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End-member formula: Ag3Sb2BiS6. Formerly given as Ag(Sb,Bi)S2.
Iron-black; deep red (transmitted light)
Specific Gravity:
Crystal System:
Named after Don Felix Avelino Aramayo (1846 - 1929), formerly Managing Director of the Compagnie Aramayo de Mines en Bolivie.
Isostructural with:
This page provides mineralogical data about Aramayoite.

Hide all sections | Show all sections

Classification of AramayoiteHide

Approved, 'Grandfathered' (first described prior to 1959)

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
A : With Cu, Ag, Fe (without Pb)

7 : ø = 2

5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
2 : Sulpharsenites etc. of Ag

Physical Properties of AramayoiteHide

Iron-black; deep red (transmitted light)
2½ on Mohs scale
{010} perfect; {100} fair; {001} poor.
{101} frequent.
5.602 g/cm3 (Measured)    5.624 g/cm3 (Calculated)

Optical Data of AramayoiteHide

Very high in oil
400nmR1=38.9%R2= 43.4%
420nmR1=38.8%R2= 42.5%
440nmR1=38.5%R2= 41.9%
460nmR1=38.4%R2= 41.6%
480nmR1=38.2%R2= 41.1%
500nmR1=38.0%R2= 40.9%
520nmR1=37.8%R2= 40.5%
540nmR1=37.5%R2= 40.2%
560nmR1=37.3%R2= 40.0%
580nmR1=37.1%R2= 40.1%
600nmR1=37.0%R2= 40.1%
620nmR1=36.7%R2= 39.9%
640nmR1=36.6%R2= 39.5%
660nmR1=36.2%R2= 39.1%
680nmR1=36.1%R2= 39.0%
700nmR1=36.3%R2= 39.8%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 43.4%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Internal Reflections:
Distinct in oil

Chemical Properties of AramayoiteHide


End-member formula: Ag3Sb2BiS6. Formerly given as Ag(Sb,Bi)S2.
Common Impurities:

Crystallography of AramayoiteHide

Crystal System:
Class (H-M):
1 - Pinacoidal
Space Group:
Cell Parameters:
a = 7.74 Å, b = 8.84 Å, c = 8.32 Å
α = 100.7°, β = 90°, γ = 103.9°
a:b:c = 0.876 : 1 : 0.941
Unit Cell V:
542.40 ų (Calculated from Unit Cell)
Thin plates
About [_101] with composition plane near {_101}

Crystallographic forms of AramayoiteHide

Crystal Atlas:
Image Loading
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Aramayoite - Tabular {010}
3d models and HTML5 code kindly provided by

Edge Lines | Miller Indicies | Axes

Opaque | Translucent | Transparent

Along a-axis | Along b-axis | Along c-axis | Start rotation | Stop rotation

X-Ray Powder DiffractionHide

Powder Diffraction Data:
3.43 (20)
3.21 (40)
2.806 (100)
2.048 (20)
1.940 (30)
1.705 (20)
1.402 (20)

Type Occurrence of AramayoiteHide

Other Language Names for AramayoiteHide

Simplified Chinese:硫铋锑银矿

Common AssociatesHide

Associated Minerals Based on Photo Data:
Geocronite4 photos of Aramayoite associated with Geocronite on
Eskimoite2 photos of Aramayoite associated with Eskimoite on
Pyrite2 photos of Aramayoite associated with Pyrite on
Quartz2 photos of Aramayoite associated with Quartz on
Jordanite2 photos of Aramayoite associated with Jordanite on
Proustite1 photo of Aramayoite associated with Proustite on
Kobellite1 photo of Aramayoite associated with Kobellite on

Related Minerals - Nickel-Strunz GroupingHide

2.HA.05ChalcostibiteCuSbS2Orth. mmm (2/m 2/m 2/m)
2.HA.05EmplectiteCuBiS2Orth. mmm (2/m 2/m 2/m) : Pmna
2.HA.10MiargyriteAgSbS2Mon. 2/m : B2/b
2.HA.20BerthieriteFeSb2S4Orth. mmm (2/m 2/m 2/m)
2.HA.25BaumstarkiteAg3Sb3S6Tric. 1 : P1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

5.2.1SmithiteAgAsS2Mon. 2/m
5.2.3ProustiteAg3AsS3Trig. 3m (3 2/m) : R3c
5.2.4XanthoconiteAg3AsS3Mon. 2/m : B2/b
5.2.5Pearceite[Ag9CuS4][(Ag,Cu)6(As,Sb)2S7]Trig. 3m (3 2/m) : P3m1
5.2.6Pearceite-T2acTrig. 3 2 : P3 2 1
5.2.7ArgentotennantiteAg6[Cu4(Fe,Zn)2]As4S13Iso. 4 3m : I4 3m
5.2.8MiargyriteAgSbS2Mon. 2/m : B2/b
5.2.9PyrargyriteAg3SbS3Trig. 3m : R3c
5.2.10PyrostilpniteAg3SbS3Mon. 2/m : P21/b
5.2.11StephaniteAg5SbS4Orth. mm2 : Cmc21
5.2.12Polybasite[(Ag,Cu)6(Sb,As)2S7][Ag9CuS4]Mon. 2/m : B2/m
5.2.13BillingsleyiteAg7AsS6Iso. 2 3 : P21 3
5.2.14Polybasite-TacTrig. 3m (3 2/m) : P3m1
5.2.15FreibergiteAg6[Cu4Fe2]Sb4S13-xIso. 4 3m : I4 3m
5.2.17MatilditeAgBiS2Trig. 3m (3 2/m) : P3m1
5.2.19PavoniteAgBi3S5Mon. 2/m : B2/m
5.2.21BohdanowicziteAgBiSe2Trig. 3m (3 2/m) : P3m1
5.2.23Benleonardite[Ag6(Sb,As)2S6Te] [Ag9Cu(S,Te)2Te2]Trig. 3m (3 2/m) : P3m1

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.

References for AramayoiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Spencer, L.J., Mountain, E.D. (1926) Aramayoite, a new mineral, from Bolivia. Mineralogical Magazine: 21: 156-162.
Foshag, W.F. (1927) New mineral names. American Mineralogist: 12: 265-266.
Palache, C., Berman, H., Frondel, C. (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: 427-429.
Graham, A.R. (1951) Matildite, aramayoite, miargyrite. American Mineralogist: 36: 436–449.
Mullen, D.J.E., Nowacki, W. (1974) The crystal structure of aramayoite Ag(Sb,Bi)S2. Zeitschrift für Kristallographie: 139: 54-69.
Effenberger, H., Paar, W.H., Topa, D., Criddle, A.J., Fleck, M. (2002) The new mineal baumstarkite and a structural reinvestigation of aramayoite and miargyrite. American Mineralogist: 87: 753-764.

