Enargite Mineral Data

Enargite Mineral Data
Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images Share
      News Help About


General Enargite Information

Help on Chemical Formula: Chemical Formula: Cu3AsS4
Help on Composition: Composition: Molecular Weight = 393.82 gm
   Copper   48.41 %  Cu
   Arsenic  19.02 %  As
   Sulfur   32.57 %  S
           ______ 
           100.00 % 
Help on Empirical Formula: Empirical Formula: Cu3AsS4
Help on Environment: Environment: Moderate-temperature hydrothermal vein deposits. Late stage mineral in low temperature deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1850
Help on Locality: Locality: Butte, Montana, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek enarges - "obvious."
Help on Name Pronunciation: Name Pronunciation: Enargite Say ENARGITE
Help on Synonym: Synonym: ICSD 75556
  PDF 35-580
  Stannoenargite - Sn-bearing enargite
 

Enargite Image

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

Enargite

Comments: Lustrous, metallic gray columnar crystals of enargite with minor quartz.
Location: Quiruvilca, La Libertad Dept., Peru. Scale: 4.2x2x2.3 cm.
© Isaias Casanova / IC Minerals
Click Here for Larger Enargite Image in a New Browser Window Images:
Click Here for Larger Enargite Image

Enargite   Famatinite

Comments: Violet metallic crystalline famatinite with black massive enargite.
Location: Cerro de Pasco, Pasco, Peru. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Enargite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.8638:1:0.8288
Help on Cell Dimensions: Cell Dimensions: a = 6.41, b = 7.42, c = 6.15, Z = 2; V = 292.51 Den(Calc)= 4.47
Help on Crystal System: Crystal System: Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: Pnm21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.22(1), 1.859(0.9), 2.87(0.8),
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 1 0) ( 1 0 0) ( 0 0 1)

Warning: this large pop-up is very compute intensive and may not work well with some computers.
Click Here for Large Enargite Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
 Help on Above


Adiwidjaja G , Lohn J , Acta Crystallographica, Section B , 26 (1970) p.1878-1879, Strukturverfeinerung von enargit, Cu3AsS4, Locality: Butte, Montana, USA

View Additional jPOWD Structure files for Enargite
[1]
 

Physical Properties of Enargite

Help on Cleavage: Cleavage: {110} Perfect, {100} Distinct, {010} Distinct
Help on Color: Color: Steel gray, Blackish gray, Violet black.
Help on Density: Density: 4.4 - 4.5, Average = 4.45
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 3 - Calcite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Metallic
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: black
 

Optical Properties of Enargite

Help on RL Anisotrophism: RL Anisotrophism: Very strong, dark violet-red or olive green tones.
Help on RL Color: RL Color: Gray to light pinkish brown with deep red internal reflections.
Help on RL Pleochroism: RL Pleochroism: Weak.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Enargite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   27.50   30.00 
   
 420 nm   27.00   29.30 
 440 nm   26.50   28.60 
 460 nm   26.00   28.00 
 480 nm   25.60   27.40 
 500 nm   25.30   27.00 
 520 nm   25.10   26.60 
 540 nm   25.00   26.40 
 560 nm   25.10   26.40 
 580 nm   25.30   26.60 
 600 nm   25.70   27.00 
 620 nm   26.20   27.60 
 640 nm   26.80   28.30 
 660 nm   27.60   28.90 
 680 nm   28.20   29.60 
 700 nm   28.80   30.30 
Calculated Relative Intensity Colors of Enargite in Air
Relative
Intensity		    0%   40%   80% 100% 120% 160% 200% 240% 280% 320% 350%
R1                      
R2                      
 

Calculated Properties of Enargite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.18 gm/cc
note: Specific Gravity of Enargite =4.47 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0024426672
Boson Index = 0.9975573328
Help on Photoelectric: Photoelectric: PEEnargite = 36.75 barns/electron
U=PEEnargite x rElectron Density= 153.51 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Enargite is Not Radioactive
 

Enargite Classification
Help on Dana Class: Dana Class: 03.02.01.01 (03)Sulfides - Sulfosalts
  (03.02)where z/y = 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.02.01)Dana Group
 
03.02.01.01 Enargite Cu3AsS4 Pnm21 mm2
Help on Strunz Class: Strunz Class: 02.KA.05 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.K - Sulfarsenates, Sulfantimonates
  02.KA -Sulfarsenates with (As,Sb)S4 tetrahedra
 
02.KA.05 Enargite Cu3AsS4 Pnm21 mm2
 
02.KA.05 Petrukite (Cu,Fe,Zn)2(Sn,In)S4 P mn21 mm2
 
02.KA.05 Stibioenargite* Cu3(Sb,As)S4 Unk Ortho
 

Other Enargite Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Enargite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - HyperPhysics
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - Philatelic Mineralogy
16 - QUT Mineral Atlas
17 - Ruff.Info
18 - WWW-MINCRYST
19 - theimage

Search for Enargite using:

Google
 
Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Enargite :

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

Ask about Enargite 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 Espaņol

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

Enargite

Cu3AsS4
Dana No: 03.02.01.01 Strunz No: 02.KA.05
Locality:

 

Notes: