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Aramayoite

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Julcani District, Angaraes Province, Huancavelica Department, Peru
© 2005 M. Kampf

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Formula:
Ag(Sb,Bi)S
 
2
System:TriclinicColour:Iron-black; deep red ...
Hardness:2½
Name:Named after Don Felix Avelino Aramayo (1846 - 1929), formerly Managing Director of the Compagnie Aramayo de Mines en Bolivie.
This page provides mineralogical data about Aramayoite.

Classification of Aramayoite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:2/C.16-20
Nickel-Strunz 10th (pending) edition ID: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)
Dana 8th edition ID:3.7.4.1

3 : SULFOSALTS
7 : ø = 2
Hey's CIM Ref.: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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Type Occurrence of Aramayoite

Type Locality:Animas Mine, Atocha-Quechisla District, Sud Chichas Province, Potosí Department, Bolivia
Year of Discovery:1926

Occurrences of Aramayoite

Geological Setting:Hydrothermal silver tin ores.

Physical Properties of Aramayoite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Iron-black; deep red (transmitted light)
Streak:Black
Hardness (Mohs):2½
Tenacity:Sectile
Cleavage:Perfect
{010} perfect; {100} fair; {001} poor.
Parting:{101} frequent.
Density (measured):5.602 g/cm3
Density (calculated):5.624 g/cm3

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
Unit Cell Volume:V 542.40 ų (Calculated from Unit Cell)
Z:6
Morphology:Thin plates
Twinning:About [_101] with composition plane near {_101}
Crystal Atlas:
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Aramayoite - Tabular {010}

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The mindat.org Crystal Atlas allows you to view a selection of crystal drawings of real and idealised crystal forms for this mineral and, in certain cases, 3d rotating crystal objects. You need Java to see these. You can download Java for free - click here to download Java

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Optical Data of Aramayoite

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

Chemical Properties of Aramayoite

Formula:
Ag(Sb,Bi)S
 
2
Essential elements:Ag, S, Sb
All elements listed in formula:Ag, Bi, S, Sb
Common Impurities:Cu,Fe

Relationship of Aramayoite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.HA.05Chalcostibite
CuSbS
 
2
2.HA.05Emplectite
CuBiS
 
2
2.HA.10Miargyrite
AgSbS
 
2
2.HA.20Berthierite
FeSb
 
2
S
 
4
2.HA.20Garavellite
FeSbBiS
 
4
2.HA.20Clerite
MnSb
 
2
S
 
4
2.HA.25Baumstarkite
AgSbS
 
2
Related Minerals - Hey's Index Grouping:

- +
5.2.1Smithite
AgAsS
 
2
5.2.2Trechmannite
AgAsS
 
2
5.2.3Proustite
Ag
 
3
AsS
 
3
5.2.4Xanthoconite
Ag
 
3
AsS
 
3
5.2.5Pearceite
[(Ag,Cu)
 
6
(As,Sb)
 
2
S
 
7
][Ag
 
9
CuS
 
4
]
5.2.6Pearceite-T2ac
5.2.7Argentotennantite
(Ag,Cu)
 
10
(Zn,Fe)
 
2
(As,Sb)
 
4
S
 
13
5.2.8Miargyrite
AgSbS
 
2
5.2.9Pyrargyrite
Ag
 
3
SbS
 
3
5.2.10Pyrostilpnite
Ag
 
3
SbS
 
3
5.2.11Stephanite
Ag
 
5
SbS
 
4
5.2.12Polybasite
[(Ag,Cu)
 
6
(Sb,As)
 
2
S
 
7
][Ag
 
9
CuS
 
4
]
5.2.13Billingsleyite
Ag
 
7
AsS
 
6
5.2.14Polybasite-Tac
5.2.15Freibergite
(Ag
 
4+2x
Cu
 
2-2x
)[(Cu, Ag)
 
4
(Fe, Zn)
 
2
]Sb
 
4
S
 
12
S
 
1-x
 (0 < x < 1)
5.2.17Matildite
AgBiS
 
2
5.2.18Schapbachite
AgBiS
 
2
5.2.19Pavonite
(Ag,Cu)(Bi,Pb)
 
3
S
 
5
5.2.20Arcubisite
Ag
 
6
CuBiS
 
4
5.2.21Bohdanowiczite
AgBiSe
 
2
5.2.22Selenostephanite
Ag
 
5
Sb(Se,S)
 
4
5.2.23Benleonardite
Ag
 
8
(Sb,As)Te
 
2
S
 
3
5.2.24Volynskite
AgBiTe
 
2

Other Names for Aramayoite

Other Languages:
German:Aramayoit
Russian:Арамайоит
Spanish:Aramayoita

Other Information

Health Warning: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.

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

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    Localities for Aramayoite

    Hide Locality List
    The 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. ? 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
    Brodtkorb (2002): Las Especies Minerales de la Republica Argentina
    Bolivia
     
    • Potosí Department
      • Sud Chichas Province
        • Atocha-Quechisla District
    		[MinRec 32:461]
    [MinRec 32:461]
    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
    France
     
    • Alsace
      • Haut-Rhin
        • Ste Marie-aux-Mines (Markirch)
    		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 Island
      • Ishikari Province
    		Mineral.Journ.Japan (1985) 12, 341-348
    • Honshu Island
      • Tohoku Region
        • Miyagi Prefecture
    		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)
    Russia
     
    • Eastern-Siberian Region
      • Saha Republic (Sakha 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
      • Eastern Slovenské Rudohorie Mts
        • Rožňava (Rozsnyo; Rosenau) Mining District
    		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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