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Algodonite

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Formula:
(Cu
 
1-x
As
 
x
)
(x ≈ 0.15)
System:HexagonalColour:Steel-gray to ...
Lustre:MetallicHardness:4
Name:Named after its discovery locality in Chile.
This page provides mineralogical data about Algodonite.

Classification of Algodonite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered" 1857
Strunz 8th edition ID:2/A.01-10
Nickel-Strunz 10th (pending) edition ID:2.AA.10a

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
A : Alloys
A : Alloys of metalloids with Cu, Ag, Au
Dana 8th edition ID:2.1.1.1

2 : SULFIDES
1 : AmXp, with m:p > 3:1
Hey's CIM Ref.:1.38

1 : Elements and Alloys (including the arsenides, antimonides and bismuthides of Cu, Ag and Au)
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Type Occurrence of Algodonite

Type Locality:Los Algodones Mine, Los Algodones district, El Arrayan, La Serena, Elqui Province, Coquimbo Region, Chile
Year of Discovery:1857

Occurrences of Algodonite

Geological Setting:Uncommon in hydrothermal deposits, intimately associated with other copper arsenides.

Physical Properties of Algodonite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Comment:Bright metallic
Colour:Steel-gray to silver-white, tarnishes dull on exposure
Comment:in polished section, bright cream-white
Hardness (Mohs):4
Hardness (Vickers):VHN100=245 - 302 kg/mm2
Fracture:Sub-Conchoidal
Density (measured):8.38 g/cm3
Density (calculated):8.72 g/cm3

Crystallography of Algodonite

Crystal System:Hexagonal
Class (H-M):6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Space Group:P63/mmc
Space Group Setting:P63/mmc
Cell Parameters:a = 2.600Å, c = 4.228Å
Ratio:a:c = 1 : 1.626
Unit Cell Volume:V 24.75 ų (Calculated from Unit Cell)
Z:2
Morphology:As incrustations of minute highly distorted crystals; commonly massive and granular.
X-Ray Powder Diffraction:
d-spacingIntensity
2.25 (20)
2.11 (40)
1.989 (100)
1.299 (20)
1.194 (20)
1.110 (20)
0.837 (20)
0.823 (20)
Comments:Mohawk mine, Keweenaw Co., Michigan, USA (ICDD 9-429).

Optical Data of Algodonite

Type:Anisotropic
Anisotropism:Weak
Reflectivity:
400nmR1=51.5%R2= 49.3%
420nmR1=52.3%R2= 50.5%
440nmR1=52.8%R2= 52.4%
460nmR1=53.4%R2= 54.6%
480nmR1=54.2%R2= 56.4%
500nmR1=55.7%R2= 58.4%
520nmR1=57.5%R2= 60.5%
540nmR1=58.9%R2= 62.3%
560nmR1=60.0%R2= 63.8%
580nmR1=60.8%R2= 64.8%
600nmR1=61.1%R2= 65.5%
620nmR1=61.6%R2= 66.1%
640nmR1=61.9%R2= 66.5%
660nmR1=62.3%R2= 66.7%
680nmR1=62.8%R2= 66.9%
700nmR1=63.4%R2= 67.1%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 67.1%.
R1 shown in black, R2 shown in red
Colour in reflected light:Bright cream-white

Chemical Properties of Algodonite

Formula:
(Cu
 
1-x
As
 
x
)


(x ≈ 0.15)
Simplified for copy/paste:(Cu1-xAsx)
Essential elements:As, Cu
All elements listed in formula:As, Cu
Common Impurities:Ag

Relationship of Algodonite to other Species

Common Associates:
SilverKoutekiteDomeykiteCopper
Related Minerals - Nickel-Strunz Grouping):

