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Thalfenisite

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Formula:
Tl
 
6
(Fe,Ni,Cu)
 
25
S
 
26
Cl
Colour:BrownHardness:1 - 1½
Member of:Djerfisherite Group
Name:The name reflects its composition: thallium, iron (latin "ferrum"), nickel and sulfur.


Djerfisherite Group

Classification of Thalfenisite

IMA status:Approved 1979
Strunz 8th edition ID:2/F.06-20
Nickel-Strunz 10th (pending) edition ID:2.FC.05

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
F : Sulfides of arsenic, alkalies; sulfides with halide, oxide, hydroxide, H2O
C : With Cl, Br, I (halide-sulfides)
Dana 8th edition ID:2.15.2.2

2 : SULFIDES
15 : Chlor-sulfides
Hey's CIM Ref.:6.5.12

6 : Sulphosalts - Sulphostannates, Sulphogermanates,Sulpharsenates, Sulphantimonates, Sulphovanadates and Sulphohalides
5 : Sulphohalides
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Type Occurrence of Thalfenisite

Type Locality:Oktyabr'skoe Cu-Ni deposit (Oktyabr'skoye; Oktyabr'sky), Talnakh Cu-Ni Deposit, Noril'sk, Putoran Plateau, Taimyr Peninsula, Taymyrskiy Autonomous Okrug, Eastern-Siberian Region, Russia
Year of Discovery:1979

Physical Properties of Thalfenisite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Brown
Hardness (Mohs):1 - 1½

Chemical Properties of Thalfenisite

Formula:
Tl
 
6
(Fe,Ni,Cu)
 
25
S
 
26
Cl
Simplified for copy/paste:Tl6(Fe,Ni,Cu)25S26Cl
Essential elements:Cl, Fe, S, Tl
All elements listed in formula:Cl, Cu, Fe, Ni, S, Tl
Common Impurities:K

Relationship of Thalfenisite to other Species

Member of:Djerfisherite Group
Other Members of Group:

- +
Cu-djerfisherite
K
 
6
(Cu,Fe)
 
25
S
 
26
Cl
Djerfisherite
K
 
6
(Fe,Cu,Ni)
 
25
S
 
26
Cl
Owensite
(Ba,Pb)
 
6
(Cu,Fe,Ni)
 
25
S
 
27
Related Minerals - Nickel-Strunz Grouping):

- +
2.FC.05Djerfisherite
K
 
6
(Fe,Cu,Ni)
 
25
S
 
26
Cl
2.FC.05Owensite
(Ba,Pb)
 
6
(Cu,Fe,Ni)
 
25
S
 
27
2.FC.10Bartonite
K
 
6
Fe
 
20
S
 
26
S
2.FC.10Chlorbartonite
K
 
6
Fe
 
24
S
 
26
(Cl,S)
2.FC.15aArzakite
Hg
2+
3
S
 
2
(Br,Cl)
 
2
2.FC.15aCorderoite
Hg
2+
3
S
 
2
Cl
 
2
2.FC.15cGrechishchevite
Hg
2+
3
S
 
2
(Br,Cl,I)
 
2
2.FC.15aLavrentievite
Hg
2+
3
S
 
2
(Cl,Br)
 
2
2.FC.15dRadtkeite
Hg
2+
3
S
 
2
ICl
2.FC.15bKenhsuite
Hg
2+
3
S
 
2
Cl
 
2
2.FC.20aCapgaronnite
HgAgS(Cl,Br,I)
2.FC.20cPerroudite
Hg
 
5
Ag
 
4
S
 
5
(I,Br)
 
2
Cl
 
2
2.FC.20bIltisite
HgAgS(Cl,Br)
2.FC.25Demicheleite-(Br)
BiSBr
2.FC.25Demicheleite-(Cl)
BiSCl
Related Minerals - Hey's Index Grouping:

- +
6.5.1Corderoite
Hg
2+
3
S
 
2
Cl
 
2
6.5.2Arzakite
Hg
2+
3
S
 
2
(Br,Cl)
 
2
6.5.3Lavrentievite
Hg
2+
3
S
 
2
(Cl,Br)
 
2
6.5.4Grechishchevite
Hg
2+
3
S
 
2
(Br,Cl,I)
 
2
6.5.5Radtkeite
Hg
2+
3
S
 
2
ICl
6.5.6Capgaronnite
HgAgS(Cl,Br,I)
6.5.7Perroudite
Hg
 
5
Ag
 
4
S
 
5
(I,Br)
 
2
Cl
 
2
6.5.8Ardaite
Pb
 
19
Sb
 
13
S
 
35
Cl
 
7
6.5.9Dadsonite
Pb
 
23
Sb
 
25
S
 
60
Cl
6.5.10Radhakrishnaite
PbTe
 
3
(Cl,S)
 
2
6.5.11Djerfisherite
K
 
6
(Fe,Cu,Ni)
 
25
S
 
26
Cl

Other Names for Thalfenisite

Synonyms:
IMA1979-018
Other Languages:
German:Thalfenisit
Simplified Chinese:硫镍铁铊矿
Spanish:Thalfenisita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Thalfenisite

Reference List:

- +
Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (1979): 108: 696-701.

American Mineralogist (1981): 66: 219.

Internet Links for Thalfenisite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Thalfenisite details from Handbook of Mineralogy (PDF)
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  • Localities for Thalfenisite

    The 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.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Russia
     
    • Eastern-Siberian Region
      • Taymyrskiy Autonomous Okrug
        • Taimyr Peninsula
          • Putoran Plateau
            • Noril'sk
              • Talnakh Cu-Ni Deposit
    ZVMO,(1979) 108, 696-701; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
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    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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