Fischesserite
A valid IMA mineral species
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About Fischesserite
Formula:
Ag3AuSe2
Colour:
Black
Lustre:
Metallic
Hardness:
2
Specific Gravity:
9.05 (Calculated)
Crystal System:
Isometric
Name:
Named by Zdenek Johan, Paul Picot, Roland Pierrot, and Milan Kvacek in 1971 in honor of Raymond Fischesser (1911-1991), French mineralogist and crystallographer, Director of the National School of Mines, Paris, France.
Black equant crystals and grains, frequently as microscopic intergrowths.
Unique Identifiers
Mindat ID:
1552
Long-form identifier:
mindat:1:1:1552:9
GUID
(UUID V4):
(UUID V4):
2dd83588-7a20-4017-96c6-5fb4e1cc2cb8
IMA Classification of Fischesserite
Approved
First published:
1971
Classification of Fischesserite
2.BA.75
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
2.4.3.2
2 : SULFIDES
4 : AmBnXp, with (m+n):p = 2:1
2 : SULFIDES
4 : AmBnXp, with (m+n):p = 2:1
3.3.5
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
3 : Sulphides etc. of Au
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
3 : Sulphides etc. of Au
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 |
---|---|---|
Fis | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Fis | 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 Fischesserite
Metallic
Transparency:
Opaque
Colour:
Black
Hardness:
2 on Mohs scale
Hardness:
VHN50=32.7 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Density:
9.05 g/cm3 (Calculated)
Optical Data of Fischesserite
Reflectivity:
Wavelength | R |
---|---|
420nm | 33.4% |
440nm | 33.6% |
460nm | 33.1% |
480nm | 32.3% |
500nm | 31.3% |
520nm | 30.1% |
540nm | 29.7% |
560nm | 29.9% |
580nm | 31.0% |
600nm | 32.0% |
620nm | 32.9% |
640nm | 33.8% |
660nm | 34.7% |
680nm | 35.4% |
700nm | 36.0% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 36.0%.
Colour in reflected light:
Light pink, close to the color of enargite
Chemistry of Fischesserite
Mindat Formula:
Ag3AuSe2
Elements listed:
Common Impurities:
Cu
Crystallography of Fischesserite
Crystal System:
Isometric
Class (H-M):
4 3 2 - Gyroidal
Space Group:
I41 3 2
Cell Parameters:
a = 9.967 Å
Unit Cell V:
990.13 Ă
Âł (Calculated from Unit Cell)
Z:
8
Morphology:
Massive, xenomorphic grains
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
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) |
---|---|---|---|---|---|---|---|
0005994 | Fischesserite | Bindi L, Cipriani C (2004) Structural and physical properties of fischesserite, a rare gold-silver selenide from the De Lamar mine, Owyhee County, Idaho, USA The Canadian Mineralogist 42 1733-1737 | 2004 | De Lamar mine, Owyhee County, Idaho, USA | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
7.08 Ă | (60) |
3.50 Ă | (10) |
3.15 Ă | (30) |
2.877 Ă | (40) |
2.662 Ă | (100) |
2.349 Ă | (50) |
2.29 Ă | (80) |
2.035 Ă | (80) |
1.954 Ă | (60) |
1.820 Ă | (80) |
1.763 Ă | (20) |
1.708 Ă | (10) |
1.501 Ă | (40) |
1.469 Ă | (50) |
1.439 Ă | (40) |
1.410 Ă | (30) |
1.382 Ă | (30) |
1.332 Ă | (60) |
1.266 Ă | (70) |
1.246 Ă | (30) |
1.227 Ă | (20) |
1.159 Ă | (20) |
1.130 Ă | (30) |
Comments:
ICDD 25-367
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Near-surface Processes | |
23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) | |
High-đ alteration and/or metamorphism | |
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Type Occurrence of Fischesserite
General Appearance of Type Material:
Xenomorphic grains
Place of Conservation of Type Material:
National School of Mines, Paris, France
Geological Setting of Type Material:
Carbonate vein in epithermal precious metal hydrothermal deposit.
