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Petříčekite

A valid IMA mineral species
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07331070015317610616895.jpg
Petříčekite, etc.

Cacheuta Mine, Cerro de Cacheuta, Sierra de Cacheuta, Cacheuta District, Luján de Cuyo department, Mendoza Province, Argentina
07886590015317610641951.jpg
Petříčekite, etc.

Cacheuta Mine, Cerro de Cacheuta, Sierra de Cacheuta, Cacheuta District, Luján de Cuyo department, Mendoza Province, Argentina
07743290014956327153896.jpg
Petříčekite

El Dragón mine, Porco Municipality, Antonio Quijarro Province, Potosí, Bolivia
03357520015283778545157.jpg
Petříčekite, etc.

Cacheuta Mine, Cerro de Cacheuta, Sierra de Cacheuta, Cacheuta District, Luján de Cuyo department, Mendoza Province, Argentina
06741460015283781705700.jpg
Petříčekite, etc.

Cacheuta Mine, Cerro de Cacheuta, Sierra de Cacheuta, Cacheuta District, Luján de Cuyo department, Mendoza Province, Argentina
04894850014948563383804.jpg
Petříčekite

El Dragón mine, Porco Municipality, Antonio Quijarro Province, Potosí, Bolivia
07331070015317610616895.jpg
Petříčekite, etc.

Cacheuta Mine, Cerro de Cacheuta, Sierra de Cacheuta, Cacheuta District, Luján de Cuyo department, Mendoza Province, Argentina
07886590015317610641951.jpg
Petříčekite, etc.

Cacheuta Mine, Cerro de Cacheuta, Sierra de Cacheuta, Cacheuta District, Luján de Cuyo department, Mendoza Province, Argentina
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About PetříčekiteHide

04838110017103359869735.jpg
RNDr. Václav Petříček
Formula:
CuSe2
Colour:
Black
Lustre:
Metallic
Hardness:
2 - 2½
Specific Gravity:
6.673 (Calculated)
Crystal System:
Orthorhombic
Member of:
Marcasite Group
Name:
Named in honor of Václav Petříček (1948 - ), crystallographer with the Institute of Physics of the Czech Academy of Sciences, Prague, Czech Republic.
Dimorph of:
Krut'aite
Isostructural with:
Marcasite
The Cu analogue of ferroselite and kullerudite. Chemically related minerals: athabascaite, bellidoite, berzelianite, klockmannite, umangite.

Associated, i.a., with some unknown selenides.

The structure is based on edge-sharing chains of CuSe6 octahedra, that are parallel to [001]. Sharing of Se2 dimers provides a link between the chains, and the Se–Se bonds are parallel to (001).


Unique IdentifiersHide

Mindat ID:
47038
Long-form identifier:
mindat:1:1:47038:4
GUID
(UUID V4):
2ae4bcaa-e2f1-4975-adeb-b368cb73fcf7

IMA Classification of PetříčekiteHide

Classification of PetříčekiteHide

Strunz-mindat (2024):
2.EB.10a

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

Physical Properties of PetříčekiteHide

Lustre:
Metallic
Transparency:
Opaque
Colour:
Black
Streak:
Black
Hardness:
2 - 2½ on Mohs scale
Hardness:
VHN15=28 - 40 kg/mm2 - Vickers
Comment:
ca. 2-2.5
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
6.673 g/cm3 (Calculated)

Optical Data of PetříčekiteHide

Anisotropism:
light grey-blue to light pink rotation tints
Bireflectance:
weakly bireflectant from slightly blue-grey to slightly pinkish-grey
Reflectivity:
WavelengthR1R2
470nm42.35% 41.8%
546nm42.0% 42.2%
589nm41.9% 42.35%
650nm42.05% 42.85%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 42.85%.
R1 shown in black, R2 shown in red
Colour in reflected light:
pale blue grey to pale pinkish
Internal Reflections:
none
Pleochroism:
Weak

Chemistry of PetříčekiteHide

Mindat Formula:
CuSe2
Elements listed:
Cu, Se - search for minerals with similar chemistry
Common Impurities:
Fe

Crystallography of PetříčekiteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pnnm
Setting:
Pnnm
Cell Parameters:
a = 4.918(2) Å, b = 6.001(2) Å, c = 3.670(1) Å
Ratio:
a:b:c = 0.82 : 1 : 0.612
Unit Cell V:
108.31 ų
Z:
2

