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Kvačekite

A valid IMA mineral species
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Formula:
NiSbSe
Colour:
grey
Lustre:
Metallic
Hardness:
5 - 6
Specific Gravity:
7.607 (Calculated)
Crystal System:
Isometric
Name:
Named after Milan Kvaček (13. 2. 1930 - 21. 5. 1993), a Czech mineralogist and the author of the first comprehensive descriptions of selenides from western Moravia. Milan Kvaček is the author of over sixty publications in the fields of mineralogy, chemistry and geochemistry. He also co-operated closely with Zdeněk Johan from BRGM (Orléans) on the description of six new selenides from the Bohemian Massif - bukovite, fischesserite, hakite, permingeatite, petrovicite and sabatierite.
The Se analogue of ullmannite. Unique combination of elements (at the upload time).


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Unique IdentifiersHide

Mindat ID:
470991
Long-form identifier:
mindat:1:1:470991:2

IMA Classification of KvačekiteHide

Classification of KvačekiteHide

Strunz-mindat (2025):
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.

Mineral SymbolsHide

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

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

Physical Properties of KvačekiteHide

Lustre:
Metallic
Transparency:
Opaque
Colour:
Grey
Streak:
Grey
Hardness:
5 - 6 on Mohs scale
Comment:
in agreement with other members of the cobaltite group
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Conchoidal
Density:
7.607 g/cm3 (Calculated)

Optical Data of KvačekiteHide

Bireflectance:
none
Reflectivity:
WavelengthR1 (%)
470nm54.9%
546nm53.5%
589nm52.6%
650nm52.2%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 54.9%.
Colour in reflected light:
white with a faint yellowish shade
Pleochroism:
Non-pleochroic

Chemistry of KvačekiteHide

Mindat Formula:
NiSbSe
Element Weights:
Element% weight
Sb46.937 %
Se30.438 %
Ni22.625 %

Calculated from ideal end-member formula.
Elements listed:
Ni, Sb, Se - search for minerals with similar chemistry

Crystallography of KvačekiteHide

Crystal System:
Isometric
Class (H-M):
2 3 - Tetartoidal
Space Group:
P21 3
Cell Parameters:
a = 6.0901(1) Å
Unit Cell V:
225.88 ų (Calculated from Unit Cell)
Z:
4

X-Ray Powder DiffractionHide

Type Occurrence of KvačekiteHide

Type Locality:
ⓘ Bukov Mine, Rožná deposit, Rožná, Žďár nad Sázavou District, Vysočina Region, Czech Republic
General Appearance of Type Material:
anhedral grains, up to 15 μm in size
Place of Conservation of Type Material:
in the collections of the Department of Mineralogy and Petrology, National Museum, Cirkusová 1740, 19300 Praha 9, Czech Republic, catalogue number P1P 26/2023
Geological Setting of Type Material:
This uranium ore district is an example of shear zone-hosted, late Variscan and post-Variscan hydrothermal mineralisation.
Associated Minerals at Type Locality:
NickeltyrrelliteTyrrelliteBerzelianiteHakite-(Zn)Hakite-(Cd)
EucairiteClausthaliteNative GoldCalcite
Reference:
Pauliš, Petr, Dolníček, Zdeněk, Sejkora, Jiří, Pour, Ondřej, Laufek, František, Ulmanová, Jana, Vymazalová, Anna (2024) Kvačekite, NiSbSe, a new selenide mineral from Bukov, Czech Republic. Mineralogical Magazine, 88 (5). 565-575 doi:10.1180/mgm.2024.32

