Schapbachite
A valid IMA mineral species - grandfathered
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About Schapbachite
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.
Type Locality:
Dimorph of:
Unique Identifiers
Mindat ID:
3558
Long-form identifier:
mindat:1:1:3558:9
Similar Names
IMA Classification of Schapbachite
Approved, 'Grandfathered' (first described prior to 1959)
IMA status notes:
Redefined by the IMA
IMA Formula:
Ag1+0.4Pb2+0.2Bi3+0.4S2-
Approval year:
1982
Classification of Schapbachite
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
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
5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
2 : Sulpharsenites etc. of Ag
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Spb | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Schapbachite
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 Schapbachite
Type:
Isotropic
Reflectivity:
| Wavelength | R1 (%) |
|---|---|
| 470nm | 45.19% |
| 546nm | 44.73% |
| 589nm | 44.32% |
| 650nm | 43.94% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 45.19%.
Chemistry of Schapbachite
Mindat Formula:
Ag0.4Pb0.2Bi0.4S
Pb is necessary for the stabilisation of the cubic structure of schapbachite.
Pb is necessary for the stabilisation of the cubic structure of schapbachite.
Element Weights:
Elements listed:
Crystallography of Schapbachite
Crystal System:
Isometric
Class (H-M):
m3m(4/m32/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 Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0009219 | Schapbachite | Geller S, Wernick J H (1959) Ternary semiconducting compounds with sodium chloride-like structure: AgSbSe2, AgSbTe2, AgBiS2, AgBiSe2 Acta Crystallographica 12 46-54 | ![]() | 1959 | synthetic | 0 | 293 |
| 0009220 | Schapbachite | Geller S, Wernick J H (1959) Ternary semiconducting compounds with sodium chloride-like structure: AgSbSe2, AgSbTe2, AgBiS2, AgBiSe2 Acta Crystallographica 12 46-54 | ![]() | 1959 | synthetic | 0 | 473 |
| 0009221 | Schapbachite | Geller S, Wernick J H (1959) Ternary semiconducting compounds with sodium chloride-like structure: AgSbSe2, AgSbTe2, AgBiS2, AgBiSe2 Acta Crystallographica 12 46-54 | ![]() | 1959 | synthetic | 0 | 516 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.290 Å | (80) |
| 2.853 Å | (100) |
| 2.014 Å | (80) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Type Occurrence of Schapbachite
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:
Synonyms of Schapbachite
Wismuthsilber (in part)
Other Language Names for Schapbachite
Dutch:Schapbachiet
German:Schapbachit
Silberwismutglanz (in part)
Silberwismutglanz (in part)
Russian:Шапбахит
Simplified Chinese:硫铅铋银矿
Spanish:Schapbachita
Relationship of Schapbachite to other Species
Structurally related to group(s):
Common Associates
Associations Based on Photo Data:
| 3 photos of Schapbachite associated with Quartz | SiO2 |
| 2 photos of Schapbachite associated with Matildite | AgBiS2 |
| 2 photos of Schapbachite associated with Chalcopyrite | CuFeS2 |
| 2 photos of Schapbachite associated with Galena | PbS |
| 2 photos of Schapbachite associated with Arsenopyrite | FeAsS |
Related Minerals - Strunz-mindat Grouping
| 2.JA. | Ferdowsiite | Ag8(Sb5As3)S16 |
| 2.JA. | Luboržákite | Mn2AsSbS5 |
| 2.JA. | Sangenaroite | Ag8(Sb8-xAsx)SΣ16 |
| 2.JA.05a | Pavonite | AgBi3S5 |
| 2.JA.05b | Grumiplucite | HgBi2S4 |
| 2.JA.05c | Kudriavite | (Cd,Pb)Bi2S4 |
| 2.JA.05d | Cupromakovickyite | Cu4AgPb2Bi9S18 |
| 2.JA.05e | Benjaminite | Ag3Bi7S12 |
| 2.JA.05i | Livingstonite | HgSb4S6(S2) |
| 2.JA.05h | Mozgovaite | PbBi4S7 |
| 2.JA.05 | Dantopaite | Ag5Bi13S22 |
| 2.JA.05a | Cupropavonite | Cu0.9Ag0.5Pb0.6Bi2.5S5 |
| 2.JA.05 | Selenodantopaite | Ag5Bi13Se22 |
| 2.JA.05g | Borodaevite | Ag5(Bi,Pb,Fe)8(Sb,Bi)2S17 |
| 2.JA.05a | Cupromakopavonite | Ag3Cu8Pb4Bi19S38 |
| 2.JA.05d | Makovickyite | Cu1.12Ag0.81Pb0.27Bi5.35S9 |
| 2.JA.05f | Mummeite | Cu0.58Ag3.11Pb1.10Bi6.65S13 |
| 2.JA.10b | Kupčíkite | Cu3.4Fe0.6Bi5S10 |
| 2.JA.10d | Pizgrischite | (Cu,Fe)Cu14PbBi17S35 |
| 2.JA.10c | Hodrušite | Cu8Bi12S22 |
| 2.JA.10a | Cuprobismutite | Cu8AgBi13S24 |
| 2.JA.10e | Padĕraite | Cu7[(Cu,Ag)0.33Pb1.33Bi11.33]S22 |
| 2.JA.15 | Cuboargyrite | AgSbS2 |
| 2.JA.20 | Matildite | AgBiS2 |
| 2.JA.20 | Volynskite | AgBiTe2 |
| 2.JA.20 | Bohdanowiczite | AgBiSe2 |
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.
