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Fukuchilite

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Hanawa mine, Kazuno City, Akita Prefecture, Tohoku Region, Honshu Island, Japan
© 2007, JGW




Formula:
Cu
 
3
FeS
 
8
System:IsometricColour:Dark brownish gray
Hardness:6
Member of:Pyrite Group
Name:Named after Nobuyo Fukuchi (1877-1934), a Japanese geologist.


Perhaps the same species as the earlier named villamaninite.

Classification of Fukuchilite

IMA status:Approved
Strunz 8th edition ID:2/D.17-10
Nickel-Strunz 10th (pending) edition ID:2.EB.05a

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
E : Metal Sulfides, M: S <= 1:2
B : M:S = 1:2, with Fe, Co, Ni, PGE, etc.
Dana 8th edition ID:2.12.1.7

2 : SULFIDES
12 : AmBnXp, with (m+n):p = 1:2
Hey's CIM Ref.:3.1.24

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

Type Locality:Hanawa mine, Kazuno City, Akita Prefecture, Tohoku Region, Honshu Island, Japan
Place of Conservation of Type Material:Smithsonian 135971
Year of Discovery:1969
Associated Minerals at type locality:
PyriteCovelliteBaryteGypsum

Physical Properties of Fukuchilite

Lustre:Sub-Metallic
Diaphaneity (Transparency):Opaque
Colour:Dark brownish gray
Hardness (Mohs):6
Density (measured):4.86 g/cm3
Density (calculated):4.90 g/cm3

Crystallography of Fukuchilite

Crystal System:Isometric
Class (H-M):m3 (2/m 3) - Diploidal
Space Group:Pa3 {P21/a 3}
Cell Parameters:a = 5.58Å
Unit Cell Volume:V 173.74 ų (Calculated from Unit Cell)
Z:1
Morphology:Eutectic intergrowth with pyrite and covellite

Chemical Properties of Fukuchilite

Formula:
Cu
 
3
FeS
 
8
Essential elements:Cu, Fe, S
All elements listed in formula:Cu, Fe, S

Relationship of Fukuchilite to other Species

Member of:Pyrite Group
Other Members of Group:

- +
Aurostibite
AuSb
 
2
Cattierite
CoS
 
2
Dzharkenite
FeSe
 
2
Erlichmanite
OsS
 
2
Gaotaiite
Ir
 
3
Te
 
8
Geversite
PtSb
 
2
Hauerite
MnS
 
2
Insizwaite
Pt(Bi,Sb)
 
2
Krut'aite
CuSe
 
2
Krutovite
NiAs
 
2
Laurite
RuS
 
2
Mayingite
IrBiTe
Penroseite
(Ni,Co,Cu)Se
 
2
Pyrite
FeS
 
2
Sperrylite
PtAs
 
2
Trogtalite
CoSe
 
2
Vaesite
NiS
 
2
Villamaninite
(Cu,Ni,Co,Fe)S
 
2
Related Minerals - Nickel-Strunz Grouping):

- +
2.EB.05aAurostibite
AuSb
 
2
2.EB.05bBambollaite
Cu(Se,Te)
 
2
2.EB.05aCattierite
CoS
 
2
2.EB.05aErlichmanite
OsS
 
2
2.EB.05aGeversite
PtSb
 
2
2.EB.05aHauerite
MnS
 
2
2.EB.05aInsizwaite
Pt(Bi,Sb)
 
2
2.EB.05aKrut'aite
CuSe
 
2
2.EB.05aLaurite
RuS
 
2
2.EB.05aPenroseite
(Ni,Co,Cu)Se
 
2
2.EB.05aPyrite
FeS
 
2
2.EB.05aSperrylite
PtAs
 
2
2.EB.05aTrogtalite
CoSe
 
2
2.EB.05aVaesite
NiS
 
2
2.EB.05aVillamaninite
(Cu,Ni,Co,Fe)S
 
2
2.EB.05aDzharkenite
FeSe
 
2
2.EB.05aGaotaiite
Ir
 
3
Te
 
8
2.EB.10bAlloclasite
Co
 
1-x
Fe
 
x
AsS
2.EB.10dCostibite
CoSbS
2.EB.10aFerroselite
FeSe
 
2
2.EB.10aFrohbergite
FeTe
 
2
2.EB.10cGlaucodot
(Co
 
0.50
Fe
 
0.50
)AsS
2.EB.10aKullerudite
NiSe
 
2
2.EB.10aMarcasite
FeS
 
2
2.EB.10aMattagamite
CoTe
 
2
2.EB.10eParacostibite
CoSbS
2.EB.10ePararammelsbergite
NiAs
 
2
2.EB.10fOenite
CoSbAs
2.EB.15aAnduoite
(Ru,Os)As
 
2
2.EB.15aClinosafflorite
(Co,Fe,Ni)As
 
2
2.EB.15aLöllingite
FeAs
 
2
2.EB.15aNisbite
NiSb
 
2
2.EB.15aOmeiite
(Os,Ru)As
 
2
2.EB.15cPaxite
CuAs
 
2
2.EB.15aRammelsbergite
NiAs
 
2
2.EB.15aSafflorite
(Co,Fe,Ni)As
 
2
2.EB.15bSeinäjokite
(Fe,Ni)(Sb,As)
 
