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Chovanite

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Formula:
Pb
 
15-2x
Sb
 
14+2x
S
 
36
O
 
x
(x ~ 0.2)
May contain minor Tl.
System:MonoclinicColour:Grey
Hardness:3
Name:Named after Prof. Martin Chovan (b. 1946) outstanding Slovak mineralogist, Department of Mineralogy and Petrology, Comenius University, Bratislava, Slovakia.
This page provides mineralogical data about Chovanite.

Classification of Chovanite

IMA status:Approved 2009
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:3.10.4.

3 : SULFOSALTS
10 :
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Type Occurrence of Chovanite

Type Locality:Dúbrava, Liptovský Mikuláš Co., Žilina Region, Slovakia
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 Materials Engineering and Physics, University of Salzburg, Salzburg, Austria (calalogue No. 14995); Department of Mineralogy and Petrology, National Museum, Prague, Czech Republic (catalogue No. P1P 13/2009); Department of Mineralogy and Pet
Geological Setting of type material:In hydrothermal antimony ore deposit.
Associated Minerals at type locality:
ScainiiteRobinsoniteDadsoniteBoulangerite

Physical Properties of Chovanite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Grey
Hardness (Mohs):3
Hardness (Vickers):VHN25=213 - 238 kg/mm2
Comment:Mohs hardness derived from VHN.
Tenacity:Brittle
Cleavage:Distinct/Good
parallel to the c axis
Density (calculated):7.14 g/cm3

Crystallography of Chovanite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/m
Space Group 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 Volume:V 6517 ų
Z:4
X-Ray Powder Diffraction:
d-spacingIntensity
4.012 (39)
3.966 (39)
3.793 (23)
3.433 (100)
3.416 (22)
3.387 (31)
3.376 (27)
3.269 (29)
2.996 (26)
2.956 (21)
2.930 (23)
Comments:Sample from Dúbrava, Slovakia.

Optical Data of Chovanite

Type:Anisotropic
Anisotropism:Moderate to strong both in air and oil.
Bireflectance:Distinct in air, and further enhanced in oil.
Reflectivity:
400nmR1=42.7%R2= 44.0%
420nmR1=39.5%R2= 45.0%
440nmR1=39.3%R2= 44.5%
460nmR1=38.2%R2= 44.1%
480nmR1=37.8%R2= 43.5%
500nmR1=37.8%R2= 43.5%
520nmR1=37.4%R2= 43.4%
540nmR1=36.7%R2= 43.2%
560nmR1=36.6%R2= 42.6%
580nmR1=35.7%R2= 41.5%
600nmR1=35.1%R2= 40.9%
620nmR1=34.8%R2= 40.2%
640nmR1=34.3%R2= 39.4%
660nmR1=33.6%R2= 38.7%
680nmR1=33.0%R2= 37.5%
700nmR1=32.6%R2= 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.

Chemical Properties of Chovanite

Formula:
Pb
 
15-2x
Sb
 
14+2x
S
 
36
O
 
x
(x ~ 0.2)


May contain minor Tl.
Simplified for copy/paste:Pb15-2xSb14+2xS36Ox (x ~ 0.2)
Essential elements:O, Pb, S, Sb
All elements listed in formula:O, Pb, S, Sb
Analytical Data:Average of 18 electron-microprobe analyses; sample from Dúbrava, Slovakia.
Ag (0.07)
Pb (50.72)
Sb (29.28)
Bi (0.10)
S (19.50)
Se (0.05)
Cl (0.04)
Total (99.76)
Empirical Formula:
Pb
 
14.51
Ag
 
0.04
(Sb
 
14.26
Bi
 
0.03
)(S
 
36.06
Se
 
0.04
Cl
 
0.07
)

Relationship of Chovanite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.JB.05Diaphorite
Ag
 
3
Pb
 
2
Sb
 
3
S
 
8
2.JB.10Cosalite
Pb
 
2
Bi
 
2
S
 
5
2.JB.15Freieslebenite
AgPbSbS
 
3
2.JB.15Marrite
AgPbAsS
 
3
2.JB.20Cannizzarite
Pb
 
4
Bi
 
6
S
 
13
2.JB.20Wittite
Pb
 
9
Bi
 
12
(S,Se)
 
27
2.JB.25aJunoite
Cu
 
2
Pb
 
3
Bi
 
8
(S,Se)
 
16
2.JB.25iNeyite
Ag
 
2
Cu
 
6
Pb
 
25
Bi
 
26
S
 
68
2.JB.25cNordströmite
CuPb
 
3
Bi
 
7
(Se
 
4
S
 
10
)
2.JB.25gNuffieldite
Cu
 
1.4
Pb
 
2.4
Bi
 
2.4
Sb
 
0.2
S
 
7
2.JB.25dProudite
CuPb
 
7.5
Bi
 
9.33
(S,Se)
 
22
2.JB.25hWeibullite
Pb
 
5
Bi
 
8
Se
 
7
S
 
11
2.JB.25bFelbertalite
Cu
 
2
Pb
 
6
Bi
 
8
S
 
19
2.JB.25jRouxelite
Cu
 
2
HgPb
 
23
Sb
 
27
S
 
65.5
2.JB.25fÁngelaite
Cu
 
2
AgPbBiS
 
4
2.JB.25iCuproneyite
Cu
 
7
Pb
 
27
Bi
 
25
S
 
68
2.JB.30aGeocronite
Pb
 
14
(Sb,As)
 
6
S
 
23
2.JB.30aJordanite
Pb
 
14
(As,Sb)
 