- +
2.AA.10bDomeykite
Cu
 
3
As
2.AA.10dKoutekite
Cu
 
5
As
 
2
2.AA.15Novakite
Cu
 
20
AgAs
 
10
2.AA.20Cuprostibite
Cu
 
2
(Sb,Tl)
2.AA.25Kutinaite
Ag
 
6
Cu
 
14
As
 
7
2.AA.30Allargentum
(Ag
 
1-x
Sb
 
x
)
2.AA.35Dyscrasite
Ag
 
3
Sb
2.AA.40Maldonite
Au
 
2
Bi
2.AA.45Stistaite
SnSb
Related Minerals - Hey's Index Grouping:

- +
1.1Copper
Cu
1.2Silver
Ag
1.5Gold
Au
1.6Auricupride
Cu
 
3
Au
1.7Tetra-auricupride
AuCu
1.8Zinc
Zn
1.9Cadmium
Cd
1.10Danbaite
CuZn
 
2
1.11Zhanghengite
CuZn
1.12Mercury
Hg
1.13Kolymite
Cu
 
7
Hg
 
6
1.14Moschellandsbergite
Ag
 
2
Hg
 
3
1.15Eugenite
Ag
 
11
Hg
 
2
1.16Schachnerite
Ag
 
1.1
Hg
 
0.9
1.17Paraschachnerite
Ag
 
3
Hg
 
2
1.18Luanheite
Ag
 
3
Hg
1.19Weishanite
(Au,Ag)
 
3
Hg
 
2
1.20Indium
In
1.21Aluminium
Al
1.22Khatyrkite
(Cu,Zn)Al
 
2
1.23Cupalite
(Cu,Zn)Al
1.24Diamond
C
1.25Graphite
C
1.26Chaoite
C
1.27Lonsdaleite
C
1.28Silicon
Si
1.29Tin
Sn
1.30Lead
Pb
1.31Anyuiite
Au(Pb,Sb)
 
2
1.31Novodneprite
AuPb
 
3
1.32Leadamalgam
Pb
 
0.7
Hg
 
0.3
1.33Arsenic
As
1.34Arsenolamprite
As
1.35Paxite
CuAs
 
2
1.36Koutekite
Cu
 
5
As
 
2
1.37Domeykite
Cu
 
3
As
1.39Novakite
Cu
 
20
AgAs
 
10
1.40Kutinaite
Ag
 
6
Cu
 
14
As
 
7
1.41Antimony
Sb
1.42Stibarsen
AsSb
1.43Paradocrasite
Sb
 
3
As
1.44Horsfordite
Cu, Sb
1.45Cuprostibite
Cu
 
2
(Sb,Tl)
1.46Allargentum
(Ag
 
1-x
Sb
 
x
)
1.47Aurostibite
AuSb
 
2
1.48Dyscrasite
Ag
 
3
Sb
1.49Bismuth
Bi
1.50Maldonite
Au
 
2
Bi
1.51Sulphur
S
 
8
1.52Rosickýite
S
1.53Selenium
Se
1.54Tellurium
Te
1.55Chromium
Cr
1.56Rhenium
Re
1.57Iron
Fe
1.58Chromferide
Fe
 
3
Cr
 
1-x
(x=0.6)
1.59Ferchromide
Cr
 
3
Fe
 
1-x
1.60Wairauite
CoFe
1.61Nickel
Ni
1.62Kamacite
(Fe,Ni)
1.63Taenite
(Fe,Ni)
1.64Tetrataenite
FeNi
1.65Awaruite
Ni
 
3
Fe
1.66Palladium
(Pd,Pt)
1.67Potarite
PdHg
1.68Paolovite
Pd
 
2
Sn
1.69Stannopalladinite
(Pd,Cu)
 
3
Sn
 
2
1.70Cabriite
Pd
 
2
CuSn
1.71Taimyrite-I
(Pd,Cu,Pt)
 
3
Sn
1.72Atokite
(Pd,Pt)
 
3
Sn
1.73Rustenburgite
(Pt,Pd)
 
3
Sn
1.74Zvyagintsevite
(Pd,Pt,Au)
 
3
(Pb,Sn)
1.75Plumbopalladinite
Pd
 
3
Pb
 
2
1.76Osmium
(Os,Ir,Ru)
1.77Iridium
(Ir,Os,Ru)
1.82Platinum
Pt
1.83Hongshiite
PtCu
1.84Niggliite
PtSn
1.85Isoferroplatinum
Pt
 
3
Fe
1.86Tetraferroplatinum
PtFe
1.87Tulameenite
Pt
 
2
CuFe
1.88Ferronickelplatinum
Pt
 
2
FeNi
1.89Rhodium
(Rh,Pt)

Other Names for Algodonite

Synonyms:
Algadonite
Other Languages:
German:Algadonit
Algodonit
Russian:Альгодонит
Simplified Chinese:微晶砷铜矿
Spanish:Algadonita
Algodonita
Varieties:
Argentoalgodonite

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 Algodonite

Reference List:

- +
Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged, 834pp.: 171.

