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Fletcherite

A valid IMA mineral species
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02210800014947855056307.jpg
Fletcherite, etc.

Fletcher Mine, West Fork, Reynolds County, Missouri, USA
07051660014961115671556.jpg
Fletcherite, etc.

Bernburg, Staßfurt Potash Deposit, Saxony-Anhalt, Germany
06856070014949508391415.jpg
Fletcherite

San José claim, Chóvar, Castellón, Valencian Community, Spain
02210800014947855056307.jpg
Fletcherite, etc.

Fletcher Mine, West Fork, Reynolds County, Missouri, USA
02325670014967028166033.jpg
Fletcherite, etc.

Bernburg, Staßfurt Potash Deposit, Saxony-Anhalt, Germany
06856070014949508391415.jpg
Fletcherite

San José claim, Chóvar, Castellón, Valencian Community, Spain
02210800014947855056307.jpg
Fletcherite, etc.

Fletcher Mine, West Fork, Reynolds County, Missouri, USA
07051660014961115671556.jpg
Fletcherite, etc.

Bernburg, Staßfurt Potash Deposit, Saxony-Anhalt, Germany
Hide all sections | Show all sections

About FletcheriteHide

Formula:
CuNi2S4
Often contains Co substituting for Ni.
Colour:
Steel gray
Lustre:
Metallic
Hardness:
5
Specific Gravity:
4.76 (Calculated)
Crystal System:
Isometric
Name:
Named for the type locality, the Fletcher Mine, Reynolds Co., Missouri, USA.
See also Unnamed (Fe3+-analogue of Fletcherite).


Unique IdentifiersHide

Mindat ID:
1557
Long-form identifier:
mindat:1:1:1557:4
GUID
(UUID V4):
9841b17a-415a-4ab3-a43b-59f705a89a7f

IMA Classification of FletcheriteHide

Classification of FletcheriteHide

Strunz-mindat (2024):
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 ed.:
2.10.1.3

2 : SULFIDES
10 : AmBnXp, with (m+n):p = 3:4
Hey's CIM Ref.:
3.11.12

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

Mineral SymbolsHide

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

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

Physical Properties of FletcheriteHide

Lustre:
Metallic
Transparency:
Opaque
Colour:
Steel gray
Hardness:
5 on Mohs scale
Hardness:
VHN25=446 - 464 kg/mm2 - Vickers
Density:
4.76 g/cm3 (Calculated)

Optical Data of FletcheriteHide

Reflectivity:
WavelengthR
420nm36.4%
460nm40.9%
500nm42.5%
546nm43.4%
589nm45.3%
640nm43.8%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 45.3%.
Colour in reflected light:
Creamy white

Chemistry of FletcheriteHide

Mindat Formula:
CuNi2S4

Often contains Co substituting for Ni.
Elements listed:
Cu, Ni, S - search for minerals with similar chemistry
Common Impurities:
Co,Fe

Crystallography of FletcheriteHide

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Fd3m
Cell Parameters:
a = 9.520 Å
Unit Cell V:
862.80 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Minute crystals to 200 microns.
Comment:
Space group assumed by comparison to related thiospinels.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
1.68 Å(vs)
1.83 Å(s)
2.87 Å(m)
2.39 Å(m)
1.37 Å(m)
1.24 Å(m)
1.19 Å(m)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
High-𝑇 alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])

Type Occurrence of FletcheriteHide

Type Locality:
ⓘ Fletcher Mine, West Fork, Reynolds County, Missouri, USA
General Appearance of Type Material:
Anhedral crystals, up to 200 µm, disseminated in copper sulfides.
Place of Conservation of Type Material:
1) The Natural History Museum, London, England.
2) Royal Ontario Museum, Toronto, Canada, M35070.
3) National Museum of Natural History (Smithsonian), Washington, D.C., USA, 137072.
Geological Setting of Type Material:
Disseminated in copper minerals
Associated Minerals at Type Locality:
VaesitePyriteDigeniteCovelliteChalcopyrite
Bornite
Reference:
Craig, J.R, Carpenter, A.B. (1977) Fletcherite,Cu(Ni,Co)2S4, a new thiospinel from the Viburnum Trend (new lead belt), Missouri. Economic Geology: 72: 480-486.

