Rudashevskii, N.S., Karpenov, A.M., Shipova, G.S., Shishkin, N.N., Ryabkin, V.A. (1979) Thalfenisite, the thallium analogue of djerfisherite. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 108(6): 696-701.

Classification of ThalfenisiteHide

Strunz-mindat (2024):

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 ed.:

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

Mineral SymbolsHide

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

Symbol	Source	Reference
Tfn	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 ThalfenisiteHide

Lustre:

Metallic

Transparency:

Opaque

Colour:

Brown

Hardness:

1 - 1½ on Mohs scale

Hardness:

VHN₁₀=130 - 164 kg/mm² - Vickers

Tenacity:

Brittle

Density:

5.26 g/cm³ (Calculated)

Optical Data of ThalfenisiteHide

Type:

Isotropic

Reflectivity:

Wavelength	R
440nm	23.6%
560nm	25.6%
600nm	27.3%
680nm	30.3%

Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 30.3%.

Colour in reflected light:

Brown in reflected light, dark brown in oil

Chemistry of ThalfenisiteHide

Mindat Formula:

Tl₆(Fe,Ni,Cu)₂₅S₂₆Cl

Elements listed:

Cl, Cu, Fe, Ni, S, Tl - search for minerals with similar chemistry

Common Impurities:

Crystallography of ThalfenisiteHide

Crystal System:

Isometric

Cell Parameters:

a = 10.29(2) Å

Unit Cell V:

1,089.55 Å³ (Calculated from Unit Cell)

Comment:

Point Group: n.d.; Space Group: n.d.

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
3.42 Å	(90)
3.24 Å	(70)
2.96 Å	(100)
2.35 Å	(60)
1.810 Å	(70)

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 3b: Earth’s earliest hydrosphere	>4.45
12 : Hadean hydrothermal subsurface sulfide deposits (see also #33)
Stage 4b: Highly evolved igneous rocks	>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of ThalfenisiteHide

Type Locality:

ⓘ Oktyabrsky Mine, Talnakh Cu-Ni Deposit, Noril'sk, Putoran Plateau, Taimyr Peninsula, Taymyrskiy Autonomous Okrug, Krasnoyarsk Krai, Russia

General Appearance of Type Material:

As grains, to 5 µm, in aggregates.

Place of Conservation of Type Material:

Mining Institute, St. Petersburg, Russia, 1128/1

Associated Minerals at Type Locality:

Pentlandite

Galena

Chalcopyrite

Reference:

Download:

https://rruff.info/rruff_1.0/uploads/ZVMO108N6_696.pdf

Synonyms of ThalfenisiteHide

IMA1979-018

Other Language Names for ThalfenisiteHide

German:Thalfenisit

Simplified Chinese:硫镍铁铊矿

Spanish:Thalfenisita

Relationship of Thalfenisite to other SpeciesHide

Member of:

Djerfisherite Group

Other Members of this group:

Cu-djerfisherite	K₆(Cu,Fe)₂₅S₂₆Cl
Djerfisherite	K₆(Fe,Cu,Ni)₂₅S₂₆Cl	Iso. m3m (4/m 3 2/m) : Pm3m
Gmalimite	K₆◻Fe²⁺₂₄S₂₇	Iso. m3m (4/m 3 2/m) : Pm3m
Owensite	(Ba,Pb)₆(Cu,Fe,Ni)₂₅S₂₇	Iso. m3m (4/m 3 2/m) : Pm3m
Zoharite	(Ba,K)₆(Fe,Cu,Ni)₂₅S₂₇	Iso. m3m (4/m 3 2/m) : Pm3m

Common AssociatesHide

Associated Minerals Based on Photo Data:

3 photos of Thalfenisite associated with Galena	PbS
3 photos of Thalfenisite associated with Chalcopyrite	CuFeS₂
2 photos of Thalfenisite associated with Pentlandite	(Ni_xFe_y)_Σ9S₈
2 photos of Thalfenisite associated with Pyrrhotite	Fe_1-xS
1 photo of Thalfenisite associated with Silver	Ag

Related Minerals - Strunz-mindat Grouping Hide

2.FC.	Demicheleite-(I)	BiSI	Orth. mmm (2/m 2/m 2/m) : Pnma
2.FC.05	Djerfisherite	K₆(Fe,Cu,Ni)₂₅S₂₆Cl	Iso. m3m (4/m 3 2/m) : Pm3m
2.FC.05	Owensite	(Ba,Pb)₆(Cu,Fe,Ni)₂₅S₂₇	Iso. m3m (4/m 3 2/m) : Pm3m
2.FC.05	Cu-djerfisherite	K₆(Cu,Fe)₂₅S₂₆Cl
2.FC.05	Zoharite	(Ba,K)₆(Fe,Cu,Ni)₂₅S₂₇	Iso. m3m (4/m 3 2/m) : Pm3m
2.FC.05	Gmalimite	K₆◻Fe²⁺₂₄S₂₇	Iso. m3m (4/m 3 2/m) : Pm3m
2.FC.10	Bartonite	K₆Fe₂₀S₂₆S	Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
2.FC.10	Chlorbartonite	K₆Fe₂₄S₂₆(Cl,S)	Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
2.FC.15a	Arzakite	Hg²⁺₃S₂(Br,Cl)₂	Mon.
2.FC.15a	Corderoite	Hg²⁺₃S₂Cl₂	Iso. m3 (2/m 3)
2.FC.15c	Grechishchevite	Hg²⁺₃S₂(Br,Cl,I)₂	Tet.
2.FC.15a	Lavrentievite	Hg²⁺₃S₂(Cl,Br)₂	Mon.
2.FC.15d	Radtkeite	Hg²⁺₃S₂ICl	Mon. 2/m : B2/m
2.FC.15b	Kenhsuite	Hg²⁺₃S₂Cl₂	Orth.
2.FC.20a	Capgaronnite	AgHgClS	Orth. mmm (2/m 2/m 2/m)
2.FC.20c	Perroudite	Hg₅Ag₄S₅(I,Br)₂Cl₂	Orth. 2 2 2 : P2₁ 2₁ 2
2.FC.20b	Iltisite	HgAgSCl	Hex.
2.FC.20d	Hanauerite	AgHgSI	Orth. mmm (2/m 2/m 2/m) : Pmma
2.FC.25	Demicheleite-(Br)	BiSBr	Orth. mmm (2/m 2/m 2/m) : Pnma
2.FC.25	Demicheleite-(Cl)	BiSCl	Orth. mmm (2/m 2/m 2/m) : Pnma

Other InformationHide

Notes:

Not reactive with FeCl3, HCl, or HNO3(1:1); intensely etched by concentrated HNO3.

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 ThalfenisiteHide

mindat.org URL:

https://www.mindat.org/min-3932.html
Please feel free to link to this page.

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External Links:

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Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

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References for ThalfenisiteHide

Reference List:

Fleischer, Michael, Chao, George Y., Francis, Carl A., Pabst, and Adolf (1981) New Mineral Names. American Mineralogist, 66 (1-2) 217-220 p.219

Barkov, A.Y., Laajoki, K.V.O., Gehör, S.A., Yakovlev, Y.N., Taikina-Aho, O. (1997) Chlorine-poor analogues of djerfisherite - thalfenisite from Noril'sk, Siberia and Salmagorsky, Kola Peninsula, Russia. The Canadian Mineralogist: 35: 1421-1430.

Jambor, J.L., Roberts, A.C. (1999) New mineral names. American Mineralogist: 84: 193-198.

(2023) Thalfenisite. Handbook of Mineralogy. Mineralogical Society of America

Localities for ThalfenisiteHide

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 (TL)

Krasnoyarsk Krai

Taymyrskiy Autonomous Okrug

Taimyr Peninsula

Putoran Plateau

Noril'sk

Talnakh Cu-Ni Deposit

ⓘ Oktyabrsky Mine (TL)

Rudashevskii et al. (1979) +1 other reference

Thalfenisite

About ThalfenisiteHide

Unique IdentifiersHide

IMA Classification of ThalfenisiteHide