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Argyrodite

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Formula:
Ag
 
8
GeS
 
6
Up to about 40 mol-% of the sulfur may be replaced by selenium (Wang et al., 1984)
System:OrthorhombicColour:grey, black
Hardness:2½ - 3
Member of:Argyrodite Group
Name:From the Greek αργυρώδης ("argyrodes"), "silver-bearing", in allusion to its silver content
This page provides mineralogical data about Argyrodite.

Classification of Argyrodite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:2/B.08-10
Nickel-Strunz 10th (pending) edition ID:2.BA.70

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
A : With Cu, Ag, Au
Dana 8th edition ID:2.5.6.1

2 : SULFIDES
5 : AmBnXp, with (m+n):p = 3:2
Hey's CIM Ref.:6.2.4

6 : Sulphosalts - Sulphostannates, Sulphogermanates,Sulpharsenates, Sulphantimonates, Sulphovanadates and Sulphohalides
2 : Sulphogermanates
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Type Occurrence of Argyrodite

Type Locality:Himmelsfürst Mine, Brand-Erbisdorf, Freiberg District, Erzgebirge, Saxony, Germany
Year of Discovery:1886

Occurrences of Argyrodite

Geological Setting:Low temperature polymetallic deposits, high temperature Ag-Sn deposits.

Physical Properties of Argyrodite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:grey, black
Comment:Tarnishes black
Streak:grey-black
Hardness (Mohs):2½ - 3
Hardness Data:Measured
Tenacity:Brittle
Fracture:Irregular/Uneven, Conchoidal
Density (measured):6.29 g/cm3
Density (calculated):6.32 g/cm3

Crystallography of Argyrodite

Crystal System:Orthorhombic
Class (H-M):mm2 - Pyramidal
Space Group:Pna21
Space Group Setting:Pna21
Cell Parameters:a = 15.149(1) Å, b = 7.476(2) Å, c = 10.589(1) Å
Ratio:a:b:c = 2.026 : 1 : 1.416
Unit Cell Volume:V 1,199.25 ų (Calculated from Unit Cell)
Z:4
Morphology:Pseudo-octahedral, dodecahedral, cubes to 18cm
Twinning:Pseudospinel {111}
Crystal Atlas:
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Argyrodite no.4 - Goldschmidt (1913-1926)

About Crystal Atlas

The mindat.org Crystal Atlas allows you to view a selection of crystal drawings of real and idealised crystal forms for this mineral and, in certain cases, 3d rotating crystal objects. The 3d models and HTML5 code are kindly provided by www.smorf.nl.

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Edge Lines | Miller Indicies | Axes

Transparency
Opaque | Translucent | Transparent

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Along a-axis | Along b-axis | Along c-axis | Start rotation | Stop rotation
X-Ray Powder Diffraction:
d-spacingIntensity
3.14 (30)
3.02 (100)
2.66 (40)
2.44 (30)
2.03 (30)
1.863 (50)
1.784 (20)
Comments:Machacamarca, Bolivia.

Optical Data of Argyrodite

Type:Anisotropic
Anisotropism:weak
Reflectivity:
400nmR1=28.9%R2= 29.5%
420nmR1=27.9%R2= 28.5%
440nmR1=27.1%R2= 27.7%
460nmR1=26.3%R2= 26.9%
480nmR1=25.8%R2= 26.3%
500nmR1=25.3%R2= 25.8%
520nmR1=25.0%R2= 25.4%
540nmR1=24.7%R2= 25.2%
560nmR1=24.6%R2= 25.0%
580nmR1=24.5%R2= 24.9%
600nmR1=24.4%R2= 24.9%
620nmR1=24.5%R2= 24.8%
640nmR1=24.6%R2= 24.9%
660nmR1=24.5%R2= 24.9%
680nmR1=24.6%R2= 25.0%
700nmR1=24.7%R2= 25.0%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 29.5%.
R1 shown in black, R2 shown in red
Colour in reflected light:Grey-white with violet tint
Pleochroism:Weak

Chemical Properties of Argyrodite

Formula:
Ag
 
8
GeS
 
6


Up to about 40 mol-% of the sulfur may be replaced by selenium (Wang et al., 1984)
Simplified for copy/paste:Ag8GeS6
Essential elements:Ag, Ge, S
All elements listed in formula:Ag, Ge, S
Analytical Data:Aullagas, Bolivia.
Ag (74.20)
Fe (0.68)
Ge (4.99)
Sn (3.36)
Sb (trace)
S (16.45)
Total (99.68)
Common Impurities:Fe,Sb,Sn

Relationship of Argyrodite to other Species

Series:Forms a series with Canfieldite (see here)
Member of:Argyrodite Group
Other Members of Group:

- +
Alburnite
Ag
 
8
GeTe
 
2
S
 
4
Canfieldite
Ag
 
8
SnS
 
6
Putzite
(Cu
 
4.7
Ag
 
3.3
)GeS
 
6
Common Associates:
StephanitePyrargyritePolybasiteCanfielditeAcanthite
Related Minerals - Nickel-Strunz Grouping):

- +
2.BA.05Chalcocite
Cu
 
2
S
2.BA.05Djurleite
Cu
 
31
S
 
16
2.BA.05Geerite
Cu
 
8
S
 
5
2.BA.05Roxbyite
Cu
 
9
S
 
5
2.BA.10Anilite
Cu
 
7
S
 
4
2.BA.10Digenite
Cu
 
9
S
 
5
2.BA.15Bornite
Cu
 
5
FeS
 
4
2.BA.20Bellidoite
Cu
 
2
Se
2.BA.20Berzelianite
Cu
 
2
Se
2.BA.25Athabascaite
Cu
 
5
Se
 
4
2.BA.25Umangite
Cu
 
3
Se
 
2
2.BA.30Rickardite
Cu
 
7
Te
 
5
2.BA.30Weissite
Cu
 
2-x
Te
2.BA.35Acanthite
Ag
 
2
S
2.BA.40Mckinstryite
Ag
 
5-x
Cu
 
3+x
S
 
4
2.BA.40Stromeyerite
AgCuS
2.BA.40dUM2003-13-S:AgAuCu
Ag
 
6
AuCu
 
2
S
 
5
2.BA.45Jalpaite
Ag
 
3
CuS
 
2
2.BA.45Selenojalpaite
Ag
 
3
CuSe
 
2
2.BA.50Eucairite
AgCuSe
2.BA.55Aguilarite
Ag
 
4
SeS
2.BA.55Naumannite
Ag
 
2
Se
2.BA.60Cervelleite
Ag
 
4
TeS
2.BA.60Hessite
Ag
 
2
Te
2.BA.60Chenguodaite
Ag
 
9
Fe
3+
 
Te
 
2
S
 
4
2.BA.65Henryite
Ag
 
3
Cu
 
4
Te
 
4
2.BA.65Stützite
Ag
 
5-x
Te
 
3
, x = 0.24-0.36
2.BA.70Canfieldite
Ag
 
8
SnS
 
6
2.BA.70Putzite
(Cu
 
4.7
Ag
 
3.3
)GeS
 
6
2.BA.75Fischesserite
Ag
 
3
AuSe
 
2
2.BA.75Penzhinite
(Ag,Cu)
 
4
Au(S,Se)
 
4
2.BA.75Petrovskaite
AuAg(S,Se)
2.BA.75Petzite
Ag
 
3
AuTe
 
2
2.BA.75Uytenbogaardtite
Ag
 
3
AuS
 
2
2.BA.80Bezsmertnovite
(Au,Ag)
 
4
Cu(Te,Pb)
2.BA.80Bilibinskite
PbCu
 
2
Au
 
3
Te
 
2
2.BA.80Bogdanovite
(Au,Te,Pb)
 
3
(Cu,Fe)
Related Minerals - Hey's Index Grouping:

- +
6.2.1Germanite
Cu
 
13
Fe
 
2
Ge
 
2
S
 
16
6.2.2Briartite
Cu
 
2
(Fe,Zn)GeS
 
4
6.2.3Renierite
(Cu,Zn)
 
11
(Ge,As)
 
2
Fe
 
4
S
 
16
6.2.5Canfieldite
Ag
 
8
SnS
 
6
6.2.6Morozeviczite
(Pb,Fe)
 
3
Ge
 
1-x
S
 
4
6.2.7Polkovicite
(Fe,Pb)
 
3
(Ge,Fe)
 
1-x
S
 
4

Other Names for Argyrodite

Synonyms:
Plusinglanz
Other Languages:
German:Argyrodit
Italian:Argirodite
Russian:Аргиродит
Simplified Chinese:硫银锗矿
Spanish:Argyrodita

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 Argyrodite

Reference List:

- +
Weisbach, A. (1886) Berg- und hütten. Jahrbuch Sachs.: 89.

