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Siegenite

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Formula:
CoNi
 
2
S
 
4
-NiCo
 
2
S
 
4
Range of composition
System:IsometricColour:Light to steel-grey, ...
Hardness:4½ - 5½
Member of:Linnaeite Group > Thiospinel Group
Name:
Named after its discovery locality in the Siegen district, Westphalia (Germany).


Linnaeite Group and Thiospinel Group.

Formula is generally given as (Ni,Co)3S4.
Compare polydymite and linnaeite.

Classification of Siegenite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:2/D.01-80
Nickel-Strunz 10th (pending) edition ID:2.DA.05

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
D : Metal Sulfides, M: S = 3 :4 and 2:3
A : M:S = 3:4
Dana 8th edition ID:2.10.1.6

2 : SULFIDES
10 : AmBnXp, with (m+n):p = 3:4
Hey's CIM Ref.:3.11.11

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
11 : Sulphides etc. of Ni
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Type Occurrence of Siegenite

Type Locality:Stahlberg Mine (Schwabengrube), Müsen, Siegerland, North Rhine-Westphalia, Germany
Year of Discovery:1850

Occurrences of Siegenite

Geological Setting:Hydrothermal veins

Physical Properties of Siegenite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Light to steel-grey, violet-gray (tarnished)
Streak:Greyish black
Hardness (Mohs):4½ - 5½
Hardness (Vickers):VHN100=459 - 540 kg/mm2
Cleavage:Imperfect/Fair
Imperfect on {001}
Fracture:Irregular/Uneven, Sub-Conchoidal
Density (measured):4.5 - 4.8 g/cm3
Density (calculated):4.83 g/cm3

Crystallography of Siegenite

Crystal System:Isometric
Class (H-M):m3m (4/m 3 2/m) - Hexoctahedral
Space Group:Fd3m {F41/d 3 2/m}
Cell Parameters:a = 9.41Å
Unit Cell Volume:V 833.24 ų (Calculated from Unit Cell)
Z:8
Morphology:Octahedral crystals, massive, granular, compact
Twinning:On {111}, may be polysynthetic
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Chemical Properties of Siegenite

Formula:
CoNi
 
2
S
 
4
-NiCo
 
2
S
 
4


Range of composition
Simplified for copy/paste:CoNi2S4 -NiCo2S4
Essential elements:Co, Ni, S
All elements listed in formula:Co, Ni, S
Common Impurities:Se,Cu,Fe

Relationship of Siegenite to other Species

Series:Forms a series with Violarite (see here)
Member of:Linnaeite Group > Thiospinel Group
Other Members of Group:

- +
Bornhardtite
Co
2+
 
Co
3+
2
Se
 
4
Cadmoindite
CdIn
 
2
S
 
4
Carrollite
Cu(Co,Ni)
 
2
S
 
4
Cuproiridsite
(Cu,Fe)Ir
 
2
S
 
4
Cuprokalininite
CuCr
 
2
S
 
4
Cuprorhodsite
(Cu,Fe)Rh
 
2
S
 
4
Daubréelite
Fe
2+
 
Cr
3+
2
S
 
4
Ferrorhodsite
(Fe,Cu)(Rh,Ir,Pt)
 
2
S
 
4
Fletcherite
Cu(Ni,Co)
 
2
S
 
4
Florensovite
(Cu,Zn)Cr
 
1.5
Sb
 
0.5
S
 
4
Greigite
Fe
2+
 
Fe
3+
2
S
 
4
Indite
FeIn
 
2
S
 
4
Kalininite
ZnCr
 
2
S
 
4
Linnaeite
Co
2+
 
Co
3+
2
S
 
4
Malanite
Cu(Pt
3+
 
,Ir
3+
 
)
 
2
S
 
4
Polydymite
Ni
2+
 
Ni
3+
2
S
 
4
Trüstedtite
Ni
 
3
Se
 
4
Tyrrellite
Cu(Co
3+
 
,Ni
3+
 
)
 
2
Se
 
4
Violarite
Fe
2+
 
Ni
3+
2
S
 
4
Xingzhongite
(Pb,Cu,Fe)(Ir,Pt,Rh)
 
2
S
 
4
Related Minerals - Nickel-Strunz Grouping):

- +
2.DA.05Bornhardtite
Co
2+
 
Co
3+
2
Se
 
4
2.DA.05Carrollite
Cu(Co,Ni)
 
2
S
 
4
2.DA.05Cuproiridsite
(Cu,Fe)Ir
 
2
S
 
4
2.DA.05Cuprorhodsite
(Cu,Fe)Rh
 
2
S
 
4
2.DA.05Daubréelite
Fe
2+
 
Cr
3+
2
S
 
4
2.DA.05Fletcherite
Cu(Ni,Co)
 
2
S
 
4
2.DA.05Florensovite
(Cu,Zn)Cr
 
1.5
Sb
 
0.5
S
 
4
2.DA.05Greigite
Fe
2+
 
Fe
3+
2
S
 
4
2.DA.05Indite
FeIn
 
2
S
 
4
2.DA.05Kalininite
ZnCr
 
2
S
 
4
2.DA.05Linnaeite
Co
2+
 
Co
3+
2
S
 
4
2.DA.05Malanite
Cu(Pt
3+
 
,Ir
3+
 
)
 
2
S
 
4
2.DA.05Polydymite
Ni
2+
 
Ni
3+
2
S
 
4
2.DA.05Trüstedtite
Ni
 
3
Se
 
4
2.DA.05Tyrrellite
Cu(Co
3+
 
,Ni
3+
 
)
 
2
Se
 
4
2.DA.05Violarite
Fe
2+
 
Ni
3+
2
S
 
4
2.DA.05Xingzhongite
(Pb,Cu,Fe)(Ir,Pt,Rh)
 
2
S
 
4
2.DA.05Ferrorhodsite
(Fe,Cu)(Rh,Ir,Pt)
 
2
S
 
4
2.DA.05Cadmoindite
CdIn
 
2
S
 
4
2.DA.05Cuprokalininite
CuCr
 
2
S
 
4
2.DA.10Rhodostannite
Cu
 
2
FeSn
 
3
S
 
8
2.DA.10Toyohaite
Ag
 
2
FeSn
 
3
S
 
8
2.DA.15Brezinaite
Cr
 
3
S
 
4
2.DA.15Heideite
(Fe,Cr)
 
1.15
(Ti,Fe)
 
2
S
 
4
2.DA.20Inaglyite
Cu
 
3
Pb(Ir,Pt)
 
8
S
 
16
2.DA.20Konderite
Cu
 
3
Pb(Rh,Pt,Ir)
 
8
S
 
16
2.DA.25Kingstonite
(Rh,Ir,Pt)
 
3
S
 
4
Related Minerals - Hey's Index Grouping:

- +
3.11.1Heazlewoodite
Ni
 
3
S
 
2
3.11.2Godlevskite
(Ni,Fe)
 
9
S
 
8
3.11.3Millerite
NiS
3.11.4Polydymite
Ni
2+
 
Ni
3+
2
S
 
4
3.11.5Vaesite
NiS
 
2
3.11.6Shandite
Ni
 
3
Pb
 
2
S
 
2
3.11.7Donharrisite
Ni
 
8
Hg
 
3
S
 
9
3.11.8Violarite
Fe
2+
 
Ni
3+
2
S
 
4
3.11.9Pentlandite
(Fe,Ni)
 
9
S
 
8
3.11.10Bravoite
(Fe,Ni)S
 
2
3.11.12Fletcherite
Cu(Ni,Co)
 
2
S
 
4
3.11.13Villamaninite
(Cu,Ni,Co,Fe)S
 
2
3.11.14Mäkinenite
γ-NiSe
3.11.15Sederholmite
beta-NiSe
3.11.16Trüstedtite
Ni
 
3
Se
 
4
3.11.17Wilkmanite
Ni
 
3
Se
 
4
3.11.18Kullerudite
NiSe
 
2
3.11.19Penroseite
(Ni,Co,Cu)Se
 
2
3.11.20Tyrrellite
Cu(Co
3+
 
,Ni
3+
 
)
 
2
Se
 
4
3.11.21Imgreite
NiTe (?)
3.11.22Melonite
NiTe
 
2
3.11.23Kitkaite
NiTeSe
3.11.24Dienerite
3.11.25Orcelite
Ni
 
5-x
As
 
2
3.11.26Maucherite
Ni
 
11
As
 
8
3.11.27Nickeline
NiAs
3.11.28Rammelsbergite
NiAs
 
2
3.11.29Pararammelsbergite
NiAs
 
2
3.11.30Nickelskutterudite
NiAs
 
2-3
3.11.31Oregonite
Ni
 
2
FeAs
 
2
3.11.32Westerveldite
(Fe,Ni,Co)As
3.11.33Langisite
(Co,Ni)As
3.11.34Gersdorffite
NiAsS
3.11.35Jolliffeite
NiAsSe
3.11.36Breithauptite
NiSb
3.11.38Ullmannite
NiSbS
3.11.39Willyamite
(Co,Ni)SbS

Other Names for Siegenite

Synonyms:
Müsenite
Other Languages:
German:Müsenit
Siegenit
Russian:Зигенит
Simplified Chinese:硫钴镍矿
块硫镍钴矿
硫镍钴矿
Spanish:Müsenita
Siegenita
Traditional Chinese:硫鈷鎳礦
硫鎳鈷礦

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 Siegenite

Reference List:

- +
Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 262-265.

Petruk, W., Harris, D.C., and Stewart, J.M. (1969) Langisite, a new mineral, and the rare minerals cobalt pentlandite, siegenite, parkerite, and bravoite from the Langis mine, Cobalt-Gowganda area, Ontario, Canada. Canadian Mineralogist: 9: 597-605.

Geoch. Min. Petr. Bulgaria Acad. Sci. (1976), 4, 35.

Mineralogical Magazine (1980): 44: 733.

Internet Links for Siegenite

Search Engines:
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  • External Links:
  • Look for Siegenite on Webmineral
  • Look for Siegenite on Athena Mineralogy
  • Look for Siegenite on Wikipedia
  • Look for Siegenite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Siegenite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
  • Buy from McDougall Minerals
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  • Search for Siegenite on Well-Arranged Molecules
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  • Localities for Siegenite

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