Argyrodite
A valid IMA mineral species - grandfathered
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About Argyrodite
Formula:
Ag8GeS6
Up to about 40 mol-% of the sulfur may be replaced by selenium (Wang et al., 1984). Intermediate members of the argyrodite-canfieldite series are common and many specimens of that series prove to be different members of the series than the label suggests.
Colour:
grey, black
Lustre:
Metallic
Hardness:
2½ - 3
Specific Gravity:
6.29
Crystal System:
Orthorhombic
Member of:
Name:
Named by Julius A. Weisbach in 1886 from the Greek αÏÎłÏ
ÏÏÎŽÎ·Ï ("argyrodes"), "silver-bearing", in allusion to its silver content.
Isostructural with:
Type locality material is usually botryoidal with crystallized surfaces are uncommon.
Unique Identifiers
Mindat ID:
331
Long-form identifier:
mindat:1:1:331:3
GUID
(UUID V4):
(UUID V4):
3a203f74-6c11-42c1-8855-4a11702cae97
IMA Classification of Argyrodite
Approved, 'Grandfathered' (first described prior to 1959)
First published:
1886
Classification of Argyrodite
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 : 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
2 : SULFIDES
5 : AmBnXp, with (m+n):p = 3:2
6.2.4
6 : Sulphosalts - Sulphostannates, Sulphogermanates,Sulpharsenates, Sulphantimonates, Sulphovanadates and Sulphohalides
2 : Sulphogermanates
6 : Sulphosalts - Sulphostannates, Sulphogermanates,Sulpharsenates, Sulphantimonates, Sulphovanadates and Sulphohalides
2 : Sulphogermanates
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMAâCNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMAâCNMNC symbol. Older variants are listed for historical use only.
Symbol | Source | Reference |
---|---|---|
Agy | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Agy | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Argyrodite
Metallic
Transparency:
Opaque
Colour:
grey, black
Comment:
Tarnishes black
Streak:
grey-black
Hardness:
2½ - 3 on Mohs scale
Hardness Data:
Measured
Tenacity:
Brittle
Fracture:
Irregular/Uneven, Conchoidal
Density:
6.29 g/cm3 (Measured) 6.32 g/cm3 (Calculated)
Optical Data of Argyrodite
Anisotropism:
weak
Reflectivity:
Wavelength | R1 | R2 |
---|---|---|
400nm | 28.9% | 29.5% |
420nm | 27.9% | 28.5% |
440nm | 27.1% | 27.7% |
460nm | 26.3% | 26.9% |
480nm | 25.8% | 26.3% |
500nm | 25.3% | 25.8% |
520nm | 25.0% | 25.4% |
540nm | 24.7% | 25.2% |
560nm | 24.6% | 25.0% |
580nm | 24.5% | 24.9% |
600nm | 24.4% | 24.9% |
620nm | 24.5% | 24.8% |
640nm | 24.6% | 24.9% |
660nm | 24.5% | 24.9% |
680nm | 24.6% | 25.0% |
700nm | 24.7% | 25.0% |
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
Chemistry of Argyrodite
Mindat Formula:
Ag8GeS6
Up to about 40 mol-% of the sulfur may be replaced by selenium (Wang et al., 1984). Intermediate members of the argyrodite-canfieldite series are common and many specimens of that series prove to be different members of the series than the label suggests.
Up to about 40 mol-% of the sulfur may be replaced by selenium (Wang et al., 1984). Intermediate members of the argyrodite-canfieldite series are common and many specimens of that series prove to be different members of the series than the label suggests.
Elements listed:
Common Impurities:
Fe,Sb,Sn
Crystallography of Argyrodite
Crystal System:
Orthorhombic
Class (H-M):
mm2 - Pyramidal
Space Group:
Pna21
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 V:
1,199.25 Ă
Âł (Calculated from Unit Cell)
Z:
4
Morphology:
Pseudo-octahedral, dodecahedral, cubes to 18cm
Twinning:
Pseudospinel {111}
Crystallographic forms of Argyrodite
Crystal Atlas:
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0014663 | Argyrodite | Eulenberger G (1977) Die kristallstrukture der tieftemperaturmodifikation von Ag8GeS6 Monatshefte fur Chemie 108 901-913 | 1977 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.14 Ă | (30) |
3.02 Ă | (100) |
2.77 Ă | (10) |
2.66 Ă | (40) |
2.57 Ă | (5) |
2.44 Ă | (30) |
2.32 Ă | (5) |
2.16 Ă | (10) |
2.03 Ă | (30) |
1.949 Ă | (10) |
1.863 Ă | (50) |
1.784 Ă | (20) |
1.585 Ă | (10) |
1.414 Ă | (5) |
1.482 Ă | (10) |
1.379 Ă | (5) |
1.287 Ă | (5) |
1.244 Ă | (10) |
1.228 Ă | (5) |
1.166 Ă | (20) |
Comments:
ICDD 14-356 Machacamarca, Bolivia.
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
High-đ alteration and/or metamorphism | |
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Geological Setting:
Low temperature polymetallic deposits, high temperature Ag-Sn deposits.
