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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, 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

Physical Properties of Aramayoite

Diaphaneity (Transparency):Translucent on thin edges
Colour:Iron-black; deep red (transmitted light)
Streak:Black
Hardness (Mohs):2½
Tenacity:Sectile
Cleavage:Perfect
{010} perfect; {100} fair; {001} poor.
Parting:{1¯01} 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)
Crystal Atlas:
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Aramayoite - Tabular {010}

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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.15Livingstonite
HgSb
 
4
S
 
8
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)
 
16
(As,Sb)
 
2
S
 
11
5.2.6Pearceite-T2ac
(Ag,Cu)
 
16
(As,Sb)
 
2
S
 
11
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)
 
16
(Sb,As)
 
2
S
 
11
5.2.13Billingsleyite
Ag
 
7
AsS
 
6
5.2.14Polybasite-Tac
(Ag,Cu)
 
16
(Sb,As)
 
2
S
 
11
5.2.15Freibergite
(Ag,Cu,Fe)
 
12
(Sb,As)
 
4
S
 
13
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

German names:
Aramayoit
Russian names:
Арамайоит
Spanish names:
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

    (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
    • 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
    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
     
    • 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
    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
    USA
     
    • Montana
      • Flathead Co.
        • Hog Heaven District (Flathead District)
          • Kofford Ridge
    		www.cannonmicroprobe.com/Mineral_Specimens.htm
    Mineral and/or Locality
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