Geological Society of America Memoir 85 (1962), 14.

Economic Geology 66 (1971), 133.

Materials Research Bulletin 7 (1972), 782.

Anthony, J.W., Bideaux, R.A., Bladh, K.W. and Nichols, M.C. (1990) Handbook of Mineralogy, Volume I. Elements, Sulfides, Sulfosalts. Mineral Data Publishing, Tucson, AZ, 588pp.: 8.

Internet Links for Algodonite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Algodonite details from Handbook of Mineralogy (PDF)
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  • Localities for Algodonite

    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.
    Argentina
     
    • Neuquén
    Las Especies Minerales de la Republica Argentina, Milka K. de Brodtkorb, Asociacion Mineralogica Argentina 2002
    Austria
     
    • Styria
      • Knittelfeld
        • Flatschach
          • Cu deposit (Schönberg)
    Paar, W. H. & Meixner, H. (1979): Neues aus den Kupfererzgängen des Flatschacher Bergbau-Reviers in Knittelfeld, Steiermark. - Karinthin 81, 148-150.
    Paar, W.H. & Meixner, H. (1979): Neues aus den Kupfererz-Gängen des Flatschacher Bergbau-Reviers bei Knittelfeld, Steiermark. Karinthin, 81: 148-150.
    Bolivia
     
    • La Paz Department
      • Pacajes Province
    [MinRec 32:469]
    Canada
     
    • Northwest Territories
      • Mackenzie District
        • Great Bear Lake
    Lang,A.H (1952) Canadian Deposits of Uranium and Thorium. Geological Survey of Canada. Economic Geology Series No.16, p.53
    Lang,A.H (1952) Canadian Deposits of Uranium and Thorium. Geological Survey of Canada. Economic Geology Series No.16
    Lang,A.H (1952) Canadian Deposits of Uranium and Thorium. Geological Survey of Canada. Economic Geology Series No.16, p.53
            • Eldorado Mine
    Lang,A.H (1952) Canadian Deposits of Uranium and Thorium. Geological Survey of Canada. Economic Geology Series No.16
    Chile
     
    • Coquimbo Region
      • Elqui Province
        • La Serena
          • El Arrayan
            • Los Algodones district
    [Economic Geology 66 (1971), 133]
    • Libertador General Bernardo O'Higgins Region
    AA. VV., 1996. Collezionare minerali. Hobby & Work.
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Hradec Králové Region
        • Náchod (Nachod)
    Černý, P., Doubek, Z., Veselovský, F.: Nerosty z Bělovsi u Náchoda – Jiráskova lomu. Minerál, roč. 11, č. 6, s. 406-418.
    France
     
    • Provence-Alpes-Côte d'Azur
      • Alpes-Maritimes
        • Guillaumes
          • Daluis
    R. Pierrot, P. Picot, J. Feraud, J. Vernet : "Inventaire Minéralogique de la France, N° 4, Alpes Maritimes", BRGM, 1974; [MinRec 32:312]; Riviéra Scientifique:85:3-12, 2001 (15 Oct 2001), Sarp, et al; Sarp, H. and Cerny R., 2001, Theoparacelsite, Cu3(OH)2As2O7, a new mineral: its description and crystal structure: Archs Sci. Geneve, 54:7-14.
        • Puget-Théniers
          • La-Croix-sur-Roudoule
    R. Pierrot, P. Picot, J. Féraud, J. Vernet : "Inventaire Minéralogique de la France N° 4 : Alpes-Maritimes", BRGM, 1974
    Germany
     
