Mineralogy Database

Jankovicite Mineral Data

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General Jankovicite Information

Help on Chemical  Formula: Chemical Formula: Tl5Sb9(As,Sb)4S22
Help on Composition: Composition: Molecular Weight = 3,169.63 gm
   Thallium  32.24 %  Tl
   Antimony  38.41 %  Sb
   Arsenic    7.09 %  As
   Sulfur    22.26 %  S
            100.00 % 
Help on Empirical Formula: Empirical Formula: Tl5Sb9As3SbS22
Help on Environment: Environment: In the Sb-poor, As-rich, and Tl-rich zone of the Crven Dol mine.
Help on IMA Status: IMA Status: Approved IMA 1995
Help on Locality: Locality: Crven Dol mine, Allchar, Macedonia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For Prof. S. Jankovic (1925- ) in recognition of his work on the mineralogy and geology of Allchar.
Help on Name Pronunciation: Name Pronunciation: Jankovicite + Pronunciation Say JANKOVICITE
Help on Synonym: Synonym: ICSD 79846
  PDF 46-1363

Jankovicite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.849:1:2.0195
Help on Cell Dimensions: Cell Dimensions: a = 7.393, b = 8.707, c = 17.584, Z = 1; alpha = 103.133°, beta = 91.132°, gamma = 109.833° V = 1,036.71 Den(Calc)= 5.08
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1

Physical Properties of Jankovicite

Help on Cleavage: Cleavage: {001} Perfect, {010} Perfect, {100} Perfect
Help on Color: Color: Black.
Help on Density: Density: 5.08
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Metallic
Help on Streak: Streak: violet brown

Optical Properties of Jankovicite

Help on RL Anisotrophism: RL Anisotrophism: Distinct to strong, with gray-blue to green-blue effects.
Help on RL Bireflectance: RL Bireflectance: Low to medium.
Help on RL Color: RL Color: White to bluish white.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Jankovicite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 470 nm   34.00   36.70 
 546 nm   32.00   34.90 
 589 nm   30.50   33.00 
 650 nm   28.10   29.70 
Calculated Relative Intensity Colors of Jankovicite in Air
   0%   40%   80% 100% 120% 160% 200% 240% 280% 300%

Calculated Properties of Jankovicite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.40 gm/cc
note: Specific Gravity of Jankovicite =5.10 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0016692436
Boson Index = 0.9983307564
Help on Photoelectric: Photoelectric: PEJankovicite = 687.87 barns/electron
U=PEJankovicite x rElectron Density=3,023.78 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Jankovicite is Not Radioactive

Jankovicite Classification

Help on  Dana Class: Dana Class: (03)Sulfides - Sulfosalts
  (03.08)where 1 < z/y <2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.08.13)Dana Group Rebulite Tl5Sb5As8S22 P 21/c 2/m Jankovicite Tl5Sb9(As,Sb)4S22 P1 1
Help on  Strunz Class: Strunz Class: 02.HD.20 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.H - Sulfosalts of SnS Archetype
  02.HD -With Tl
02.HD.20 Jankovicite Tl5Sb9(As,Sb)4S22 P1 1

Other Jankovicite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.81,1996) OPTIC PROP.(MinRec, v 27, p 302)
Help on See Also: See Also: Links to other databases for Jankovicite :
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

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Dana No: Strunz No: 02.HD.20





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