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.135 Å(20)
2.938 Å(70)
2.639 Å(100)
2.563 Å(85)
1.935 Å(70)
1.834 Å(30)
1.760 Å(25)
1.492 Å(25)

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])
Geological Setting:
El Dragón mine; possibly also in the Sierra de Cacheuta

Type Occurrence of PetříčekiteHide

Type Locality:
ⓘ Předbořice deposit, Předbořice, Kovářov, Písek District, South Bohemian Region, Czech Republic
General Appearance of Type Material:
inclusions, to 150 μm, in eucairite grains
Place of Conservation of Type Material:
collections of the Harvard Mineralogical and Geological Museum, Cambridge, MA 02138, USA (reference number MGMH#2016.01)
Associated Minerals at Type Locality:
KlockmanniteEucairiteAthabascaite
Reference:
Bindi, L., Förster, H.-J., Grundmann, G., Keutsch, F.N. and Stanley, C.J. (2016) Petříčekite, CuSe2, a new member of the marcasite group from the Předbořice deposit, Central Bohemia Region, Czech Republic. Minerals: 6(2): 33.

Synonyms of PetříčekiteHide

Relationship of Petříčekite to other SpeciesHide

Member of:
Marcasite Group
Other Members of this group:
FerroseliteFeSe2Orth. mmm (2/m 2/m 2/m) : Pnnm
FrohbergiteFeTe2Orth. mmm (2/m 2/m 2/m) : Pnnm
KulleruditeNiSe2Orth. mmm (2/m 2/m 2/m) : Pnnm
MarcasiteFeS2Orth. mmm (2/m 2/m 2/m) : Pnnm
MattagamiteCoTe2Orth. mmm (2/m 2/m 2/m) : Pnnm

Common AssociatesHide

Associated Minerals Based on Photo Data:
9 photos of Petříčekite associated with Krut'aiteCuSe2
7 photos of Petříčekite associated with SeleniumSe
4 photos of Petříčekite associated with OlsacheritePb2(Se6+O4)(SO4)
4 photos of Petříčekite associated with MolybdomenitePbSeO3
3 photos of Petříčekite associated with ClausthalitePbSe
2 photos of Petříčekite associated with Goethiteα-Fe3+O(OH)
1 photo of Petříčekite associated with EucairiteAgCuSe
1 photo of Petříčekite associated with UraniniteUO2
1 photo of Petříčekite associated with CalciteCaCO3
1 photo of Petříčekite associated with CovelliteCuS

