Lasmanisite

Ag12Pb13Mn11Sb44S96
IMA status
  • Approved
  • Pending publication
IMA symbol
Lmn
IMA approved
2023
Also known as
  • Lasmanisiet

Where it forms, where it's found

Type locality
Bear Basin Mines
  1. Buena Vista Mining District
  2. King County
  3. Washington
  4. USA

47.6395°, -121.4862°

1recorded occurrences
Source · OpenStreetMap

Safety & handling

Crystallography

Crystal system
Orthorhombic
Space group
#44
Cell parameters
a = 13.0507(7) Å · b = 16.2463(9) Å · c = 19.3650(10) Å
Ratio a:b:c
1 : 1.245 : 1.484

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
51SbAntimonyAntimony44121.7605357.440
41.12%
16SSulfurSulfur9632.0603077.760
23.62%
82PbLeadLead13207.2002693.600
20.68%
47AgSilverSilver12107.8681294.416
9.94%
25MnManganeseManganese1154.938604.318
4.64%
Total13027.534100.00%

Mass share = atoms × atomic mass ÷ molar mass × 100

From IMA formula

Synonyms

  • Lasmanisiet

In other languages

German
IMA 2022-128 · Lasmanisit

Classification

Strunz
10th ed.

2.JB

  • 2Sulfides and SulfosaltsClass
  • 2.JSulfosalts of PbS archetypeDivision
  • 2.JBGalena derivatives, with PbGroup
  • 2.JBLasmanisiteSpecies

Group, growth & confusion

Literature, links & citation

Citations
  1. 2023Bosi, Ferdinando, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2023) Newsletter 72. Mineralogical Magazine, 87 (3) 512-518 doi:10.1180/mgm.2023.21DOI: 10.1180/mgm.2023.21
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Lasmanisite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/lasmanisite-470693},
  note      = {Accessed 2026-05-11}
}