    • Bavaria
      • Franconia
        • Spessart
          • Aschaffenburg
            • Dörrmorsbach
    A. Wittern: "Mineralfundorte in Deutschland", Schweizerbart (Stuttgart), 2001
    • Rhineland-Palatinate
      • Hunsrück
        • Baumholder
    Rahm, B. (2014). Algodonit: Neufund eines seltenen Kupferarsenides. Aufschluss, 65, 73-77 (in German).
      • Palatinate
        • Winnweiler
          • Imsbach
    Rahm, B. (2014). Algodonit: Neufund eines seltenen Kupferarsenides. Aufschluss, 65, 73-77 (in German). (p. 76; analysis by Dr. G. Müller, Saarbrücken))
    Iran
     
    • Esfahan Province (Isfahan Province; Aspadana Province)
      • Nain County (Nayin County)
        • Anarak District
    AA. VV., 1996. Collezionare minerali. Hobby & Work.
    Kazakhstan
     
    • Karagandy Province (Qaragandy Oblysy; Karaganda Oblast')
      • Dzhezkazgan (Zhezqazghan)
    Evseev, A. A. (1995) Kazaknstan and Middle Asia. A brief Mineralogical Guide. World of Stone 8:24-30
    Namibia
     
    • Otjikoto Region (Oshikoto)
    AA. VV., 1996. Collezionare minerali. Hobby & Work.
    New Zealand
     
    • North Island
      • Northland
        • Kaipara
    Railton, G.L. & Watters, W.A., Minerals of New Zealand, New Zealand Geological Survey Bull. #104 (1990).
    Sweden
     
    • Värmland
      • Filipstad
    Nysten, P., Holtstam, D. and Jonsson, E. (1999) The Långban minerals. In Långban - The mines,their minerals, geology and explorers (D. Holtstam and J. Langhof, eds.), Swedish Museum of Natural History and Raster Förlag, Stockholm & Chr. Weise Verlag, Munich, pp. 89-183.
        • Persberg district
          • Pajsberg
    Nysten, P. (2004): Harstigen ett mineralogisk eldorado i Bergslagen. Norsk Bergverksmuseum Skrift 28: 5-13
    Switzerland
     
    • Aargau
      • Rheinfelden
    Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Verlag Wepf & Co. (Basel), p. 29
    • Vaud (Waadt)
      • Leysin
    Stalder, H. A., Wagner, A., Graeser, S. und Stuker, P. (1998): Mineralienlexikon der Schweiz. Wepf Verlag, Basel, 579 pp.
    • Wallis (Valais)
      • Turtmann Valley
        • Pipjitälli
    The Canadian Mineralogist Vol. 44, pp. 000 (2006) page 205; Ansermet, S. (2012): Mines et minéraux du Valais - II. Anniviers et Tourtemagne. With contributions by N. Meisser, Ed. Porte-plumes (Ayer)
    UK
     
    • England
      • Devon
        • East Devon
          • Budleigh Salterton
    from XRD and EPMA results - B. Smith
      • Leicestershire
        • Stanton under Bardon
    UKJMM 26:43-51
    USA
     
    • Colorado
      • Montrose Co.
        • La Sal District (Paradox Valley District)
    Minerals of Colorado (1997) Eckels, E. B.
    • Michigan
    www.deq.state.mi.us/documents/deq-glm-rcim-geology-Minerals_Found_In_Michigan.Pdf.
      • Houghton Co.
        • Houghton
        • Painesdale
    [Min. Rec.:23(2); Rocks & Min.:58:109.
        • Pewabic
    Dana 6:A2:2; Am.Jour.Sci.: 10:447 (1900).
    Mineralogy of Michigan (2004) Heinrich & Robinson
      • Keweenaw Co.
        • Ahmeek
    Rocks & Min.:58:111.
    Mineralogy of Michigan (2004) Heinrich & Robinson
    Mineralogy of Michigan (2004) Heinrich & Robinson
    Mineralogy of Michigan (2004) Heinrich & Robinson
        • Mohawk
    Mineralogical Record - Vol 23 No. 2; Rocks & Min.: 21:664.
    Rocks & Min.: 58:111.
    Mineralogy of Michigan (2004) Heinrich & Robinson
    Norman King Collection
      • Ontonagon Co.
        • Mass City
        • White Pine
    Mineralogy of Michigan (2004) Heinrich & Robinson
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