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Chovanite

A valid IMA mineral species
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About ChovaniteHide

08475570017272471905907.jpg
Martin Chovan
Formula:
Pb15-2xSb14+2xS36Ox (x ~ 0.2)
May contain minor Tl; the Monte Arsiccio material has a formula close to TlPb26(Sb,As)31S72O, while the Pollone's one is close to Pb28(Sb,As)30S72O
Colour:
Grey, black
Lustre:
Metallic
Hardness:
3
Specific Gravity:
6.029 (Calculated)
Crystal System:
Monoclinic
Name:
Named after Prof. Martin Chovan (b. 1946) outstanding Slovak mineralogist, Department of Mineralogy and Petrology, Comenius University, Bratislava, Slovakia. He has performed extensive studies of antimony mineralization in the Western Carpathians. Pronunciation of the name is ‘‘khovanite’.
The single oxygen atom in the structure is bound to two (Sb,As) atoms, which alternate with vacant positions along b; this feature is also observed in other Pb oxy-sulphosalts like scainiite. The material from the Pollone mine has the 8 Å structure, modular, which is topologically derived from pellouxite.


Unique IdentifiersHide

Mindat ID:
39970
Long-form identifier:
mindat:1:1:39970:6

IMA Classification of ChovaniteHide

Classification of ChovaniteHide

2.JB.35e

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
J : Sulfosalts of PbS archetype
B : Galena derivatives, with Pb
3.10.4.

3 : SULFOSALTS
10 :

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

Physical Properties of ChovaniteHide

Metallic
Transparency:
Opaque
Colour:
Grey, black
Hardness:
Hardness:
VHN25=213 - 238 kg/mm2 - Vickers
Comment:
Mohs hardness derived from VHN.
Tenacity:
Brittle
Cleavage:
Distinct/Good
parallel to the c axis
Density:
6.029 g/cm3 (Calculated)
Comment:
(The published 7.14 seems to be an error?)

Optical Data of ChovaniteHide

Anisotropism:
Moderate to strong both in air and oil.
Bireflectance:
Distinct in air, and further enhanced in oil.
Reflectivity:
WavelengthR1 (%)R2 (%)
400nm42.7% 44.0%
420nm39.5% 45.0%
440nm39.3% 44.5%
460nm38.2% 44.1%
480nm37.8% 43.5%
500nm37.8% 43.5%
520nm37.4% 43.4%
540nm36.7% 43.2%
560nm36.6% 42.6%
580nm35.7% 41.5%
600nm35.1% 40.9%
620nm34.8% 40.2%
640nm34.3% 39.4%
660nm33.6% 38.7%
680nm33.0% 37.5%
700nm32.6% 37.1%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 45.0%.
R1 shown in black, R2 shown in red
Colour in reflected light:
White
Internal Reflections:
Absent
Pleochroism:
Visible
Comments:
From white with a yellowish green tint (darkest position) to white with a faint bluish tint (lightest position).
Comments:
The optical properties are very similar to boulangerite.

Chemistry of ChovaniteHide

Mindat Formula:
Pb15-2xSb14+2xS36Ox (x ~ 0.2)

May contain minor Tl; the Monte Arsiccio material has a formula close to TlPb26(Sb,As)31S72O, while the Pollone's one is close to Pb28(Sb,As)30S72O

Crystallography of ChovaniteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 48.189(48) Å, b = 4.1104(40) Å, c = 34.235(35) Å
β = 106.059(15)°
Ratio:
a:b:c = 11.724 : 1 : 8.329
Unit Cell V:
6517 ų
Z:
4
Morphology:
Acicular crystals from Monte Arsiccio are up to 5 mm in length; thick acicular crystals from the Pollone mine are up to 1 cm in length.
Comment:
Pollone mine material parameters: a = 48.38(5), b = 4.11(4), c = 34.18(4) Å, β = 106.26°; the 8 Å structural type has the space group P21/a and the unit-cell parameters a = 34.052(3), b = 8.2027(7), c = 48.078(4) Å, β = 106.258(4)°.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0006272ChovaniteMakovicky E, Topa D (2009) The crystal structure of sulfosalts with the boxwork architecture and their new representative, Pb15-2xSb14+2xS36Ox The Canadian Mineralogist 47 3-242009Klacianka Sb deposit, Low Tatra Mountains, Slovakia0293
0006272ChovaniteMakovicky E, Topa D (2009) The crystal structure of sulfosalts with the boxwork architecture and their new representative, Pb15-2xSb14+2xS36Ox The Canadian Mineralogist 47 3-242009Klacianka Sb deposit, Low Tatra Mountains, Slovakia0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.012 Å(39)
3.966 Å(39)
3.793 Å(23)
3.433 Å(100)
3.416 Å(22)
3.387 Å(31)
3.376 Å(27)
3.269 Å(29)
2.996 Å(26)
2.956 Å(21)
2.930 Å(23)
Comments:
Sample from Dúbrava, Slovakia.

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])
Geological Setting:
Monte Arsiccio mine (vugs in metadolostones)

Type Occurrence of ChovaniteHide

General Appearance of Type Material:
Irregular aggregates up to 1 cm in size. Irregular or short prismatic grains up to 0.1 mm in length, intergrown with lamellae, needles and irregular patches of other Pb-Sb sulphosalts
Place of Conservation of Type Material:
Department of Mineralogy and Petrography of the NHM Vienna (cat. no. O 2406) (formerly in the collection of the Department of Materials Engineering and Physics, Univ. of Salzburg, former cat. no. 14995); Department of Mineralogy and Petrology, National Museum, Prague, Czech Republic (catalogue No. P1P 13/2009); Department of Mineralogy and Petrology, Faculty of Natural Sciences, Comenius University, Bratislava, under (catalogue no. 7282).
Geological Setting of Type Material:
In hydrothermal antimony ore deposit.
Associated Minerals at Type Locality:

Synonyms of ChovaniteHide

Other Language Names for ChovaniteHide

Dutch:Chovaniet
German:Chovanit

Common AssociatesHide

Associations Based on Photo Data:
1 photo of Chovanite associated with RobinsonitePb4Sb6S13
1 photo of Chovanite associated with QuartzSiO2

Related Minerals - Strunz-mindat GroupingHide

2.JB.Clino-oscarkempffiteAg15Pb6Sb21Bi18S72Mon. 2/m : P21/b
2.JB.ArsenquatrandoriteAg17.6Pb12.8Sb38.1As11.5S96Mon. 2/m : P21/b
2.JB.GinelfiteAg2(Ag0.5Fe)TlPb23.5(Sb,As)33.5S76Tric. 1 : P1
2.JB.AndreadiniiteCuHgAg7Pb7Sb24S48Mon. 2/m : P21/b
2.JB.ChukotkaiteAgPb7Sb5S15Mon. 2/m : P21/b
2.JB.SelenojunoiteCu2Pb3Bi8Se16Mon. 2/m : B2/m
2.JB.LechneriteAg10Cu4HgPb33Sb58S128Tric. 1 : P1
2.JB.Cuprosenandorite Ag16Cu8Pb24Sb72S144Orth. mm2 : Pna21
2.JB.MorleyiteAg2CuPb25Sb24As4S68.5Tric. 1 : P1
2.JB.LazerckeriteAg3.75Pb4.50(Sb7.75Bi4)S24Mon. 2/m : P21/b
2.JB.LasmanisiteAg12Pb13Mn11Sb44S96Orth. 222 : P212121
2.JB.MontpelvouxiteAgPb16Sb27As18S84Tric. 1 : P1
2.JB.SenandoriteAgPbSb3S6Orth. mm2 : Pmn21
2.JB.OscarkempffiteAg10Pb4(Sb17Bi9)S48Orth. mm2
2.JB.05DiaphoriteAg3Pb2Sb3S8Mon. 2/m : P21/b
2.JB.10CosalitePb2Bi2S5Orth. mmm(2/m2/m2/m)
2.JB.15MarriteAgPbAsS3Mon. 2/m : P21/b
2.JB.15FreieslebeniteAgPbSbS3Mon. 2/m : P21/b
2.JB.20CannizzaritePb48Bi56S132Mon. 2/m : P21/m
2.JB.20WittitePb9Bi12(S,Se)27Mon.
2.JB.25jRouxeliteCu2HgPb23Sb27S65.5Tric. 1 : P1
2.JB.25iNeyiteAg2Cu6Pb25Bi26S68Mon. 2/m : B2/m
2.JB.25aJunoiteCu2Pb3Bi8(S,Se)16Mon. 2/m : B2/m
2.JB.25fÁngelaiteCu2AgPbBiS4Orth. mmm(2/m2/m2/m) : Pnma
2.JB.25eGalenobismutitePbBi2S4Orth. mmm(2/m2/m2/m)
2.JB.25cNordströmiteCuPb3Bi7(Se4S10)Mon. 2/m : P21/m
2.JB.25iCuproneyiteCu7Pb27Bi25S68Mon. 2/m : B2/m
2.JB.25gNuffielditeCu1.4Pb2.4Bi2.4Sb0.2S7Orth. mmm(2/m2/m2/m)
2.JB.25hWeibullitePb5Bi8Se7S11Orth. mmm(2/m2/m2/m) : Pnma
2.JB.25dProuditeCuPb7.5Bi9.33(S,Se)22Mon. 2/m : B2/m
2.JB.25bFelbertaliteCu2Pb6Bi8S19Mon. 2/m : B2/m
2.JB.30aJordanitePb14As6S23Mon. 2/m : P21/m
2.JB.30aGeocronitePb14Sb6S23Mon. 2/m : P21/m
2.JB.30aArsenmarcobaldiitePb12(As3.2Sb2.8)Σ6S21Tric. 1 : P1
