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About BaumstarkiteHide

Manfred Baumstark
Minor As-for-Sb substitution possible. Formerly given as AgSbS2.
greyish black to black
Specific Gravity:
Crystal System:
For German mineralogist and mineral dealer, Manfred Baumstark (b. 1954), who discovered the mineral.
Polymorph of:
Isostructural with:
The triclinic polymorph of Miargyrite and Cuboargyrite.

Classification of BaumstarkiteHide

Approval Year:

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
A : With Cu, Ag, Fe (without Pb)

Physical Properties of BaumstarkiteHide

greyish black to black
greyish black
2½ on Mohs scale
VHN25=89.3 kg/mm2 - Vickers
on {001}, good on {100}
5.33 g/cm3 (Measured)    5.39 g/cm3 (Calculated)

Optical Data of BaumstarkiteHide

Strong to weak
470nmR1=31.30%R2= 39.65%imR1= 16.60%imR2= 23.60%
546nmR1=29.20%R2= 37.30%imR1= 14.60%imR2= 21.15%
589nmR1=27.80%R2= 36.10%imR1= 13.35%imR2= 20.10%
650nmR1=26.15%R2= 33.05%imR1= 12.16%imR2= 17.60%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 39.65%.
R1 shown in black, R2 shown in red, imR1 shown in green, imR2 shown in blue
Colour in reflected light:
Grey to white

Chemical Properties of BaumstarkiteHide


Minor As-for-Sb substitution possible. Formerly given as AgSbS2.

Crystallography of BaumstarkiteHide

Crystal System:
Class (H-M):
1 - Pinacoidal
Space Group:
Cell Parameters:
a = 7.766 Å, b = 8.322 Å, c = 8.814 Å
α = 100.62°, β = 104.03°, γ = 90.22°
a:b:c = 0.933 : 1 : 1.059
Unit Cell V:
542 ų
{001},{10_1},{201},{010} and {01_1} most frequent, {100} subordinate.
Occasionally on (001)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
3.425 Å(8)
3.224 Å(6)
2.841 Å(8)
2.798 Å(100)
2.013 Å(5)
1.971 Å(5)
1.3994 Å(6)

Type Occurrence of BaumstarkiteHide

General Appearance of Type Material:
Individual crystals not exceeding 3 mm, crystal aggregates up to 40x10mm coating miargyrite. Anhedral grains in miargyrite common (up to several mm)
Geological Setting of Type Material:
In high-grade silver ores of hypogene origin.
Associated Minerals at Type Locality:

Synonyms of BaumstarkiteHide

Other Language Names for BaumstarkiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
10 photos of Baumstarkite associated with MiargyriteAgSbS2
4 photos of Baumstarkite associated with PyrargyriteAg3SbS3
1 photo of Baumstarkite associated with CalciteCaCO3
1 photo of Baumstarkite associated with BaryteBaSO4
1 photo of Baumstarkite associated with QuartzSiO2

Related Minerals - Nickel-Strunz GroupingHide

2.HA.05ChalcostibiteCuSbS2Orth. mmm (2/m 2/m 2/m)
2.HA.05EmplectiteCuBiS2Orth. mmm (2/m 2/m 2/m) : Pmna
2.HA.10MiargyriteAgSbS2Mon. 2/m : B2/b
2.HA.20BerthieriteFeSb2S4Orth. mmm (2/m 2/m 2/m)
2.HA.25AramayoiteAg3Sb2(Bi,Sb)S6Tric. 1 : P1

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.

References for BaumstarkiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Effenberger, H., Paar, W.H., Topa, D., Criddle, A.J., and Fleck, M. (2002) The new mineral baumstarkite and a structural reinvestigation of aramayoite and miargyrite. American Mineralogist: 87: 753-764.

Internet Links for BaumstarkiteHide

Localities for BaumstarkiteHide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Potosí
    • Antonio Quijarro Province
      • Agua de Castilla
        • Porco
Kempff, O., Paar, W.H., Tawackoli, S.: "Minerales de Bolivia", 115pp (La Paz, 2009)
    • Sud Chichas Province
      • Chocaya-Animas (Animas-Chocaya)
  • Grand Est
    • Haut-Rhin
      • Colmar-Ribeauvillé
        • Ste Marie-aux-Mines
N. MEISSER 2015 analysis
            • Sankt Jakob vein
Lapis 27(11), 2002
This mine worked the same vein as Gabe gottes mine. From the 19th century, ore from a large part of the Saint-Jacques mine network was transported to level -40 of Gabe Gottes before being sent to the processing plant. The mineralization of this sector is therefore very comparable to that of Gabe-Gotes.
  • Attica
    • East Attica
      • Lavreotiki
Rieck, B., Kolitsch, U., Voudouris, P., Giester, G., Tzeferis, P. (2020): Lavrion, Griechenland: Weitere Neufunde aus dem berühmten Bergbaurevier. Mineralien-Welt 29(5), 32-77 (in German).
          • Plaka
            • Plaka Mines
Rieck, B., Kolitsch, U., Voudouris, P., Giester, G., Tzeferis, P. (2020): Lavrion, Griechenland: Weitere Neufunde aus dem berühmten Bergbaurevier. Mineralien-Welt 31(3), 6-21 (in German).
  • Lombardy
    • Lecco Province
      • Valsassina
        • Introbio
Guastoni A., Gentile P., Nestola F., Possenti I. (2016) Baumstarkite di Prapiazzo, Introbio, Valsassina (LC). Novità di mineralogia sistematica italiana. Rivista Mineralogica Italiana, 50, 2 (2-2016), 120.
  • Hokkaidō Prefecture
    • Ishikari Subprefecture
Kitakaze, A., Itoh, H., Komatsu, R., & Higuchi, Y. (2012) Baumstarkite from the Koryu Mine, Hokkaido, Japan. The Canadian Mineralogist, 50(1), 101-109.
Peru (TL)
  • Huancavelica
    • Castrovirreyna Province
      • Castrovirreyna District
        • Castrovirreyna mining district
Amer.Min.(2002) 87, 753-764; Lapis 27(11), 2002
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