Weisbach, A. (1886): Argyrodit, ein neues Silbererz.- Neues Jahrbuch für Mineralogie, Geologie und Paläontologie, vol. II, 67-71.

Ahlfeld and Moritz (1933), Jb. Min., Beil.-Bd.: 66: 185.

Ahlfeld and Reyes (1938).

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: 356-358.

Wang, Naiding and Viaene, W. (1974) The polymorphs of Cu8GeS6 - a preliminary study. Neues Jahrb. Mineral., Monatsh.: 442-446.

Eulenberger, G. (1977) Die Kristallstruktur der Tieftemperaturmodifikation von Ag8GeS6, synthetischer Argyrodit. Monatsh. Chem.: 108: 901-913.

Kuhs, W.F., Nitsche, R., and Scheunemann, K. (1979) The argyrodites - a new family of tetrahedrally close-packed structures. Materials Research Bulletin: 14: 241-248.

Yuecue Wang, Rongying Zhang, and Zhizhong Peng (1984): On the mineralogy of selenium rich argyrodite. Acta Petrologica Mineralogica et Analytica 3(2), 124-133 (in Chinese with English abstract).

Evain, M., Gaudin, E., Boucher, F., Petříček, V., and Taulelle, F. (1998) Structures and phase transitions of the A7PSe6(A= Ag, Cu) argyrodite-type ionic conductors. I. Ag7PSe6. Acta Crystallographica: B54: 376-383.

Onoda,M., Chen, Xue An., Kato,K., Sato, A., and Wada, H. (1999) Structure refinement of Cu8GeS6 using X-ray diffraction data from a multiple-twinned crystal. Acta Crystallographica: B55: 721-725.

Internet Links for Argyrodite

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

    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
     
    • Catamarca
      • Andalgalá Department
        • Capillitas Mine
    PUTZ, Hubert; PAAR, Werner H and TOPA, Dan. A contributionto the knowledge of the mineralization at mina Capillitas, Catamarca. Rev. Asoc. Geol. Argent. [online]. 2009, vol.64, n.3, pp. 514-524.
    PUTZ, Hubert; PAAR, Werner H and TOPA, Dan. A contributionto the knowledge of the mineralization at mina Capillitas, Catamarca. Rev. Asoc. Geol. Argent. [online]. 2009, vol.64, n.3, pp. 514-524.
    • Jujuy
      • Rinconada Department
    Milka K. de Brodtkorb (2002) Las Especies Minerales de la Republica Argentina. Vol. 1 (elements, sulphides and sulphosalts). (Asociacion Mineralogica Argentina)
    Milka K. de Brodtkorb (2002) Las Especies Minerales de la Republica Argentina. Vol. 1 (elements, sulphides and sulphosalts). (Asociacion Mineralogica Argentina)
    Strübel, Zimmer: "Lexikon der Minerale", 2nd Ed., 1991
    • La Rioja
      • Sierra de Famatina
        • Chilecito Department
    DE BRODTKORB, Milka K. Precious metaltellurides and other Te-bearing minerals in different paragenesis of Argentina: A review. Rev. Asoc. Geol. Argent. [online]. 2009, vol.64, n.3, pp. 365-372.; Paar, W. H., Putz, H., Topa, D., de Brodtkorb, M. K., & Sureda, R. J. (2005, January). Occurrence and paragenesis of tellurium in mineral deposits of Argentina. In Mineral Deposit Research: Meeting the Global Challenge (pp. 1419-1422). Springer Berlin Heidelberg.
    Brodtkorb (2002): Las Especies Minerales de la Republica Argentina
    Australia
     
    • New South Wales
      • Phillip Co.
        • Lue
    Pringle and Elliot 1998, Australasian Institute of Mining and Metallurgy Monograph 22.
    Bolivia
     