2.JB.30bKirkiitePb10Bi3As3S19Mon. 2/m : P21/m
2.JB.30cTsugaruitePb28As15S50ClOrth. mm2 : Pnn2
2.JB.30aMarcobaldiitePb12(Sb3As2Bi)Σ6S21Tric. 1 : P1
2.JB.35dPellouxite(Cu,Ag)Pb10Sb12S27O(Cl,S)0.6Mon. 2/m : B2/m
2.JB.35aZinkenitePb9Sb22S42Hex. 6 : P63
2.JB.35cPillaitePb9Sb10S23ClO0.5Mon. 2/m : B2/m
2.JB.35bScainiitePb14Sb30S54O5Mon. 2/m : B2/m
2.JB.35fTubuliteAg2Pb22Sb20S53 Mon. m : Pb
2.JB.40aFizélyiteAg5Pb14Sb21S48 Mon. 2/m
2.JB.40aRamdohritePb5.9Fe0.1Mn0.1In0.1Cd0.2Ag2.8Sb10.8S24Mon. 2/m
2.JB.40eUstarasitePb(Bi,Sb)6S10 (?)
2.JB.40a'Bursaite'Pb5Bi4S11 (?)Orth.
2.JB.40'UM1988-05-S:AgBiCuHgPb'(Hg,Ag,Cu,Pb)5Pb5Bi11S27
2.JB.40'UM1988-06-S:AgBiCuHgPb'(Pb,Hg)12(Cu,Ag)3(Bi,Sb)10(S,Te)27
2.JB.40aTerrywallaceiteAgPb(Sb,Bi)3S6Mon. 2/m : P21/b
2.JB.40aJasrouxiteAg16Pb4(Sb25As15)S72Tric. 1 : P1
2.JB.40aTarutinoiteAg3Pb7Bi7S19Mon. 2/m : B2/m
2.JB.40aOyoniteAg3Mn2Pb4Sb7As4S24Mon. 2/m
2.JB.40bHeyrovskýitePb6Bi2S9Orth. mmm(2/m2/m2/m) : Cccm
2.JB.40aQuatrandoriteAgPbSb3S6Mon. 2/m : P21/b
2.JB.40aErzwiesiteAg8Pb12Bi16S40Orth. mmm(2/m2/m2/m) : Cmcm
2.JB.40aVikingiteAg5Pb8Bi13S30Mon. 2/m : B2/m
2.JB.40aLillianitePb3-2xAgxBi2+xS6Orth. mmm(2/m2/m2/m)
2.JB.40bBaiamareiteAg4Pb12Fe4Sb20S48Mon. 2/m
2.JB.40aStaročeskéiteAg0.70Pb1.60(Bi1.35Sb1.35)Σ2.70S6Orth. mmm(2/m2/m2/m) : Cmcm
2.JB.40aRoshchiniteAg19Pb10Sb51S96Orth. mmm(2/m2/m2/m) : Pnma
2.JB.40bAschamalmitePb6-3xBi2+xS9Mon. 2/m : B2/m
2.JB.40bEskimoiteAg7Pb10Bi15S36Mon.
2.JB.40aMenchettiiteAgPb2.40Mn1.60Sb3As2S12Mon. 2/m : P21/b
2.JB.40aHolubiteAg3Pb6(Sb8Bi3)S24Mon. 2/m
2.JB.40aBrusnitsyniteMn3CuPbAs3Sb2S12Mon. 2/m : P21/b
2.JB.40aTreasuriteAg7Pb6Bi15S32Mon.
2.JB.40cOurayiteAg3Pb4Bi5S13Orth.
2.JB.40aUchucchacuaiteAgMnPb3Sb5S12Orth. mmm(2/m2/m2/m) : Pmmm
2.JB.40d'Schirmerite'PbAgBi3S6 - Pb3Ag1.5Bi3.5S9Orth.
2.JB.40aXilingolitePb3Bi2S6Mon.
2.JB.40aGustaviteAgPbBi3S6Orth. mmm(2/m2/m2/m)
2.JB.55GratonitePb9As4S15Trig. 3m : R3m
2.JB.60MarrucciiteHg3Pb16Sb18S46Mon. 2/m : B2/m
2.JB.65VurroitePb20Sn2(Bi,As)22S54Cl6Mon. 2/m : B2/b
2.JB.65TazieffitePb20Cd2(As,Bi)22S50Cl10Mon. 2/m : B2/b
2.JB.70DaliranitePbHgAs2S5Mon.

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 ChovaniteHide

References for ChovaniteHide

Localities for ChovaniteHide

Showing 10 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.
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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.
Italy
 
  • Tuscany
    • Lucca Province
      • Pietrasanta
        • Valdicastello Carducci
Biagioni et al. (2014)
      • Stazzema
        • Sant'Anna di Stazzema
Biagioni et al. (2014)
Färber (n.d.)
Kosovo
 
  • Pristina District
    • Graçanica
      • Badoc
Mederski et al. (2021) +1 other reference
      • Gračanica (Graçanicë)
Mederski et al. (2019)
Slovakia (TL)
 
  • Žilina Region
    • Liptovský Mikuláš District
      • Dúbrava
Topa et al. (2012)
          • Ľudovít adit
Števko M. (2021)
      • Liptovské Kľačany
Topa et al. (2012) +1 other reference
      • Partizánska Ľupča
Topa et al. (2012)
 
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