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Fukuchilite

A valid IMA mineral species
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03441360017271923212251.jpg
Fukuchilite

Hanawa mine, Tayama, Hachimantai City, Iwate Prefecture, Japan
07812750017271923243613.jpg
Fukuchilite

Hanawa mine, Kazuno City, Akita Prefecture, Japan
08039220017271923337146.jpg
Fukuchilite, etc.

Hanawa mine, Kazuno City, Akita Prefecture, Japan
03441360017271923212251.jpg
Fukuchilite

Hanawa mine, Tayama, Hachimantai City, Iwate Prefecture, Japan
07812750017271923243613.jpg
Fukuchilite

Hanawa mine, Kazuno City, Akita Prefecture, Japan
08039220017271923337146.jpg
Fukuchilite, etc.

Hanawa mine, Kazuno City, Akita Prefecture, Japan
03441360017271923212251.jpg
Fukuchilite

Hanawa mine, Tayama, Hachimantai City, Iwate Prefecture, Japan
07812750017271923243613.jpg
Fukuchilite

Hanawa mine, Kazuno City, Akita Prefecture, Japan
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About FukuchiliteHide

08734910017271923392410.jpg
Nobuyo Fukuchi
Formula:
Cu3FeS8
Colour:
Dark brownish gray
Lustre:
Sub-Metallic
Hardness:
6
Specific Gravity:
4.86
Crystal System:
Isometric
Member of:
Pyrite Group
Name:
Named in honor of Nobuyo Fukuchi (福地 信世) (15 July 1877, Shimokuta-ku, Tokyo, Japan - 22 May 1934), a Japanese geologist who studied many Kuroko-type ore deposits. He worked for the Furukawa Mining Company and later as a lecturer at the Imperial University.
Perhaps the same species as the earlier named villamaninite.
Bayliss (1989) thinks fukuchilite may be a ferroan villamaninite.



Unique IdentifiersHide

Mindat ID:
1620
Long-form identifier:
mindat:1:1:1620:5

IMA Classification of FukuchiliteHide

Classification of FukuchiliteHide

Strunz-mindat (2026):
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 ed.:
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

Mineral SymbolsHide

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

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

Physical Properties of FukuchiliteHide

Lustre:
Sub-Metallic
Transparency:
Opaque
Colour:
Dark brownish gray
Hardness:
6 on Mohs scale
Density:
4.86 g/cm3 (Measured)    4.90 g/cm3 (Calculated)

Chemistry of FukuchiliteHide

Mindat Formula:
Cu3FeS8
Element Weights:
Element% weight
S50.998 %
Cu37.900 %
Fe11.102 %

Calculated from ideal end-member formula.
Elements listed:
Cu, Fe, S - search for minerals with similar chemistry

Crystallography of FukuchiliteHide

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

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0001276FukuchiliteBayliss P (1989) Crystal chemistry and crystallography of some minerals within the pyrite group American Mineralogist 74 1168-117619890293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.789 Å(very strong)
3.21 Å(strong)
1.685 Å(strong)
2.281 Å(medium)
2.497 Å(weak)
1.971 Å(weak)
1.545 Å(weak)
Comments:
Hanawa mine, Japan.

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 3b: Earth’s earliest hydrosphere>4.45
12 : Hadean hydrothermal subsurface sulfide deposits (see also #33)

Type Occurrence of FukuchiliteHide

Type Locality:
ⓘ Hanawa mine, Kazuno City, Akita Prefecture, Japan
Place of Conservation of Type Material:
National Science Museum, Tokyo, Japan, M15937.
National Museum of Natural History, Washington, D.C., USA, 135971.
Associated Minerals at Type Locality:
BaryteCovelliteGypsumPyrite
Reference:
KAJIWARA, YOSHIMICHI (1969) Fukuchilite, Cu3FeS8, a new mineral from the Hanawa mine, Akita Prefecture, Japan. Mineralogical Journal, 5 (6). 399-416 doi:10.2465/minerj1953.5.399

