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Jentschite

A valid IMA mineral species
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About JentschiteHide

Formula:
TlPbAs2SbS6
Colour:
Black
Lustre:
Metallic, Sub-Metallic
Hardness:
2 - 2½
Specific Gravity:
5.24 (Calculated)
Crystal System:
Monoclinic
Name:
The name honours Franz Jentsch (1868–1908), an early prolific collector of Lengenbach minerals.
This page provides mineralogical data about Jentschite.


Unique IdentifiersHide

Mindat ID:
5745
Long-form identifier:
mindat:1:1:5745:1
GUID
(UUID V4):
fe3f48dc-f11b-4d71-8f7c-17d4d641a410

IMA Classification of JentschiteHide

Classification of JentschiteHide

2.HD.40

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
D : With Tl

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
JtsIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of JentschiteHide

Metallic, Sub-Metallic
Colour:
Black
Streak:
Dark red
Hardness:
2 - 2½ on Mohs scale
Hardness:
VHN10=38 - 51 kg/mm2 - Vickers
Tenacity:
Very brittle
Cleavage:
Perfect
On {101}
Density:
5.24 g/cm3 (Calculated)

Optical Data of JentschiteHide

Anisotropism:
Distinct
Reflectivity:
WavelengthR1R2
470nm29.7%35.4%
543nm28.8%33.1%
587nm26.7%30.3%
657nm26.6%29.9%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 35.4%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Pale gray

Chemistry of JentschiteHide

Mindat Formula:
TlPbAs2SbS6

Crystallography of JentschiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 8.0958(5) Å, b = 23.917(2) Å, c = 5.8876(5) Å
β = 108.063(8)°
Ratio:
a:b:c = 0.338 : 1 : 0.246
Unit Cell V:
1,083.82 ų (Calculated from Unit Cell)
Z:
4
Comment:
Space-group setting P21/n.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0015411JentschiteBerlepsch P (1996) Crystal structure and crystal chemistry of the homeotypes edenharterite (TlPbAs3S6) and jentschite (TlPbAs2SbS6) from Lengenbach, Binntal (Switzerland) Schweizerische Mineralogische und Petrographische Mitteilungen 76 147-1571996Lengenbach quarry, Binntal, Valais, Switzerland0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.823 Å(100)
3.587 Å(86)
2.778 Å(84)
3.998 Å(74)
2.670 Å(58)
3.816 Å(54)
5.346 Å(32)

Geological EnvironmentHide

Paragenetic Mode(s):

Type Occurrence of JentschiteHide

Place of Conservation of Type Material:
Natural History Museum; Mineralogical Institute, University of Basel, Basel, Switzerland.
Geological Setting of Type Material:
Hydrothermal
Associated Minerals at Type Locality:
Reference:
Graeser, S., Edenharter, A. (1997) Jentschite (TlPbAs2SbS6)–a new sulphosalt mineral from Lengenbach, Binntal (Switzerland). Mineralogical Magazine: 61: 131–137.

Synonyms of JentschiteHide

Other Language Names for JentschiteHide

German:Jentschit
Simplified Chinese:辉砷银铅矿
Spanish:Jentschita

Common AssociatesHide

Associated Minerals Based on Photo Data:
4 photos of Jentschite associated with RealgarAs4S4
1 photo of Jentschite associated with NowackiiteCu6Zn3As4S12
1 photo of Jentschite associated with SphaleriteZnS
1 photo of Jentschite associated with DolomiteCaMg(CO3)2

Related Minerals - Strunz-mindat GroupingHide

2.HD.BoscardiniteTlPb4(Sb7As2)S18Tric. 1 : P1
2.HD.EnneasartoriteTl6Pb32As70S140Mon. 2/m : P21/b
2.HD.GungeriteTlAs5Sb4S13Orth. mmm (2/m 2/m 2/m) : Pbcn
2.HD.ShimeniteTl5Sb21-yAsyS34Tric. 1 : P1
2.HD.DewititeAgzTl10-x-zPb2xSb42-x-yAsyS68Tric. 1 : P1
2.HD.VallouiseiteAg3Tl21.5PbSb63As41.5S170Tric. 1 : P1
2.HD.BuyniteTlPb14As17S40Mon. 2 : P21
2.HD.05eChabournéiteAgzTl8-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)Tric. 1 : P1
2.HD.05LoránditeTlAsS2Mon. 2/m : P21/b
2.HD.05WeissbergiteTlSbS2Tric. 1 : P1
2.HD.05eDalnegroite(Tl4Pb2)(As12Sb8)S34Tric. 1 : P1
2.HD.15ChristiteTlHgAsS3Orth. mmm (2/m 2/m 2/m) : Cmca
2.HD.15RichardsollyiteTlPbAsS3Mon. 2/m : P21/b
2.HD.20JankovićiteTl5Sb9(As,Sb)4S22Tric. 1 : P1
2.HD.25RebuliteTl5Sb5As8S22Mon. 2/m : P21/b
2.HD.30ImhofiteTl5.8As15.4S26Mon. 2/m
2.HD.35EdenharteritePbTlAs3S6Orth. mm2 : Fdd2
2.HD.45HutchinsoniteTlPbAs5S9Orth. mmm (2/m 2/m 2/m) : Pbca
2.HD.45ProtochabournéiteTl4-xPb2+2xSb20-x-yAsyS34 with 0.02(2) < x < 0.34(2), 5.71(9) < y < 6.69(9)Tric. 1 : P1
2.HD.50BernarditeTlAs5S8Mon. 2/m : P21/b
2.HD.55SicheriteTlAg2(As,Sb)3S6Orth.
2.HD.60GabrieliteTl6Ag3Cu6(As,Sb)9S21Tric. 1 : P1
2.HD.65TsygankoiteMn8Tl8Hg2(Sb21Pb2Tl)S48Mon. 2/m : B2/m
2.HD.70DrechsleriteTl4(Sb4-xAsx)S8 (1 < x < 2)Tric. 1 : P1

Other InformationHide

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 JentschiteHide

References for JentschiteHide

Localities for JentschiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Russia
 
  • Sverdlovsk Oblast
    • Serovsky District
      • Turya river
        • Tur'insk
Switzerland (TL)
 
  • Valais
    • Goms
      • Binn
        • Fäld
 
Mineral and/or Locality  
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