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Fischesserite

A valid IMA mineral species
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About FischesseriteHide

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 IdentifiersHide

Mindat ID:
1552
Long-form identifier:
mindat:1:1:1552:9
GUID
(UUID V4):
2dd83588-7a20-4017-96c6-5fb4e1cc2cb8

IMA Classification of FischesseriteHide

Classification of FischesseriteHide

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
2.4.3.2

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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

SymbolSourceReference
FisIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
FisThe 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 FischesseriteHide

Metallic
Transparency:
Opaque
Colour:
Black
Hardness:
Hardness:
VHN50=32.7 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Density:
9.05 g/cm3 (Calculated)

Optical Data of FischesseriteHide

Reflectivity:
WavelengthR
420nm33.4%
440nm33.6%
460nm33.1%
480nm32.3%
500nm31.3%
520nm30.1%
540nm29.7%
560nm29.9%
580nm31.0%
600nm32.0%
620nm32.9%
640nm33.8%
660nm34.7%
680nm35.4%
700nm36.0%

Reflectance graph
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 FischesseriteHide

Mindat Formula:
Ag3AuSe2
Common Impurities:
Cu

Crystallography of FischesseriteHide

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 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Massive, xenomorphic grains

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0005994FischesseriteBindi 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 1733-17372004De Lamar mine, Owyhee County, Idaho, USA0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.08 Å(60)
3.50 Å(10)
3.15 Å(30)
2.877 Å(40)
2.662 Å(100)
2.349 Å(50)
2.29 Å(80)
2.035 Å(80)
1.954 Å(60)
1.820 Å(80)
1.763 Å(20)
1.708 Å(10)
1.501 Å(40)
1.469 Å(50)
1.439 Å(40)
1.410 Å(30)
1.382 Å(30)
1.332 Å(60)
1.266 Å(70)
1.246 Å(30)
1.227 Å(20)
1.159 Å(20)
1.130 Å(30)
Comments:
ICDD 25-367

Geological EnvironmentHide

Paragenetic Mode(s):

Type Occurrence of FischesseriteHide

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., Kvaček, 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 FischesseriteHide

Other Language Names for FischesseriteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
11 photos of Fischesserite associated with GoldAu
10 photos of Fischesserite associated with ClausthalitePbSe
5 photos of Fischesserite associated with ChrisstanleyiteAg2Pd3Se4
4 photos of Fischesserite associated with CerussitePbCO3
4 photos of Fischesserite associated with ChlorargyriteAgCl
3 photos of Fischesserite associated with KlockmanniteCuSe
3 photos of Fischesserite associated with NaumanniteAg2Se
2 photos of Fischesserite associated with EucairiteAgCuSe
2 photos of Fischesserite associated with CalciteCaCO3
2 photos of Fischesserite associated with Penroseite(Ni,Co,Cu)Se2

Related Minerals - Strunz-mindat GroupingHide

2.BA.Orileyite(Fe,Cu)2As
2.BA.AlburniteAg8GeTe2S4Iso.
2.BA.DzierĆŒanowskiteCaCu2S2Trig. 3m (3 2/m) : P3m1
2.BA.MakotoiteAg12(Cu3Au)S8Trig. 3m (3 2/m) : R3c
2.BA.XuwenyuaniteAg9Fe3+Te2S4Iso. 4 3m : F4 3m
2.BA.05ChalcociteCu2SMon. 2/m : P21/b
2.BA.05DjurleiteCu31S16Mon. 2/m
2.BA.05GeeriteCu8S5Trig. 3
2.BA.05RoxbyiteCu9S5Tric. 1 : P1
2.BA.10AniliteCu7S4Orth. mmm (2/m 2/m 2/m) : Pnma
2.BA.10DigeniteCu9S5Trig. 3m (3 2/m) : R3m
2.BA.15BorniteCu5FeS4Orth. mmm (2/m 2/m 2/m) : Pbca
2.BA.20BellidoiteCu2SeTet. 4/m : P42/n
2.BA.20BerzelianiteCu2-xSe (x ≈ 0.12)Iso. m3m (4/m 3 2/m) : Fm3m
2.BA.25AthabascaiteCu5Se4Orth.
2.BA.25UmangiteCu3Se2Tet. 4 2m : P4 21m
2.BA.30RickarditeCu7Te5Orth. mmm (2/m 2/m 2/m) : Pmmn
2.BA.30WeissiteCu2-xTeHex. 6/mmm (6/m 2/m 2/m) : P6/mmm
2.BA.35AcanthiteAg2SMon. 2/m : P21/m
2.BA.35SpryiteAg8(As3+0.5As5+0.5)S6Orth. mm2 : Pna21
2.BA.40MckinstryiteAg5-xCu3+xS4Orth. mmm (2/m 2/m 2/m) : Pnma
2.BA.40StromeyeriteAgCuSOrth. mmm (2/m 2/m 2/m)
2.BA.40dUM2003-13-S:AgAuCuAg6AuCu2S5
2.BA.42HoneaiteAu3TlTe2 Orth. mmm (2/m 2/m 2/m) : Pbcm
2.BA.45JalpaiteAg3CuS2Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
2.BA.45KuriliteAg8Te3SeTrig. 3 : R3
2.BA.45SelenojalpaiteAg3CuSe2Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
2.BA.47Spiridonovite(Cu1-xAgx)2TeTrig. 3m (3 2/m) : P3c1
2.BA.50EucairiteAgCuSeOrth.
2.BA.50WuyanzhiiteCu2STet. 4 2 2 : P43 21 2
2.BA.52ArgentiteAg2SIso.
2.BA.55AguilariteAg4SeSMon. 2/m
2.BA.55NaumanniteAg2SeOrth. 2 2 2 : P21 21 21
2.BA.60CervelleiteAg4TeSMon. 2/m
2.BA.60HessiteAg2TeMon. 2/m : P21/b
2.BA.60ChenguodaiteAg9Fe3+Te2S4Orth.
2.BA.65Henryite(Cu,Ag)3+xTe2 , with x ~ 0.40 Iso. m3m (4/m 3 2/m) : Fd3c
2.BA.65StĂŒtziteAg5-xTe3, x = 0.24-0.36Hex. 6 : P6
2.BA.70ArgyroditeAg8GeS6Orth. mm2 : Pna21
2.BA.70CanfielditeAg8SnS6Orth. mm2
2.BA.70Putzite(Cu4.7Ag3.3)GeS6Iso. 4 3m : F4 3m
2.BA.75Penzhinite(Ag,Cu)4Au(S,Se)4Hex. 6 2 2 : P63 2 2
2.BA.75PetrovskaiteAuAgSMon.
2.BA.75PetziteAg3AuTe2Iso. 4 3 2 : I41 3 2
2.BA.75UytenbogaardtiteAg3AuS2Trig. 3m (3 2/m) : R3c
2.BA.80Bezsmertnovite(Au,Ag)4Cu(Te,Pb)Orth.
2.BA.80BilibinskitePbCu2Au3Te2Iso.
2.BA.80Bogdanovite(Au,Te,Pb)3(Cu,Fe)Iso.