    • Oruro Department
      • Poopó Province
    Salomon Rivas y Federico Ahlfeld (1998) Los Minerales de Bolivia y sus Parajes. (Santa Cruz)
    • Potosí Department
      • Antonio Quijarro Province
        • Agua de Castilla
    Canfield, F. A. (1907). Mineralogical notes. American Journal of Science, (133), 20-22.
    Kempff, O., Paar, W.H., Tawackoli, S.: "Minerales de Bolivia", 115pp (La Paz, 2009)
    Kempff, O., Paar, W.H., Tawackoli, S.: "Minerales de Bolivia", 115pp (La Paz, 2009)
    Kempff, O., Paar, W.H., Tawackoli, S.: "Minerales de Bolivia", 115pp (La Paz, 2009); Federico Ahlfeld and Jorge Muñoz Reyes (1955) Las Especies Minerales de Bolivia. (Banco Minero de Bolivia, 180 pp)
    Federico Ahlfeld and Alejandro Schneider-Scherbina (1964) Los Yacimientos Minerales y de Hidrocarburos de Bolivia. (Ministerio de Minas y Petroleo, La Paz)
      • Chayanta Province
    No reference listed
      • Potosí City
    Federico Ahlfeld and Alejandro Schneider-Scherbina (1964) Los Yacimientos Minerales y de Hidrocarburos de Bolivia. (Ministerio de Minas y Petroleo, La Paz)
      • Sud Chichas Province
        • Atocha-Quechisla District
    [MinRec 32:461]
    [MinRec 32:461]
    Canada
     
    • British Columbia
      • Kamloops Mining Division
        • Siwash Creek
    Traill, R. J., 1970, A Catalogue of Canadian Minerals
    China
     
    • Fujian Province
      • Nanping Prefecture
        • Jianyang Co.
          • Shuiji Pb-Zn-(Ag) deposit
    Anthony, J.W. et al.: Handbook of Mineralogy.
    • Hubei Province
      • Yichang Prefecture
        • Xingshan Co.
    Chao Chen and Fapeng Xie (1986): Mineral Deposits 5(1), 53-62; Tianwei Guo and Zhongwen Han (1990): Northeastern Geological Science and Technology Information 11(2), 1-11
    • Jiangxi Province
      • Ganzhou Prefecture
        • Xingguo Co.
    Deqing Xu (1993): Jiangxi Nonferrous Metals 7(4), 171-175
    France
     
    • Auvergne
      • Cantal
        • Laroquebrou
          • Saint-Santin-Cantalès
        • Massiac
          • Molèdes
    Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990
      • Haute-Loire
        • Allègre
          • Bellevue-la-Montagne
    P.G. Pélisson : "Etude Minéralogique et Métallogénique du District Filonien Polytype de Paulhaguet (Haute-Loire, Massif Central Français)", Doctorate Thesis, Orléans, France, 1989
        • La Chaise-Dieu
          • Saint-Pal-de-Senouire
    P.G. Pélisson : "Etude Minéralogique et Métallogénique du District Filonien Polytype de Paulhaguet (Haute-Loire, Massif Central Français)", Doctorate Thesis, Orléans, France, 1989
    • Limousin
      • Haute-Vienne
        • Rilhac-Lastours
    P. Picot, Z. Johan : "Atlas of Ore Minerals", BRGM, Elsevier, 1982
    • Provence-Alpes-Côte d'Azur
      • Alpes-Maritimes
        • Saint-Sauveur-sur-Tinée
          • Roure
    R. Pierrot, P. Picot, J. Féraud, J. Vernet : "Inventaire Minéralogique de la France N° 4 : Alpes-Maritimes", BRGM, 1974
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Elz valley
          • Waldkirch
    K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
    • Saxony
      • Erzgebirge
        • Freiberg District
          • Brand-Erbisdorf
    F. Angel and R. Scharizer in "Grundriss der Mineralparagenese", Springer (Wien), 1932, pp. 221-222
            • Vereinigt Feld Mine
    A. Frenzel (1900): Argyrodit ist Breithaupt's Plusinglanz.- Tschermaks Mineralogische und Petrographische Mitteilungen 19, 244-245
          • Zug
    Baumann, L., Hofmann, F. & Weber, W. (1997): Glückauf Freiberg. Bergbau, Erze, Mineralien. Bode Verlag Haltern, 168 p.
    India
     
    • Rajasthan (Rajputana)
      • Udaipur Division
        • Udaipur District
          • Udaipur
            • Zawar Mines
    Chauhan, D. S. (1984). Sedimentary pyrite from Pb-Zn deposits of the Zawar and Rajpura-Dariba regions and its bearing on the genesis of base metal sulfides. In Syngenesis and Epigenesis in the Formation of Mineral Deposits (pp. 36-42). Springer Berlin Heidelberg.
    Ireland
     