2
2.EB.20Arsenopyrite
FeAsS
2.EB.20Gudmundite
FeSbS
2.EB.20Osarsite
(Os,Ru)AsS
2.EB.20Ruarsite
(Ru,Os)AsS
2.EB.25Cobaltite
CoAsS
2.EB.25Gersdorffite
NiAsS
2.EB.25Hollingworthite
(Rh,Pt,Pd)AsS
2.EB.25Irarsite
(Ir,Ru,Rh,Pt)AsS
2.EB.25Jolliffeite
NiAsSe
2.EB.25Krutovite
NiAs
 
2
2.EB.25Maslovite
PtBiTe
2.EB.25Michenerite
PdBiTe
2.EB.25Padmaite
PdBiSe
2.EB.25Platarsite
(Pt,Rh,Ru)AsS
2.EB.25Testibiopalladite
PdTe(Sb,Te)
2.EB.25Tolovkite
IrSbS
2.EB.25Ullmannite
NiSbS
2.EB.25Willyamite
(Co,Ni)SbS
2.EB.25Changchengite
IrBiS
2.EB.25Mayingite
IrBiTe
2.EB.25Hollingsworthite
2.EB.25Kalungaite
PdAsSe
2.EB.25Milotaite
PdSbSe
2.EB.30Urvantsevite
Pd(Bi,Pb)
 
2
2.EB.35Rheniite
ReS
 
2
Related Minerals - Hey's Index Grouping:

- +
3.1.1Chalcocite
Cu
 
2
S
3.1.2Djurleite
Cu
 
31
S
 
16
3.1.3Digenite
Cu
 
9
S
 
5
3.1.4Anilite
Cu
 
7
S
 
4
3.1.5Roxbyite
Cu
 
9
S
 
5
3.1.6Spionkopite
Cu
 
39
S
 
28
3.1.7Geerite
Cu
 
8
S
 
5
3.1.8Covellite
CuS
3.1.9Berzelianite
Cu
 
2
Se
3.1.10Bellidoite
Cu
 
2
Se
3.1.11Umangite
Cu
 
3
Se
 
2
3.1.12Yarrowite
Cu
 
9
S
 
8
3.1.13Athabascaite
Cu
 
5
Se
 
4
3.1.14Klockmannite
CuSe
3.1.15Krut'aite
CuSe
 
2
3.1.16Weissite
Cu
 
2-x
Te
3.1.17Rickardite
Cu
 
7
Te
 
5
3.1.18Vulcanite
CuTe
3.1.19Bambollaite
Cu(Se,Te)
 
2
3.1.20Lautite
CuAsS
3.1.21Mgriite
Cu
 
3
AsSe
 
3
3.1.22Cubanite
CuFe
 
2
S
 
3
3.1.23Bornite
Cu
 
5
FeS
 
4
3.1.25Chalcopyrite
CuFeS
 
2
3.1.26Mooihoekite
Cu
 
9
Fe
 
9
S
 
16
3.1.27Haycockite
Cu
 
4
Fe
 
5
S
 
8
3.1.28Isocubanite
CuFe
 
2
S
 
3
3.1.29Idaite
Cu
 
5
FeS
 
6
3.1.30Nukundamite
(Cu,Fe)
 
4
S
 
4
3.1.31Putoranite
Cu
 
9
(Fe,Ni)
 
9
S
 
16
3.1.32Orickite
2CuFeS
 
2
 · H
 
2
O
3.1.33Eskebornite
CuFeSe
 
2
3.1.34Chaméanite
(Cu,Fe)
 
4
As(Se,S)
 
4
3.1.35Talnakhite
Cu
 
9
(Fe,Ni)
 
8
S
 
16

Other Names for Fukuchilite

Synonyms:
IMA1967-009
Other Languages:
German:Fukuchilit
Italian:Fukuchilite
Japanese:福地鉱
Russian:Фукучилит
Spanish:Fukuchilita

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 Fukuchilite

Reference List:

- +
American Mineralogist: 55: 1811.

Bayliss, P. (1989) American Mineralogist: 74: 1168-1176.

Internet Links for Fukuchilite

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    • Localities for Fukuchilite

    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.
    Hide Locality List
    (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.
    China
     
    • Yunnan Province
      • Chuxiong Autonomous Prefecture
        • Dayao Co.
    		Junhua Din, Yafen Wang, Zhengyun Wang, Jinghong Cai, and Jiazao Yan (1992): Journal of Guilin University of Technology 12(s1)
    France
     
    • Alsace
      • Haut-Rhin
        • Thur valley (Thann valley)
          • Kruth
    		Wittern, Journée: "Mineralien finden in den Vogesen", von Loga (Cologne), 1997
    Italy
     
    • Sardinia
      • Sassari Province
        • Ozieri
    		Ciriotti, M.E. & Blass, G. (2010): Pot-pourri 2009: identificazioni UKiS AMI Minerali italiani di interesse. Micro (UK Report), 1/2010, 124-127.
    Japan
     
    • Honshu Island
      • Tohoku Region
        • Akita Prefecture
          • Kazuno City
    		Min.Journ.Japan (1969) 5, 399-416
        • Iwate Prefecture
          • Tayama
    		Dr. Kameki Kinoshita collection (curated at Geological Survey of Japan)
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