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Schapbachite

A valid IMA mineral species - grandfathered
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About SchapbachiteHide

Formula:
Ag0.4Pb0.2Bi0.4S
Pb is necessary for the stabilisation of the cubic structure of schapbachite.
Colour:
Dark grey
Lustre:
Metallic
Hardness:
2½ - 4
Specific Gravity:
7.05 (Calculated)
Crystal System:
Isometric
Name:
Named in 1853 by Gustav Adolph Kenngott after the locality where it was originally thought to have existed as a species: Schapbach, Schwarzwald, Baden, Germany. First discredited in 1863 by F. Sandberger as a mixture of bismuthite, 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.


Unique IdentifiersHide

Mindat ID:
3558
Long-form identifier:
mindat:1:1:3558:9
GUID
(UUID V4):
9630d31a-bf22-4422-b210-c9f35e043185

IMA Classification of SchapbachiteHide

Approved, 'Grandfathered' (first described prior to 1959)
IMA status notes:
Redefined by the IMA
IMA Formula:
Ag0.4Pb0.2Bi0.4S
Approval year:
1982

Classification of SchapbachiteHide

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

Mineral SymbolsHide

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

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

Physical Properties of SchapbachiteHide

Metallic
Transparency:
Opaque
Colour:
Dark grey
Streak:
Black
Hardness:
2½ - 4 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Density:
7.05 g/cm3 (Calculated)

Optical Data of SchapbachiteHide

Type:
Isotropic
Reflectivity:
WavelengthR
470nm45.19%
546nm44.73%
589nm44.32%
650nm43.94%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 45.19%.

Chemistry of SchapbachiteHide

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

Pb is necessary for the stabilisation of the cubic structure of schapbachite.

Crystallography of SchapbachiteHide

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Fm3m
Setting:
Fm3m
Cell Parameters:
a = 5.703 Å
Unit Cell V:
185.49 ų (Calculated from Unit Cell)
Z:
2

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0009219SchapbachiteGeller S, Wernick J H (1959) Ternary semiconducting compounds with sodium chloride-like structure: AgSbSe2, AgSbTe2, AgBiS2, AgBiSe2 Acta Crystallographica 12 46-541959synthetic0293
0009220SchapbachiteGeller S, Wernick J H (1959) Ternary semiconducting compounds with sodium chloride-like structure: AgSbSe2, AgSbTe2, AgBiS2, AgBiSe2 Acta Crystallographica 12 46-541959synthetic0473
0009221SchapbachiteGeller S, Wernick J H (1959) Ternary semiconducting compounds with sodium chloride-like structure: AgSbSe2, AgSbTe2, AgBiS2, AgBiSe2 Acta Crystallographica 12 46-541959synthetic0516
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.290 Å(80)
2.853 Å(100)
2.014 Å(80)

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])

Type Occurrence of SchapbachiteHide

General Appearance of Type Material:
Anhedral and reach about 0.3 mm in size.
Place of Conservation of Type Material:
Staatliches Museum für Naturkunde-Stuttgart, Germany.
Associated Minerals at Type Locality:
Reference:
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

Synonyms of SchapbachiteHide

Other Language Names for SchapbachiteHide

Simplified Chinese:硫铅铋银矿
Spanish:Schapbachita

Relationship of Schapbachite to other SpeciesHide

Structurally related to group(s):

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Schapbachite associated with QuartzSiO2

