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Angelaite Mineral Data
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General Angelaite Information
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 Chemical Formula: |
Cu2AgPbBiS4 |
| Composition: |
Molecular Weight = 779.40 gm |
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Copper 16.31 % Cu |
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Silver 13.84 % Ag |
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Bismuth 26.81 % Bi |
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Lead 26.58 % Pb |
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Sulfur 16.46 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Cu2AgPbBiS4 |
| Environment: |
Mineralization in calcalcaline andesitic to dacitic rocks of Late Jurassic age. Higher homologue of miharaite. |
| IMA Status: |
Approved IMA 2003 (Dana # Added) |
| Locality: |
Angela mine, district of Los Manantiales, Gastre, Chubut, Argentine. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Synonym: |
IMA2003-064 |
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Angelaite Image |
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Images:
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Angelaite Miharaite
Comments: Image of a polished section of the ore (without analyzer): galena (ga) with numerous inclusions miharaÃte (wi) and angelaÃte (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 |
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Angelaite Crystallography
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| Axial Ratios: |
a:b:c =0.3167:1:1.1495 |
| Cell Dimensions: |
a = 4.0329, b = 12.734, c = 14.639, Z = 4; beta = 90.103° V = 751.78 Den(Calc)= 6.89 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/n |
| 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), |
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Physical Properties of Angelaite
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| Color: |
Gray. |
| Diaphaneity: |
Opaque |
| Habit: |
Anhedral Grains - Granular minerals without the expression of crystal shapes |
| Habit: |
Microscopic Crystals - Crystals visible only with microscopes. |
| Luster: |
Metallic |
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Optical Properties of Angelaite
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| RL Anisotrophism: |
Distinct. |
| RL Bireflectance: |
Moderate. |
| RL Color: |
Yellowish to brownish with no internal reflections. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Angelaite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 470 nm |
40.20 |
45.70 |
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| 546 nm |
39.30 |
44.50 |
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| 589 nm |
38.90 |
44.10 |
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| 650 nm |
38.60 |
44.10 |
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Calculated Relative Intensity Colors of Angelaite in Air
Relative
Intensity |
0% |
30% |
60% |
90% |
100% |
120% |
150% |
180% |
210% |
230% |
| R1 |
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| R2 |
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Calculated Properties of Angelaite
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| Electron Density: |
Bulk Density (Electron Density)=5.91 gm/cc
note: Specific Gravity of Angelaite =6.89 gm/cc.
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| Fermion Index: |
Fermion Index = 0.05
Boson Index = 0.95 |
| Photoelectric: |
PEAngelaite =1,025.41 barns/electron
U=PEAngelaite x rElectron Density=6,055.22 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Angelaite is Not Radioactive |
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Angelaite Classification
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| Dana Class: |
03.02.10.01 (03)Sulfides - Sulfosalts |
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(03.02)where z/y = 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(03.02.10)Dana Group |
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03.02.10.01 Angelaite! Cu2AgPbBiS4 P 21/n 2/m |
| Strunz Class: |
02.JB.45 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.J - Sulfosalts of PbS Archetype |
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02.JB -Galena derivatives, with Pb |
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02.JB.45 Galenobismutite PbBi2S4 Pnam 2/m 2/m 2/m |
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02.JB.45 Weibullite Pb6Bi8(S,Se)18 P nma 2/m 2/m 2/m |
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02.JB.45 Angelaite! Cu2AgPbBiS4 P 21/n 2/m |
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Other Angelaite Information
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| References: |
NAME( AsocGeolArgent, v59, no 4) PHYS. PROP.(AsocGeolArgent, v59, no 4) OPTIC PROP.(AsocGeolArgent, v59, no 4) |
| 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
Search for Angelaite using:
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[Teoma]
[WebCrawler]
[Wikipedia]
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Print or Cut-and-Paste your Angelaite Specimen Label here :
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Angelaite
Cu2AgPbBiS4
Dana No: 03.02.10.01 Strunz No: 02.JB.45
Locality:
Notes:
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