Synonyms of FletcheriteHide

Other Language Names for FletcheriteHide

Relationship of Fletcherite to other SpeciesHide

Member of:
Carrollite Subgroup > Thiospinel Group > Spinel Supergroup
Other Members of this group:
CarrolliteCuCo2S4Iso. m3m (4/m 3 2/m) : Fd3m
Cuproiridsite(Cu,Fe)Ir2S4Iso. m3m (4/m 3 2/m) : Fd3m
CuprokalininiteCuCr2S4Iso. m3m (4/m 3 2/m) : Fd3m
EzochiiteCu+(Rh3+Pt4+)S4Iso. m3m (4/m 3 2/m) : Fd3m
Florensovite(Cu,Zn)Cr1.5Sb0.5S4Iso. m3m (4/m 3 2/m)
MalaniteCu1+(Ir3+Pt4+)S4Iso. m3m (4/m 3 2/m)
RhodostanniteCu1+(Fe2+0.5Sn4+1.5)S4Tet. 4/m : I41/a
ToyohaiteAg1+(Fe2+0.5Sn4+1.5)S4Tet. 4/m : I41/a
Unnamed (Fe3+-analogue of Fletcherite)Cu(Fe3+,Ni,Co)2S4

Common AssociatesHide

Associated Minerals Based on Photo Data:
4 photos of Fletcherite associated with AnhydriteCaSO4
1 photo of Fletcherite associated with BorniteCu5FeS4
1 photo of Fletcherite associated with ChalcopyriteCuFeS2
1 photo of Fletcherite associated with PyriteFeS2

Related Minerals - Strunz-mindat GroupingHide

2.DA.ZaykoviteRh3Se4Mon. 2/m : B2/m
2.DA.GrimmiteNiCo2S4Iso. m3m (4/m 3 2/m) : Fd3m
2.DA.ZolenskyiteFeCr2S4Mon. 2/m : B2/m
2.DA.EzochiiteCu+(Rh3+Pt4+)S4Iso. m3m (4/m 3 2/m) : Fd3m
2.DA.FerrodimolybdeniteFeMo2S4Mon. 2/m : B2/b
2.DA.05BornhardtiteCo2+Co3+2Se4Iso. m3m (4/m 3 2/m) : Fd3m
2.DA.05CarrolliteCuCo2S4Iso. m3m (4/m 3 2/m) : Fd3m
2.DA.05Cuproiridsite(Cu,Fe)Ir2S4Iso. m3m (4/m 3 2/m) : Fd3m
2.DA.05Cuprorhodsite(Cu1+0.5Fe3+0.5)Rh3+2S4Iso. m3m (4/m 3 2/m) : Fd3m
2.DA.05DaubréeliteFe2+Cr3+2S4Iso. m3m (4/m 3 2/m) : Fd3m
2.DA.05Florensovite(Cu,Zn)Cr1.5Sb0.5S4Iso. m3m (4/m 3 2/m)
2.DA.05GreigiteFe2+Fe3+2S4Iso. m3m (4/m 3 2/m) : Fd3m
2.DA.05InditeFeIn2S4Iso. m3m (4/m 3 2/m) : Fd3m
2.DA.05KalininiteZnCr2S4Iso. m3m (4/m 3 2/m) : Fd3m
2.DA.05LinnaeiteCo2+Co3+2S4Iso. m3m (4/m 3 2/m) : Fd3m
2.DA.05MalaniteCu1+(Ir3+Pt4+)S4Iso. m3m (4/m 3 2/m)
2.DA.05PolydymiteNi2+Ni3+2S4Iso. m3m (4/m 3 2/m) : Fd3m
2.DA.05SiegeniteCoNi2S4Iso. m3m (4/m 3 2/m) : Fd3m
2.DA.05TrüstedtiteNi3Se4Iso.
2.DA.05TyrrelliteCu(Co3+,Ni3+)2Se4Iso. m3m (4/m 3 2/m) : Fd3m
2.DA.05ViolariteFe2+Ni3+2S4Iso. m3m (4/m 3 2/m) : Fd3m
2.DA.05XingzhongitePb2+Ir3+2S4Iso.
2.DA.05CadmoinditeCdIn2S4Iso. m3m (4/m 3 2/m) : Fd3m
2.DA.05CuprokalininiteCuCr2S4Iso. m3m (4/m 3 2/m) : Fd3m
2.DA.05JoegoldsteiniteMnCr2S4Iso. m3m (4/m 3 2/m) : Fd3m
2.DA.05NickeltyrrelliteCuNi2Se4Iso. m3m (4/m 3 2/m) : Fd3m
2.DA.10RhodostanniteCu1+(Fe2+0.5Sn4+1.5)S4Tet. 4/m : I41/a
2.DA.10ToyohaiteAg1+(Fe2+0.5Sn4+1.5)S4Tet. 4/m : I41/a
2.DA.15BrezinaiteCr3S4Mon. 2/m
2.DA.15Heideite(Fe,Cr)1.15(Ti,Fe)2S4Mon. 2/m
2.DA.20InaglyiteCu3Pb(Ir,Pt)8S16Hex.
2.DA.20KonderiteCu3Pb(Rh,Pt,Ir)8S16Hex. 6/m : P6/m
2.DA.25Kingstonite(Rh,Ir,Pt)3S4Mon. 2/m : B2/m

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 FletcheriteHide

References for FletcheriteHide

Localities for FletcheriteHide

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.
Austria
 
  • Lower Austria
    • Sankt Pölten-Land District
      • Karlstetten
        • Rosenthal
Kolitsch et al. (2023)
Brazil
 
  • Bahia
    • Maracás
      • Rio Jacaré layered complex
Campbell (2012)
  • Pará
    • Curionópolis
Berni et al. (2014)
Canada
 
  • Ontario
    • Cochrane District
      • Timmins
        • Kidd Township
Hannington et al. (1999)
Czech Republic
 
  • Karlovy Vary Region
Ondruš et al. (2003)
DR Congo
 
  • Haut-Katanga
    • Kambove Territory
      • Shinkolobwe
Gauthier
Finland
 
  • Lapland
    • Ranua
Mutanen
France
 
  • Auvergne-Rhône-Alpes
    • Ain
      • Bourg-en-Bresse
        • Jayat
Ducluzaux (2022)
Germany
 
  • Saxony-Anhalt
    • Bernburg
Driesner et al. (1993) +1 other reference
    • Staßfurt Potash Deposit
L. Kruszewski specimen
Namibia
 
  • Kunene Region
    • Epupa
Drüppel et al. (2006)
Drüppel +2 other references
Poland
 
  • Świętokrzyskie Voivodeship
    • Kielce County
      • Gmina Chęciny
        • Miedzianka
Lenik et al. (2019)
Portugal
 
  • Aveiro
    • Albergaria-a-Velha
      • Branca
Marques de Sá et al. (2010)
Russia
 
  • Khabarovsk Krai
    • Ayan-Maya district
      • Konder alkaline-ultrabasic massif
Barkov et al. (2016) +1 other reference
  • Zabaykalsky Krai
    • Gazimuro-Zavodsky District
Kovalev et al. (2019)
Spain
 
  • Valencian Community
    • Castellón
      • Chóvar
Casanova Honrubia
USA
 
  • Missouri
    • Reynolds County
      • Ellington
Rocks & Min.: 64:22&26.
      • West Fork
Economic Geology
Leach et al. (1995)
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