Related Minerals - Strunz-mindat GroupingHide

2.JA.FerdowsiiteAg8(Sb5As3)S16Mon. 2/m : P21/b
2.JA.SangenaroiteAg8(Sb8-xAsx)SΣ16 Mon. 2/m
2.JA.LuboržákiteMn2AsSbS5Mon. 2/m : B2/m
2.JA.05eBenjaminiteAg3Bi7S12Mon. 2/m : B2/m
2.JA.05gBorodaeviteAg5(Bi,Pb,Fe)8(Sb,Bi)2S17Mon.
2.JA.05aCupropavoniteCu0.9Ag0.5Pb0.6Bi2.5S5 Mon. 2/m : B2/m
2.JA.05iLivingstoniteHgSb4S6(S2)Mon. 2/m : B2/b
2.JA.05dMakovickyiteCu1.12Ag0.81Pb0.27Bi5.35S9Mon. 2/m
2.JA.05fMummeiteCu0.58Ag3.11Pb1.10Bi6.65S13Mon.
2.JA.05aPavoniteAgBi3S5Mon. 2/m : B2/m
2.JA.05bGrumipluciteHgBi2S4Mon. 2/m : B2/m
2.JA.05hMozgovaitePbBi4S7Orth. mmm (2/m 2/m 2/m)
2.JA.05dCupromakovickyiteCu4AgPb2Bi9S18Mon. 2/m : B2/m
2.JA.05cKudriavite(Cd,Pb)Bi2S4Mon. 2/m : B2/m
2.JA.05aCupromakopavoniteAg3Cu8Pb4Bi19S38Mon. 2/m : B2/m
2.JA.05DantopaiteAg5Bi13S22Mon. 2/m : B2/m
2.JA.10aCuprobismutiteCu8AgBi13S24Mon. 2/m : B2/m
2.JA.10cHodrušiteCu8Bi12S22Mon. 2/m
2.JA.10ePadĕraiteCu7[(Cu,Ag)0.33Pb1.33Bi11.33]S22Mon. 2/m : P21/m
2.JA.10dPizgrischite(Cu,Fe)Cu14PbBi17S35Mon. 2/m : B2/m
2.JA.10bKupčíkiteCu3.4Fe0.6Bi5S10Mon. 2/m : B2/m
2.JA.15CuboargyriteAgSbS2Iso. m3m (4/m 3 2/m)
2.JA.20BohdanowicziteAgBiSe2Trig. 3m (3 2/m) : P3m1
2.JA.20MatilditeAgBiS2Trig. 3 2 : P31 2 1
2.JA.20VolynskiteAgBiTe2Trig. 3m (3 2/m) : P3m1

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 SchapbachiteHide

References for SchapbachiteHide

Reference List:

Localities for SchapbachiteHide

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
 
  • Jujuy Province
    • Rinconada Department
      • Mina Pirquitas
Austria
 
  • Tyrol
    • Imst District
      • Nassereith
        • Heiterwand
Bulgaria
 
  • Pernik Province
    • Trun Municipality
      • Trun
  • Sofia Province
    • Botevgrad Municipality
Chile
 
  • Arica y Parinacota
    • Parinacota Province
      • Ticnamar area
China
 
  • Jilin
    • Yanbian Chaoxianzu
      • Longjing City
Finland
 
  • Central Finland
    • Pihtipudas
      • Kanalanmäki area
        • Säkkärämäki
  • Satakunta
    • Eurajoki
France
 
  • Auvergne-Rhône-Alpes
    • Haute-Loire
      • Brioude
        • Langeac
          • Barlet
Germany (TL)
 
  • Baden-Württemberg
    • Freiburg Region
      • Ortenaukreis
        • Gengenbach
          • Gengenbach
      • Waldshut
        • Dachsberg
          • Urberg
    • Karlsruhe Region
      • Freudenstadt
        • Bad Rippoldsau-Schapbach
      • Rhein-Neckar-Kreis
        • Weinheim
          • Hohensachsen
            • Kohlbach
  • Bavaria
    • Lower Bavaria
      • Regen District
        • Bodenmais
    • Upper Palatinate
  • Brandenburg
    • Spree-Neiße
      • Spremberg
  • Saxony
    • Erzgebirgskreis
Italy
 
  • Sardinia
    • Nuoro Province
      • Gadoni
    • South Sardinia Province
      • Nuxis
  • Trentino-Alto Adige (Trentino-South Tyrol)
    • Trento Province (Trentino)
      • Pergine Valsugana
Kazakhstan
 
  • Akmola Region
New Zealand
 
  • Tasman Region
    • Aorere Goldfield
Norway
 
  • Agder
    • Vegårshei
Peru
 
  • Huancavelica
    • Angaraes Province
      • Julcani District
Russia
 
  • Buryatia
    • Dzhida Basin
      • Zakamensk District
        • Dzhida W-Mo District
  • Sakhalin Oblast
    • Kuril Islands (Kurile Islands)
      • Yuzhno-Kurilsky District
        • Kunashir Island
Slovakia
 
  • Banská Bystrica Region
    • Banská Štiavnica District
    • Žarnovica District
      • Hodruša-Hámre
        • Hodruša-Hámre mines
  • Košice Region
    • Gelnica District
      • Švedlár
Tajikistan
 
  • Sughd
    • Mastchoh District
      • Altyn-Topkan ore field (Zarnisor ore field)
 
Mineral and/or Locality  
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