6
S
 
23
2.JB.30bKirkiite
Pb
 
10
Bi
 
3
As
 
3
S
 
19
2.JB.30cTsugaruite
Pb
 
4
As
 
2
S
 
7
2.JB.35cPillaite
Pb
 
9
Sb
 
10
S
 
23
ClO
 
0.5
2.JB.35aZinkenite
Pb
 
9
Sb
 
22
S
 
42
2.JB.35bScainiite
Pb
 
14
Sb
 
30
S
 
54
O
 
5
2.JB.35dPellouxite
(Cu,Ag)Pb
 
10
Sb
 
12
S
 
27
O(Cl,S)
 
0.6
2.JB.35fTubulite
Ag
 
2
Pb
 
22
Sb
 
20
S
 
53
2.JB.40bAschamalmite
Pb
 
6
Bi
 
2
S
 
9
2.JB.40aBursaite
Pb
 
5
Bi
 
4
S
 
11
(?)
2.JB.40bEskimoite
Ag
 
7
Pb
 
10
Bi
 
15
S
 
36
2.JB.40aFizélyite
Ag
 
5
Pb
 
14
Sb
 
21
S
 
48
2.JB.40aGustavite
Ag
 
3
Pb
 
5
Bi
 
11
S
 
24
2.JB.40aLillianite
Pb
 
3-2x
Ag
 
x
Bi
 
2+x
S
 
6
2.JB.40cOurayite
Ag
 
3
Pb
 
4
Bi
 
5
S
 
13
2.JB.40aRamdohrite
(Cd,Mn,Fe)Ag
 
5.5
Pb
 
12
Sb
 
21.5
S
 
48
2.JB.40aRoshchinite
Ag
 
19
Pb
 
10
Sb
 
51
S
 
96
2.JB.40dSchirmerite
PbAgBi
 
3
S
 
6
- Pb
 
3
Ag
 
1.5
Bi
 
3.5
S
 
9
2.JB.40aTreasurite
Ag
 
7
Pb
 
6
Bi
 
15
S
 
32
2.JB.40aUchucchacuaite
AgMnPb
 
3
Sb
 
5
S
 
12
2.JB.40eUstarasite
Pb(Bi,Sb)
 
6
S
 
10
(?)
2.JB.40aVikingite
Ag
 
5
Pb
 
8
Bi
 
13
S
 
30
2.JB.40aXilingolite
Pb
 
3
Bi
 
2
S
 
6
2.JB.40bHeyrovskýite
Pb
 
10
AgBi
 
5
S
 
18
2.JB.40UM1988-05-S:AgBiCuHgPb
(Hg,Ag,Cu,Pb)
 
5
Pb
 
5
Bi
 
11
S
 
27
2.JB.40UM1988-06-S:AgBiCuHgPb
(Pb,Hg)
 
12
(Cu,Ag)
 
3
(Bi,Sb)
 
10
(S,Te)
 
27
2.JB.40aAndorite IV
Pb
 
18
Ag
 
15
Sb
 
47
S
 
96
2.JB.55Gratonite
Pb
 
9
As
 
4
S
 
15
2.JB.60Marrucciite
Hg
 
3
Pb
 
16
Sb
 
18
S
 
46
2.JB.65Vurroite
Pb
 
20
Sn
 
2
(Bi,As)
 
22
S
 
54
Cl
 
6

Other Names for Chovanite

Synonyms:
IMA2009-055
Other Languages:

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Chovanite

Reference List:

- +
Topa, D., Sejkora, J., Makovicky, E., Pršek, J., Ozdín, D., Putz, H., Dittrich, H. & Karup-Møller, S. (2012): Chovanite, Pb15-2xSb14+2xS36Ox (x ~ 0.2), a new sulphosalt species from the Low Tatra Mountains, Western Carpathians, Slovakia. European Journal of Mineralogy, 24, 727-740.

Internet Links for Chovanite

Search Engines:
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  • External Links:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Mineral Dealers:
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  • Fine Minerals from Weinrich Minerals, Inc.
  • Find Chovanite on www.crystalclassics.co.uk
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  • Buy from David K Joyce minerals
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  • Localities for Chovanite

    The 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.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Italy
     
    • Tuscany
      • Lucca Province
        • Apuan Alps
          • Stazzema
            • Sant'Anna di Stazzema
    Biagioni, C., Moëlo, Y., Orlandi, P. (2014): Lead-antimony sulfosalts from Tuscany (Italy). XV. (Tl-Ag)-bearing rouxelite from Monte Arsiccio mine: occurrence and crystal-chemistry. Mineralogical Magazine, 78, 651–661.
    Slovakia
     
    • Žilina Region
      • Liptovský Mikuláš Co.
    Topa, D., Sejkora, J., Makovicky, E., Pršek, J., Ozdín, D., Putz, H., Dittrich, H. & Karup-Møller, S. (2012): Chovanite, Pb15-2xSb14+2xS36Ox (x ~ 0.2), a new sulphosalt species from the Low Tatra Mountains, Western Carpathians, Slovakia. European Journal of Mineralogy, 24, 727-740.
        • Liptovské Kľačany
    Topa, D., Sejkora, J., Makovicky, E., Pršek, J., Ozdín, D., Putz, H., Dittrich, H. & Karup-Møller, S. (2012): Chovanite, Pb15-2xSb14+2xS36Ox (x ~ 0.2), a new sulphosalt species from the Low Tatra Mountains, Western Carpathians, Slovakia. European Journal of Mineralogy, 24, 727-740.
        • Partizánska Lupča
    Topa, D., Sejkora, J., Makovicky, E., Pršek, J., Ozdín, D., Putz, H., Dittrich, H. & Karup-Møller, S. (2012): Chovanite, Pb15-2xSb14+2xS36Ox (x ~ 0.2), a new sulphosalt species from the Low Tatra Mountains, Western Carpathians, Slovakia. European Journal of Mineralogy, 24, 727-740.
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