Mineralogy Database

Aramayoite Mineral Data

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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 Name Pronunciation: Name Pronunciation: Aramayoite + Pronunciation Say ARAMAYOITE
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 - Pinacoidal H-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:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 1 2 2) ( 0 1 0) ( 3 2 0) ( 2 0 1) ( 1 1 0) ( 0 0 1)

Warning: this java applet does not work in some browsers because of security restrictions.

 

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 Diaphaneity: Diaphaneity: 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: Bulk Density (Electron Density)=4.93 gm/cc
note: Specific Gravity of Aramayoite =5.62 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0015603069
Boson Index = 0.9984396931
Help on Photoelectric: Photoelectric: PEAramayoite = 409.38 barns/electron
U=PEAramayoite x rElectron Density=2,019.95 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: 03.07.04.01 (03)Sulfides - Sulfosalts
  (03.07)where z/y = 2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.07.04)Dana Group
 
03.07.04.01 Aramayoite Ag3Sb2(Sb,Bi)S6 P1 1
 
03.07.04.02 Baumstarkite! Ag3(Sb,As)2SbS6 P1 1
Help on  Strunz Class: Strunz Class: 02.HA.25 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.H - Sulfosalts of SnS Archetype
  02.HA -With Cu, Ag, Fe (without Pb)
 
02.HA.25 Aramayoite Ag3Sb2(Sb,Bi)S6 P1 1
 
02.HA.25 Baumstarkite! Ag3(Sb,As)2SbS6 P1 1
 

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 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Aramayoite

Ag3Sb2(Sb,Bi)S6
Dana No: 03.07.04.01 Strunz No: 02.HA.25
Locality:

 

Notes:

 

 
   
 


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