Laforetite Mineral Data

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


Dan Weinrich Auctions
[Mineral Auctions] [Register] [Current Auctions] [Log In] [www.danweinrich.com]
Weinrich Minerals Auctions, Inc
Specializing In Live Weekly Auctions Of Top Quality Mineral Specimens
The Place To Find Great Specimens At Great Prices!


General Laforetite Information

Help on Chemical Formula: Chemical Formula: AgInS2
Help on Composition: Composition: Molecular Weight = 286.82 gm
   Indium  40.03 %  In
   Silver  37.61 %  Ag
   Sulfur  22.36 %  S
          ______ 
          100.00 % 
Help on Empirical Formula: Empirical Formula: AgInS2
Help on Environment: Environment: Breccia vein sample from the mine dumps. Microscopic inclusions in galena.
Help on IMA Status: IMA Status: Approved IMA 1995 (Dana # Added)
Help on Locality: Locality: The disused Montgros mine (Pinols claim), near the hamlet La Boriette, about 10 km SW of Langeac, Haute-Loire, France. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Claude P. Laforet (1936-) a metallographer at the Bureau de Recherches Geologiques et Minieres, who first observed the mineral from the Montgros mine.
Help on Synonym: Synonym: IMA1995-006
 

Search for Laforetite 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.
  

Laforetite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:1.90646
Help on Cell Dimensions: Cell Dimensions: a = 5.88, c = 11.21, Z = 4; V = 387.58 Den(Calc)= 4.92
Help on Crystal System: Crystal System: Tetragonal - ScalenohedralH-M Symbol (4 2m) Space Group: I 42d
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.351(1), 2.942(0.8), 1.768(0.8),2.03(0.75), 2.082(0.75), 1.189(0.4), 1.707(0.35),
 

Physical Properties of Laforetite

Help on Cleavage: Cleavage: None
Help on Color: Color: Brown.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Inclusions - Generally found as inclusions in other minerals.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Metallic
Help on Streak: Streak: chocolate brown
 

Optical Properties of Laforetite

Help on RL Anisotrophism: RL Anisotrophism: Strong, brick-red with an orange tint to bluish-gray purplish.
Help on RL Color: RL Color: Brownish gray in oil with abundant strawberry red internal reflections.
Help on RL Pleochroism: RL Pleochroism: Weak, from brown to brown-gray.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Laforetite in Air
λ R  ∑ R(λ) 
 480 nm   26.00   
 540 nm   24.60 
 580 nm   24.20 
 640 nm   24.60 
Calculated Relative Intensity Colors of Laforetite in Air
Relative
Intensity		    0%   40%   80% 100% 120% 160% 200% 240% 280% 320% 360%
R                      
 

Calculated Properties of Laforetite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.39 gm/cc
note: Specific Gravity of Laforetite =4.92 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0016769739
Boson Index = 0.9983230261
Help on Photoelectric: Photoelectric: PELaforetite = 213.69 barns/electron
U=PELaforetite x rElectron Density= 938.38 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Laforetite is Not Radioactive
 

Laforetite Classification
Help on Dana Class: Dana Class: 02.09.01.06 (02)Sulfides - Including Selenides and Tellurides
  (02.09)where Am Bn Xp, with (m+n):p=1:1
  (02.09.01)Chalcopyrite Group (Tetragonal: I-42d)
 
02.09.01.01 Chalcopyrite CuFeS2 I 42d 4 2m
 
02.09.01.02 Eskebornite CuFeSe2 I 42d 4 2m
 
02.09.01.03 Gallite CuGaS2 I 42d 4 2m
 
02.09.01.04 Roquesite CuInS2 I 42d 4 2m
 
02.09.01.05 Lenaite AgFeS2 P 42mc 4mm
 
02.09.01.06 Laforetite! AgInS2 I 42d 4 2m
Help on Strunz Class: Strunz Class: 02.CB.10a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.C - Metal Sulfides, M:S = 1:1 (and similar)
  02.CB -With Zn, Fe, Cu, Ag, Au, etc
 
02.CB.10a Chalcopyrite CuFeS2 I 42d 4 2m
 
02.CB.10a Eskebornite CuFeSe2 I 42d 4 2m
 
02.CB.10a Gallite CuGaS2 I 42d 4 2m
 
02.CB.10a Laforetite! AgInS2 I 42d 4 2m
 
02.CB.10a Lenaite AgFeS2 P 42mc 4mm
 
02.CB.10a Roquesite CuInS2 I 42d 4 2m
 

Other Laforetite Information
Help on References: References: NAME( MinRec, Vol 31, No 4) PHYS. PROP.(MinRec, Vol 31, No 4) OPTIC PROP.(AmMin, v 85, p 875)
Help on See Also: See Also: Links to other databases for Laforetite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

Search for Laforetite using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [bing] [GeoScienceWorld] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Laforetite :

B & L Fine Minerals

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

John Betts Fine Minerals

Lapis Mineral Journal

Mineral News

UV Tools

Wrights Rock Shop

Translate Laforetite Mineral Data :

Ask about Laforetite 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 Laforetite Specimen Label here :

Laforetite

AgInS2
Dana No: 02.09.01.06 Strunz No: 02.CB.10a
Locality:

 

Notes: