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Argyrodite

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Formula:
Ag8GeS6
Up to about 40 mol-% of the sulfur may be replaced by selenium (Wang et al., 1984)
System:
Orthorhombic
Colour:
grey, black
Hardness:
2½ - 3
Name:
From the Greek αργυρώδης ("argyrodes"), "silver-bearing", in allusion to its silver content
This page provides mineralogical data about Argyrodite.

Classification of Argyrodite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
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
2.5.6.1

2 : SULFIDES
5 : AmBnXp, with (m+n):p = 3:2
6.2.4

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

Year of Discovery:
1886

Occurrences of Argyrodite

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

Physical Properties of Argyrodite

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:
6.29 g/cm3 (Measured)    6.32 g/cm3 (Calculated)

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}

Crystallographic forms of Argyrodite

Crystal Atlas:
Image Loading
Click on an icon to view
Argyrodite no.4 - Goldschmidt (1913-1926)
3d models and HTML5 code kindly provided by www.smorf.nl.

Toggle
Edge Lines | Miller Indicies | Axes

Transparency
Opaque | Translucent | Transparent

View
Along a-axis | Along b-axis | Along c-axis | Start rotation | Stop rotation
X-Ray Powder Diffraction Data:
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%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. 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:
Ag8GeS6

Up to about 40 mol-% of the sulfur may be replaced by selenium (Wang et al., 1984)
Essential elements:
All elements listed in formula:
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)
Other Members of Group:
AlburniteAg8GeTe2S4
CanfielditeAg8SnS6
Putzite(Cu4.7Ag3.3)GeS6
2.BA.05ChalcociteCu2S
2.BA.05DjurleiteCu31S16
2.BA.05GeeriteCu8S5
2.BA.05RoxbyiteCu9S5
2.BA.10AniliteCu7S4
2.BA.10DigeniteCu9S5
2.BA.15BorniteCu5FeS4
2.BA.20BellidoiteCu2Se
2.BA.20BerzelianiteCu2Se
2.BA.25AthabascaiteCu5Se4
2.BA.25UmangiteCu3Se2
2.BA.30RickarditeCu7Te5
2.BA.30WeissiteCu2-xTe
2.BA.35AcanthiteAg2S
2.BA.40MckinstryiteAg5-xCu3+xS4
2.BA.40StromeyeriteAgCuS
2.BA.40dUM2003-13-S:AgAuCuAg6AuCu2S5
2.BA.45JalpaiteAg3CuS2
2.BA.45SelenojalpaiteAg3CuSe2
2.BA.50EucairiteAgCuSe
2.BA.55AguilariteAg4SeS
2.BA.55NaumanniteAg2Se
2.BA.60CervelleiteAg4TeS
2.BA.60HessiteAg2Te
2.BA.60ChenguodaiteAg9Fe3+Te2S4
2.BA.65Henryite(Cu,Ag)3+xTe2 , with x ~ 0.40
2.BA.65StütziteAg5-xTe3, x = 0.24-0.36
2.BA.70CanfielditeAg8SnS6
2.BA.70Putzite(Cu4.7Ag3.3)GeS6
2.BA.75FischesseriteAg3AuSe2
2.BA.75Penzhinite(Ag,Cu)4Au(S,Se)4
2.BA.75PetrovskaiteAuAg(S,Se)
2.BA.75PetziteAg3AuTe2
2.BA.75UytenbogaardtiteAg3AuS2
2.BA.80Bezsmertnovite(Au,Ag)4Cu(Te,Pb)
2.BA.80BilibinskitePbCu2Au3Te2
2.BA.80Bogdanovite(Au,Te,Pb)3(Cu,Fe)
6.2.1GermaniteCu13Fe2Ge2S16
6.2.2BriartiteCu2(Fe,Zn)GeS4
6.2.3Renierite(Cu,Zn)11(Ge,As)2Fe4S16
6.2.5CanfielditeAg8SnS6
6.2.6Morozeviczite(Pb,Fe)3Ge1-xS4
6.2.7Polkovicite(Fe,Pb)3(Ge,Fe)1-xS4

Other Names for Argyrodite

Name in Other Languages:
German:Argyrodit
Italian:Argirodite
Simplified Chinese:硫银锗矿
Spanish:Argyrodita

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 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

Localities for Argyrodite

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.
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
    • Chilecito department
      • Chilecito
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
Harris, DC and DR Owens (1971) A Telurium-bearing Canfieldite from Revelstoke, BC. Canadian Mineralogist 10:895-898
    • 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
        • Chocaya-Animas (Animas-Chocaya)
[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.
      • San Antonio Mts
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
Mineral and/or Locality  
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