Type Occurrence of Argyrodite
General Appearance of Type Material:
Small crystals with edges <1 mm, generally in aggregates.
Place of Conservation of Type Material:
Mining Academy, Freiberg, Germany, 7058.
Geological Setting of Type Material:
Low-temperature polymetallic deposit.
Reference:
Weisbach, A. (1886) Argyrodit, ein neues Silbererz. Neues Jahrbuch fĂŒr Mineralogie, Geologie und PalĂ€ontologie: 2: 67-71.
Synonyms of Argyrodite
Other Language Names for Argyrodite
German:Argyrodit
Italian:Argirodite
Russian:ĐŃгОŃĐŸĐŽĐžŃ
Simplified Chinese:祫é¶éçż
Spanish:Argyrodita
Relationship of Argyrodite to other Species
Member of:
Other Members of this group:
Alburnite | Ag8GeTe2S4 | Iso. |
Canfieldite | Ag8SnS6 | Orth. mm2 |
Putzite | (Cu4.7Ag3.3)GeS6 | Iso. 4 3m : F4 3m |
Spryite | Ag8(As3+0.5As5+0.5)S6 | Orth. mm2 : Pna21 |
Forms a series with:
Common Associates
Associated Minerals Based on Photo Data:
28 photos of Argyrodite associated with Sphalerite | ZnS |
22 photos of Argyrodite associated with Galena | PbS |
12 photos of Argyrodite associated with Pyrite | FeS2 |
10 photos of Argyrodite associated with Arsenopyrite | FeAsS |
9 photos of Argyrodite associated with Acanthite | Ag2S |
8 photos of Argyrodite associated with Pyrargyrite | Ag3SbS3 |
6 photos of Argyrodite associated with Stephanite | Ag5SbS4 |
6 photos of Argyrodite associated with Polybasite | [Ag6Sb2S7][Ag9CuS4] |
4 photos of Argyrodite associated with Marcasite | FeS2 |
3 photos of Argyrodite associated with Smithite | AgAsS2 |
Related Minerals - Strunz-mindat Grouping
2.BA. | Orileyite | (Fe,Cu)2As |
2.BA. | Alburnite | Ag8GeTe2S4 |
2.BA. | DzierĆŒanowskite | CaCu2S2 |
2.BA. | Makotoite | Ag12(Cu3Au)S8 |
2.BA. | Xuwenyuanite | Ag9Fe3+Te2S4 |
2.BA.05 | Chalcocite | Cu2S |
2.BA.05 | Djurleite | Cu31S16 |
2.BA.05 | Geerite | Cu8S5 |
2.BA.05 | Roxbyite | Cu9S5 |
2.BA.10 | Anilite | Cu7S4 |
2.BA.10 | Digenite | Cu9S5 |
2.BA.15 | Bornite | Cu5FeS4 |
2.BA.20 | Bellidoite | Cu2Se |
2.BA.20 | Berzelianite | Cu2-xSe (x â 0.12) |
2.BA.25 | Athabascaite | Cu5Se4 |
2.BA.25 | Umangite | Cu3Se2 |
2.BA.30 | Rickardite | Cu7Te5 |
2.BA.30 | Weissite | Cu2-xTe |
2.BA.35 | Acanthite | Ag2S |
2.BA.35 | Spryite | Ag8(As3+0.5As5+0.5)S6 |
2.BA.40 | Mckinstryite | Ag5-xCu3+xS4 |
2.BA.40 | Stromeyerite | AgCuS |
2.BA.40d | UM2003-13-S:AgAuCu | Ag6AuCu2S5 |
2.BA.42 | Honeaite | Au3TlTe2 |
2.BA.45 | Jalpaite | Ag3CuS2 |
2.BA.45 | Kurilite | Ag8Te3Se |
2.BA.45 | Selenojalpaite | Ag3CuSe2 |
2.BA.47 | Spiridonovite | (Cu1-xAgx)2Te |
2.BA.50 | Eucairite | AgCuSe |
2.BA.50 | Wuyanzhiite | Cu2S |
2.BA.52 | Argentite | Ag2S |
2.BA.55 | Aguilarite | Ag4SeS |
2.BA.55 | Naumannite | Ag2Se |
2.BA.60 | Cervelleite | Ag4TeS |
2.BA.60 | Hessite | Ag2Te |
2.BA.60 | Chenguodaite | Ag9Fe3+Te2S4 |
2.BA.65 | Henryite | (Cu,Ag)3+xTe2 , with x ~ 0.40 |
2.BA.65 | StĂŒtzite | Ag5-xTe3, x = 0.24-0.36 |
2.BA.70 | Canfieldite | Ag8SnS6 |
2.BA.70 | Putzite | (Cu4.7Ag3.3)GeS6 |
2.BA.75 | Fischesserite | Ag3AuSe2 |
2.BA.75 | Penzhinite | (Ag,Cu)4Au(S,Se)4 |
2.BA.75 | Petrovskaite | AuAgS |
2.BA.75 | Petzite | Ag3AuTe2 |
2.BA.75 | Uytenbogaardtite | Ag3AuS2 |
2.BA.80 | Bezsmertnovite | (Au,Ag)4Cu(Te,Pb) |
2.BA.80 | Bilibinskite | PbCu2Au3Te2 |
2.BA.80 | Bogdanovite | (Au,Te,Pb)3(Cu,Fe) |
Fluorescence of Argyrodite
Not fluorescent in UV.