    • Co. Tipperary
      • Silvermines District
    Econ Geol (1984) 79:529-548 Moreton, S. (1999) Mineralogical Record, 30, 99-106.
    Japan
     
    • Hokkaido
      • Hidaka Province
        • Monbetsu (Mombetsu)
    (Geology and Mineral Resources of Japan, p 204 (Geological Survey of Japan, 1960).
      • Oshima peninsula
        • Hiyama Subprefecture
          • Kaminokuni
    Ishiyama, D. et al (1982) Journal of the Mining College, Akita University, Ser. A, Mining Geology, 6, #2, 149-171.
    • Honshu Island
      • Tohoku Region
        • Akita Prefecture
          • Odate
    Suji Ohno & Juichi Sato Ganko Vol. 90, 268-279 (1995) .
    Mexico
     
    • Guanajuato
      • Mun. de Guanajuato
        • Guanajuato
    No reference listed
    Morocco
     
    • Souss-Massa-Draâ Region
      • Ouarzazate Province
        • Tazenakht
    S. Weiß: Lapis 31(7/8), 72-73 (2006)
    New Zealand
     
    • North Island
      • Auckland
        • Auckland City
    Railton, G.L. & Watters, W.A., Minerals of New Zealand, New Zealand Geological Survey Bull. #104 (1990).
    Econ Geol (1997) 92:468-484
    Romania
     
    • Alba Co.
    Bailly, Laurent; Tamas, Calin-Gabriel; Minut, Adrian (2005): Te-rich argyrodite occurrence in Rosia Montana ore deposit, Apuseni Mountains, Romania. Comptes Rendus Geoscience 337, 755-762; Tamas, C. G.; Bailly, L.; Ghergari, L.; O'Connor, G.; Minut, A. (2006): New occurrences of tellurides and argyrodite in Rosia Montana, Apuseni mountains, Romania, and their metallogenic significance. Canadian Mineralogist 44, 367-383.
    • Maramureș Co.
    Bailly, L., Milesi, J. P., Leroy, J., & Marcoux, E. (1998). Les minéralisations épithermales à Au-Cu-Zn-Sb du district de Baia Mare (Nord Roumanie): nouvelles données minéralogiques et microthermométriques. Comptes Rendus de l'Académie des Sciences-Series IIA-Earth and Planetary Science, 327(6), 385-390.
    Russia
     
    • Far-Eastern Region
      • Chukotskii Autonomous Okrug
    Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Slovakia
     
    • Prešov Region
      • Prešov Co.
    Ďuďa R. & Košarková M. (1999): Argyrodit - prvý výskyt na Slovensku. Bull. Mineral.-petrolog. Odd. NM (Praha), 7, 163-164.(in Slovak)
    Spain
     
    • Andalusia
      • Jaén
        • Linares-La Carolina District
          • Linares
    Colectivo Arrayanes, Fernando J. Palero, Gonzalo Garcia, Cesar Menor (2008): El Coto de la Luz. Bocamina, 22: 56-105.
    • Castile-La Mancha
      • Guadalajara
    Mineralogical Record, 23 (3), 241-249
    Jordi Fabre
    Sweden
     
    • Värmland
      • Säffle
        • Långserud
    No reference listed
    USA
     
    • Alaska
      • Denali Borough
        • Denali NP and Preserve
          • Kantishna Hills District
    USGS OFR 2004-1200(Hawley,2004)
      • Juneau Borough
        • Admiralty District
    Taylor, C.D., and Johnson, C.A., editors, 2010, Geology, geochemistry, and genesis of the Greens Creek massive sulfide deposit, Admiralty Island, southeastern Alaska: U.S. Geological Survey Professional Paper 1763, 429 p., 7 plates on CD.
    • Colorado
      • Dolores Co.
        • Rico District (Pioneer District)
          • Expectation Mountain
    Min. Rec.:16(3):203-216
    • Nevada
      • Nye Co.
    NBMG Bull 99B Geology and Mineral Resources of Northern Nye County, Nevada
    • Utah
      • Box Elder Co.
        • Grouse Creek Mts
          • Ashbrook District
    UGMS Bull 117 Minerals and Mineral Localities of Utah
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