Other Language Names for KvačekiteHide

German:Kvačekit

Related Minerals - Strunz-mindat GroupingHide

2.EB.SelenolauriteRuSe2Iso. m3 (2/m 3) : Pa3
2.EB.AndrieslombaarditeRhSbSIso. 2 3 : P21 3
2.EB.Iridarsenite(Ir,Ru)As2Mon. 2/m : P21/b
2.EB.Kanatzidisite(SbBiS3)2Te2Mon. 2/m : P21/m
2.EB.05aVaesiteNiS2Iso. m3 (2/m 3) : Pa3
2.EB.05aHaueriteMnS2Iso. m3 (2/m 3) : Pa3
2.EB.05aLauriteRuS2Iso. m3 (2/m 3) : Pa3
2.EB.05aGaotaiiteIr3Te8Iso. m3 (2/m 3) : Pa3
2.EB.05aPenroseite(Ni,Co,Cu)Se2Iso. m3 (2/m 3) : Pa3
2.EB.05aFukuchiliteCu3FeS8Iso. m3 (2/m 3) : Pa3
2.EB.05aVillamanínite(Cu,Ni,Co,Fe)S2Tric.
2.EB.05aErlichmaniteOsS2Iso. m3 (2/m 3) : Pa3
2.EB.05aSperrylitePtAs2Iso. m3 (2/m 3) : Pa3
2.EB.05aGeversitePtSb2Iso. m3 (2/m 3) : Pa3
2.EB.05aCattieriteCoS2Iso. m3 (2/m 3) : Pa3
2.EB.05aAurostibiteAuSb2Iso. m3 (2/m 3) : Pa3
2.EB.05aTrogtaliteCoSe2Iso. m3 (2/m 3) : Pa3
2.EB.05a vCayeuxite
2.EB.05aKruťaiteCuSe2Iso. m3 (2/m 3) : Pa3
2.EB.05aPyriteFeS2Iso. m3 (2/m 3) : Pa3
2.EB.05aInsizwaitePt(Bi,Sb)2Iso. m3 (2/m 3) : Pa3
2.EB.05bBambollaiteCu(Se,Te)2Tet.
2.EB.05aDzharkeniteFeSe2Iso. m3 (2/m 3) : Pa3
2.EB.10aMarcasiteFeS2Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.10eParacostibiteCoSbSOrth. mmm (2/m 2/m 2/m) : Pbca
2.EB.10fOeniteCoSbAsOrth.
2.EB.10ePararammelsbergiteNiAs2Orth. mmm (2/m 2/m 2/m) : Pbca
2.EB.10aMattagamiteCoTe2Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.10aFrohbergiteFeTe2Orth. mmm (2/m 2/m 2/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/m 2/m 2/m) : Pnnm
2.EB.10aKulleruditeNiSe2Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.10aFerroseliteFeSe2Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.15bSeinäjokiteFeSb2Orth.
2.EB.15aRammelsbergiteNiAs2Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.15aClinosaffloriteCoAs2Mon. 2/m : P21/m
2.EB.15cPaxiteCuAs2Mon. 2/m : P21/b
2.EB.15aNisbiteNiSb2Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.15aLöllingiteFeAs2Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.15aSafflorite(Co,Ni,Fe)As2Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.15aOmeiite(Os,Ru)As2Orth.
2.EB.15aAnduoite(Ru,Os)As2Orth.
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/m 3) : Pa3
2.EB.25MaslovitePtBiTeIso. 2 3 : P21 3
2.EB.25ParagersdorffiteNi(As,S)2Iso. m3 (2/m 3) : Pa3
2.EB.25OrthogersdorffiteNiAsSOrth. mm2 : Pca21
2.EB.25JolliffeiteNiAsSeIso. m3 (2/m 3) : Pa3
2.EB.25CobaltiteCoAsSOrth. mm2 : Pca21
2.EB.25GuixiangiteNiBiSIso. 2 3 : P21 3
2.EB.25TestibiopalladitePdSbTeIso.
2.EB.25 vaAntimony-bearing GersdorffiteNi(As,Sb)S
2.EB.25KalungaitePdAsSeIso. m3 (2/m 3) : Pa3
2.EB.25Hollingworthite(Rh,Pt,Pd)AsSIso. m3 (2/m 3) : Pa3
2.EB.25MicheneritePdBiTeIso. 2 3 : P21 3
2.EB.25GersdorffiteNiAsSIso. 2 3 : P21 3
2.EB.25MilotaitePdSbSeIso. 2 3 : P21 3
2.EB.25TolovkiteIrSbSIso.
2.EB.25PlatarsitePt(As,S)2Iso. m3 (2/m 3) : Pa3
2.EB.25WillyamiteCoSbS
2.EB.25ChangchengiteIrBiSIso. 2 3 : P21 3
2.EB.25KrutoviteNiAs2Iso. 2 3 : P21 3
2.EB.25PadmaitePdBiSeIso. 4 3 2
2.EB.25UllmanniteNiSbSIso. 2 3 : P21 3
2.EB.25Irarsite(Ir,Ru,Rh,Pt)AsSIso. m3 (2/m 3) : Pa3
2.EB.30UrvantsevitePd(Bi,Pb)2Tet. 4/mmm (4/m 2/m 2/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 KvačekiteHide

References for KvačekiteHide

Localities for KvačekiteHide

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.
Czech Republic (TL)
 
  • Vysočina Region
    • Žďár nad Sázavou District
      • Rožná
        • Rožná deposit
Bosi et al. (2024)
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