Fluorescence of FischesseriteHide

Not fluorescent in UV

Other InformationHide

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 FischesseriteHide

References for FischesseriteHide

Localities for FischesseriteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - 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.
Argentina
 
  • La Rioja Province
    • Chilecito department
      • Sañogasta
M.K. de Brodtkorb (ed.)
Minerales de la Republica Argentina
    • General Lamadrid Department
Marquez-Zavalia et al. (2021)
      • Villa Castelli
        • Sierra de Cacho
DE BRODTKORB +1 other reference
Recursos Minerales de la Republica ...
Austria
 
  • Vorarlberg
    • Bludenz District
      • LorĂŒns
Kolitsch et al. (2020)
Brazil
 
  • ParĂĄ
    • CurionĂłpolis
Berni et al. (2014) +1 other reference
Canada
 
  • Newfoundland and Labrador
    • Newfoundland
      • Burin Peninsula
Sparkes et al. (2016)
  • Ontario
    • Cochrane District
      • Timmins
        • Kidd Township
Thorpe et al. (1976) +2 other references
Chile
 
  • Antofagasta
    • Antofagasta Province
      • Antofagasta
        • Escondida
          • La Escondida Mine
Gibbons (2018)
  • Atacama
    • Chañaral Province
      • Salitrosa-Porvenir mining district
Extra Lapis English No. 5 Gold
China
 
  • Yunnan
    • Pu'er
      • Mojiang County
Yuan Li (1998)
Czech Republic (TL)
 
  • South Bohemian Region
    • PĂ­sek District
      • Kováƙov
        • Pƙedboƙice
Bull.Soc.fr.Min.Crist. (1971) +1 other reference
  • Vysočina Region
    • ĆœÄĂĄr nad SĂĄzavou District
      • RoĆŸnĂĄ
        • RoĆŸnĂĄ deposit
StrĂŒbel
Japan
 
  • Hokkaidƍ Prefecture
    • Ishikari Subprefecture
      • Sapporo City
ç”°äž­ćŽ‡èŁ•ăƒ»æż±æ čć€§èŒ”: ...
  • Ishikawa Prefecture
    • Hakui District
      • Shika-machi
Hamada et al. (2022)
Mexico
 
  • Guanajuato
    • Guanajuato Municipality
      • Guanajuato
Solana Espinosa +2 other references
New Zealand
 
  • Waikato Region
    • Thames-Coromandel District
      • Hikuai
Cocker et al. (2013)
Peru
 
  • Arequipa
    • Condesuyos Province
      • Rio Grande district
Alfonso et al. (2023)
Russia
 
  • Chukotka Autonomous Okrug
    • Anadyrsky District
N.E. Savva et al. (2012) +1 other reference
    • Okhotsk-Chukotka belt
Kolova et al. (2021)
  • Kamchatka Krai
    • Koryak Okrug
      • Karaginsky District
        • Maletoyvayam ore field
Kasatkin et al. (2023) +1 other reference
Spiridonov et al. (2009, April) +1 other reference
  • Republic of Karelia
    • Segezhsky District
Kuleshevich et al. (2012)
  • Tuva
    • Sut-Kholsky District
      • Aldan-Maadyr ore cluster
Kuzhuget et al. (2015)
Kuzhuget et al. (2022)
Sweden
 
  • Östergötland County
    • Valdemarsvik
Sandström (2007)
UK
 
  • England
    • Devon
      • Torbay
        • Torquay
Stanley et al. (1990) +1 other reference
USA
 
  • Idaho
    • Owyhee County
      • De Lamar Mining District
Extra Lapis English No. 5 Gold
      • Silver City Mining District (Carson Mining District)
Collins (2012)
  • Nevada
    • Elko County
      • Gold Circle Mining District (Midas Mining District)
Castor et al. (2004)
Castor et al. (2004)
Castor et al. (2004)
Tharalson +5 other references
  • Washington
    • Chelan County
      • Wenatchee Mining District
Lasmanis (1995)
 
Mineral and/or Locality  
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