Aramayoite Mineral Data (original) (raw)
General Aramayoite Information
Chemical Formula:
Ag3Sb2(Sb,Bi)S6
Composition:
Molecular Weight = 924.87 gm
Silver 34.99 % Ag
Bismuth 11.30 % Bi
Antimony 32.91 % Sb
Sulfur 20.80 % S
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100.00 %
Empirical Formula:
Ag3Sb2.5Bi0.5S6
Environment:
In vein-controlled hydrothermal tin and silver ores.
IMA Status:
Valid Species (Pre-IMA) 1926
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.
Name Origin:
Named for Felix Avelino Aramayo, former Managing Director of the Compagnie Aramayo de Mines en Bolivie.
Name Pronunciation:
Aramayoite + Pronunciation 
Synonym:
ICSD 8165
PDF 4-696
Aramayoite Image
Images:
 |
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 |
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Aramayoite Crystallography
Axial Ratios:
a:b:c =0.9449:1:1.074
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
Crystal System:
Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1
X Ray Diffraction:
By Intensity(I/Io): 2.82(1), 3.22(0.4), 1.94(0.3),
Forms:
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| | Forms:( 1 2 2) ( 0 1 0) ( 3 2 0) ( 2 0 1) ( 1 1 0) ( 0 0 1) Warning: this large pop-up is very compute intensive and may not work well with some computers. | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
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
Cleavage:
{???} Perfect, {???} Indistinct, {???} Indistinct
Color:
Iron black, Deep blood red.
Density:
5.6
Diaphaneity:
Opaque
Fracture:
Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Habit:
Pseudo Tetragonal - Crystals show a tetragonal shape.
Hardness:
2.5 - Finger Nail
Luster:
Metallic
Streak:
black
Optical Properties of Aramayoite
Reflectivity
Standardized Intensity (100%) Reflection Spectra of Aramayoite in Air
| λ | R1 | R 2 |  |
∑ R1(λ) | ∑ R2(λ) |
|---|---|---|---|---|---|
| 400 nm | 38.90 | 43.40 |  |
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| 420 nm | 38.85 | 42.50 |  |
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| 440 nm | 38.50 | 41.90 |  |
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| 460 nm | 38.40 | 41.60 |  |
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| 480 nm | 38.20 | 41.10 |  |
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| 500 nm | 38.05 | 40.90 |  |
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| 520 nm | 37.80 | 40.50 |  |
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| 540 nm | 37.50 | 40.25 |  |
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| 560 nm | 37.30 | 40.05 |  |
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| 580 nm | 37.10 | 40.10 |  |
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| 600 nm | 37.00 | 40.10 |  |
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| 620 nm | 36.70 | 39.90 |  |
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| 640 nm | 36.60 | 39.50 |  |
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| 660 nm | 36.20 | 39.10 |  |
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| 680 nm | 36.10 | 39.00 |  |
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| 700 nm | 36.30 | 39.80 |  |
Standardized Intensity (100%) Reflection Spectra of Aramayoite in Oil
| λ | R1 | R 2 | |
∑ R1(λ) | ∑ R2(λ) |
|---|---|---|---|---|---|
| 400 nm | 23.60 | 25.92 | |
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| 420 nm | 23.70 | 26.20 | |
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| 440 nm | 23.40 | 26.10 | |
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| 460 nm | 23.00 | 25.50 | |
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| 480 nm | 22.85 | 25.35 | |
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| 500 nm | 22.65 | 24.80 | |
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| 520 nm | 22.40 | 24.50 | |
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| 540 nm | 22.10 | 24.20 | |
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| 560 nm | 21.80 | 24.00 | |
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| 580 nm | 21.50 | 23.90 | |
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| 600 nm | 21.40 | 23.85 | |
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| 620 nm | 21.10 | 23.60 | |
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| 640 nm | 20.85 | 22.40 | |
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| 660 nm | 20.55 | 22.90 | |
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| 680 nm | 20.00 | 22.30 | |
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| 700 nm | 20.20 | 22.50 | |
Calculated Relative Intensity Colors of Aramayoite in Air
| RelativeIntensity | 0% | 30% | 60% | 90% | 100% | 120% | 150% | 180% | 210% | 240% |
|---|---|---|---|---|---|---|---|---|---|---|
| R1 | ||||||||||
| R2 |
Calculated Relative Intensity Colors of Aramayoite in Oil
| RelativeIntensity | 0% | 50% | 100% | 150% | 200% | 250% | 300% | 350% | 400% | 420% |
|---|---|---|---|---|---|---|---|---|---|---|
| R1 | ||||||||||
| R2 |
Calculated Properties of Aramayoite
Electron Density:
Bulk Density (Electron Density)=4.93 gm/cc
note: Specific Gravity of Aramayoite =5.62 gm/cc.
Fermion Index:
Fermion Index = 0.0015603069
Boson Index = 0.9984396931
Photoelectric:
PEAramayoite = 409.38 barns/electron
U=PEAramayoite x rElectron Density=2,019.95 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Aramayoite is Not Radioactive
Aramayoite Classification
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
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
References:
NAME( AntBidBlaNic1) PHYS. PROP.(AmMin, Vol 87, p 753) OPTIC PROP.(AmMin, Vol 87, p 735)
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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Ask about Aramayoite here :
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Print or Cut-and-Paste your Aramayoite Specimen Label here :
Aramayoite
Ag3Sb2(Sb,Bi)S6
Dana No: 03.07.04.01 Strunz No: 02.HA.25
Locality:
Notes: