Aramayoite Mineral Data + Say ARAMAYOITE


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General Aramayoite Information
Help on Chemical Formula: Chemical Formula: Ag3Sb2(Sb,Bi)S6
Help on Composition: Composition: Molecular Weight = 924.87 gm
   Silver    34.99 %  Ag
   Bismuth   11.30 %  Bi
   Antimony  32.91 %  Sb
   Sulfur    20.80 %  S
            ______ 
            100.00 % 
Help on Empirical Formula: Empirical Formula: Ag3Sb2.5Bi0.5S6
Help on Environment: Environment: In vein-controlled hydrothermal tin and silver ores.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1926
Help on Locality: Locality: In the Animas mine, Chocaya, Sud-Chichas, Potosi, Bolivia. From Herminia, Julcani district; and in the San Genaro mine, Huancavelica, Peru. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Felix Avelino Aramayo, former Managing Director of the Compagnie Aramayo de Mines en Bolivie.
Help on Synonym: Synonym: ICSD 8165
  PDF 4-696
 

Aramayoite Image

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Aramayoite   Miargyrite

Comments: Aramayoite is present as large thin plates (blue iridescence) to 1mm in massive gray miargyrite matrix.
Location: Julcani Silver mine, Huancavelica Dept., Peru. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Aramayoite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.9449:1:1.074
Help on Cell Dimensions: Cell Dimensions: a = 7.813, b = 8.268, c = 8.88, Z = 2; alpha = 100.32°, beta = 104.07°, gamma = 90.18° V = 547.42 Den(Calc)= 5.61
Help on Crystal System: Crystal System: Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.82(1), 3.22(0.4), 1.94(0.3),
Help on Forms: Forms:

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Forms: [ 1 2 2] [ 0 1 0] [ 3 2 0] [ 2 0 1] [ 1 1 0] [ 0 0 1]

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Click Here for Large Aramayoite Structure Window Crystal Structure:

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

 

Physical Properties of Aramayoite

Help on Cleavage: Cleavage: [???] Perfect, [???] Indistinct, [???] Indistinct
Help on Color: Color: Iron black, Deep blood red.
Help on Density: Density: 5.6
Help on Diaphaniety: Diaphaniety: Opaque
Help on Fracture: Fracture: Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Help on Habit: Habit: Pseudo Tetragonal - Crystals show a tetragonal shape.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Metallic
Help on Streak: Streak: black
 

Optical Properties of Aramayoite

Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Aramayoite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   38.90   43.40 
   
 420 nm   38.85   42.50 
 440 nm   38.50   41.90 
 460 nm   38.40   41.60 
 480 nm   38.20   41.10 
 500 nm   38.05   40.90 
 520 nm   37.80   40.50 
 540 nm   37.50   40.25 
 560 nm   37.30   40.05 
 580 nm   37.10   40.10 
 600 nm   37.00   40.10 
 620 nm   36.70   39.90 
 640 nm   36.60   39.50 
 660 nm   36.20   39.10 
 680 nm   36.10   39.00 
 700 nm   36.30   39.80 
Standardized Intensity (100%) Reflection Spectra of Aramayoite in Oil
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   23.60   25.92 
   
 420 nm   23.70   26.20 
 440 nm   23.40   26.10 
 460 nm   23.00   25.50 
 480 nm   22.85   25.35 
 500 nm   22.65   24.80 
 520 nm   22.40   24.50 
 540 nm   22.10   24.20 
 560 nm   21.80   24.00 
 580 nm   21.50   23.90 
 600 nm   21.40   23.85 
 620 nm   21.10   23.60 
 640 nm   20.85   22.40 
 660 nm   20.55   22.90 
 680 nm   20.00   22.30 
 700 nm   20.20   22.50 
Calculated Relative Intensity Colors of Aramayoite in Air
Relative
Intensity		    0%   30%   60%   90% 100% 120% 150% 180% 210% 240%
R1                    
R2                    
Calculated Relative Intensity Colors of Aramayoite in Oil
Relative
Intensity		    0%   50% 100% 150% 200% 250% 300% 350% 400% 420%
R1                    
R2                    
 

Calculated Properties of Aramayoite

Help on Electron Density: Electron Density:

relectron=4.93 gm/cc
note: rAramayoite =5.61 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.00156
Boson Index = 0.99844
Help on Photoelectric: Photoelectric:

PEAramayoite = 409.38 barns/electron
U=PEAramayoite x relectron=2,016.35 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Aramayoite is Not Radioactive
 

Aramayoite Classification
Help on Dana Class: Dana Class: 3.7.4.1 (3)Sulfides - Sulfosalts
  (3.7)where z/y = 2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (3.7.4)Dana Group
 
3.7.4.1 Aramayoite Ag3Sb2(Sb,Bi)S6 P1 1
 
3.7.4.2 Baumstarkite! Ag3(Sb,As)2SbS6 P1 1
Help on Strunz Class: Strunz Class: II/C.16-20 II - Sulfides and sulphosalts
  II/C - Sulfides with metal: sulfur, selenium and tellurium = 1:1
  II/C.16 - Miargyrite - Volynskite series
 
II/C.16-05 Cuboargyrite! AgSbS F m3m 4/m 3 2/m
 
II/C.16-10 Miargyrite AgSbS2 C 2/c 2/m
 
II/C.16-15 Baumstarkite! Ag3(Sb,As)2SbS6 P1 1
 
II/C.16-20 Aramayoite Ag3Sb2(Sb,Bi)S6 P1 1
 
II/C.16-30 Matildite AgBiS2 P 3m1 3 2/m
 
II/C.16-35 Schapbachite! AgBiS2 F m3m 4/m 3 2/m
 
II/C.16-40 Bohdanowiczite AgBiSe2 P 3m1 3 2/m
 
II/C.16-50 Volynskite AgBiTe2 P 3m1 3 2/m
 

Other Aramayoite Information
Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(AmMin, Vol 87, p 753) OPTIC PROP.(AmMin, Vol 87, p 735)
Help on See Also: See Also: Links to other databases for Aramayoite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Aramayoite

Ag3Sb2(Sb,Bi)S6
Dana No: 3.7.4.1 Strunz No: II/C.16-20
Locality:

 

Notes:

 
 
   
 
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