Mooihoekite
A valid IMA mineral species
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About Mooihoekite
Formula:
Cu9Fe9S16
Colour:
Yellow
Lustre:
Metallic, Sub-Metallic
Hardness:
4
Specific Gravity:
4.36
Crystal System:
Tetragonal
Member of:
Name:
Named for the type locality of Mooihoek Farm, South Africa. Pronounced moi-hūk-ait.
This page provides mineralogical data about Mooihoekite.
Unique Identifiers
Mindat ID:
2772
Long-form identifier:
mindat:1:1:2772:0
Similar Names
| Maohokite | A valid IMA mineral species | MgFe2O4 |
IMA Classification of Mooihoekite
Approved
Approval year:
1971
First published:
1972
Classification of Mooihoekite
2.CB.10b
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
B : With Zn, Fe, Cu, Ag, etc.
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
B : With Zn, Fe, Cu, Ag, etc.
2.9.8.3
2 : SULFIDES
9 : AmBnXp, with (m+n):p = 1:1
2 : SULFIDES
9 : AmBnXp, with (m+n):p = 1:1
3.1.26
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
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 Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Mho | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Mooihoekite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Mooihoekite
Metallic, Sub-Metallic
Transparency:
Opaque
Colour:
Yellow
Hardness:
4 on Mohs scale
Hardness:
VHN100=240 - 246 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Density:
4.36 g/cm3 (Measured) 4.37 g/cm3 (Calculated)
Comment:
On synthetic material
Optical Data of Mooihoekite
Anisotropism:
Weak
Reflectivity:
| Wavelength | R1 (%) |
|---|---|
| 400nm | 14.3% |
| 420nm | 16.7% |
| 440nm | 20.0% |
| 460nm | 23.9% |
| 480nm | 27.5% |
| 500nm | 30.6% |
| 520nm | 33.2% |
| 540nm | 35.2% |
| 560nm | 36.7% |
| 580nm | 37.8% |
| 600nm | 38.8% |
| 620nm | 39.4% |
| 640nm | 40.0% |
| 660nm | 40.2% |
| 680nm | 40.3% |
| 700nm | 40.4% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 40.4%.
Colour in reflected light:
Similar to chalcopyrite, tranishes to pinkish brown to a heavy purplish
Chemistry of Mooihoekite
Mindat Formula:
Cu9Fe9S16
Element Weights:
Elements listed:
Common Impurities:
Ni
Crystallography of Mooihoekite
Crystal System:
Tetragonal
Class (H-M):
42m - Scalenohedral
Space Group:
P42m
Cell Parameters:
a = 10.585(5) Å, c = 5.383(5) Å
Ratio:
a:c = 1 : 0.509
Unit Cell V:
603.12 ų (Calculated from Unit Cell)
Z:
1
Morphology:
Not yet found in crystals
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0009489 | Mooihoekite | Hall S R, Rowland J F (1973) The crystal structure of synthetic mooihoekite, Cu9Fe9S16 Acta Crystallographica B29 2365-2372 | ![]() | 1973 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.49 Å | (20) |
| 3.77 Å | (30) |
| 3.07 Å | (100) |
| 2.84 Å | (20) |
| 2.64 Å | (30) |
| 2.16 Å | (20) |
| 1.889 Å | (80) |
| 1.871 Å | (40) |
| 1.615 Å | (30) |
| 1.597 Å | (60) |
| 1.323 Å | (40) |
| 1.223 Å | (50) |
| 1.214 Å | (20) |
| 1.091 Å | (30) |
| 1.083 Å | (60) |
| 1.025 Å | (20) |
| 1.018 Å | (40) |
| 0.943 Å | (30) |
| 0.935 Å | (30) |
Comments:
ICDD 25-286
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 3b: Earth’s earliest hydrosphere | >4.45 |
| 15 : Black/white smoker minerals and other seafloor hydrothermal minerals | |
| High-? alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) | |
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 37 : Layered igneous intrusions and related PGE minerals |
Type Occurrence of Mooihoekite
Place of Conservation of Type Material:
Princeton University, Princeton, New Jersey; National Museum of Natural History, Washington, D.C., USA, 124965; Canadian Museum of Nature, Ottawa, 10309; Royal Ontario Museum, Toronto, Canada, M30992; Heidelberg University, Heidelberg, Germany, 2313a
Associated Minerals at Type Locality:
Synonyms of Mooihoekite
Other Language Names for Mooihoekite
Relationship of Mooihoekite to other Species
Member of:
Other Members of Talnakhite Group:
| Haycockite | Cu4Fe5S8 | Orth. 222 |
| Putoranite | Cu1.1Fe1.2S2 | Iso. m3m(4/m32/m) : Pn3m |
| Talnakhite | Cu9(Fe,Ni)8S16 | Iso. 43m : I43m |
Common Associates
Associations Based on Photo Data:
| 30 photos of Mooihoekite associated with Cubanite | CuFe2S3 |
| 17 photos of Mooihoekite associated with Talnakhite | Cu9(Fe,Ni)8S16 |
| 17 photos of Mooihoekite associated with Ferrovalleriite | 2(Fe,Cu)S · 1.5Fe(OH)2 |
| 14 photos of Mooihoekite associated with Magnetite | Fe2+Fe3+2O4 |
| 8 photos of Mooihoekite associated with Altaite | PbTe |
| 7 photos of Mooihoekite associated with Chalcopyrite | CuFeS2 |
| 7 photos of Mooihoekite associated with Native Silver | Ag |
| 6 photos of Mooihoekite associated with Cabriite | Pd2CuSn |
| 6 photos of Mooihoekite associated with Pentlandite | (NixFey)Σ9S8 |
| 6 photos of Mooihoekite associated with Calcite | CaCO3 |
Related Minerals - Strunz-mindat Grouping
| 2.CB. | Richardsite | Zn2CuGaS4 |
| 2.CB. | Okruginite | Cu2SnSe3 |
| 2.CB. | Hanswilkeite | KFeS2 |
| 2.CB. | Auroselenide | AuSe |
| 2.CB. | Ruizhongite | (Ag2◻)Pb3Ge2S8 |
| 2.CB. | Agmantinite | Ag2MnSnS4 |
| 2.CB. | Tolstykhite | Au3S4Te6 |
| 2.CB. | Gachingite | Au(Te1-xSex) |
| 2.CB.05a | Hawleyite | CdS |
| 2.CB.05 | 'UM1998-15-S:CuFeZn' | Cu2Fe3Zn5S10 |
| 2.CB.05a | Coloradoite | HgTe |
| 2.CB.05a | Metacinnabar | HgS |
| 2.CB.05a | Tiemannite | HgSe |
| 2.CB.05a | Sphalerite | ZnS |
| 2.CB.05b | Sakuraiite | (Cu,Zn,Fe)3(In,Sn)S4 |
| 2.CB.05c | Polhemusite | (Zn,Hg)S |
| 2.CB.05a | Rudashevskyite | (Fe,Zn)S |
| 2.CB.05a | Stilleite | ZnSe |
| 2.CB.05a | Ishiharaite | (Cu,Ga,Fe,In,Zn)S |
| 2.CB.07a | 'Unnamed (Cu-Mn-Sn Sulphide)' | Cu2MnSnS4 |
| 2.CB.07a | Shenzhuangite | NiFeS2 |
| 2.CB.10b | Talnakhite | Cu9(Fe,Ni)8S16 |
| 2.CB.10b | Haycockite | Cu4Fe5S8 |
| 2.CB.10a | Lenaite | AgFeS2 |
| 2.CB.10a | Gallite | CuGaS2 |
| 2.CB.10a | Roquesite | CuInS2 |
| 2.CB.10a | Eskebornite | CuFeSe2 |
| 2.CB.10a | 'UM1984-30-S:CuFeSn' | Cu2Fe2Sn3S7 |
| 2.CB.10c | Omariniite | Cu8Fe2ZnGe2S12 |
| 2.CB.10a | Chalcopyrite | CuFeS2 |
| 2.CB.10a | 'Unnamed (Cu-Zn-In Sulphide)' | CuZn2InS4 |
| 2.CB.10a | Laforêtite | AgInS2 |
| 2.CB.10b | Putoranite | Cu1.1Fe1.2S2 |
| 2.CB.15a | Velikite | Cu2HgSnS4 |
| 2.CB.15c | 'UM2006-11-S:CuFeGeZn' | Cu8(Fe,Zn)3Ge2S12 (?) |
| 2.CB.15a | Hocartite | Ag2(Fe2+,Zn)SnS4 |
| 2.CB.15a | Kësterite | Cu2ZnSnS4 |
| 2.CB.15a | Pirquitasite | Ag2ZnSnS4 |
| 2.CB.15a | Stannite | Cu2FeSnS4 |
| 2.CB.15c | Stannoidite | Cu+6Cu2+2(Fe2+,Zn)3Sn2S12 |
| 2.CB.15b | Mohite | Cu2SnS3 |
| 2.CB.15a | Černýite | Cu2CdSnS4 |
| 2.CB.15a | Idaite | Cu5FeS6 |
| 2.CB.15a | Ferrokësterite | Cu2FeSnS4 |
| 2.CB.15a | Kuramite | Cu3SnS4 |
| 2.CB.17a v | 'Arsenic-bearing Renierite' | Cu11GeAsFe4S16 |
| 2.CB.20 | Mawsonite | Cu6Fe2SnS8 |
| 2.CB.20 | Chatkalite | Cu6FeSn2S8 |
| 2.CB.30 | 'Frieseite' | Ag2Fe5S8 (?) |
| 2.CB.30 | Nekrasovite | Cu26V2(Sn,As,Sb)6S32 |
| 2.CB.30 | 'Argyropyrite' | near Ag2Fe7S11 |
| 2.CB.30 | Maikainite | Cu20(Fe,Cu)6Mo2Ge6S32 |
| 2.CB.30 | Colusite | Cu13VAs3S16 |
| 2.CB.30 | Germanite | Cu13Fe2Ge2S16 |
| 2.CB.30 | Germanocolusite | Cu26V2(Ge,As)6S32 |
| 2.CB.30 | Stibiocolusite | Cu13V(Sb,Sn,As)3S16 |
| 2.CB.30 | Ovamboite | Cu20(Fe,Cu,Zn)6W2Ge6S32 |
| 2.CB.35a | Morozeviczite | (Pb,Fe)3Ge1-xS4 |
| 2.CB.35a | Renierite | (Cu+,Zn)11Fe4(Ge4+,As5+)2S16 |
| 2.CB.35a | Hemusite | Cu6SnMoS8 |
| 2.CB.35b | Catamarcaite | Cu6GeWS8 |
| 2.CB.35a | Vinciennite | Cu+7Cu2+3Fe2+2Fe3+2Sn(As,Sb)S16 |
| 2.CB.35a | Kiddcreekite | Cu6SnWS8 |
| 2.CB.35a | Polkovicite | (Fe,Pb)3(Ge,Fe)1-xS4 |
| 2.CB.40 | Lautite | CuAsS |
| 2.CB.42 | Lingbaoite | AgTe3 |
| 2.CB.45 | Cadmoselite | CdSe |
| 2.CB.45 | Rambergite | MnS |
| 2.CB.45 | Buseckite | (Fe,Zn,Mn)S |
| 2.CB.45 | Maletoyvayamite | Au3Se4Te6 |
| 2.CB.45 | Greenockite | CdS |
| 2.CB.45 | Wurtzite | (Zn,Fe)S |
| 2.CB.47 | Murchisite | Cr5S6 |
| 2.CB.50 | 'Zincselenide' | ZnSe |
| 2.CB.50 | Wassonite | TiS |
| 2.CB.52 | 'Dzhezkazganite' | ReMoCu2PbS6 ? |
| 2.CB.55b | Isocubanite | CuFe2S3 |
| 2.CB.55a | Cubanite | CuFe2S3 |
| 2.CB.60 | Raguinite | TlFeS2 |
| 2.CB.60 | Picotpaulite | TlFe2S3 |
| 2.CB.65 | Argentopyrite | AgFe2S3 |
| 2.CB.65 | Sternbergite | AgFe2S3 |
| 2.CB.70 | Sulvanite | Cu3VS4 |
| 2.CB.75 | Vulcanite | CuTe |
| 2.CB.80 | Empressite | AgTe |
| 2.CB.85 | Muthmannite | AuAgTe2 |
Other Information
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 Mooihoekite
mindat.org URL:
https://www.mindat.org/min-2772.html
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References for Mooihoekite
Reference List:
Cabri, Louis J., Hall, Sydney R. (1972) Mooihoekite and haycockite, two new copper-iron sulfides, and their relationship to chalcopyrite and talnakhite. American Mineralogist, 57 (5-6) 689-708
Cabri, Louis J., Hall, Sydney R. (1972) Mooihoekite and haycockite, two new copper-iron sulfides, and their relationship to chalcopyrite and talnakhite. American Mineralogist, 57 (5-6) 689-708
Hall, S. R., Rowland, J. F. (1973) The crystal structure of synthetic mooihoekite Cu9Fe9S16. Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry, 29 (11) 2365-2372 doi:10.1107/s0567740873006710
Hall, S. R. (1975) Crystal structures of the chalcopyrite series. The Canadian Mineralogist, 13 (2) 168-172
Localities for Mooihoekite
Showing 30 localities.
Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Atlantic Ocean | |
| Bonatti et al. (1976) |
Bulgaria | |
| Mladenova et al. (2017) |
China | |
| Xianchang Luo (1983) |
Cyprus | |
| Antivachis (2015) |
Greece | |
| |
| Möckel (2001) |
India | |
| Panigrahi et al. (1997) |
Italy | |
| Adorni F. (1997) |
Japan | |
| Kitakaze (2010) |
Poland | |
| Piestrzyński et al. (2012) |
| Kucha H. 2007: Mineralogia kruszcowa i ... |
| Nejbert (2008) |
| Kucha (1982) | |
Russia | |
| Spiridonov et al. (2015) |
| Pekov (1998) |
| Yevstigneyeva et al. (1973) +5 other references | |
| 2014 Ultramafic-mafic intrusions +1 other reference | |
| Gerald K. Czamanske et al. (1992) | |
| Shvedov et al. (2015) |
| Orsoev et al. (1985) |
| Grokhovskaya et al. (2005) |
South Africa | |
| Cairncross et al. (1995) |
| Amer.Min. (1972) |
| Oberthür et al. (2021) |
| Kinloch et al. (1990) +1 other reference |
USA | |
| Anthony et al. (1990) |
| Good et al. (2010) |
| JF Carpentier specimen |
| |
| John Lindell Collection |
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Stillwater Mine, Stillwater County, Montana, USA