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.
Internet Links for Argyrodite
mindat.org URL:
https://www.mindat.org/min-331.html
Please feel free to link to this page.
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Mineral Dealers:
References for Argyrodite
Localities for Argyrodite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Arctic Ocean | |
| Marques et al. (2020) |
Argentina | |
| PUTZ +1 other reference |
PUTZ +1 other reference | |
| Coira et al. (1995) +2 other references |
| StrĂŒbel |
| Coira et al. (1995) +1 other reference |
| DE BRODTKORB +1 other reference |
Brodtkorb (2002) | |
| Gallard-Esquivel et al. (2018) |
| Mugas Lobos et al. (2020) |
Australia | |
| Pringle and Elliot 1998 |
| Sahlström et al. (2017) |
Bolivia | |
| Salomon Rivas y Federico Ahlfeld (1998) +1 other reference |
| Canfield (1907) |
Kempff et al. (La Paz, 2009) | |
Kempff et al. (La Paz, 2009) | |
Kempff et al. (La Paz, 2009) +1 other reference | |
| Federico Ahlfeld and Alejandro Schneider-Scherbina (1964) |
| Federico Ahlfeld y Jorge Muñoz Reyes (1955) +1 other reference |
| Mineralogical Society of America - ... |
| Wilson (2001) |
Wilson (2001) +1 other reference | |
| Federico Ahlfeld and Alejandro Schneider-Scherbina (1964) |
Bosnia and Herzegovina | |
| Slobodan A. RadosavljeviÄ et al. (2016) |
Canada | |
| Peatfield (n.d.) |
| Traill |
| Peatfield (n.d.) |
| Watson et al. (1996) |
China | |
| Anthony |
| Chao Chen and Fapeng Xie (1986) +1 other reference |
| Deqing Xu (1993) |
Czech Republic | |
| PaĆŸout et al. (2019) |
France | |
| |
| R. Pierrot +1 other reference |
| PĂ©lisson (1989) |
| PĂ©lisson (1989) |
| P. Picot |
| R. Pierrot |
Germany | |
| Walenta (1992) |
| F. Angel and R. Scharizer in "Grundriss der Mineralparagenese" (Wien) |
| A. Frenzel (1900) |
| Alice Kraissl |
| 90. +2 other references |
India | |
| Chauhan (1984) |
Indonesia | |
| Rivai +1 other reference |
Ireland | |
| Ryback et al. (1988) |
| Economic Geology (1984) +2 other references |
Japan | |
| Suji Ohno & Juichi Sato Ganko Vol. 90 (1995) |
| Ishiyama (1982) |
Ishiyama et al. (1989) | |
| - (Geology and Mineral Resources of Japan, p 204 ) |
| Shimizu et al. (2007) |
Kazakhstan | |
| Baibatsha et al. (2015) +1 other reference |
Mexico | |
| |
| Cano et al. (2024) |
Morocco | |
| S. WeiĂ: Lapis 31 (7/8) |
Namibia | |
| Bowell +1 other reference |
New Zealand | |
| Railton et al. (1990) |
January 2010 An assessment of the value ... | |
Econ Geol (1997) | |
Peru | |
| EDS Analysis Frank Keutsch |
Poland | |
| KozĆowski et al. (2022) |
PiestrzyĆski (Main Ed.) | |
PiestrzyĆski et al. (2012) | |
| Lis et al. (1986) |
Portugal | |
| Bowles (1987) |
Romania | |
| CioacÄ et al. (2014) |
| CioacÄ et al. (2014) |
| Bailly +9 other references |
| Cook et al. (2003) +1 other reference |
| SÄbÄu et al. (2016) |
| Bailly et al. (1998) |
Russia | |
| Belogub et al. (2005) +1 other reference |
| Kolova et al. (2021) |
Pekov (1998) | |
| Tolstykh et al. (2022) |
| R.G. Kravtsova et al. (2015) +3 other references |
| Volkov et al. (2021) |
Goryachev et al. (2014) | |
| Ivin et al. (2021) |
| Kazachenko et al. (2008, August) |
Slovakia | |
| ÄuÄa R. & KoĆĄarkovĂĄ M. (1999) |
ÄuÄa R. & KoĆĄarkovĂĄ M. (1999) | |
South Korea | |
| Mineralogical Society of America - ... +1 other reference |
Spain | |
| Colectivo Arrayanes et al. (2008) |
| Mineralogical Record (3) |
Calvo et al. (1992) | |
Sweden | |
| |
Switzerland | |
| Huttenlocher (1936) |
USA | |
| USGS OFR 2004-1200 (Hawley,2004) |
| Taylor |
| Mineralogical Record:16 (3) |
| NBMG Bull 99B Geology and Mineral ... |
| Bullock (1981) |
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Colquechaca, Colquechaca Municipality, Chayanta Province, PotosĂ, Bolivia