Internet Links for AramayoiteHide

Localities for AramayoiteHide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Jujuy
    • Rinconada Department
Milka K. de Brodtkorb (1973) 5th Congreso Geologico Argentino 1:63-68, Cordoba.
  • Salta
    • Los Andes department
      • El Quevar mining district
Brodtkorb (2002): Las Especies Minerales de la Republica Argentina
        • Incahuasi Valley
Herta Effenberger, Werner Hermann Paar, Dan Topa, Alan J. Criddle and Michel Fleck (2002) The new mineral baumstarkite and a structural reinvestigation of aramayoite and miargyrite American Mineralogist, 87(5-6):753-764; ROBL, Klaus; BRODTKORB, Milka and AMETRANO, Silvia. The Miocene epithermal mineralization of the Quevar Stratovolcan Complex, Salta. Rev. Asoc. Geol. Argent. [online]. 2009, vol.64, n.3, pp. 525-539
  • Santa Cruz
    • Deseado department
      • Deseado massif
        • Tres Cerros
Jovic, S.M., Guido, D.M., Schalamuk, I.B., Ríos, F.J., Tassinari, C.C.G., Recio. C. (2011): Pingüino In-bearing polymetallic vein deposit, Deseado Massif, Patagonia, Argentina: characteristics of mineralization and ore-forming fluids. Mineralium Deposita, 46, 257-271.
  • Salzburg
    • Lungau
      • Ramingstein
Handbook of Mineralogy
Bolivia (TL)
  • Potosí Department
    • Sud Chichas Province
      • Atocha-Quechisla District
        • Chocaya-Animas (Animas-Chocaya)
[MinRec 32:461]
            • Colorada vein
Topa, D., Paar, W.H., Makovicky, E., Stanley, C.J., Roberts, A.C. (2016): Oscarkempffite, Ag10Pb4(Sb17Bi9)Σ26S48, a new Sb-Bi member of the lillianite homologous series. Mineralogical Magazine, 80, 809-817
[MinRec 32:461]
Kempff, O., Paar, W.H., Tawackoli, S.: "Minerales de Bolivia", 115pp (La Paz, 2009)
  • Arica and Parinacota Region
    • Parinacota Province
      • Ticnamar area
Cecioni A, Cornejo C, Ruz L.; Choquelimpie, un yacimiento epitermal", Actas n. 1 del Congreso Geológico Chileno, pag.181/183, agosto 2000; Econ Geol (1991) 86:1206-1221
  • Coquimbo Region
    • Elqui Province
Handbook of Mineralogy
  • Guangxi Zhuang Autonomous Region
    • Hechi Prefecture
      • Nandan Co.
        • Dachang Sn-polymetallic ore field
Yingchen Ren (1999): Contributions to Geology and Mineral Resources Research 14(1), 1-12, 38
  • Inner Mongolia Autonomous Region
    • Hulunbuir League (Hulunbei'er Prefecture)
      • New Barag Right Banner (Xin Barag Youqi)
Zhicheng Lu, Peiping Zhang, Guozheng Duan, Libo Hao, and Dianchao Li (2002): Acta Mineralogica Sinica 22(1), 75-80
  • Jiangxi Province
    • Ganzhou Prefecture
      • Yudu Co.
        • Yinkeng polymetallic ore field
Mingxing Shi and Guirong Gao (2006): Resources Survey and Environment 27(2), 164-172
Czech Republic
  • Bohemia (Böhmen; Boehmen)
    • Central Bohemia Region
Pažout, R., Sejkora, J., Šrein, V. (2017): Bismuth and bismuth–antimony sulphosalts from Kutná Hora vein Ag–Pb–Zn ore district, Czech Republic. Journal of Geosciences 62, 59-76.
Pazout, R., Sejkora, J., & Srein, V. (2017). Bismuth and bismuth-antimony sulphosalts from Kutna Hora vein Ag-Pb-Zn ore district, Czech Republic. Journal of GEOsciences, 62(1), 59-76.
  • Grand Est
    • Haut-Rhin
      • Ste Marie-aux-Mines (Markirch)
P&T N°23-24, H. BARI 1982, Minéralogie des filons du Neuenberg à Sainte Marie aux Mines (Haut-Rhin).
          • Sankt Jakob vein
Wittern, Journée: "Mineralien finden in den Vogesen", von Loga (Cologne), 1997
  • Nouvelle-Aquitaine
    • Haute-Vienne
      • Saint-Yrieix-la-Perche
Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990
  • Pays de la Loire
    • Vendée
      • Les Herbiers
Y. Moëlo, E. Makovicky and S. Karup-Moller : "Sulfures complexes plombo-argentifères : minéralogie et cristallochimie de la série andorite-fizelyite", Documents du BRGM N° 167, 1989.
  • Hokkaido
    • Ishikari Province
Mineral.Journ.Japan (1985) 12, 341-348
  • Honshu Island
    • Tohoku Region
      • Miyagi Prefecture
        • Kurihara
The Mineral Species of Japan (5th ed) Matsubara
      • Yamagata Prefecture
The Mineral Species of Japan (5th ed) Matsubara
  • Huancavelica Department
    • Angaraes Province
Crowley, Jack A., Currier, Rock H., & Szenics, Terry (1997) Mines and Minerals of Peru. Mineralogical Record, Vol.28, No.4. 98p.
Handbook of Mineralogy
    • Castrovirreyna Province
      • Castrovirreyna District
Handbook of Mineralogy
  • Lower Silesia (Dolnośląskie)
    • Kłodzko District
      • Stronie Śląskie commune
Eligiusz Szełęg collection (SEM/EDS identification)
  • Eastern-Siberian Region
    • Sakha Republic (Saha Republic; Yakutia)
      • Indigirka River Basin
        • Ust'-Nera
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; American Mineralogist, Volume 79, pages 763-767, 1994
  • Košice Region
    • Rožňava Co.
      • Rožňava (Rosenau; Rozsnyó)
Pauliš P., Ďuďa R., 2002:Nejznámejší mineralogická nalezište Slovenska. Kuttna, Kutná Hora, 136p
  • Viloyati Mukhtori Gorno-Badakhshan (Viloyati Badakhshoni Kuni)
    • Pamir Mts
      • Pamir Silver District
        • Bazardara ore cluster
Pavlova, G.G., and Borisenko, A.S. (2009): Ore Geology Reviews 35, 164-185.
Pavlova, G.G., and Borisenko, A.S. (2009): Ore Geology Reviews 35, 164-185.
  • Alaska
    • Bethel Borough
      • Aniak District
U.S. Geological Survey, 2008, Alaska Resource Data File (ARDF): U.S. Geological Survey Open-File Report 2008-1225.
  • Montana
    • Flathead Co.
      • Hog Heaven District (Flathead District)
        • Kofford Ridge
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