Synonyms of FukuchiliteHide

Other Language Names for FukuchiliteHide

Relationship of Fukuchilite to other SpeciesHide

Member of:
Pyrite Group
Other Members of Pyrite Group:
AurostibiteAuSb2Iso. m3(2/m3) : Pa3
CattieriteCoS2Iso. m3(2/m3) : Pa3
DzharkeniteFeSe2Iso. m3(2/m3) : Pa3
ErlichmaniteOsS2Iso. m3(2/m3) : Pa3
GaotaiiteIr3Te8Iso. m3(2/m3) : Pa3
GeversitePtSb2Iso. m3(2/m3) : Pa3
HaueriteMnS2Iso. m3(2/m3) : Pa3
InsizwaitePtBi2Iso. m3(2/m3) : Pa3
KruťaiteCuSe2Iso. m3(2/m3) : Pa3
LauriteRuS2Iso. m3(2/m3) : Pa3
Penroseite(Ni,Co,Cu)Se2Iso. m3(2/m3) : Pa3
PyriteFeS2Iso. m3(2/m3) : Pa3
SperrylitePtAs2Iso. m3(2/m3) : Pa3
TrogtaliteCoSe2Iso. m3(2/m3) : Pa3
VaesiteNiS2Iso. m3(2/m3) : Pa3
Villamanínite(Cu,Ni,Co,Fe)S2Tric.

Common AssociatesHide

Associations Based on Photo Data:
2 photos of Fukuchilite associated with PyriteFeS2
2 photos of Fukuchilite associated with AlloclasiteCo1-xFexAsS
1 photo of Fukuchilite associated with CovelliteCuS
1 photo of Fukuchilite associated with Tetrahedrite SubgroupCu6(Cu4C2+2)Sb4S12S

Related Minerals - Strunz-mindat GroupingHide

2.EB.SelenolauriteRuSe2Iso. m3(2/m3) : Pa3
2.EB.AndrieslombaarditeRhSbSIso. 23 : P213
2.EB.Iridarsenite(Ir,Ru)As2Mon. 2/m : P21/b
2.EB.Kanatzidisite(SbBiS3)2Te2Mon. 2/m : P21/m
2.EB.05aVaesiteNiS2Iso. m3(2/m3) : Pa3
2.EB.05aHaueriteMnS2Iso. m3(2/m3) : Pa3
2.EB.05aLauriteRuS2Iso. m3(2/m3) : Pa3
2.EB.05aGaotaiiteIr3Te8Iso. m3(2/m3) : Pa3
2.EB.05aPenroseite(Ni,Co,Cu)Se2Iso. m3(2/m3) : Pa3
2.EB.05aVillamanínite(Cu,Ni,Co,Fe)S2Tric.
2.EB.05aErlichmaniteOsS2Iso. m3(2/m3) : Pa3
2.EB.05aSperrylitePtAs2Iso. m3(2/m3) : Pa3
2.EB.05aGeversitePtSb2Iso. m3(2/m3) : Pa3
2.EB.05aCattieriteCoS2Iso. m3(2/m3) : Pa3
2.EB.05aAurostibiteAuSb2Iso. m3(2/m3) : Pa3
2.EB.05aTrogtaliteCoSe2Iso. m3(2/m3) : Pa3
2.EB.05a v'Cayeuxite'
2.EB.05aKruťaiteCuSe2Iso. m3(2/m3) : Pa3
2.EB.05aPyriteFeS2Iso. m3(2/m3) : Pa3
2.EB.05aInsizwaitePtBi2Iso. m3(2/m3) : Pa3
2.EB.05bBambollaiteCu(Se,Te)2Tet.
2.EB.05aDzharkeniteFeSe2Iso. m3(2/m3) : Pa3
2.EB.10aMarcasiteFeS2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.10eParacostibiteCoSbSOrth. mmm(2/m2/m2/m) : Pbca
2.EB.10fOeniteCoSbAsOrth.
2.EB.10ePararammelsbergiteNiAs2Orth. mmm(2/m2/m2/m) : Pbca
2.EB.10aMattagamiteCoTe2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.10aFrohbergiteFeTe2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.10dCostibiteCoSbSOrth. mm2 : Pmn21
2.EB.10bAlloclasiteCo1-xFexAsSMon. 2 : P21
2.EB.10cGlaucodot(Co0.50Fe0.50)AsSOrth. mm2 : Pmn21
2.EB.10aPetříčekiteCuSe2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.10aKulleruditeNiSe2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.10aFerroseliteFeSe2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.15bSeinäjokiteFeSb2Orth.
2.EB.15aRammelsbergiteNiAs2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.15aClinosaffloriteCoAs2Mon. 2/m : P21/m
2.EB.15cPaxiteCuAs2Mon. 2/m : P21/b
2.EB.15aNisbiteNiSb2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.15aLöllingiteFeAs2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.15aSafflorite(Co,Ni,Fe)As2Orth. mmm(2/m2/m2/m) : Pnnm
2.EB.15aOmeiiteOsAs2Orth.
2.EB.15aAnduoiteRuAs2Orth.
2.EB.20ArsenopyriteFeAsSMon. 2/m : P21/b
2.EB.20Ruarsite(Ru,Os)AsSMon.
2.EB.20Osarsite(Os,Ru)AsSMon.
2.EB.20GudmunditeFeSbSMon. 2/m : P21/b
2.EB.25MayingiteIrBiTeIso. m3(2/m3) : Pa3
2.EB.25MaslovitePtBiTeIso. 23 : P213
2.EB.25ParagersdorffiteNi(As,S)2Iso. m3(2/m3) : Pa3
2.EB.25OrthogersdorffiteNiAsSOrth. mm2 : Pca21
2.EB.25SulfopadmaitePdBiSIso. 23 : P213
2.EB.25JolliffeiteNiAsSeIso. m3(2/m3) : Pa3
2.EB.25CobaltiteCoAsSOrth. mm2 : Pca21
2.EB.25GuixiangiteNiBiSIso. 23 : P213
2.EB.25TestibiopalladitePdSbTeIso.
2.EB.25 va'Antimony-bearing Gersdorffite'Ni(As,Sb)S
2.EB.25KalungaitePdAsSeIso. m3(2/m3) : Pa3
2.EB.25Hollingworthite(Rh,Pt,Pd)AsSIso. m3(2/m3) : Pa3
2.EB.25MicheneritePdBiTeIso. 23 : P213
2.EB.25GersdorffiteNiAsSIso. 23 : P213
2.EB.25MilotaitePdSbSeIso. 23 : P213
2.EB.25TolovkiteIrSbSIso.
2.EB.25'Platarsite'Pt(As,S)2Iso. m3(2/m3) : Pa3
2.EB.25WillyamiteCoSbS
2.EB.25ChangchengiteIrBiSIso. 23 : P213
2.EB.25KvačekiteNiSbSeIso. 23 : P213
2.EB.25KrutoviteNiAs2Iso. 23 : P213
2.EB.25PadmaitePdBiSeIso. 432
2.EB.25UllmanniteNiSbSIso. 23 : P213
2.EB.25Irarsite(Ir,Ru,Rh,Pt)AsSIso. m3(2/m3) : Pa3
2.EB.30UrvantsevitePd(Bi,Pb)2Tet. 4/mmm(4/m2/m2/m) : I4/mmm
2.EB.35RheniiteReS2Tric. 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 FukuchiliteHide

References for FukuchiliteHide

Localities for FukuchiliteHide

Showing 13 localities.

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.
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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.
Canada
 
  • Ontario
    • Thunder Bay District
      • Seagull Lake Area
        • Seagull Lake complex
Wilson et al. (2013)
China
 
  • Yunnan
    • Chuxiong
      • Dayao County
Junhua Din et al. (1992)
Cyprus
 
  • Nicosia District
    • Apliki
Antivachis (2015)
France
 
  • Grand Est
    • Haut-Rhin
      • Thann-Guebwiller
        • Kruth
Wittern et al. (1997)
Italy
 
  • Sardinia
    • Sassari Province
      • Ozieri
Ciriotti et al. (2010)
Japan (TL)
 
  • Akita Prefecture
    • Kazuno City
Min.Journ.Japan (1969) +1 other reference
KAJIWARA (1969)
    • Kosaka
Dr. Kinichi Sakurai collection +1 other reference
  • Iwate Prefecture
    • Hachimantai City
      • Tayama
- (n.d.)
Nigeria
 
  • Nasarawa
    • Awe
Baba et al. (2013)
Papua New Guinea
 
  • Bismarck Sea
    • Manus Basin
      • PACMANUS hydrothermal field
Binns et al. (2004)
      • SuSu Knolls hydrothermal field
Yeats et al. (2014)
Spain
 
  • Castile and Leon
    • León
      • Cármenes
        • Villanueva de Pontedo
Martínez i Cantó (2015)
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