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Jankovicite Mineral Data
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General Jankovicite Information
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 Chemical Formula: |
Tl5Sb9(As,Sb)4S22 |
| Composition: |
Molecular Weight = 3,169.63 gm |
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Thallium 32.24 % Tl |
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Antimony 38.41 % Sb |
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Arsenic 7.09 % As |
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Sulfur 22.26 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Tl5Sb9As3SbS22 |
| Environment: |
In the Sb-poor, As-rich, and Tl-rich zone of the Crven Dol mine. |
| IMA Status: |
Approved IMA 1995 |
| Locality: |
Crven Dol mine, Allchar, Macedonia. Link to MinDat.org Location Data. |
| Name Origin: |
For Prof. S. Jankovic (1925- ) in recognition of his work on the mineralogy and geology of Allchar. |
| Name Pronunciation: |
Jankovicite + Pronunciation  |
| Synonym: |
ICSD 79846 |
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IMA1993-050 |
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PDF 46-1363 |
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Jankovicite Crystallography
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| Axial Ratios: |
a:b:c =0.849:1:2.0195 |
| 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 |
| Crystal System: |
Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1 |
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Physical Properties of Jankovicite
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| Cleavage: |
{001} Perfect, {010} Perfect, {100} Perfect |
| Color: |
Black. |
| Density: |
5.08 |
| Diaphaneity: |
Opaque |
| Fracture: |
Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. |
| Habit: |
Tabular - Form dimensions are thin in one direction. |
| Hardness: |
2 - Gypsum |
| Luminescence: |
Non-fluorescent. |
| Luster: |
Metallic |
| Streak: |
violet brown |
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Optical Properties of Jankovicite
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| RL Anisotrophism: |
Distinct to strong, with gray-blue to green-blue effects. |
| RL Bireflectance: |
Low to medium. |
| RL Color: |
White to bluish white. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Jankovicite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 470 nm |
34.00 |
36.70 |
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| 546 nm |
32.00 |
34.90 |
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| 589 nm |
30.50 |
33.00 |
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| 650 nm |
28.10 |
29.70 |
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Calculated Relative Intensity Colors of Jankovicite in Air
Relative
Intensity |
0% |
40% |
80% |
100% |
120% |
160% |
200% |
240% |
280% |
300% |
| R1 |
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| R2 |
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Calculated Properties of Jankovicite
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| Electron Density: |
Bulk Density (Electron Density)=4.40 gm/cc
note: Specific Gravity of Jankovicite =5.10 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0016692436
Boson Index = 0.9983307564 |
| Photoelectric: |
PEJankovicite = 687.87 barns/electron
U=PEJankovicite x rElectron Density=3,023.78 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Jankovicite is Not Radioactive |
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Jankovicite Classification
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| Dana Class: |
03.08.13.02 (03)Sulfides - Sulfosalts |
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(03.08)where 1 < z/y <2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(03.08.13)Dana Group |
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03.08.13.01 Rebulite Tl5Sb5As8S22 P 21/c 2/m |
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03.08.13.02 Jankovicite Tl5Sb9(As,Sb)4S22 P1 1 |
| Strunz Class: |
02.HD.20 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.H - Sulfosalts of SnS Archetype |
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02.HD -With Tl |
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02.HD.20 Jankovicite Tl5Sb9(As,Sb)4S22 P1 1 |
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Other Jankovicite Information
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| References: |
NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.81,1996) OPTIC PROP.(MinRec, v 27, p 302) |
| 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
14 - WWW-MINCRYST
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Print or Cut-and-Paste your Jankovicite Specimen Label here :
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Jankovicite
Tl5Sb9(As,Sb)4S22
Dana No: 03.08.13.02 Strunz No: 02.HD.20
Locality:
Notes:
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