Jankovićite
A valid IMA mineral species
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About Jankovićite
Formula:
Tl5Sb9(As,Sb)4S22
Colour:
Black
Lustre:
Metallic
Hardness:
2
Specific Gravity:
5.08 (Calculated)
Crystal System:
Triclinic
Name:
Named in honor of Slobodan Janković (21 August 1925, Arandjelovac, Serbia, Yugoslavia - ), Professor in the Faculty of Mining and Geology, University of Belgrade, Yugoslavia (now Serbia), in recognition of his work on the mineralogy and geology of the Allchar Tl-As-Sb deposit.
Chemically, the Sb-dominant analogue of rebulite (monoclinic). Also compare gungerite, drechslerite, gillulyite, and pierrotite.
Unique Identifiers
Mindat ID:
2075
Long-form identifier:
mindat:1:1:2075:2
GUID
(UUID V4):
(UUID V4):
d82a63fd-2bdd-4a23-8a9a-a1404582fae0
IMA Classification of Jankovićite
Approved
First published:
1995
Classification of Jankovićite
2.HD.20
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
D : With Tl
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
D : With Tl
3.8.13.2
3 : SULFOSALTS
8 : 1 < ø < 2
3 : SULFOSALTS
8 : 1 < ø < 2
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Jkv | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Jankovićite
Metallic
Transparency:
Opaque
Colour:
Black
Streak:
Brown-violet
Hardness:
2 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
Parallel to (100)
Parallel to (100)
Fracture:
Sub-Conchoidal
Density:
5.08 g/cm3 (Calculated)
Optical Data of Jankovićite
Anisotropism:
Distinct to strong, gray-blue to green-blue
Bireflectance:
low to medium bireflectance to grayish-bluish white
Reflectivity:
| Wavelength | R1 | R2 |
|---|---|---|
| 400nm | 34.7% | 37.4% |
| 420nm | 34.6% | 37.2% |
| 440nm | 34.5% | 37.1% |
| 460nm | 34.2% | 36.8% |
| 470nm | 34.0% | 36.7% |
| 480nm | 33.8% | 36.6% |
| 500nm | 33.4% | 36.2% |
| 520nm | 32.8% | 35.8% |
| 540nm | 32.2% | 35.1% |
| 546nm | 32.0% | 34.9% |
| 560nm | 31.6% | 34.4% |
| 580nm | 30.8% | 33.5% |
| 589nm | 30.5% | 33.0% |
| 600nm | 30.1% | 32.5% |
| 620nm | 29.3% | 31.4% |
| 640nm | 28.5% | 30.3% |
| 650nm | 28.1% | 29.7% |
| 660nm | 27.7% | 29.1% |
| 680nm | 26.8% | 27.8% |
| 700nm | 25.8% | 26.4% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 37.4%.
R1 shown in black, R2 shown in red
Colour in reflected light:
White
Internal Reflections:
Red
Chemistry of Jankovićite
Mindat Formula:
Tl5Sb9(As,Sb)4S22
Elements listed:
Crystallography of Jankovićite
Crystal System:
Triclinic
Class (H-M):
1 - Pedial
Space Group:
P1
Cell Parameters:
a = 7.393(4) Å, b = 8.711(5) Å, c = 17.58(1) Å
α = 103.81(3)°, β = 91.81(3)°, γ = 109.51(3)°
α = 103.81(3)°, β = 91.81(3)°, γ = 109.51(3)°
Ratio:
a:b:c = 0.849 : 1 : 2.018
Unit Cell V:
1,028.62 ų (Calculated from Unit Cell)
Z:
1
Morphology:
Hypidiomorphic or tabular crystals to 1 mm.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.4590 Å | (100) |
| 3.0755 Å | (65) |
| 3.3884 Å | (64) |
| 2.2868 Å | (57) |
| 3.1774 Å | (54) |
| 2.8019 Å | (44) |
| 1.7364 Å | (38) |
Comments:
Allchar, North Macedonia. Data from the type description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) | |
| High-𝑇 alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Type Occurrence of Jankovićite
General Appearance of Type Material:
Coarse, hypidiomorphic or tabular grains, with a maximum size of less than 1 mm.
