Angelaite Mineral Data

Angelaite Mineral Data
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General Angelaite Information

Help on Chemical Formula: Chemical Formula: Cu2AgPbBiS4
Help on Composition: Composition: Molecular Weight = 779.40 gm
   Copper   16.31 %  Cu
   Silver   13.84 %  Ag
   Bismuth  26.81 %  Bi
   Lead     26.58 %  Pb
   Sulfur   16.46 %  S
           ______ 
           100.00 % 
Help on Empirical Formula: Empirical Formula: Cu2AgPbBiS4
Help on Environment: Environment: Mineralization in calcalcaline andesitic to dacitic rocks of Late Jurassic age. Higher homologue of miharaite.
Help on IMA Status: IMA Status: Approved IMA 2003 (Dana # Added)
Help on Locality: Locality: Angela mine, district of Los Manantiales, Gastre, Chubut, Argentine. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Synonym: Synonym: IMA2003-064
 

Angelaite Image

Click Here for Larger Angelaite Image in a New Browser Window Images:
Click Here for Larger Angelaite Image

Angelaite   Miharaite

Comments: Image of a polished section of the ore (without analyzer): galena (ga) with numerous inclusions miharaíte (wi) and angelaíte (an). Pyrite (pi), chalcopyrite (cp). (AsocGeolArgent, v59, no 4).
Location: Angela mine, IS-type mineralization in the district springs, Chubut, Argentina. Scale: See Image.
© Revista de la Asociación Geológica Argentina

Angelaite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.3167:1:1.1495
Help on Cell Dimensions: Cell Dimensions: a = 4.0329, b = 12.734, c = 14.639, Z = 4; beta = 90.103° V = 751.78 Den(Calc)= 6.89
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.67(1), 3.017(0.72), 3.022(0.72),3.111(0.69), 3.66(0.64), 3.317(0.62), 3.319(0.62), 3.41(0.6),
 

Physical Properties of Angelaite

Help on Color: Color: Gray.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Luster: Luster: Metallic
 

Optical Properties of Angelaite

Help on RL Anisotrophism: RL Anisotrophism: Distinct.
Help on RL Bireflectance: RL Bireflectance: Moderate.
Help on RL Color: RL Color: Yellowish to brownish with no internal reflections.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Angelaite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 470 nm   40.20   45.70 
   
 546 nm   39.30   44.50 
 589 nm   38.90   44.10 
 650 nm   38.60   44.10 
Calculated Relative Intensity Colors of Angelaite in Air
Relative
Intensity		    0%   30%   60%   90% 100% 120% 150% 180% 210% 230%
R1                    
R2                    
 

Calculated Properties of Angelaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.91 gm/cc
note: Specific Gravity of Angelaite =6.89 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEAngelaite =1,025.41 barns/electron
U=PEAngelaite x rElectron Density=6,055.22 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Angelaite is Not Radioactive
 

Angelaite Classification
Help on Dana Class: Dana Class: 03.02.10.01 (03)Sulfides - Sulfosalts
  (03.02)where z/y = 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.02.10)Dana Group
 
03.02.10.01 Angelaite! Cu2AgPbBiS4 P 21/n 2/m
Help on Strunz Class: Strunz Class: 02.JB.45 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.J - Sulfosalts of PbS Archetype
  02.JB -Galena derivatives, with Pb
 
02.JB.45 Galenobismutite PbBi2S4 Pnam 2/m 2/m 2/m
 
02.JB.45 Weibullite Pb6Bi8(S,Se)18 P nma 2/m 2/m 2/m
 
02.JB.45 Angelaite! Cu2AgPbBiS4 P 21/n 2/m
 

Other Angelaite Information
Help on References: References: NAME( AsocGeolArgent, v59, no 4) PHYS. PROP.(AsocGeolArgent, v59, no 4) OPTIC PROP.(AsocGeolArgent, v59, no 4)
Help on See Also: See Also: Links to other databases for Angelaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Ask about Angelaite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Angelaite Specimen Label here :

Angelaite

Cu2AgPbBiS4
Dana No: 03.02.10.01 Strunz No: 02.JB.45
Locality:

 

Notes: