Angelaite Mineral Data

(Translated by https://www.hiragana.jp/)
Angelaite Mineral Data

General Angelaite Information

Chemical Formula:

Cu2AgPbBiS4

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 %

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

Angelaite Image

Images:

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 AsociaciÃ³n GeolÃ³gica Argentina

Angelaite Crystallography

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 - PrismaticH-M Symbol (2/m) Space Group: P 2₁/n

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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

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

Optical Properties of Angelaite

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	∑ 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

Electron Density:

Bulk Density (Electron Density)=5.91 gm/cc
note: Specific Gravity of Angelaite =6.89 gm/cc.

Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Photoelectric:

PE_Angelaite=1,025.41 barns/electron
U=PE_Angelaite x rElectron Density=6,055.22 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Angelaite is Not Radioactive

Angelaite Classification

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

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

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:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Angelaite :

A Bijoux Google Search for Angelaite
Adam's Minerals Google Search for Angelaite
Cape Minerals Google Search for Angelaite
Dakota Matrix Minerals Google Search for Angelaite
Excalibur Mineral Corp. Google Search for Angelaite
Exceptional Minerals Google Search for Angelaite
John Betts Fine Minerals Search for Angelaite
McDougall Minerals Google Search for Angelaite
Mineral News Website Link
Rock and Mineral Shows Google Search for Angelaite
Weinrich Minerals, Inc. Google Search for Angelaite

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: