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Schapbachite

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Formula:
Ag0.4Pb0.2Bi0.4S
Pb is necessary for the stabilisation of the cubic structure of schapbachite.
System:
Isometric
Colour:
Dark grey
Hardness:
3 - 4
Name:
Named in 1853 by Gustav Adolph Kenngott after the locality where it was originally thought to have existed as a species: Schapbach, Schwartzwald, Baden, Germany. First discredited in 1863 by F. Sandberger as a mixture of bismuthine, argentite, and galena. (Matildite was not named until 1883 by Antonio D'Achiardi.) The original schapbachite specimens were later re-analyzed and found to be a mixture of galena and matildite (Ramdohr, 1936). Hey (1982) reported that schapbachite (of Kenngott) was discredited by vote of the IMA. Schapbachite was re-used in 2004 by Kurt Walenta, H. J. Burnhardt, and T. Theye, although schapbachite did not occur at Schapbach. Pre-2004 reports of "schapbachite" have to be evaluated on the data provided.
Dimorph of:
Note: many specimens originally described as "schapbachite (of Kenngott)" are in fact matildite with or without admixture of galena. Modern verification of any specimen with this designation is required.

Classification of Schapbachite

Approved 1982
Explanation of status:
Redefined by CNMMN (1982) as the high-temperature dimorph of matildite (above 200 deg. C). Described as a natural (ambient temperature) phase by Walenta et al. (2004).
2.JA.15

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
J : Sulfosalts of PbS archetype
A : Galena derivatives with little or no Pb
5.2.18

5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
2 : Sulpharsenites etc. of Ag
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First Recorded Occurrence of Schapbachite

Year of Discovery:
2004

Physical Properties of Schapbachite

Metallic
Diaphaneity (Transparency):
Opaque
Colour:
Dark grey
Streak:
Black
Hardness (Mohs):
3 - 4

Crystallography of Schapbachite

Crystal System:
Isometric

Optical Data of Schapbachite

Type:
Isotropic

Chemical Properties of Schapbachite

Formula:
Ag0.4Pb0.2Bi0.4S

Pb is necessary for the stabilisation of the cubic structure of schapbachite.
Essential elements:
All elements listed in formula:

Relationship of Schapbachite to other Species

Structurally related to group(s):
2.JA.05eBenjaminite(Ag,Cu)3(Bi,Pb)7S12
2.JA.05gBorodaeviteAg5(Bi,Pb,Fe)8(Sb,Bi)2S17
2.JA.05aCupropavoniteAgCu2PbBi5S10
2.JA.05aKitaibeliteAg10PbBi30S51
2.JA.05iLivingstoniteHgSb4S6(S2)
2.JA.05dMakovickyiteCu1.12Ag0.81Pb0.27Bi5.35S9
2.JA.05fMummeite(Cu,Ag)3-4(Bi,Pb)7-8S13
2.JA.05aPavonite(Ag,Cu)(Bi,Pb)3S5
2.JA.05bGrumipluciteHgBi2S4
2.JA.05hMozgovaitePbBi4(S,Se)7
2.JA.05dCupromakovickyiteCu8Pb4Ag2Bi18S36
2.JA.05cKudriavite(Cd,Pb)Bi2S4
2.JA.05aCupromakopavoniteAg3Cu8Pb4Bi19S38
2.JA.05DantopaiteCu1.06Ag4.24Pb0.9Bi12.23S21.89Te0.11
2.JA.10aCuprobismutiteCu8AgBi12S24
2.JA.10cHodrušiteCu8Bi12S22
2.JA.10ePadĕraiteCu5.9Ag1.3Pb1.6Bi11.2S22
2.JA.10dPizgrischite(Cu,Fe)Cu14PbBi17S35
2.JA.10bKupčíkiteCu3.4Fe0.6Bi5S10
2.JA.15CuboargyriteAgSbS2
2.JA.20BohdanowicziteAgBiSe2
2.JA.20MatilditeAgBiS2
2.JA.20VolynskiteAgBiTe2
5.2.1SmithiteAgAsS2
5.2.2TrechmanniteAgAsS2
5.2.3ProustiteAg3AsS3
5.2.4XanthoconiteAg3AsS3
5.2.5Pearceite[(Ag,Cu)6(As,Sb)2S7][Ag9CuS4]
5.2.6Pearceite-T2ac
5.2.7ArgentotennantiteAg6[Cu4(Fe,Zn)2]As4S13
5.2.8MiargyriteAgSbS2
5.2.9PyrargyriteAg3SbS3
5.2.10PyrostilpniteAg3SbS3
5.2.11StephaniteAg5SbS4
5.2.12Polybasite[(Ag,Cu)6(Sb,As)2S7][Ag9CuS4]
5.2.13BillingsleyiteAg7AsS6
5.2.14Polybasite-Tac
5.2.15FreibergiteAg6[Cu4Fe2]Sb4S13-x
5.2.16AramayoiteAg(Sb,Bi)S2
5.2.17MatilditeAgBiS2
5.2.19Pavonite(Ag,Cu)(Bi,Pb)3S5
5.2.20ArcubisiteAg6CuBiS4
5.2.21BohdanowicziteAgBiSe2
5.2.22SelenostephaniteAg5Sb(Se,S)4
5.2.23BenleonarditeAg8(Sb,As)Te2S3
5.2.24VolynskiteAgBiTe2

