Mineralogy Database

Velikite Mineral Data

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General Velikite Information

Help on Chemical  Formula: Chemical Formula: Cu2HgSnS4
Help on Composition: Composition: Molecular Weight = 574.66 gm
   Copper   22.12 %  Cu
   Tin      20.66 %  Sn
   Mercury  34.91 %  Hg
   Sulfur   22.32 %  S
           ______ 
           100.00 % 
Help on Empirical Formula: Empirical Formula: Cu2HgSnS4
Help on Environment: Environment: In veins cutting carboniferous black schists and limestones in a mercury deposit. The mercury dominant analog of cernyite and stannite.
Help on IMA Status: IMA Status: Approved IMA 1977
Help on Locality: Locality: Khaidarkan Hg deposit, about 60 km south of Fergana, Kirgizia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For A. C. Velikyi (1913-1970), a well known investigator of the ore deposits of Central Asia.
Help on Name Pronunciation: Name Pronunciation: Velikite Say VELIKITE
Help on Synonym: Synonym: ICSD 27746
  IMA1996-052
  PDF 45-1420
 

Velikite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.96417
Help on Cell Dimensions: Cell Dimensions: a = 5.555, c = 10.911, Z = 2; V = 336.69 Den(Calc)= 5.67
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): 3.17(1), 1.941(0.8), 1.671(0.4),
 

Physical Properties of Velikite

Help on Cleavage: Cleavage: None
Help on Color: Color: Gray, Greenish gray, Light gray.
Help on Density: Density: 5.45
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Metallic
Help on Streak: Streak: gray
 

Optical Properties of Velikite

Help on RL Anisotrophism: RL Anisotrophism: Moderate.
Help on RL Bireflectance: RL Bireflectance: Insignificant.
Help on RL Color: RL Color: Greenish gray to light gray with greenish-brownish tint.
Help on RL Pleochroism: RL Pleochroism: Weak.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Velikite in Air
λ R  ∑ R(λ) 
 470 nm   26.00   
 546 nm   26.30 
 589 nm   25.60 
 650 nm   24.80 
Calculated Relative Intensity Colors of Velikite in Air
Relative
Intensity
   0%   40%   80% 100% 120% 160% 200% 240% 280% 320% 350%
R                      
 

Calculated Properties of Velikite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.97 gm/cc
note: Specific Gravity of Velikite =5.67 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.14
Boson Index = 0.86
Help on Photoelectric: Photoelectric: PEVelikite = 640.11 barns/electron
U=PEVelikite x rElectron Density=3,183.16 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Velikite is Not Radioactive
 

Velikite Classification

Help on  Dana Class: Dana Class: 02.09.02.08 (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 Velikite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(MinRec, v 29, p 478)
Help on See Also: See Also: Links to other databases for Velikite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - WWW-MINCRYST

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

Velikite

Cu2HgSnS4
Dana No: 02.09.02.08 Strunz No: 02.CB.15a
Locality:

 

Notes:

 

 
   
 


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