30Eveite
Mn
2+
2
(AsO
 
4
)(OH)
8.BB.30Libethenite
Cu
 
2
(PO
 
4
)(OH)
8.BB.30Olivenite
Cu
 
2
(AsO
 
4
)(OH)
8.BB.30Zincolibethenite
CuZn(PO
 
4
)(OH)
8.BB.30Zincolivenite
CuZn(AsO
 
4
)(OH)
8.BB.35Paradamite
Zn
 
2
(AsO
 
4
)(OH)
8.BB.35Tarbuttite
Zn
 
2
(PO
 
4
)(OH)
8.BB.40Barbosalite
Fe
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
8.BB.40Hentschelite
CuFe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
8.BB.40Lazulite
(Mg,Fe
2+
 
)Al
 
2
(PO
 
4
)
 
2
(OH)
 
2
8.BB.40Scorzalite
Fe
2+
 
Al
 
2
(PO
 
4
)
 
2
(OH)
 
2
8.BB.40Wilhelmkleinite
ZnFe
3+
2
(AsO
 
4
)
 
2
(OH)
 
2
8.BB.45Trolleite
Al
 
4
(PO
 
4
)
 
3
(OH)
 
3
8.BB.50Namibite
Cu(BiO)
 
2
(VO
 
4
)(OH)
8.BB.55Phosphoellenbergerite
Mg
 
14
(PO
 
4
)
 
6
(HPO
 
4
,CO
 
3
)
 
2
(OH)
 
6
8.BB.60Urusovite
CuAl(AsO
 
4
)O
8.BB.65Theoparacelsite
Cu
 
3
(As
 
2
O
 
7
)(OH)
 
2
8.BB.70Turanite
Cu
 
5
(VO
 
4
)
 
2
(OH)
 
2
8.BB.75Stoiberite
Cu
 
5
(VO
 
4
)
 
2
O
 
2
8.BB.80Fingerite
Cu
 
11
(VO
 
4
)
 
6
O
 
2
8.BB.85Averievite
Cu
 
6
(VO
 
4
)
 
2
O
 
2
Cl
 
2
8.BB.90Lipscombite
(Fe
2+
 
,Mn
2+
 
)Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
8.BB.90Richellite
CaFe
3+
2
(PO
 
4
)
 
2
(OH,F)
 
2
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. (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

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    • Localities for Auriacusite

    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.
    Hide Locality List
    (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.
    Spain
     
    • Andalusia
      • Almería
        • Huercal-Overa
    		Jean-Robert & Christiane Eytier collection
    USA
     
    • Montana
      • Granite Co.
        • Philipsburg District (Flint Creek District)
          • John Long Mts
            • Flint Creek Valley
    		IMA Approvals - August 2009
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