Other Names for Schapbachite

Name in Other Languages:
Simplified Chinese:硫铅铋银矿
Spanish:Schapbachita

Other Information

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

References for Schapbachite

Reference List:
Sandberger, F. (1863) Jahresbuch fur Mineralogie, p. 797.
Sandberger, F. (1882): Untersuch. Erzgadhge, 1, 90.
Ramdohr, P.(1936): Fortschr. Min. Krist. 20,56.
American Mineralogist (1951): 36: 436.
Acta Crystallographica (1959): 12:46.
American Mineralogist (1975): 60: 621.
Ramdohr, P. (1980), The Ore Minerals and their Intergrowths, 2nd edition: 665.
Hey, Max H. (1982): Mineralogical Magazine, 46, 513-514 [redefinition].
Walenta, K.; Bernhardt, H.-J. & Theye, T. (2004): Cubic AgBiS2 (schapbachite) from the Silberbrünnle mine near Gengenbach in the Central Black Forest, Germany. Neues Jahrbuch für Mineralogie, Monatshefte 2004, 425-432.
Moëlo, Y., Makovicky, E., Mozgova, N.N., Jambor, J.L., Cook, N., Pring, A., Paar, W., Nickel, E.H., Graeser, S., Karup-Møller, S.; Balić-Žunić, T.; Mumme, W.G., Vurro, F., Topa, D., Bindi, L., Bente, K., Shimizu, M. (2008): Sulfosalt systematics: a review. Report of the sulfosalt sub-committee of the IMA Commission on Ore Mineralogy. European Journal of Mineralogy, 20, 7-46.

Internet Links for Schapbachite

Localities for Schapbachite

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Bulgaria
 
  • Pernik Oblast
    • Trun Obshtina
      • Trun (Tran)
- I. Kostov, V. Breskovska, J. Mincheva-Stefanova, G. Kirov (1964): Minerals of Bulgaria. Sofia, Bulgaria, 540 pp. (in Bulgarian).
  • Sofiya Oblast (Sofia Oblast)
    • Botevgrad
Kostov et al.(1964):Minerals of Bulgaria
Chile
 
  • Arica and Parinacota Region
    • Parinacota Province
      • Ticnamar area
Econ Geol (1991) 86:1206-1221
China
 
  • Jilin Province (Manchuria; Dongbei Region)
    • Yanbian Chaoxianzu Autonomous Prefecture
      • Longjing Co.
Hongyuan Xu (2012): Gold Science and Technology 20(1), 46-49
Finland
 
  • Southwestern Finland Region
    • Eurajoki
Pere Tuomas (2009) Fault-related local phenomena in the bedrock of Olkiluoto with particular Reference to Fault Zone. OL-BFZ100 Posiva Working Report 2009-125
France
 
  • Auvergne
    • Haute-Loire
      • Langeac
        • Barlet
P.G. Pélisson : "Etude Minéralogique et Métallogénique du District Filonien Polytype de Paulhaguet (Haute-Loire, Massif Central Français)", Doctorate Thesis, Orléans, France, 1989
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Gengenbach
        • Haigerach valley
Walenta, K., Bernhardt, H.J., Theye, T. (2004): Cubic AgBiS2 (schapbachite) from the Silberbrünnle mine near Gengenbach in the Central Black Forest, Germany. Neues Jahrbuch für Mineralogie - Monatshefte, 2004, 425-432
Kenngott 1853
  • Bavaria
    • Lower Bavaria
      • Bodenmais
Obermüller, T., (1993): Der Silberberg bei Bodenmais/Bayer. Wald, Der Aufschluss, Vol. 44, 201-224
  • Saxony
    • Erzgebirge
Lapis 30(7/8):78-80 (2005)
Italy
 
  • Trentino-Alto Adige
    • Trento Province
      • Mocheni Valley
        • Pergine Valsugana
Exel, R. (1987): Guida mineralogica del Trentino e del Sudtirolo. Athesia, Bolzano, 204 pp.
Peru
 
  • Huancavelica Department
    • Angaraes Province
      • Julcani District
B. Duval, Y. Moëlo and P. Picot, Bull. Minéral. , 1986, 109, pp. 649-655.
Russia
 
  • Far-Eastern region
    • Sakhalinskaya Oblast'
      • Kuril Islands
        • Kunashir Island
Econ Geol (1997) 92:468-484
Slovakia
 
  • Košice Region
    • Gelnica Co.
      • Švedlár (Schwedler)
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
Tajikistan
 
  • Viloyati Sogd (Viloyati Sughd; Viloyati Khodzhent; Viloyati Leninabad)
    • Kuraminskii Range
Evseev, A. A. (1995) Kazaknstan and Middle Asia. A brief Mineralogical Guide. World of Stone 8:24-30
Mineral and/or Locality  
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