Related Minerals - Strunz-mindat GroupingHide

2.EB.Iridarsenite(Ir,Ru)As2Mon. 2/m : P21/b
2.EB.SelenolauriteRuSe2Iso. m3 (2/m 3) : Pa3
2.EB.AndrieslombaarditeRhSbSIso. 2 3 : P21 3
2.EB.Kanatzidisite(SbBiS3)2Te2Mon. 2/m : P21/m
2.EB.05aAurostibiteAuSb2Iso. m3 (2/m 3) : Pa3
2.EB.05bBambollaiteCu(Se,Te)2Tet.
2.EB.05aCattieriteCoS2Iso. m3 (2/m 3) : Pa3
2.EB.05aErlichmaniteOsS2Iso. m3 (2/m 3) : Pa3
2.EB.05aFukuchiliteCu3FeS8Iso. m3 (2/m 3) : Pa3
2.EB.05aGeversitePtSb2Iso. m3 (2/m 3) : Pa3
2.EB.05aHaueriteMnS2Iso. m3 (2/m 3) : Pa3
2.EB.05aInsizwaitePt(Bi,Sb)2Iso. m3 (2/m 3) : Pa3
2.EB.05aKrut'aiteCuSe2Iso. m3 (2/m 3) : Pa3
2.EB.05aLauriteRuS2Iso. m3 (2/m 3) : Pa3
2.EB.05aPenroseite(Ni,Co,Cu)Se2Iso. m3 (2/m 3) : Pa3
2.EB.05aPyriteFeS2Iso. m3 (2/m 3) : Pa3
2.EB.05aSperrylitePtAs2Iso. m3 (2/m 3) : Pa3
2.EB.05aTrogtaliteCoSe2Iso. m3 (2/m 3) : Pa3
2.EB.05aVaesiteNiS2Iso. m3 (2/m 3) : Pa3
2.EB.05aVillamanínite(Cu,Ni,Co,Fe)S2Tric.
2.EB.05aDzharkeniteFeSe2Iso. m3 (2/m 3) : Pa3
2.EB.05aGaotaiiteIr3Te8Iso. m3 (2/m 3) : Pa3
2.EB.05a vCayeuxite
2.EB.10bAlloclasiteCo1-xFexAsSMon. 2 : P21
2.EB.10dCostibiteCoSbSOrth. mm2 : Pmn21
2.EB.10aFerroseliteFeSe2Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.10aFrohbergiteFeTe2Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.10cGlaucodot(Co0.50Fe0.50)AsSOrth. mm2 : Pmn21
2.EB.10aKulleruditeNiSe2Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.10aMarcasiteFeS2Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.10aMattagamiteCoTe2Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.10eParacostibiteCoSbSOrth. mmm (2/m 2/m 2/m) : Pbca
2.EB.10ePararammelsbergiteNiAs2Orth. mmm (2/m 2/m 2/m) : Pbca
2.EB.10fOeniteCoSbAsOrth.
2.EB.15aAnduoite(Ru,Os)As2Orth.
2.EB.15aClinosaffloriteCoAs2Mon. 2/m : P21/m
2.EB.15aLöllingiteFeAs2Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.15aNisbiteNiSb2Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.15aOmeiite(Os,Ru)As2Orth.
2.EB.15cPaxiteCuAs2Mon. 2/m : P21/b
2.EB.15aRammelsbergiteNiAs2Orth. 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.15bSeinäjokite(Fe,Ni)(Sb,As)2Orth.
2.EB.20ArsenopyriteFeAsSMon. 2/m : P21/b
2.EB.20GudmunditeFeSbSMon. 2/m : P21/b
2.EB.20Osarsite(Os,Ru)AsSMon.
2.EB.20Ruarsite(Ru,Os)AsSMon.
2.EB.25 vaAntimony-bearing GersdorffiteNi(As,Sb)S
2.EB.25CobaltiteCoAsSOrth. mm2 : Pca21
2.EB.25GersdorffiteNiAsSIso. m3 (2/m 3) : Pa3
2.EB.25Hollingworthite(Rh,Pt,Pd)AsSIso. m3 (2/m 3) : Pa3
2.EB.25Irarsite(Ir,Ru,Rh,Pt)AsSIso. m3 (2/m 3) : Pa3
2.EB.25JolliffeiteNiAsSeIso. m3 (2/m 3) : Pa3
2.EB.25KrutoviteNiAs2Iso. 2 3 : P21 3
2.EB.25MaslovitePtBiTeIso. 2 3 : P21 3
2.EB.25MicheneritePdBiTeIso. 2 3 : P21 3
2.EB.25PadmaitePdBiSeIso. 4 3 2
2.EB.25PlatarsitePt(As,S)2Iso. m3 (2/m 3) : Pa3
2.EB.25TestibiopalladitePdSbTeIso.
2.EB.25TolovkiteIrSbSIso.
2.EB.25UllmanniteNiSbSIso. 2 3 : P21 3
2.EB.25WillyamiteCoSbS
2.EB.25ChangchengiteIrBiSIso. 2 3 : P21 3
2.EB.25MayingiteIrBiTeIso. m3 (2/m 3) : Pa3
2.EB.25KalungaitePdAsSeIso. m3 (2/m 3) : Pa3
2.EB.25MilotaitePdSbSeIso. 2 3 : P21 3
2.EB.25ParagersdorffiteNi(As,S)2Iso. m3 (2/m 3) : Pa3
2.EB.25OrthogersdorffiteNiAsSOrth. mm2 : Pca21
2.EB.25KvačekiteNiSbSeIso. 2 3 : P21 3
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 PetříčekiteHide

References for PetříčekiteHide

Localities for PetříčekiteHide

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.
Argentina
 
  • Mendoza Province
    • Luján de Cuyo department
      • Cacheuta District
Grundmann et al. (2018)
          • Cerro de Cacheuta
Bindi et al. (2016) +1 other reference
Bolivia
 
  • Potosí
    • Antonio Quijarro Province
      • Porco Municipality
doi:10.3390/min7050068 +2 other references
Czech Republic (TL)
 
  • South Bohemian Region
    • Písek District
      • Kovářov
        • Předbořice
Bindi et al. (2016)
  • Vysočina Region
    • Žďár nad Sázavou District
      • Nové Město na Moravě
Flégr et al. (2018)
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