Mineralogy Database

Hocartite Mineral Data

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General Hocartite Information

Help on Chemical  Formula: Chemical Formula: Ag2FeSnS4
Help on Composition: Composition: Molecular Weight = 518.56 gm
   Iron    10.77 %  Fe
   Silver  41.60 %  Ag
   Tin     22.89 %  Sn
   Sulfur  24.73 %  S
          ______ 
          100.00 % 
Help on Empirical Formula: Empirical Formula: Ag2Fe2+SnS4
Help on Environment: Environment: In tin veins.
Help on IMA Status: IMA Status: Approved IMA 1968
Help on Locality: Locality: Chocaya-Animas Mine, Atocha-Quechisla District, Bolivia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For Raymind Hocart, Professor of Mineralogy, University of Paris, France.
Help on Name Pronunciation: Name Pronunciation: Hocartite + Pronunciation Say HOCARTITE
Help on Synonym: Synonym: ICSD 42534
  PDF 21-1337
 

Hocartite Image

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

Comments: B&W image of hocartite (hc) and rhodostannite (r) in sphalerite (s) and pyrite (p). (Mineralogical Journal, v15:222).
Location: Toyoha mine, SW Sapporo City, Hokkaido, Japan. Scale: Scale Bar 50µm.
© Mineralogical Journal

Hocartite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.9094
Help on Cell Dimensions: Cell Dimensions: a = 5.74, c = 10.96, Z = 2; V = 361.11 Den(Calc)= 4.77
Help on Crystal System: Crystal System: Tetragonal - Scalenohedral H-M Symbol (4 2m) Space Group: I 42m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.26(1), 1.98(0.8), 1.72(0.7),
 

Physical Properties of Hocartite

Help on Color: Color: Brownish gray.
Help on Density: Density: 4.77
Help on Diaphaneity: Diaphaneity: Opaque
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Metallic
 

Optical Properties of Hocartite

Help on RL Anisotrophism: RL Anisotrophism: Distinct, orange to greenish.
Help on RL Color: RL Color: Brownish gray.
Help on RL Pleochroism: RL Pleochroism: Weak, gray-brown to violet gray.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Hocartite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   27.00   27.70 
   
 420 nm   26.50   27.20 
 440 nm   26.00   26.70 
 460 nm   25.50   26.30 
 480 nm   25.20   26.00 
 500 nm   24.80   25.70 
 520 nm   24.70   25.50 
 540 nm   24.50   25.40 
 560 nm   24.40   25.30 
 580 nm   24.50   25.40 
 600 nm   24.60   25.50 
 620 nm   24.80   25.60 
 640 nm   25.20   25.20 
 660 nm   25.40   24.80 
 680 nm   24.80   24.40 
 700 nm   23.70   24.50 
Calculated Relative Intensity Colors of Hocartite in Air
Relative
Intensity
   0%   40%   80% 100% 120% 160% 200% 240% 280% 320% 360%
R1                      
R2                      
 

Calculated Properties of Hocartite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.30 gm/cc
note: Specific Gravity of Hocartite =4.77 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEHocartite = 179.80 barns/electron
U=PEHocartite x rElectron Density= 774.03 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hocartite is Not Radioactive
 

Hocartite Classification

Help on  Dana Class: Dana Class: 02.09.02.06 (02)Sulfides - Including Selenides and Tellurides
  (02.09)where Am Bn Xp, with (m+n):p=1:1
  (02.09.02)Stannite Group (Tetragonal: I-42m) A2BCS type
 
02.09.02.01 Stannite Cu2FeSnS4 I 42m 4 2m
 
02.09.02.02 Cernyite Cu2CdSnS4 I 42m 4 2m
 
02.09.02.03 Briartite Cu2(Zn,Fe)GeS4 I 42m 4 2m
 
02.09.02.04 Kuramite Cu3SnS4 I 42m 4 2m
 
02.09.02.05 Sakuraiite (Cu,Zn,Fe,In,Sn)4S4 P 432, P 43m, or P m3m Cubic
 
02.09.02.06 Hocartite Ag2FeSnS4 I 42m 4 2m
 
02.09.02.07 Pirquitasite Ag2ZnSnS4 I 42m 4 2m
 
02.09.02.08 Velikite Cu2HgSnS4 I 42m 4 2m
 
02.09.02.09 Kesterite Cu2(Zn,Fe)SnS4 I 4 4
 
02.09.02.10 Ferrokesterite Cu2(Fe,Zn)SnS4 I 42m 4 2m
 
02.09.02.11 Barquillite! Cu2CdGeS4 I 42m 4 2m
Help on  Strunz Class: Strunz Class: 02.CB.15a 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.15a Cernyite Cu2CdSnS4 I 42m 4 2m
 
02.CB.15a Ferrokesterite Cu2(Fe,Zn)SnS4 I 42m 4 2m
 
02.CB.15a Kesterite Cu2(Zn,Fe)SnS4 I 4 4
 
02.CB.15a Hocartite Ag2FeSnS4 I 42m 4 2m
 
02.CB.15a Idaite Cu5FeS6 P 63/mmc 6/m 2/m 2/m
 
02.CB.15a Kuramite Cu3SnS4 I 42m 4 2m
 
02.CB.15a Pirquitasite Ag2ZnSnS4 I 42m 4 2m
 
02.CB.15a Stannite Cu2FeSnS4 I 42m 4 2m
 
02.CB.15a Velikite Cu2HgSnS4 I 42m 4 2m
 

Other Hocartite 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 Hocartite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Hocartite

Ag2FeSnS4
Dana No: 02.09.02.06 Strunz No: 02.CB.15a
Locality:

 

Notes:

 

 
   
 


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