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Aramayoite

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Formula:
Ag(Sb,Bi)S2
System:
Triclinic
Colour:
Iron-black; deep red ...
Hardness:
Name:
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.

Classification of Aramayoite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
2.HA.25

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)
3.7.4.1

3 : SULFOSALTS
7 : ø = 2
5.2.16

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

Year of Discovery:
1926

Occurrences of Aramayoite

Geological Setting:
Hydrothermal silver tin ores.

Physical Properties of Aramayoite

Metallic
Diaphaneity (Transparency):
Opaque
Colour:
Iron-black; deep red (transmitted light)
Streak:
Black
Hardness (Mohs):
Tenacity:
Sectile
Cleavage:
Perfect
{010} perfect; {100} fair; {001} poor.
Parting:
{101} frequent.
Density:
5.602 g/cm3 (Measured)    5.624 g/cm3 (Calculated)

Crystallography of Aramayoite

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 7.74Å, b = 8.84Å, c = 8.32Å
α = 100.7°, β = 90°, γ = 103.9°
Ratio:
a:b:c = 0.876 : 1 : 0.941
Z:
6
Morphology:
Thin plates
Twinning:
About [_101] with composition plane near {_101}

Crystallographic forms of Aramayoite

Crystal Atlas:
Image Loading
Click on an icon to view
Aramayoite - Tabular {010}
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
3.43 (20)
3.21 (40)
2.806 (100)
2.048 (20)
1.940 (30)
1.705 (20)
1.402 (20)

Optical Data of Aramayoite

Type:
Anisotropic
Anisotropism:
Very high in oil
Reflectivity:
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:
White
Internal Reflections:
Red
Pleochroism:
Visible
Comments:
Distinct in oil

Chemical Properties of Aramayoite

Formula:
Ag(Sb,Bi)S2
Essential elements:
All elements listed in formula:
Analytical Data:
Animas mine, Chocaya, Potosí, Bolivia.
Ag (34.74)
Cu (0.53)
Fe (trace)
Sb (29.95)
Bi (13.75)
S (20.87)
Total (99.84)
Empirical Formula:
(Ag2.97Cu0.07)Sb2.00(Bi0.61Sb0.27)S6.00
Common Impurities:
Cu,Fe

Relationship of Aramayoite to other Species

2.HA.05ChalcostibiteCuSbS2
2.HA.05EmplectiteCuBiS2
2.HA.10MiargyriteAgSbS2
2.HA.20BerthieriteFeSb2S4
2.HA.20GaravelliteFeSbBiS4
2.HA.20CleriteMnSb2S4
2.HA.25BaumstarkiteAgSbS2
5.2.1SmithiteAgAsS2
5.2.2TrechmanniteAgAsS2
5.2.3ProustiteAg3AsS3
5.2.4XanthoconiteAg3AsS3
5.2.5Pearceite[(Ag,Cu)6(As,Sb)2S7][Ag9CuS4]
5.2.6Pearceite-T2ac
5.2.7ArgentotennantiteAg6[Cu4(Fe,Zn)2]As4S13
5.2.8MiargyriteAgSbS2
5.2.9PyrargyriteAg3SbS3
5.2.10PyrostilpniteAg3SbS3
5.2.11StephaniteAg5SbS4
5.2.12Polybasite[(Ag,Cu)6(Sb,As)2S7][Ag9CuS4]
5.2.13BillingsleyiteAg7AsS6
5.2.14Polybasite-Tac
5.2.15FreibergiteAg6[Cu4Fe2]Sb4S13-x
5.2.17MatilditeAgBiS2
5.2.18SchapbachiteAg0.4Pb0.2Bi0.4S
5.2.19Pavonite(Ag,Cu)(Bi,Pb)3S5
5.2.20ArcubisiteAg6CuBiS4
5.2.21BohdanowicziteAgBiSe2
5.2.22SelenostephaniteAg5Sb(Se,S)4
5.2.23BenleonarditeAg8(Sb,As)Te2S3
5.2.24VolynskiteAgBiTe2

Other Names for Aramayoite

Name in Other Languages:
German:Aramayoit
Simplified Chinese:硫铋锑银矿
Spanish:Aramayoita

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 Aramayoite

Reference List:
Spencer (1926), Mineralogical Magazine: 21: 156.

American Mineralogist (1927): 12: 265.

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: 427-429.

Graham, A.R. (1951): Matildite, aramayoite, miargyrite. American Mineralogist, 36, 436–449.

Effenberger, H., Paar, W.H., Topa, D., Criddle, A.J., and Fleck, M. (2002) The new mineal baumstarkite and a structural reinvestigation of aramayoite and miargyrite. American Mineralogist: 87: 753-764.

Internet Links for Aramayoite

Localities for Aramayoite

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
 
  • Jujuy
    • Rinconada Department
Milka K. de Brodtkorb (1973) 5th Congreso Geologico Argentino 1:63-68, Cordoba.
  • Salta
    • El Quevar
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
Brodtkorb (2002): Las Especies Minerales de la Republica Argentina
    • Incahuasi Valley
ROBL, Klaus; BRODTKORB, Milka K.de 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
    • Macizo del Deseado
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.
Bolivia
 
  • Potosí Department
    • Sud Chichas Province
      • Atocha-Quechisla District
        • Chocaya-Animas (Animas-Chocaya)
[MinRec 32:461]
[MinRec 32:461]
Kempff, O., Paar, W.H., Tawackoli, S.: "Minerales de Bolivia", 115pp (La Paz, 2009)
Chile
 
  • 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
China
 
  • 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
France
 
  • Alsace
    • Haut-Rhin
      • Ste Marie-aux-Mines (Markirch)
        • Neuenberg
Wittern, Journée: "Mineralien finden in den Vogesen", von Loga (Cologne), 1997
  • Limousin
    • Haute-Vienne
      • Saint-Yrieix-la-Perche
Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990
  • Pays de 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.
Japan
 
  • 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
Peru
 
  • Huancavelica Department
    • Angaraes Province
Min.Rec. 28, no.4 (1997)
Poland
 
  • Lower Silesia (Dolnośląskie)
    • Kłodzko District
Eligiusz Szełęg collection (SEM/EDS identification)
Russia
 
  • 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
Slovakia
 
  • Košice Region
    • Rožňava Co.
      • Rožňava (Rosenau; Rozsnyó)
Pauliš P., Ďuďa R., 2002:Nejznámejší mineralogická nalezište Slovenska. Kuttna, Kutná Hora, 136p
Tajikistan
 
  • 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.
USA
 
  • 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
www.cannonmicroprobe.com/Mineral_Specimens.htm
Mineral and/or Locality  
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