Dervillite Mineral Data

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



[Newest Minerals] [Mineral Auctions] [Mineral Gallery]
The Mineral Gallery's Exceptional Specimens and Mineral Hall of Fame
Visa, PayPal, and Mastercard are Welcomed


General Dervillite Information

Help on Chemical Formula: Chemical Formula: Ag2AsS2
Help on Composition: Composition: Molecular Weight = 354.79 gm
   Silver   60.81 %  Ag
   Arsenic  21.12 %  As
   Sulfur   18.08 %  S
           ______ 
           100.00 % 
Help on Empirical Formula: Empirical Formula: Ag2AsS2
Help on Environment: Environment: In a Co-Ni-Fe-As deposit.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1941
Help on Locality: Locality: Found on a museum specimen from the Gabe-Gottes mine, Sainte-Marie-aux-Mies, Haut-Rhin, France. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For Dr. Henri Derville of Strasbourg University, Strasbourg, France.
Help on Name Pronunciation: Name Pronunciation: Dervillite + Pronunciation Say DERVILLITE
 

Search for Dervillite Images

Click Here To Search Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.
  

Dervillite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.5283:1:0.7452
Help on Cell Dimensions: Cell Dimensions: a = 6.833, b = 12.932, c = 9.638, Z = 4; beta = 99.53° V = 839.90 Den(Calc)= 2.81
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.075(1), 3.019(0.8), 2.843(0.5),
 

Physical Properties of Dervillite

Help on Cleavage: Cleavage: {???} Good
Help on Color: Color: Brownish black.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Hardness: Hardness: 1-1.5 - Talc or a little harder
Help on Luster: Luster: Metallic
Help on Streak: Streak: black
 

Optical Properties of Dervillite

Help on RL Anisotrophism: RL Anisotrophism: Moderate.
Help on RL Color: RL Color: White.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Dervillite in Air
λ R  ∑ R(λ) 
 400 nm   29.70   
 420 nm   25.60 
 440 nm   24.90 
 460 nm   24.20 
 480 nm   23.70 
 500 nm   23.50 
 520 nm   23.10 
 540 nm   22.20 
 560 nm   22.20 
 580 nm   21.90 
 600 nm   21.50 
 620 nm   21.20 
 640 nm   20.90 
 660 nm   20.60 
 680 nm   20.40 
 700 nm   20.40 
Calculated Relative Intensity Colors of Dervillite in Air
Relative
Intensity		    0%   50% 100% 150% 200% 250% 300% 350% 400% 410%
R                    
 

Calculated Properties of Dervillite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.52 gm/cc
note: Specific Gravity of Dervillite =2.81 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0013557034
Boson Index = 0.9986442966
Help on Photoelectric: Photoelectric: PEDervillite = 170.89 barns/electron
U=PEDervillite x rElectron Density= 430.40 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Dervillite is Not Radioactive
 

Dervillite Classification
Help on Dana Class: Dana Class: 03.07.17.01 (03)Sulfides - Sulfosalts
  (03.07)where z/y = 2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.07.17)Dana Group
 
03.07.17.01 Dervillite Ag2AsS2 P 2/a 2/m
Help on Strunz Class: Strunz Class: 02.LA.10 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.L - Unclassified Sulfosalts
  02.LA -Without essential Pb
 
02.LA.10 Dervillite Ag2AsS2 P 2/a 2/m
 

Other Dervillite Information
Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Dervillite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info

Search for Dervillite using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Dervillite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

Heliodor

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Dervillite Mineral Data :

Ask about Dervillite 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 Dervillite Specimen Label here :

Dervillite

Ag2AsS2
Dana No: 03.07.17.01 Strunz No: 02.LA.10
Locality:

 

Notes: