Where it forms, where it's found
- Type locality
- Lengenbach Quarry
- Fäld
- Binn
- Goms
- Valais
- Switzerland
46.3653°, 8.2205°
6recorded occurrences
Safety & handling
Physical
Optical
- Anisotropism
- Weak
- Tropism
- Anisotropic
- Reflectance R%
- (38.9,40.0) 400, (38.5,39.8) 420, (38.2,39.4) 440, (37.6,39.0) 460, (37.3,38.7) 480, (36.8,38.3) 500, (36.3,37.9) 520, (35.9,37.4) 540, (35.5,36.9) 560, (35.3,36.5) 580, (35.1,36.1) 600, (34.7,35.7) 620, (34.2,35.2) 640, (33.5,34.4) 660, (32.8,33.7) 680, (32.0,32.9) 700
Reflected-light panel
R̄ 35.8 %anisotropic · dual curve
Specimen
White reference
R₁ R₂
Mode
Crystallography
- Twinning
On (100); twin lamellae seen in polished section.
- Comment
Point Group: _1 or 1; Two subcells are recognized: the first (pseudotetragonal) has a = 36.892(20) b = 5.842(5) c = 5.847(5) α = 90.00◦ β = 92.00◦ γ = 91.01(1)◦ Z = 6 and the second (pseudohexagonal) has a = 36.892(20) b = 3.895(4) c = 6.378(7) α = 90.00◦ β = 90.00◦ γ = 91.01(1)◦ Z=6
Chemical composition
- Impurities
- Fe
- Sb
Synonyms
- Lengenbachiet
In other languages
- French
- Lengenbachite
- German
- Lengenbachit
- Spanish
- Lengenbachita
- Italian
- Lengenbachite
Classification
Strunz
10th ed.2.HF.30
- 2Sulfides and SulfosaltsClass
- 2.HSulfosalts of SnS archetypeDivision
- 2.HFWith SnS and PbS archetype structure unitsGroup
- 2.HF.30LengenbachiteSpecies
Dana
8th ed.03.03.07.01
- 03SulfosaltsClass
- 03.033 <ø < 4Type
- 03.03.07— unnamed intermediate level —Group
- 03.03.07.01LengenbachiteSpecies
CIM
—5.7.40
- 5Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)Class
- 5.7Sulpharsenites etc. of Pb and other metalsGroup
- 5.7.40LengenbachiteSpecies
Literature, links & citation
Citations
- 1904Solly, R.H. (1904) Various minerals from the Lengenbach quarry. Nature: 71: 118.
- 1905Solly, R. H. (1905) Some new minerals from the Binnenthal, Switzerland. Mineralogical Magazine and Journal of the Mineralogical Society, 14 (64) 72-82 doi:10.1180/minmag.1905.014.64.03 DOI: 10.1180/minmag.1905.014.64.03
- 1944Palache, Charles, Berman, Harry, Frondel, Clifford (1944) The System of Mineralogy (7th ed.) Vol. 1 - Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, New York.
- 1968Nowacki, W. (1968) Über Hatchit, Lengenbachit und Vrbait. Neues Jahrbuch für Mineralogie, Monatshefte: 1968: 69-75.
- 1988Williams, Timothy B., Pring, Allan (1988) Structure of lengenbachite: A high-resolution transmission electron microscope study. American Mineralogist, 73 (11-12) 1426-1433
Cite this entry
@misc{mineral2026,
author = {Mineral Index editorial board},
title = {Lengenbachite — Mineral Index},
year = {2026},
url = {https://mineralindex.org/minerals/lengenbachite-2373},
note = {Accessed 2026-05-11}
}