Vote for your favorite mineral in #MinCup26! - Erythrite vs. Skutterudite
Pretty pink and poisonous Erythrite is against its shiny silver and structurally-useful Skutterudite.
Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic TimeExplore Fossils
Minerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral QuizTime Machine
Photo SearchPhoto GalleriesSearch by ColorPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Krutovite

A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
02784420017271924387607.jpg
Krutovite, etc.

Zemberg-Terézia vein system, Dobšiná mining district, Dobšiná, Rožňava District, Košice Region, Slovakia
00655130017271924413134.jpg
Krutovite, etc.

Teliatko serpentinite body, Dobšiná, Rožňava District, Košice Region, Slovakia
02725660017271924448573.jpg
Krutovite

Jáchymov, Karlovy Vary District, Karlovy Vary Region, Czech Republic
04570430017864941695514.jpg
Krutovite, etc.

Zemberg-Terézia vein system, Dobšiná mining district, Dobšiná, Rožňava District, Košice Region, Slovakia
00655130017271924413134.jpg
Krutovite, etc.

Teliatko serpentinite body, Dobšiná, Rožňava District, Košice Region, Slovakia
02725660017271924448573.jpg
Krutovite

Jáchymov, Karlovy Vary District, Karlovy Vary Region, Czech Republic
02784420017271924387607.jpg
Krutovite, etc.

Zemberg-Terézia vein system, Dobšiná mining district, Dobšiná, Rožňava District, Košice Region, Slovakia
07095120017271924497923.jpg
Krutovite, etc.

Teliatko serpentinite body, Dobšiná, Rožňava District, Košice Region, Slovakia
Hide all sections | Show all sections

About KrutoviteHide

04593510017271924534791.jpg
Georgy A. Krutov and Oleg V. Kononov
Formula:
NiAs2
Colour:
Greyish-white
Lustre:
Metallic
Hardness:
5½
Specific Gravity:
7.10 (Calculated)
Crystal System:
Isometric
Name:
Named in honor of Georgy Alekseevich Krutov (Георгий Алексеевич Крутов) (24 April 1902, Lytinko, Solnechnogorsk, Moscow, Russian Empire - 11 December 1989, USSR), Professor, Department of Mineralogy, Moscow State University. He specialized in the field of geology, mineralogy, and geochemistry of nickel-cobalt. He was awarded the 1961 A.E. Fersman prize.
Probably a member of the Pyrite Group (Strunz and Nickel, 2001). Synthetic NiAs2 has a pyrite-type structure (Munson, 1968).


Unique IdentifiersHide

Mindat ID:
2280
Long-form identifier:
mindat:1:1:2280:0

IMA Classification of KrutoviteHide

Classification of KrutoviteHide

Strunz-mindat (2026):
2.EB.25

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.:
2.12.1.12

2 : SULFIDES
12 : AmBnXp, with (m+n):p = 1:2

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

Physical Properties of KrutoviteHide

Lustre:
Metallic
Transparency:
Opaque
Colour:
Greyish-white
Hardness:
5½ on Mohs scale
Hardness:
VHN100=719 - Vickers
Density:
7.10(2) g/cm3 (Calculated)

Optical Data of KrutoviteHide

Type:
Isotropic
Reflectivity:
WavelengthR1 (%)R2 (%)
440nm64.0%66.2%
460nm64.7%65.4%
500nm63.8%64.0%
540nm64.7%65.0%
580nm65.7%65.8%
620nm66.2%66.7%
660nm66.3%66.8%
700nm66.2%66.8%
740nm66.2%66.8%
780nm66.0%66.8%
820nm66.0%66.8%
860nm66.3%67.1%
900nm66.6%67.5%
940nm67.2%68.0%
980nm68.0%68.8%
1020nm69.7%70.3%
1060nm71.3%72.1%
1100nm73.4%74.0%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 74.0%.
R1 shown in black, R2 shown in red
Colour in reflected light:
bright white with rose tint, compared to nickel skutterudite

Chemistry of KrutoviteHide

Mindat Formula:
NiAs2
Element Weights:
Element% weight
As71.855 %
Ni28.145 %

Calculated from ideal end-member formula.
Elements listed:
As, Ni - search for minerals with similar chemistry
Common Impurities:
Co,Fe,Cu,Sb,S

Crystallography of KrutoviteHide

Crystal System:
Isometric
Class (H-M):
23 - Tetartoidal
Space Group:
P213
Cell Parameters:
a = 5.79 Å
Unit Cell V:
194.10 ų (Calculated from Unit Cell)
Z:
4

Crystal StructureHide

Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File    Best | x | y | z | a | b | c
Rotation
Stop | Start
Labels
Console Off | On | Grey | Yellow
IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0012675KrutoviteMunson R A (1968) The synthesis of iridium disulfide and nickel diarsenide having the pyrite structure Inorganic Chemistry 7 389-3901968synthetic0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.593 Å(10)
2.365 Å(8)
1.746 Å(8)
2.897 Å(6)
1.548 Å(6)
1.0242 Å(6)
2.051 Å(5)

Geological EnvironmentHide

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

Type Occurrence of KrutoviteHide

Type Locality:
ⓘ Potůčky Deposit, Potůčky, Karlovy Vary District, Karlovy Vary Region, Czech Republic
General Appearance of Type Material:
grains intergrown with ore
Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, Academy of Science, Moscow, Russia.
Mining Institute, St. Petersburg, Russia.
National Museum, Prague, Czech Republic, 61625.
Associated Minerals at Type Locality:
NickelskutteruditeTennantite Subgroup
Reference:
Vinogradova, R.A., N.S. Rudashevskii, I.A. Bud’ko, L.I. Bochek, P. Kaspar, K. Padera (1976) Krutovite – a new cubic nickel diarsenide. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 105(1): 59–71 (in Russian).

Synonyms of KrutoviteHide

Other Language Names for KrutoviteHide

Dutch:Krutoviet
German:Krutovit
Spanish:Krutovita

Common AssociatesHide

Associations Based on Photo Data:
5 photos of Krutovite associated with StephaniteAg5SbS4
2 photos of Krutovite associated with AnnabergiteNi3(AsO4)2 · 8H2O
2 photos of Krutovite associated with DickiteAl2(Si2O5)(OH)4
2 photos of Krutovite associated with ProustiteAg3AsS3
2 photos of Krutovite associated with QuartzSiO2
2 photos of Krutovite associated with SymplesiteFe2+3(AsO4)2 · 8H2O
2 photos of Krutovite associated with ParasymplesiteFe2+3(AsO4)2 · 8H2O
2 photos of Krutovite associated with JarositeKFe3+3(SO4)2(OH)6
1 photo of Krutovite associated with CalciteCaCO3
1 photo of Krutovite associated with Tennantite SubgroupCu6(Cu4C2+2)As4S12S

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.05aFukuchiliteCu3FeS8Iso. 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.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 KrutoviteHide

References for KrutoviteHide

Reference List:
Munson, R.A. (1968) The synthesis of iridium disulfide and nickel diarsenide having the pyrite structure. Inorganic Chemistry: 7: 389-390.
Holseth, Hans, Kjekshus, Arne, Andresen, A. F., Pearson, W. B. (1968) Compounds with the Marcasite Type Crystal Structure. I. Compositions of the Binary Pnictides. Acta Chemica Scandinavica, 22. 3273-3283 doi:10.3891/acta.chem.scand.22-3273
Vinogradova, R.A., Rudashevskii, N.S., Bud’ko, I.A., Bochek, L.I., Kaspar, P., and Padera, K. (1976) Krutovite – a new cubic nickel diarsenide. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 105(1): 59–71 (in Russian).
Vinogradova, R.A., Rudashevskii, N.S., Bochek, L.I., and Bud’ko, I.A. (1976) First discovery of krutovite in the USSR. Doklady Acad. Nauk SSSR: 230: 938–941 (in Russian).
Vinogradova, R.A., N.S. Rudashevskii, I.A. Bud’ko, L.I. Bochek, P. Kaspar, K. Padera (1976) Krutovite – a new cubic nickel diarsenide. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 105(1): 59–71 (in Russian).
Fleischer, M., Mandarino, A. (1977) New mineral names. American Mineralogist, 62 (1-2). 173-176
Spiridonov, E.M. and Chvileva, T.N. (1995) The boundary between gersdorffite NiAsS and krutovite NiAs2. Doklady Akad. Nauk: 341(6): 785–787 (English translation in Trans. Russ. Acad. Sci., Earth Sci. Sect.: 344(7): 119–123).
Jambor, John L., Roberts, Andrew C. (1998) New mineral names. American Mineralogist, 83 (3-4) 400-403
Strunz, Hugo, Nickel, Ernest H. (2001) Strunz Mineralogical Tables (9th ed.) Schweizerbart.
Ondruš, P., Veselovský, F., Gabašová, A., Hloušek, J., Šrein, V., Vavřín, I., Skála, R., Sejkora, J., Drábek, M. (2003) Primary minerals of the Jáchymov ore district. Journal of the Czech Geological Society, 48 (3-4) 19-147
Hem, S. R., Makovicky, E. (2004) The System Fe-Co-Ni-As-S. II. Phase Relations in the (Fe,Co,Ni)As1.5S0.5 Section at 650° and 500°C. The Canadian Mineralogist, 42 (1). 63-86 doi:10.2113/gscanmin.42.1.63
(2005) Krutovite. Handbook of Mineralogy. Mineralogical Society of America

Localities for KrutoviteHide

Showing 24 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.
Hide all sections | Show all sections

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.
Brazil
 
  • Bahia
    • Maracás
      • Rio Jacaré layered complex
Campbell (2012)
Czech Republic
 
  • Karlovy Vary Region
    • Karlovy Vary District
Hloušek et al. (2002)
86. +1 other reference
      • Potůčky
Nickel & Nichols +1 other reference
Germany
 
  • Hesse
    • Darmstadt
      • Darmstadt-Dieburg
        • Mühltal
          • Nieder-Ramstadt
PETITJEAN collection
Poland
 
  • Lower Silesian Voivodeship
    • Jawor County
      • Gmina Męcinka
        • Chełmiec
Muszyński et al. (2023)
Muszyński et al. (2023)
Romania
 
  • Bihor County
    • Nucet
Săbău et al. (2023)
Russia
 
  • Adygea (Republic of Adygea)
    • Maykopsky District
Pavel M. Kartashov (n.d.) +1 other reference
  • Orenburg Oblast
    • Gaysky District
Zaikov et al. (2006)
  • Tuva
    • Chedi-Kholsky District
Anthony et al. (1990)
    • Ovyursky District
Sejkora et al. (2021)
Serbia
 
  • Central Serbia
    • Raška District
      • Novi Pazar
Budinov et al. (2015)
Slovakia
 
  • Banská Bystrica Region
    • Banská Bystrica District
      • Ľubietová
Majzlan J. et al. (2022) +1 other reference
  • Košice Region
    • Rožňava District
Chovan M. & Ozdín D. et al. (Slovakia)
Kiefer et al. (2020)
Martin Števko-unpublished
Števko M. et al. (Slovenská republika)
  • Trenčín Region
    • Bánovce nad Bebravou District
      • Čierna Lehota
Majzlan et al. (2022)
  • Žilina Region
    • Liptovský Mikuláš District
Ozdín et al. (1999)
Ozdín et al. (1999)
Spain
 
  • Aragon
    • Huesca
      • San Juan de Plan
Fanlo et al. (2004)
Switzerland
 
  • Valais
    • Leuk
      • Turtmann-Unterems
        • Turtmann Valley
          • Pipjitälli
Ansermet et al. (2021)
    • Sierre
      • Anniviers
        • Ayer
Ansermet (2012)
Quick NavTopAbout KrutoviteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
 
and/or  
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 2, 2026 00:35:09 Page updated: August 19, 2026 05:19:18
Go to top of page