Internet Links for Schapbachite
mindat.org URL:
https://www.mindat.org/min-3558.html
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Please feel free to link to this page.
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References for Schapbachite
Reference List:
Hoda, Syed N., Chang, Luke L. Y. (1975) Phase relations in the systems PbS-Ag2S-Sb2S3 and PbS-Ag2S-Bi2S3. American Mineralogist, 60 (7-8) 621-633
Hey, M. H. (1982) International Mineralogical Association: Commission on New Minerals and Mineral Names. Mineralogical Magazine, 46 (341) 513-514 doi:10.1180/minmag.1982.046.341.25 [redefinition]
Moëlo, Yves, Makovicky, Emil, Mozgova, Nadejda N., Jambor, John L., Cook, Nigel, Pring, Allan, Paar, Werner, Nickel, Ernest H., Graeser, Stephan, Karup-Møller, Sven, Balic-unic, Tonči, Mumme, William G., Vurro, Filippo, Topa, Dan (2008) Sulfosalt systematics: a review. Report of the sulfosalt sub-committee of the IMA Commission on Ore Mineralogy. European Journal of Mineralogy, 20 (1) 7-62 doi:10.1127/0935-1221/2008/0020-1778
Staude, S., Dorn, A., Pfaff, K., Markl, G. (2010) Assemblages of Ag-Bi sulfosalts and conditions of their formation: The type locality of schapbachite (Ag0.4Pb0.2Bi0.4S) and neighboring mines in the Schwarzwald ore district, southern Germany. The Canadian Mineralogist, 48 (3) 441-466 doi:10.3749/canmin.48.3.441
Localities for Schapbachite
Showing 37 localities.
Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Argentina | |
| Silver Standard Resources Inc |
Austria | |
| Wetzenstein (1972) |
Bulgaria | |
| I. Kostov et al. (1964) |
| Kostov et al. (1964) |
Chile | |
| Gröpper et al. (1991) |
China | |
| Hongyuan Xu (2012) |
Europe | |
| Jahn (2002) |
Finland | |
| Novoselov et al. (2015) |
| Pere Tuomas (2009) |
France | |
| Pélisson (1989) |
Germany (TL) | |
| Walenta et al. (2004) +1 other reference |
| Steen (2013) |
| Kenngott (1853) |
| Walenta (1991) | |
| Belendorff (2021) |
| Obermüller (1993) |
| Dill et al. (2010) |
| Kopp et al. (2012) |
| Lapis 30 (7/8) |
Italy | |
| Stara et al. (1999) |
| Gian Claudio Lecca et al. (2024) +1 other reference |
| Exel (1987) |
Japan | |
| AKATSUKA (1961) |
Kazakhstan | |
| Kalinin et al. (2018) |
New Zealand | |
| Rabone (1977) |
Norway | |
| Naik et al. (1976) |
Peru | |
| Duval et al. (1986) |
Russia | |
| Damdinova et al. (2021) |
| Simon et al. (1997) |
Slovakia | |
| Chovan M. et al. (2021) |
| Chovan et al. (2016) +2 other references |
| Koděra et al. (1986) |
| Drnzíková L. (1969) | |
Tajikistan | |
| Badalov et al. (1975) |
| Badalov et al. (1975) | |
| Badalov et al. (1975) | |
| Badalov et al. (1975) |
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The
Friedrich-Christian Mine, Wildschapbach valley, Bad Rippoldsau-Schapbach, Freudenstadt, Karlsruhe Region, Baden-Württemberg, Germany