Associated Minerals at Type Locality:
Reference:
Johan, Z., Picot, P., Pierrot, R., KvaÄek, M. (1971) La fischesserite, Ag3AuSe2, premier sĂ©lĂ©niure d'or, isotype de la petzite. Bulletin de la SociĂ©tĂ© Française de MinĂ©ralogie et de Cristallographie: 94: 381-384.
Synonyms of Fischesserite
Other Language Names for Fischesserite
Common Associates
Associated Minerals Based on Photo Data:
11 photos of Fischesserite associated with Gold | Au |
10 photos of Fischesserite associated with Clausthalite | PbSe |
5 photos of Fischesserite associated with Chrisstanleyite | Ag2Pd3Se4 |
4 photos of Fischesserite associated with Cerussite | PbCO3 |
4 photos of Fischesserite associated with Chlorargyrite | AgCl |
3 photos of Fischesserite associated with Klockmannite | CuSe |
3 photos of Fischesserite associated with Naumannite | Ag2Se |
2 photos of Fischesserite associated with Eucairite | AgCuSe |
2 photos of Fischesserite associated with Calcite | CaCO3 |
2 photos of Fischesserite associated with Penroseite | (Ni,Co,Cu)Se2 |
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 | Argyrodite | Ag8GeS6 |
2.BA.70 | Canfieldite | Ag8SnS6 |
2.BA.70 | Putzite | (Cu4.7Ag3.3)GeS6 |
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 Fischesserite
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 Fischesserite
mindat.org URL:
https://www.mindat.org/min-1552.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Fischesserite
Reference List:
Johan, Zdenek, Picot, Paul, Pierrot, Roland, Kvacek, Milan (1971) La fischesserite, Ag8AuSe2, premier séléniure d'or, isotype de la petzite. Bulletin de Minéralogie, 94 (4) 381-384 doi:10.3406/bulmi.1971.6592
Localities for Fischesserite
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.
Argentina | |
| M.K. de Brodtkorb (ed.) |
Minerales de la Republica Argentina | |
| Marquez-Zavalia et al. (2021) |
| DE BRODTKORB +1 other reference |
Recursos Minerales de la Republica ... | |
Austria | |
| Kolitsch et al. (2020) |
Brazil | |
| Berni et al. (2014) +1 other reference |
Canada | |
| Sparkes et al. (2016) |
| Thorpe et al. (1976) +2 other references |
Chile | |
| Gibbons (2018) |
| Extra Lapis English No. 5 Gold |
China | |
| Yuan Li (1998) |
Czech Republic (TL) | |
| Bull.Soc.fr.Min.Crist. (1971) +1 other reference |
| StrĂŒbel |
Japan | |
| ç°äžćŽèŁă»æż±æ č性èŒ: ... |
| Hamada et al. (2022) |
Mexico | |
| Solana Espinosa +2 other references |
New Zealand | |
| Cocker et al. (2013) |
Peru | |
| Alfonso et al. (2023) |
Russia | |
| N.E. Savva et al. (2012) +1 other reference |
| Kolova et al. (2021) |
| Kasatkin et al. (2023) +1 other reference |
Spiridonov et al. (2009, April) +1 other reference | |
| Kuleshevich et al. (2012) |
| Kuzhuget et al. (2015) |
Kuzhuget et al. (2022) | |
Sweden | |
| Sandström (2007) |
UK | |
| Stanley et al. (1990) +1 other reference |
USA | |
| Extra Lapis English No. 5 Gold |
| Collins (2012) |
| Castor et al. (2004) |
Castor et al. (2004) | |
Castor et al. (2004) | |
Tharalson +5 other references | |
| Lasmanis (1995) |
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PĆedboĆice deposit, PĆedboĆice, KovĂĄĆov, PĂsek District, South Bohemian Region, Czech Republic