Place of Conservation of Type Material:
Natural History Museum Vienna and Natural History Museum Belgrade, Serbia.
Geological Setting of Type Material:
Low temperature T1-Sb-As sulfide ore deposit.
Associated Minerals at Type Locality:
Reference:
Cvetković, L., Boronikhin, V.A., Pavićević, M.K., Krajnović, D., Gržetić, I., Libowitzky, E., Giester, G., Tillmanns, E. (1995) Jankovićite, Tl5Sb9(As,Sb)4S22, a new Tl-sulfosalt from Allchar, Macedonia. Mineralogy and Petrology: 53: 125-131.
Synonyms of Jankovićite
Other Language Names for Jankovićite
Common Associates
Associated Minerals Based on Photo Data:
| 15 photos of Jankovićite associated with Realgar | As4S4 |
| 5 photos of Jankovićite associated with Orpiment | As2S3 |
| 2 photos of Jankovićite associated with Quartz | SiO2 |
| 2 photos of Jankovićite associated with Calcite | CaCO3 |
| 1 photo of Jankovićite associated with Baryte | BaSO4 |
| 1 photo of Jankovićite associated with Fluorite | CaF2 |
Related Minerals - Strunz-mindat Grouping
| 2.HD. | Boscardinite | TlPb4(Sb7As2)S18 |
| 2.HD. | Enneasartorite | Tl6Pb32As70S140 |
| 2.HD. | Gungerite | TlAs5Sb4S13 |
| 2.HD. | Shimenite | Tl5Sb21-yAsyS34 |
| 2.HD. | Dewitite | AgzTl10-x-zPb2xSb42-x-yAsyS68 |
| 2.HD. | Vallouiseite | Ag3Tl21.5PbSb63As41.5S170 |
| 2.HD. | Buynite | TlPb14As17S40 |
| 2.HD. | Giuşcăite | Ag2Tl4Pb4As20Sb2S40 |
| 2.HD.05e | Chabournéite | AgzTl8-x-zPb4+2xSb40-x-yAsyS68 with 0.00 < x < 0.40(9), 16.15(3)< y < 19.11(10), 0.04(4) < z < 0.11(6) |
| 2.HD.05 | Lorándite | TlAsS2 |
| 2.HD.05 | Weissbergite | TlSbS2 |
| 2.HD.05e | Dalnegroite | (Tl4Pb2)(As12Sb8)S34 |
| 2.HD.15 | Christite | TlHgAsS3 |
| 2.HD.15 | Richardsollyite | TlPbAsS3 |
| 2.HD.25 | Rebulite | Tl5Sb5As8S22 |
| 2.HD.30 | Imhofite | Tl5.8As15.4S26 |
| 2.HD.35 | Edenharterite | PbTlAs3S6 |
| 2.HD.40 | Jentschite | TlPbAs2SbS6 |
| 2.HD.45 | Hutchinsonite | TlPbAs5S9 |
| 2.HD.45 | Protochabournéite | Tl4-xPb2+2xSb20-x-yAsyS34 with 0.02(2) < x < 0.34(2), 5.71(9) < y < 6.69(9) |
| 2.HD.50 | Bernardite | TlAs5S8 |
| 2.HD.55 | Sicherite | TlAg2(As,Sb)3S6 |
| 2.HD.55 | Geuerite | Ag2Tl4Pb4As22S40 |
| 2.HD.60 | Gabrielite | Tl6Ag3Cu6(As,Sb)9S21 |
| 2.HD.65 | Tsygankoite | Mn8Tl8Hg2(Sb21Pb2Tl)S48 |
| 2.HD.70 | Drechslerite | Tl4(Sb4-xAsx)S8 (1 < x < 2) |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Jankovićite
mindat.org URL:
https://www.mindat.org/min-2075.html
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References for Jankovićite
Reference List:
Localities for Jankovićite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
China | |
| EMPA / WDS analyses by D. Topa |
North Macedonia | |
| Cvetković et al. (1995) +1 other reference |
| Cvetković et al. (1995) +4 other references | |
Russia | |
| Kasatkin et al. (2022) |
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Jiepaiyu Mine, Shimen deposit, Shimen Co., Changde, Hunan, China